/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/fibonacci.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 03:51:16,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 03:51:16,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 03:51:16,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 03:51:16,478 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 03:51:16,501 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 03:51:16,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 03:51:16,502 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 03:51:16,502 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 03:51:16,504 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 03:51:16,504 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 03:51:16,504 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 03:51:16,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 03:51:16,504 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 03:51:16,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 03:51:16,505 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 03:51:16,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 03:51:16,505 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 03:51:16,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 03:51:16,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 03:51:16,505 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 03:51:16,506 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 03:51:16,506 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 03:51:16,506 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 03:51:16,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 03:51:16,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 03:51:16,506 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 03:51:16,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 03:51:16,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 03:51:16,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 03:51:16,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 03:51:16,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 03:51:16,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 03:51:16,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 03:51:16,507 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 03:51:16,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 03:51:16,507 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 03:51:16,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 03:51:16,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 03:51:16,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 03:51:16,745 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 03:51:16,746 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 03:51:16,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/fibonacci.wvr.bpl [2021-06-05 03:51:16,747 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/fibonacci.wvr.bpl' [2021-06-05 03:51:16,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 03:51:16,778 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 03:51:16,779 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 03:51:16,780 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 03:51:16,780 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 03:51:16,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:51:16" (1/1) ... [2021-06-05 03:51:16,794 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:51:16" (1/1) ... [2021-06-05 03:51:16,798 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 03:51:16,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 03:51:16,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 03:51:16,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 03:51:16,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:51:16" (1/1) ... [2021-06-05 03:51:16,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:51:16" (1/1) ... [2021-06-05 03:51:16,807 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:51:16" (1/1) ... [2021-06-05 03:51:16,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:51:16" (1/1) ... [2021-06-05 03:51:16,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:51:16" (1/1) ... [2021-06-05 03:51:16,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:51:16" (1/1) ... [2021-06-05 03:51:16,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:51:16" (1/1) ... [2021-06-05 03:51:16,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 03:51:16,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 03:51:16,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 03:51:16,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 03:51:16,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:51:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 03:51:16,863 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 03:51:16,863 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 03:51:16,863 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 03:51:16,863 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 03:51:16,863 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 03:51:16,863 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 03:51:16,863 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 03:51:16,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 03:51:16,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 03:51:16,864 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 03:51:17,038 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 03:51:17,039 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 03:51:17,042 INFO L202 PluginConnector]: Adding new model fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:51:17 BoogieIcfgContainer [2021-06-05 03:51:17,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 03:51:17,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 03:51:17,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 03:51:17,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 03:51:17,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:51:16" (1/2) ... [2021-06-05 03:51:17,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d154ec8 and model type fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:51:17, skipping insertion in model container [2021-06-05 03:51:17,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:51:17" (2/2) ... [2021-06-05 03:51:17,048 INFO L111 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.bpl [2021-06-05 03:51:17,051 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 03:51:17,052 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 03:51:17,052 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 03:51:17,052 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 03:51:17,096 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 03:51:17,110 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 03:51:17,129 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:51:17,129 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:51:17,130 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:51:17,130 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:51:17,130 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:51:17,130 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:51:17,130 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:51:17,130 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:51:17,135 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2021-06-05 03:51:17,142 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:17,143 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:17,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 03:51:17,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:17,147 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:17,148 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:17,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:17,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1266515445, now seen corresponding path program 1 times [2021-06-05 03:51:17,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:17,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756540199] [2021-06-05 03:51:17,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:17,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:17,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:17,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:17,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756540199] [2021-06-05 03:51:17,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756540199] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:51:17,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:51:17,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 03:51:17,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104870601] [2021-06-05 03:51:17,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:51:17,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:17,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:51:17,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:51:17,393 INFO L87 Difference]: Start difference. First operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:17,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:17,471 INFO L93 Difference]: Finished difference Result 61 states and 108 transitions. [2021-06-05 03:51:17,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:51:17,472 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 03:51:17,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:17,482 INFO L225 Difference]: With dead ends: 61 [2021-06-05 03:51:17,482 INFO L226 Difference]: Without dead ends: 54 [2021-06-05 03:51:17,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:51:17,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-06-05 03:51:17,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2021-06-05 03:51:17,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:17,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 79 transitions. [2021-06-05 03:51:17,518 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 79 transitions. Word has length 13 [2021-06-05 03:51:17,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:17,518 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 79 transitions. [2021-06-05 03:51:17,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:17,518 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 79 transitions. [2021-06-05 03:51:17,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 03:51:17,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:17,519 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:17,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 03:51:17,519 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:17,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:17,523 INFO L82 PathProgramCache]: Analyzing trace with hash 861572483, now seen corresponding path program 2 times [2021-06-05 03:51:17,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:17,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299424720] [2021-06-05 03:51:17,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:17,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:17,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:17,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299424720] [2021-06-05 03:51:17,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299424720] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:51:17,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:51:17,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 03:51:17,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848183514] [2021-06-05 03:51:17,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:51:17,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:17,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:51:17,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:51:17,640 INFO L87 Difference]: Start difference. First operand 41 states and 79 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:17,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:17,702 INFO L93 Difference]: Finished difference Result 52 states and 95 transitions. [2021-06-05 03:51:17,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:51:17,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 03:51:17,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:17,703 INFO L225 Difference]: With dead ends: 52 [2021-06-05 03:51:17,703 INFO L226 Difference]: Without dead ends: 45 [2021-06-05 03:51:17,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:51:17,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-05 03:51:17,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-06-05 03:51:17,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:17,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 85 transitions. [2021-06-05 03:51:17,714 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 85 transitions. Word has length 13 [2021-06-05 03:51:17,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:17,715 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 85 transitions. [2021-06-05 03:51:17,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:17,716 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 85 transitions. [2021-06-05 03:51:17,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 03:51:17,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:17,716 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:17,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 03:51:17,717 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:17,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:17,718 INFO L82 PathProgramCache]: Analyzing trace with hash -580645877, now seen corresponding path program 1 times [2021-06-05 03:51:17,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:17,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135458777] [2021-06-05 03:51:17,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:17,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:17,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135458777] [2021-06-05 03:51:17,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135458777] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:51:17,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:51:17,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:51:17,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508176896] [2021-06-05 03:51:17,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:51:17,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:17,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:51:17,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:51:17,772 INFO L87 Difference]: Start difference. First operand 45 states and 85 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:17,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:17,831 INFO L93 Difference]: Finished difference Result 63 states and 114 transitions. [2021-06-05 03:51:17,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:51:17,832 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 03:51:17,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:17,832 INFO L225 Difference]: With dead ends: 63 [2021-06-05 03:51:17,832 INFO L226 Difference]: Without dead ends: 55 [2021-06-05 03:51:17,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:51:17,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-06-05 03:51:17,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2021-06-05 03:51:17,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:17,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2021-06-05 03:51:17,836 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 14 [2021-06-05 03:51:17,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:17,836 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2021-06-05 03:51:17,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:17,837 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2021-06-05 03:51:17,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 03:51:17,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:17,837 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:17,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 03:51:17,837 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:17,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:17,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1509805029, now seen corresponding path program 1 times [2021-06-05 03:51:17,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:17,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535952185] [2021-06-05 03:51:17,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:17,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:17,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535952185] [2021-06-05 03:51:17,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535952185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:17,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424240977] [2021-06-05 03:51:17,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:17,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 03:51:17,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:17,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424240977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:17,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:17,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 03:51:17,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962089399] [2021-06-05 03:51:17,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:51:17,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:17,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:51:17,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:51:17,966 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:18,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:18,012 INFO L93 Difference]: Finished difference Result 59 states and 110 transitions. [2021-06-05 03:51:18,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:51:18,012 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 03:51:18,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:18,013 INFO L225 Difference]: With dead ends: 59 [2021-06-05 03:51:18,013 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 03:51:18,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:51:18,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 03:51:18,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2021-06-05 03:51:18,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.95) internal successors, (78), 40 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:18,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 78 transitions. [2021-06-05 03:51:18,019 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 78 transitions. Word has length 14 [2021-06-05 03:51:18,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:18,019 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 78 transitions. [2021-06-05 03:51:18,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:18,020 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 78 transitions. [2021-06-05 03:51:18,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 03:51:18,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:18,020 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:18,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:18,237 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:18,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:18,238 INFO L82 PathProgramCache]: Analyzing trace with hash -709388465, now seen corresponding path program 2 times [2021-06-05 03:51:18,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:18,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565604741] [2021-06-05 03:51:18,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:18,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:18,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565604741] [2021-06-05 03:51:18,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565604741] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:51:18,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:51:18,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:51:18,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147300826] [2021-06-05 03:51:18,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:51:18,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:18,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:51:18,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:51:18,302 INFO L87 Difference]: Start difference. First operand 41 states and 78 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:18,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:18,333 INFO L93 Difference]: Finished difference Result 80 states and 146 transitions. [2021-06-05 03:51:18,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:51:18,333 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 03:51:18,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:18,334 INFO L225 Difference]: With dead ends: 80 [2021-06-05 03:51:18,334 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 03:51:18,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:51:18,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 03:51:18,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 43. [2021-06-05 03:51:18,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:18,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 85 transitions. [2021-06-05 03:51:18,345 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 85 transitions. Word has length 14 [2021-06-05 03:51:18,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:18,345 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 85 transitions. [2021-06-05 03:51:18,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:18,346 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 85 transitions. [2021-06-05 03:51:18,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 03:51:18,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:18,346 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:18,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 03:51:18,346 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:18,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:18,347 INFO L82 PathProgramCache]: Analyzing trace with hash -137933659, now seen corresponding path program 3 times [2021-06-05 03:51:18,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:18,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288615417] [2021-06-05 03:51:18,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:18,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:18,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:18,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288615417] [2021-06-05 03:51:18,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288615417] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:51:18,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:51:18,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:51:18,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869024881] [2021-06-05 03:51:18,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:51:18,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:18,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:51:18,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:51:18,387 INFO L87 Difference]: Start difference. First operand 43 states and 85 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:18,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:18,434 INFO L93 Difference]: Finished difference Result 77 states and 137 transitions. [2021-06-05 03:51:18,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:51:18,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 03:51:18,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:18,436 INFO L225 Difference]: With dead ends: 77 [2021-06-05 03:51:18,436 INFO L226 Difference]: Without dead ends: 74 [2021-06-05 03:51:18,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:51:18,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-06-05 03:51:18,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 42. [2021-06-05 03:51:18,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:18,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2021-06-05 03:51:18,445 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 14 [2021-06-05 03:51:18,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:18,449 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2021-06-05 03:51:18,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:18,449 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2021-06-05 03:51:18,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 03:51:18,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:18,451 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:18,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 03:51:18,451 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:18,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:18,451 INFO L82 PathProgramCache]: Analyzing trace with hash -2069505205, now seen corresponding path program 2 times [2021-06-05 03:51:18,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:18,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941680686] [2021-06-05 03:51:18,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:18,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:18,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941680686] [2021-06-05 03:51:18,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941680686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:18,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669886209] [2021-06-05 03:51:18,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:18,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:18,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:18,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 03:51:18,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:18,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669886209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:18,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:18,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 03:51:18,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850061452] [2021-06-05 03:51:18,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:51:18,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:18,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:51:18,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:51:18,569 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:18,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:18,595 INFO L93 Difference]: Finished difference Result 67 states and 123 transitions. [2021-06-05 03:51:18,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:51:18,595 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 03:51:18,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:18,596 INFO L225 Difference]: With dead ends: 67 [2021-06-05 03:51:18,596 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 03:51:18,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:51:18,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 03:51:18,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2021-06-05 03:51:18,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:18,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 84 transitions. [2021-06-05 03:51:18,607 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 84 transitions. Word has length 14 [2021-06-05 03:51:18,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:18,607 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 84 transitions. [2021-06-05 03:51:18,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:18,607 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 84 transitions. [2021-06-05 03:51:18,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 03:51:18,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:18,608 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:18,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:18,819 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:18,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:18,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1760870987, now seen corresponding path program 3 times [2021-06-05 03:51:18,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:18,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375075623] [2021-06-05 03:51:18,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:18,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:18,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:18,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375075623] [2021-06-05 03:51:18,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375075623] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:51:18,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:51:18,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:51:18,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695286288] [2021-06-05 03:51:18,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:51:18,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:18,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:51:18,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:51:18,843 INFO L87 Difference]: Start difference. First operand 43 states and 84 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:18,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:18,886 INFO L93 Difference]: Finished difference Result 60 states and 108 transitions. [2021-06-05 03:51:18,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:51:18,887 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 03:51:18,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:18,888 INFO L225 Difference]: With dead ends: 60 [2021-06-05 03:51:18,888 INFO L226 Difference]: Without dead ends: 58 [2021-06-05 03:51:18,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:51:18,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-05 03:51:18,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 43. [2021-06-05 03:51:18,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:18,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 83 transitions. [2021-06-05 03:51:18,892 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 83 transitions. Word has length 14 [2021-06-05 03:51:18,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:18,892 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 83 transitions. [2021-06-05 03:51:18,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:18,893 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 83 transitions. [2021-06-05 03:51:18,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 03:51:18,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:18,893 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:18,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 03:51:18,893 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:18,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:18,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1740461429, now seen corresponding path program 4 times [2021-06-05 03:51:18,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:18,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86352101] [2021-06-05 03:51:18,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:18,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:18,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86352101] [2021-06-05 03:51:18,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86352101] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:51:18,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:51:18,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:51:18,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447010895] [2021-06-05 03:51:18,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:51:18,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:18,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:51:18,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:51:18,918 INFO L87 Difference]: Start difference. First operand 43 states and 83 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:18,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:18,943 INFO L93 Difference]: Finished difference Result 63 states and 119 transitions. [2021-06-05 03:51:18,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:51:18,946 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 03:51:18,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:18,946 INFO L225 Difference]: With dead ends: 63 [2021-06-05 03:51:18,946 INFO L226 Difference]: Without dead ends: 63 [2021-06-05 03:51:18,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:51:18,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-05 03:51:18,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2021-06-05 03:51:18,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:18,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 80 transitions. [2021-06-05 03:51:18,951 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 80 transitions. Word has length 14 [2021-06-05 03:51:18,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:18,953 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 80 transitions. [2021-06-05 03:51:18,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:18,953 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 80 transitions. [2021-06-05 03:51:18,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 03:51:18,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:18,953 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:18,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 03:51:18,953 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:18,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:18,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1478794711, now seen corresponding path program 5 times [2021-06-05 03:51:18,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:18,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754085156] [2021-06-05 03:51:18,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:18,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:18,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:18,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754085156] [2021-06-05 03:51:18,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754085156] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:51:18,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:51:18,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:51:18,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228899232] [2021-06-05 03:51:18,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:51:18,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:18,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:51:18,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:51:18,982 INFO L87 Difference]: Start difference. First operand 41 states and 80 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:19,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:19,010 INFO L93 Difference]: Finished difference Result 65 states and 121 transitions. [2021-06-05 03:51:19,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:51:19,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 03:51:19,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:19,011 INFO L225 Difference]: With dead ends: 65 [2021-06-05 03:51:19,011 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 03:51:19,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:51:19,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 03:51:19,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 41. [2021-06-05 03:51:19,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:19,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 80 transitions. [2021-06-05 03:51:19,013 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 80 transitions. Word has length 14 [2021-06-05 03:51:19,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:19,013 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 80 transitions. [2021-06-05 03:51:19,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:19,013 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 80 transitions. [2021-06-05 03:51:19,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 03:51:19,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:19,014 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:19,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 03:51:19,014 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:19,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:19,014 INFO L82 PathProgramCache]: Analyzing trace with hash 2050249517, now seen corresponding path program 6 times [2021-06-05 03:51:19,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:19,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909738510] [2021-06-05 03:51:19,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:19,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:19,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:19,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909738510] [2021-06-05 03:51:19,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909738510] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:51:19,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:51:19,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:51:19,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149079174] [2021-06-05 03:51:19,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:51:19,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:19,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:51:19,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:51:19,039 INFO L87 Difference]: Start difference. First operand 41 states and 80 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:19,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:19,069 INFO L93 Difference]: Finished difference Result 58 states and 103 transitions. [2021-06-05 03:51:19,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:51:19,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 03:51:19,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:19,070 INFO L225 Difference]: With dead ends: 58 [2021-06-05 03:51:19,070 INFO L226 Difference]: Without dead ends: 55 [2021-06-05 03:51:19,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:51:19,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-06-05 03:51:19,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2021-06-05 03:51:19,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:19,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 73 transitions. [2021-06-05 03:51:19,072 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 73 transitions. Word has length 14 [2021-06-05 03:51:19,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:19,072 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 73 transitions. [2021-06-05 03:51:19,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:19,072 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 73 transitions. [2021-06-05 03:51:19,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 03:51:19,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:19,072 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:19,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 03:51:19,073 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:19,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:19,073 INFO L82 PathProgramCache]: Analyzing trace with hash 118677971, now seen corresponding path program 4 times [2021-06-05 03:51:19,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:19,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571303947] [2021-06-05 03:51:19,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:19,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:19,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:19,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571303947] [2021-06-05 03:51:19,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571303947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:19,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678477009] [2021-06-05 03:51:19,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:19,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:51:19,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:19,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 03:51:19,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:19,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678477009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:19,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:19,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 03:51:19,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005453606] [2021-06-05 03:51:19,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:51:19,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:19,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:51:19,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:51:19,172 INFO L87 Difference]: Start difference. First operand 39 states and 73 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:19,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:19,206 INFO L93 Difference]: Finished difference Result 60 states and 108 transitions. [2021-06-05 03:51:19,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:51:19,207 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 03:51:19,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:19,208 INFO L225 Difference]: With dead ends: 60 [2021-06-05 03:51:19,208 INFO L226 Difference]: Without dead ends: 60 [2021-06-05 03:51:19,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:51:19,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-06-05 03:51:19,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2021-06-05 03:51:19,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:19,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 79 transitions. [2021-06-05 03:51:19,211 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 79 transitions. Word has length 14 [2021-06-05 03:51:19,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:19,211 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 79 transitions. [2021-06-05 03:51:19,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:19,211 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 79 transitions. [2021-06-05 03:51:19,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 03:51:19,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:19,211 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:19,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 03:51:19,425 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:19,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:19,425 INFO L82 PathProgramCache]: Analyzing trace with hash -345913133, now seen corresponding path program 5 times [2021-06-05 03:51:19,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:19,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847546863] [2021-06-05 03:51:19,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:19,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:19,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847546863] [2021-06-05 03:51:19,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847546863] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:51:19,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:51:19,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:51:19,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278870061] [2021-06-05 03:51:19,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:51:19,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:19,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:51:19,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:51:19,448 INFO L87 Difference]: Start difference. First operand 41 states and 79 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:19,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:19,501 INFO L93 Difference]: Finished difference Result 74 states and 127 transitions. [2021-06-05 03:51:19,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:51:19,501 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 03:51:19,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:19,502 INFO L225 Difference]: With dead ends: 74 [2021-06-05 03:51:19,502 INFO L226 Difference]: Without dead ends: 72 [2021-06-05 03:51:19,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:51:19,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-06-05 03:51:19,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2021-06-05 03:51:19,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:19,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2021-06-05 03:51:19,503 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 14 [2021-06-05 03:51:19,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:19,503 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2021-06-05 03:51:19,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:19,503 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2021-06-05 03:51:19,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 03:51:19,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:19,504 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:19,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 03:51:19,504 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:19,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:19,504 INFO L82 PathProgramCache]: Analyzing trace with hash 36807255, now seen corresponding path program 6 times [2021-06-05 03:51:19,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:19,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485409676] [2021-06-05 03:51:19,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:19,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:19,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485409676] [2021-06-05 03:51:19,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485409676] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:51:19,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:51:19,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 03:51:19,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195404992] [2021-06-05 03:51:19,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:51:19,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:19,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:51:19,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:51:19,523 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:19,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:19,552 INFO L93 Difference]: Finished difference Result 44 states and 80 transitions. [2021-06-05 03:51:19,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:51:19,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 03:51:19,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:19,553 INFO L225 Difference]: With dead ends: 44 [2021-06-05 03:51:19,553 INFO L226 Difference]: Without dead ends: 40 [2021-06-05 03:51:19,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:51:19,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-06-05 03:51:19,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-06-05 03:51:19,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:19,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2021-06-05 03:51:19,554 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 14 [2021-06-05 03:51:19,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:19,554 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2021-06-05 03:51:19,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:19,554 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2021-06-05 03:51:19,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:51:19,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:19,555 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:19,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 03:51:19,555 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:19,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:19,555 INFO L82 PathProgramCache]: Analyzing trace with hash 467311611, now seen corresponding path program 1 times [2021-06-05 03:51:19,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:19,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18156539] [2021-06-05 03:51:19,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:19,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:19,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:19,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18156539] [2021-06-05 03:51:19,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18156539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:19,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583216200] [2021-06-05 03:51:19,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:19,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:51:19,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:19,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583216200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:19,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:19,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 03:51:19,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977694176] [2021-06-05 03:51:19,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:51:19,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:19,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:51:19,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:51:19,695 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:19,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:19,741 INFO L93 Difference]: Finished difference Result 61 states and 113 transitions. [2021-06-05 03:51:19,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:51:19,741 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 03:51:19,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:19,742 INFO L225 Difference]: With dead ends: 61 [2021-06-05 03:51:19,742 INFO L226 Difference]: Without dead ends: 54 [2021-06-05 03:51:19,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:51:19,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-06-05 03:51:19,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2021-06-05 03:51:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.94) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:19,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 97 transitions. [2021-06-05 03:51:19,743 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 97 transitions. Word has length 15 [2021-06-05 03:51:19,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:19,743 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 97 transitions. [2021-06-05 03:51:19,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:19,743 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 97 transitions. [2021-06-05 03:51:19,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:51:19,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:19,744 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:19,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:19,962 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:19,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:19,962 INFO L82 PathProgramCache]: Analyzing trace with hash 338569023, now seen corresponding path program 2 times [2021-06-05 03:51:19,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:19,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096726600] [2021-06-05 03:51:19,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:19,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:20,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:20,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096726600] [2021-06-05 03:51:20,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096726600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:20,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317826604] [2021-06-05 03:51:20,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:20,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:20,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:20,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:51:20,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:20,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:20,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317826604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:20,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:20,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 03:51:20,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217822273] [2021-06-05 03:51:20,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:51:20,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:20,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:51:20,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:51:20,173 INFO L87 Difference]: Start difference. First operand 51 states and 97 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:20,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:20,232 INFO L93 Difference]: Finished difference Result 76 states and 137 transitions. [2021-06-05 03:51:20,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:51:20,233 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 03:51:20,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:20,233 INFO L225 Difference]: With dead ends: 76 [2021-06-05 03:51:20,233 INFO L226 Difference]: Without dead ends: 69 [2021-06-05 03:51:20,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:51:20,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-05 03:51:20,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2021-06-05 03:51:20,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:20,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2021-06-05 03:51:20,236 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 15 [2021-06-05 03:51:20,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:20,236 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2021-06-05 03:51:20,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:20,236 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2021-06-05 03:51:20,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:51:20,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:20,236 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:20,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 03:51:20,452 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:20,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:20,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1953271747, now seen corresponding path program 3 times [2021-06-05 03:51:20,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:20,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797638604] [2021-06-05 03:51:20,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:20,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:20,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797638604] [2021-06-05 03:51:20,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797638604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:20,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853433260] [2021-06-05 03:51:20,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:20,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:51:20,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:20,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:51:20,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:20,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853433260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:20,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:20,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 03:51:20,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951861453] [2021-06-05 03:51:20,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:51:20,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:20,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:51:20,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:51:20,630 INFO L87 Difference]: Start difference. First operand 52 states and 101 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:20,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:20,680 INFO L93 Difference]: Finished difference Result 64 states and 119 transitions. [2021-06-05 03:51:20,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:51:20,680 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 03:51:20,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:20,680 INFO L225 Difference]: With dead ends: 64 [2021-06-05 03:51:20,680 INFO L226 Difference]: Without dead ends: 57 [2021-06-05 03:51:20,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:51:20,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-06-05 03:51:20,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2021-06-05 03:51:20,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:20,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2021-06-05 03:51:20,682 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 15 [2021-06-05 03:51:20,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:20,682 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2021-06-05 03:51:20,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:20,683 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2021-06-05 03:51:20,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:51:20,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:20,683 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:20,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:20,885 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:20,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:20,885 INFO L82 PathProgramCache]: Analyzing trace with hash -713510149, now seen corresponding path program 4 times [2021-06-05 03:51:20,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:20,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587049426] [2021-06-05 03:51:20,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:20,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:20,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:20,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587049426] [2021-06-05 03:51:20,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587049426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:20,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303904295] [2021-06-05 03:51:20,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:20,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:51:20,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:20,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:51:20,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:21,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303904295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:21,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:21,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 03:51:21,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798240409] [2021-06-05 03:51:21,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:51:21,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:21,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:51:21,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:51:21,050 INFO L87 Difference]: Start difference. First operand 52 states and 101 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:21,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:21,107 INFO L93 Difference]: Finished difference Result 80 states and 148 transitions. [2021-06-05 03:51:21,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:51:21,107 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 03:51:21,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:21,109 INFO L225 Difference]: With dead ends: 80 [2021-06-05 03:51:21,109 INFO L226 Difference]: Without dead ends: 73 [2021-06-05 03:51:21,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:51:21,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-06-05 03:51:21,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 55. [2021-06-05 03:51:21,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:21,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 111 transitions. [2021-06-05 03:51:21,111 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 111 transitions. Word has length 15 [2021-06-05 03:51:21,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:21,111 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 111 transitions. [2021-06-05 03:51:21,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:21,111 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 111 transitions. [2021-06-05 03:51:21,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:51:21,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:21,113 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:21,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:21,333 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:21,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:21,333 INFO L82 PathProgramCache]: Analyzing trace with hash 901192575, now seen corresponding path program 5 times [2021-06-05 03:51:21,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:21,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953639844] [2021-06-05 03:51:21,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:21,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:21,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:21,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953639844] [2021-06-05 03:51:21,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953639844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:21,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199173646] [2021-06-05 03:51:21,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:21,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:21,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:21,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:51:21,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:21,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:21,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199173646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:21,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:21,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 03:51:21,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058594832] [2021-06-05 03:51:21,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:51:21,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:21,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:51:21,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:51:21,509 INFO L87 Difference]: Start difference. First operand 55 states and 111 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:21,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:21,561 INFO L93 Difference]: Finished difference Result 82 states and 150 transitions. [2021-06-05 03:51:21,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:51:21,561 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 03:51:21,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:21,562 INFO L225 Difference]: With dead ends: 82 [2021-06-05 03:51:21,562 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 03:51:21,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:51:21,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 03:51:21,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2021-06-05 03:51:21,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:21,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 107 transitions. [2021-06-05 03:51:21,564 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 107 transitions. Word has length 15 [2021-06-05 03:51:21,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:21,564 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 107 transitions. [2021-06-05 03:51:21,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:21,565 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 107 transitions. [2021-06-05 03:51:21,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:51:21,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:21,565 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:21,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 03:51:21,783 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:21,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:21,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1178101253, now seen corresponding path program 6 times [2021-06-05 03:51:21,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:21,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363711500] [2021-06-05 03:51:21,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:21,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:21,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363711500] [2021-06-05 03:51:21,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363711500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:21,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363112354] [2021-06-05 03:51:21,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:21,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 03:51:21,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:21,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:51:21,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:21,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363112354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:21,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:21,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 03:51:21,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140845909] [2021-06-05 03:51:21,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:51:21,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:21,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:51:21,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:51:21,937 INFO L87 Difference]: Start difference. First operand 54 states and 107 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:21,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:21,987 INFO L93 Difference]: Finished difference Result 67 states and 126 transitions. [2021-06-05 03:51:21,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:51:21,987 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 03:51:21,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:21,987 INFO L225 Difference]: With dead ends: 67 [2021-06-05 03:51:21,987 INFO L226 Difference]: Without dead ends: 60 [2021-06-05 03:51:21,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:51:21,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-06-05 03:51:21,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2021-06-05 03:51:21,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:21,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 113 transitions. [2021-06-05 03:51:21,989 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 113 transitions. Word has length 15 [2021-06-05 03:51:21,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:21,989 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 113 transitions. [2021-06-05 03:51:21,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:21,989 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 113 transitions. [2021-06-05 03:51:21,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:51:21,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:21,989 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:22,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:22,206 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:22,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:22,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1628385307, now seen corresponding path program 7 times [2021-06-05 03:51:22,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:22,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547963076] [2021-06-05 03:51:22,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:22,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:22,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547963076] [2021-06-05 03:51:22,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547963076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:22,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201804754] [2021-06-05 03:51:22,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:22,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:22,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:51:22,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:22,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:22,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201804754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:22,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:22,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 03:51:22,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093823036] [2021-06-05 03:51:22,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:51:22,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:22,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:51:22,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:51:22,296 INFO L87 Difference]: Start difference. First operand 58 states and 113 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:22,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:22,349 INFO L93 Difference]: Finished difference Result 84 states and 155 transitions. [2021-06-05 03:51:22,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:51:22,349 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 03:51:22,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:22,350 INFO L225 Difference]: With dead ends: 84 [2021-06-05 03:51:22,350 INFO L226 Difference]: Without dead ends: 73 [2021-06-05 03:51:22,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:51:22,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-06-05 03:51:22,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2021-06-05 03:51:22,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 52 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:22,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 103 transitions. [2021-06-05 03:51:22,353 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 103 transitions. Word has length 16 [2021-06-05 03:51:22,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:22,353 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 103 transitions. [2021-06-05 03:51:22,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:22,353 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 103 transitions. [2021-06-05 03:51:22,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:51:22,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:22,354 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:22,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:22,573 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:22,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:22,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1405744629, now seen corresponding path program 8 times [2021-06-05 03:51:22,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:22,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463402404] [2021-06-05 03:51:22,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:22,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:22,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463402404] [2021-06-05 03:51:22,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463402404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:22,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011508418] [2021-06-05 03:51:22,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:22,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:22,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:22,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:51:22,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:22,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011508418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:22,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:22,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 03:51:22,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908540511] [2021-06-05 03:51:22,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:51:22,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:22,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:51:22,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:51:22,670 INFO L87 Difference]: Start difference. First operand 53 states and 103 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:22,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:22,718 INFO L93 Difference]: Finished difference Result 81 states and 154 transitions. [2021-06-05 03:51:22,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:51:22,718 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 03:51:22,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:22,718 INFO L225 Difference]: With dead ends: 81 [2021-06-05 03:51:22,719 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 03:51:22,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:51:22,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 03:51:22,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2021-06-05 03:51:22,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.0) internal successors, (106), 53 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:22,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 106 transitions. [2021-06-05 03:51:22,720 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 106 transitions. Word has length 16 [2021-06-05 03:51:22,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:22,720 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 106 transitions. [2021-06-05 03:51:22,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:22,720 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 106 transitions. [2021-06-05 03:51:22,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:51:22,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:22,721 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:22,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 03:51:22,937 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:22,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:22,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1226449649, now seen corresponding path program 9 times [2021-06-05 03:51:22,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:22,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924126399] [2021-06-05 03:51:22,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:22,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:22,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924126399] [2021-06-05 03:51:22,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924126399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:22,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204208178] [2021-06-05 03:51:22,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:22,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:51:22,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:22,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:51:22,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:23,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:23,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204208178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:23,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:23,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 03:51:23,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48488810] [2021-06-05 03:51:23,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:51:23,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:23,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:51:23,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:51:23,040 INFO L87 Difference]: Start difference. First operand 54 states and 106 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:23,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:23,130 INFO L93 Difference]: Finished difference Result 154 states and 282 transitions. [2021-06-05 03:51:23,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:51:23,130 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 03:51:23,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:23,132 INFO L225 Difference]: With dead ends: 154 [2021-06-05 03:51:23,132 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 03:51:23,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:51:23,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 03:51:23,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 62. [2021-06-05 03:51:23,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1639344262295084) internal successors, (132), 61 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:23,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 132 transitions. [2021-06-05 03:51:23,136 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 132 transitions. Word has length 16 [2021-06-05 03:51:23,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:23,136 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 132 transitions. [2021-06-05 03:51:23,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:23,136 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 132 transitions. [2021-06-05 03:51:23,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:51:23,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:23,136 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:23,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 03:51:23,353 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:23,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:23,353 INFO L82 PathProgramCache]: Analyzing trace with hash -654994843, now seen corresponding path program 10 times [2021-06-05 03:51:23,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:23,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584813781] [2021-06-05 03:51:23,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:23,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:23,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:23,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584813781] [2021-06-05 03:51:23,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584813781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:23,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082419469] [2021-06-05 03:51:23,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:23,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:51:23,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:23,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:51:23,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:23,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082419469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:23,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:23,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 03:51:23,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344016746] [2021-06-05 03:51:23,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:51:23,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:23,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:51:23,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:51:23,442 INFO L87 Difference]: Start difference. First operand 62 states and 132 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:23,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:23,571 INFO L93 Difference]: Finished difference Result 157 states and 283 transitions. [2021-06-05 03:51:23,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:51:23,572 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 03:51:23,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:23,573 INFO L225 Difference]: With dead ends: 157 [2021-06-05 03:51:23,573 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 03:51:23,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:51:23,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 03:51:23,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 63. [2021-06-05 03:51:23,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:23,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 130 transitions. [2021-06-05 03:51:23,576 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 130 transitions. Word has length 16 [2021-06-05 03:51:23,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:23,576 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 130 transitions. [2021-06-05 03:51:23,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:23,576 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 130 transitions. [2021-06-05 03:51:23,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:51:23,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:23,577 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:23,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 03:51:23,785 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:23,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:23,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1708400907, now seen corresponding path program 11 times [2021-06-05 03:51:23,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:23,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333777842] [2021-06-05 03:51:23,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:23,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:23,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:23,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333777842] [2021-06-05 03:51:23,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333777842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:23,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178510761] [2021-06-05 03:51:23,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:51:23,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:23,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:23,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:51:23,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:23,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178510761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:23,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:23,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 03:51:23,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97273154] [2021-06-05 03:51:23,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:51:23,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:23,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:51:23,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:51:23,889 INFO L87 Difference]: Start difference. First operand 63 states and 130 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:23,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:23,977 INFO L93 Difference]: Finished difference Result 160 states and 307 transitions. [2021-06-05 03:51:23,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:51:23,978 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 03:51:23,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:23,978 INFO L225 Difference]: With dead ends: 160 [2021-06-05 03:51:23,978 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 03:51:23,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:51:23,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 03:51:23,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 70. [2021-06-05 03:51:23,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.217391304347826) internal successors, (153), 69 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:23,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 153 transitions. [2021-06-05 03:51:23,981 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 153 transitions. Word has length 16 [2021-06-05 03:51:23,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:23,981 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 153 transitions. [2021-06-05 03:51:23,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:23,981 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 153 transitions. [2021-06-05 03:51:23,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:51:23,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:23,981 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:24,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:24,197 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:24,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:24,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1243809803, now seen corresponding path program 12 times [2021-06-05 03:51:24,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:24,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922355732] [2021-06-05 03:51:24,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:24,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:24,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922355732] [2021-06-05 03:51:24,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922355732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:24,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087813024] [2021-06-05 03:51:24,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:24,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:51:24,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:24,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:51:24,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:24,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087813024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:24,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:24,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 03:51:24,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415174511] [2021-06-05 03:51:24,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:51:24,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:24,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:51:24,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:51:24,290 INFO L87 Difference]: Start difference. First operand 70 states and 153 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:24,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:24,415 INFO L93 Difference]: Finished difference Result 114 states and 223 transitions. [2021-06-05 03:51:24,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:51:24,416 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 03:51:24,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:24,416 INFO L225 Difference]: With dead ends: 114 [2021-06-05 03:51:24,416 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 03:51:24,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:51:24,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 03:51:24,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 72. [2021-06-05 03:51:24,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.183098591549296) internal successors, (155), 71 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:24,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 155 transitions. [2021-06-05 03:51:24,420 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 155 transitions. Word has length 16 [2021-06-05 03:51:24,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:24,420 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 155 transitions. [2021-06-05 03:51:24,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:24,420 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 155 transitions. [2021-06-05 03:51:24,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:51:24,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:24,421 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:24,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 03:51:24,629 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:24,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:24,629 INFO L82 PathProgramCache]: Analyzing trace with hash -119765041, now seen corresponding path program 13 times [2021-06-05 03:51:24,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:24,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440313051] [2021-06-05 03:51:24,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:24,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:24,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440313051] [2021-06-05 03:51:24,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440313051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:24,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917396129] [2021-06-05 03:51:24,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:24,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:24,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:51:24,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:24,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917396129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:24,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:24,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 03:51:24,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598367979] [2021-06-05 03:51:24,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:51:24,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:24,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:51:24,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:51:24,729 INFO L87 Difference]: Start difference. First operand 72 states and 155 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:24,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:24,836 INFO L93 Difference]: Finished difference Result 132 states and 247 transitions. [2021-06-05 03:51:24,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:51:24,839 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 03:51:24,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:24,839 INFO L225 Difference]: With dead ends: 132 [2021-06-05 03:51:24,839 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 03:51:24,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:51:24,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 03:51:24,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2021-06-05 03:51:24,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.1549295774647885) internal successors, (153), 71 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:24,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 153 transitions. [2021-06-05 03:51:24,841 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 153 transitions. Word has length 16 [2021-06-05 03:51:24,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:24,842 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 153 transitions. [2021-06-05 03:51:24,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:24,842 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 153 transitions. [2021-06-05 03:51:24,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:51:24,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:24,842 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:25,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 03:51:25,049 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:25,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:25,049 INFO L82 PathProgramCache]: Analyzing trace with hash -841282353, now seen corresponding path program 14 times [2021-06-05 03:51:25,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:25,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823672998] [2021-06-05 03:51:25,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:25,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:25,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823672998] [2021-06-05 03:51:25,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823672998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:25,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3570097] [2021-06-05 03:51:25,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:25,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:25,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:25,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:51:25,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:25,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:25,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3570097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:25,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:25,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 03:51:25,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116747362] [2021-06-05 03:51:25,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:51:25,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:25,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:51:25,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:51:25,184 INFO L87 Difference]: Start difference. First operand 72 states and 153 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:25,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:25,266 INFO L93 Difference]: Finished difference Result 186 states and 367 transitions. [2021-06-05 03:51:25,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:51:25,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 03:51:25,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:25,267 INFO L225 Difference]: With dead ends: 186 [2021-06-05 03:51:25,267 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 03:51:25,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:51:25,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 03:51:25,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 84. [2021-06-05 03:51:25,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.3132530120481927) internal successors, (192), 83 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:25,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 192 transitions. [2021-06-05 03:51:25,270 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 192 transitions. Word has length 16 [2021-06-05 03:51:25,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:25,270 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 192 transitions. [2021-06-05 03:51:25,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:25,270 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 192 transitions. [2021-06-05 03:51:25,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:51:25,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:25,270 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:25,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 03:51:25,477 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:25,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:25,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1305873457, now seen corresponding path program 15 times [2021-06-05 03:51:25,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:25,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623840802] [2021-06-05 03:51:25,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:25,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:25,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623840802] [2021-06-05 03:51:25,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623840802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:25,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203956041] [2021-06-05 03:51:25,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:25,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 03:51:25,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:25,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:51:25,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:25,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203956041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:25,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:25,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 03:51:25,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806460303] [2021-06-05 03:51:25,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:51:25,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:25,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:51:25,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:51:25,585 INFO L87 Difference]: Start difference. First operand 84 states and 192 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:25,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:25,729 INFO L93 Difference]: Finished difference Result 157 states and 310 transitions. [2021-06-05 03:51:25,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:51:25,729 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 03:51:25,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:25,730 INFO L225 Difference]: With dead ends: 157 [2021-06-05 03:51:25,730 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 03:51:25,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:51:25,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 03:51:25,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 84. [2021-06-05 03:51:25,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:25,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 191 transitions. [2021-06-05 03:51:25,732 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 191 transitions. Word has length 16 [2021-06-05 03:51:25,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:25,732 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 191 transitions. [2021-06-05 03:51:25,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:25,732 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 191 transitions. [2021-06-05 03:51:25,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:51:25,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:25,732 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:25,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 03:51:25,933 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:25,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:25,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1339472685, now seen corresponding path program 16 times [2021-06-05 03:51:25,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:25,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977766227] [2021-06-05 03:51:25,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:25,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:25,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977766227] [2021-06-05 03:51:25,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977766227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:25,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130709754] [2021-06-05 03:51:25,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:25,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:51:25,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:25,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:51:25,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:26,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130709754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:26,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:26,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 03:51:26,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142537177] [2021-06-05 03:51:26,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:51:26,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:26,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:51:26,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:51:26,041 INFO L87 Difference]: Start difference. First operand 84 states and 191 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:26,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:26,205 INFO L93 Difference]: Finished difference Result 146 states and 304 transitions. [2021-06-05 03:51:26,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:51:26,205 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 03:51:26,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:26,205 INFO L225 Difference]: With dead ends: 146 [2021-06-05 03:51:26,205 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 03:51:26,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:51:26,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 03:51:26,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 94. [2021-06-05 03:51:26,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.3655913978494625) internal successors, (220), 93 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:26,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 220 transitions. [2021-06-05 03:51:26,208 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 220 transitions. Word has length 16 [2021-06-05 03:51:26,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:26,208 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 220 transitions. [2021-06-05 03:51:26,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:26,208 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 220 transitions. [2021-06-05 03:51:26,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:51:26,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:26,208 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:26,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:26,424 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:26,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:26,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1363701933, now seen corresponding path program 17 times [2021-06-05 03:51:26,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:26,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100748400] [2021-06-05 03:51:26,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:26,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:26,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100748400] [2021-06-05 03:51:26,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100748400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:26,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494686044] [2021-06-05 03:51:26,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:26,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:51:26,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:26,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:51:26,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:26,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494686044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:26,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:26,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 03:51:26,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571509153] [2021-06-05 03:51:26,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:51:26,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:26,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:51:26,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:51:26,506 INFO L87 Difference]: Start difference. First operand 94 states and 220 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:26,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:26,553 INFO L93 Difference]: Finished difference Result 128 states and 284 transitions. [2021-06-05 03:51:26,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:51:26,554 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 03:51:26,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:26,555 INFO L225 Difference]: With dead ends: 128 [2021-06-05 03:51:26,555 INFO L226 Difference]: Without dead ends: 128 [2021-06-05 03:51:26,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:51:26,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-05 03:51:26,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2021-06-05 03:51:26,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.391304347826087) internal successors, (220), 92 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:26,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 220 transitions. [2021-06-05 03:51:26,557 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 220 transitions. Word has length 16 [2021-06-05 03:51:26,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:26,557 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 220 transitions. [2021-06-05 03:51:26,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:26,557 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 220 transitions. [2021-06-05 03:51:26,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:51:26,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:26,557 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:26,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 03:51:26,761 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:26,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:26,762 INFO L82 PathProgramCache]: Analyzing trace with hash -351009401, now seen corresponding path program 18 times [2021-06-05 03:51:26,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:26,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573779166] [2021-06-05 03:51:26,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:26,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:26,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:26,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573779166] [2021-06-05 03:51:26,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573779166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:26,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420425605] [2021-06-05 03:51:26,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:26,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:51:26,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:26,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:51:26,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:26,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:26,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420425605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:26,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:26,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 03:51:26,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136929320] [2021-06-05 03:51:26,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:51:26,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:26,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:51:26,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:51:26,856 INFO L87 Difference]: Start difference. First operand 93 states and 220 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:26,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:26,940 INFO L93 Difference]: Finished difference Result 128 states and 288 transitions. [2021-06-05 03:51:26,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:51:26,941 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 03:51:26,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:26,941 INFO L225 Difference]: With dead ends: 128 [2021-06-05 03:51:26,941 INFO L226 Difference]: Without dead ends: 128 [2021-06-05 03:51:26,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:51:26,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-05 03:51:26,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2021-06-05 03:51:26,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.422680412371134) internal successors, (235), 97 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:26,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 235 transitions. [2021-06-05 03:51:26,946 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 235 transitions. Word has length 16 [2021-06-05 03:51:26,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:26,946 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 235 transitions. [2021-06-05 03:51:26,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:26,946 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 235 transitions. [2021-06-05 03:51:26,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:51:26,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:26,946 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:27,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 03:51:27,153 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:27,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:27,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1795161359, now seen corresponding path program 19 times [2021-06-05 03:51:27,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:27,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36809080] [2021-06-05 03:51:27,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:27,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:27,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36809080] [2021-06-05 03:51:27,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36809080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:27,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709275510] [2021-06-05 03:51:27,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:51:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:27,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:51:27,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:27,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709275510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:27,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:27,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 03:51:27,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577733938] [2021-06-05 03:51:27,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:51:27,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:27,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:51:27,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:51:27,254 INFO L87 Difference]: Start difference. First operand 98 states and 235 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:27,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:27,350 INFO L93 Difference]: Finished difference Result 175 states and 369 transitions. [2021-06-05 03:51:27,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:51:27,354 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 03:51:27,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:27,354 INFO L225 Difference]: With dead ends: 175 [2021-06-05 03:51:27,354 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 03:51:27,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:51:27,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 03:51:27,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 101. [2021-06-05 03:51:27,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.46) internal successors, (246), 100 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:27,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 246 transitions. [2021-06-05 03:51:27,357 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 246 transitions. Word has length 16 [2021-06-05 03:51:27,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:27,357 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 246 transitions. [2021-06-05 03:51:27,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:27,357 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 246 transitions. [2021-06-05 03:51:27,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:51:27,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:27,357 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:27,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:27,558 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:27,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:27,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1928351131, now seen corresponding path program 20 times [2021-06-05 03:51:27,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:27,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832440942] [2021-06-05 03:51:27,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:27,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:27,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832440942] [2021-06-05 03:51:27,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832440942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:27,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470594393] [2021-06-05 03:51:27,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:27,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:27,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:27,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:51:27,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:27,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470594393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:27,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:27,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 03:51:27,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304112018] [2021-06-05 03:51:27,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:51:27,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:27,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:51:27,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:51:27,641 INFO L87 Difference]: Start difference. First operand 101 states and 246 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:27,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:27,750 INFO L93 Difference]: Finished difference Result 143 states and 309 transitions. [2021-06-05 03:51:27,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:51:27,750 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 03:51:27,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:27,751 INFO L225 Difference]: With dead ends: 143 [2021-06-05 03:51:27,751 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 03:51:27,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:51:27,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 03:51:27,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2021-06-05 03:51:27,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.4329896907216493) internal successors, (236), 97 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 236 transitions. [2021-06-05 03:51:27,753 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 236 transitions. Word has length 16 [2021-06-05 03:51:27,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:27,753 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 236 transitions. [2021-06-05 03:51:27,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:27,753 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 236 transitions. [2021-06-05 03:51:27,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:51:27,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:27,754 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:27,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 03:51:27,970 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:27,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:27,970 INFO L82 PathProgramCache]: Analyzing trace with hash 435044619, now seen corresponding path program 21 times [2021-06-05 03:51:27,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:27,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355805370] [2021-06-05 03:51:27,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:27,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:27,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:27,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355805370] [2021-06-05 03:51:27,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355805370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:27,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989434920] [2021-06-05 03:51:27,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:28,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:51:28,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:28,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:51:28,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:28,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989434920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:28,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:28,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 03:51:28,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409183408] [2021-06-05 03:51:28,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:51:28,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:28,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:51:28,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:51:28,055 INFO L87 Difference]: Start difference. First operand 98 states and 236 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:28,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:28,133 INFO L93 Difference]: Finished difference Result 189 states and 398 transitions. [2021-06-05 03:51:28,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:51:28,134 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 03:51:28,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:28,134 INFO L225 Difference]: With dead ends: 189 [2021-06-05 03:51:28,134 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 03:51:28,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:51:28,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 03:51:28,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 106. [2021-06-05 03:51:28,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.5047619047619047) internal successors, (263), 105 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:28,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 263 transitions. [2021-06-05 03:51:28,139 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 263 transitions. Word has length 16 [2021-06-05 03:51:28,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:28,139 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 263 transitions. [2021-06-05 03:51:28,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:28,139 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 263 transitions. [2021-06-05 03:51:28,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:51:28,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:28,139 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:28,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:28,353 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:28,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:28,353 INFO L82 PathProgramCache]: Analyzing trace with hash -29546485, now seen corresponding path program 22 times [2021-06-05 03:51:28,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:28,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417695847] [2021-06-05 03:51:28,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:28,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:28,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:28,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417695847] [2021-06-05 03:51:28,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417695847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:28,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842561900] [2021-06-05 03:51:28,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:28,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:51:28,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:28,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:51:28,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:28,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:28,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842561900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:28,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:28,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 03:51:28,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684613348] [2021-06-05 03:51:28,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:51:28,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:28,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:51:28,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:51:28,431 INFO L87 Difference]: Start difference. First operand 106 states and 263 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:28,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:28,559 INFO L93 Difference]: Finished difference Result 179 states and 382 transitions. [2021-06-05 03:51:28,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:51:28,560 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 03:51:28,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:28,560 INFO L225 Difference]: With dead ends: 179 [2021-06-05 03:51:28,560 INFO L226 Difference]: Without dead ends: 177 [2021-06-05 03:51:28,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:51:28,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-05 03:51:28,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 101. [2021-06-05 03:51:28,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.44) internal successors, (244), 100 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:28,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 244 transitions. [2021-06-05 03:51:28,563 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 244 transitions. Word has length 16 [2021-06-05 03:51:28,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:28,563 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 244 transitions. [2021-06-05 03:51:28,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:28,563 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 244 transitions. [2021-06-05 03:51:28,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:51:28,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:28,563 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:28,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 03:51:28,764 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:28,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:28,764 INFO L82 PathProgramCache]: Analyzing trace with hash -63145713, now seen corresponding path program 23 times [2021-06-05 03:51:28,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:28,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095313481] [2021-06-05 03:51:28,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:28,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:28,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:28,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095313481] [2021-06-05 03:51:28,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095313481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:28,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466518552] [2021-06-05 03:51:28,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:28,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:28,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:28,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:51:28,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:28,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466518552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:28,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:28,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 03:51:28,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336886821] [2021-06-05 03:51:28,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:51:28,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:28,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:51:28,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:51:28,855 INFO L87 Difference]: Start difference. First operand 101 states and 244 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:28,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:28,956 INFO L93 Difference]: Finished difference Result 150 states and 322 transitions. [2021-06-05 03:51:28,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:51:28,957 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 03:51:28,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:28,957 INFO L225 Difference]: With dead ends: 150 [2021-06-05 03:51:28,957 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 03:51:28,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:51:28,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 03:51:28,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 101. [2021-06-05 03:51:28,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.42) internal successors, (242), 100 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:28,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 242 transitions. [2021-06-05 03:51:28,960 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 242 transitions. Word has length 16 [2021-06-05 03:51:28,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:28,960 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 242 transitions. [2021-06-05 03:51:28,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:28,960 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 242 transitions. [2021-06-05 03:51:28,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:51:28,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:28,960 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:29,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 03:51:29,173 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:29,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:29,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1083715573, now seen corresponding path program 24 times [2021-06-05 03:51:29,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:29,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328276903] [2021-06-05 03:51:29,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:29,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:29,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328276903] [2021-06-05 03:51:29,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328276903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:29,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918579243] [2021-06-05 03:51:29,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:29,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 03:51:29,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:29,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:51:29,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:29,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:29,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918579243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:29,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:29,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 03:51:29,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251866393] [2021-06-05 03:51:29,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:51:29,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:29,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:51:29,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:51:29,265 INFO L87 Difference]: Start difference. First operand 101 states and 242 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:29,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:29,301 INFO L93 Difference]: Finished difference Result 114 states and 266 transitions. [2021-06-05 03:51:29,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:51:29,302 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 03:51:29,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:29,302 INFO L225 Difference]: With dead ends: 114 [2021-06-05 03:51:29,302 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 03:51:29,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:29,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 03:51:29,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2021-06-05 03:51:29,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.41) internal successors, (241), 100 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:29,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 241 transitions. [2021-06-05 03:51:29,304 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 241 transitions. Word has length 16 [2021-06-05 03:51:29,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:29,304 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 241 transitions. [2021-06-05 03:51:29,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:29,304 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 241 transitions. [2021-06-05 03:51:29,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:51:29,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:29,305 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:29,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 03:51:29,509 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:29,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:29,509 INFO L82 PathProgramCache]: Analyzing trace with hash 977688019, now seen corresponding path program 25 times [2021-06-05 03:51:29,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:29,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168805662] [2021-06-05 03:51:29,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:29,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:29,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:29,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:29,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168805662] [2021-06-05 03:51:29,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168805662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:29,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957284990] [2021-06-05 03:51:29,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:51:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:29,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:51:29,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:29,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957284990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:29,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:29,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 03:51:29,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955630674] [2021-06-05 03:51:29,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:51:29,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:29,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:51:29,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:51:29,595 INFO L87 Difference]: Start difference. First operand 101 states and 241 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:29,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:29,708 INFO L93 Difference]: Finished difference Result 167 states and 364 transitions. [2021-06-05 03:51:29,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:51:29,708 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 03:51:29,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:29,709 INFO L225 Difference]: With dead ends: 167 [2021-06-05 03:51:29,709 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 03:51:29,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:51:29,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 03:51:29,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 104. [2021-06-05 03:51:29,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.436893203883495) internal successors, (251), 103 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:29,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 251 transitions. [2021-06-05 03:51:29,711 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 251 transitions. Word has length 16 [2021-06-05 03:51:29,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:29,711 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 251 transitions. [2021-06-05 03:51:29,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:29,711 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 251 transitions. [2021-06-05 03:51:29,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:51:29,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:29,712 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:29,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:29,921 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:29,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:29,921 INFO L82 PathProgramCache]: Analyzing trace with hash 935675603, now seen corresponding path program 26 times [2021-06-05 03:51:29,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:29,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58921865] [2021-06-05 03:51:29,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:29,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:29,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58921865] [2021-06-05 03:51:29,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58921865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:29,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665388885] [2021-06-05 03:51:29,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:29,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:29,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:29,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:51:29,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:30,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:30,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665388885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:30,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:30,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 03:51:30,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575212720] [2021-06-05 03:51:30,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:51:30,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:30,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:51:30,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:51:30,010 INFO L87 Difference]: Start difference. First operand 104 states and 251 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:30,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:30,092 INFO L93 Difference]: Finished difference Result 217 states and 462 transitions. [2021-06-05 03:51:30,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:51:30,092 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 03:51:30,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:30,093 INFO L225 Difference]: With dead ends: 217 [2021-06-05 03:51:30,093 INFO L226 Difference]: Without dead ends: 217 [2021-06-05 03:51:30,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:51:30,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-05 03:51:30,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 115. [2021-06-05 03:51:30,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.526315789473684) internal successors, (288), 114 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:30,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2021-06-05 03:51:30,096 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 16 [2021-06-05 03:51:30,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:30,096 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2021-06-05 03:51:30,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:30,096 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2021-06-05 03:51:30,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:51:30,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:30,096 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:30,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 03:51:30,305 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:30,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:30,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1507130409, now seen corresponding path program 27 times [2021-06-05 03:51:30,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:30,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616190678] [2021-06-05 03:51:30,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:30,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:30,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:30,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616190678] [2021-06-05 03:51:30,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616190678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:30,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761054055] [2021-06-05 03:51:30,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:30,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 03:51:30,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:30,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:51:30,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:30,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761054055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:30,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:30,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 03:51:30,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4124691] [2021-06-05 03:51:30,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:51:30,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:30,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:51:30,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:51:30,415 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:30,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:30,529 INFO L93 Difference]: Finished difference Result 201 states and 430 transitions. [2021-06-05 03:51:30,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:51:30,529 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 03:51:30,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:30,530 INFO L225 Difference]: With dead ends: 201 [2021-06-05 03:51:30,530 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 03:51:30,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:51:30,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 03:51:30,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 109. [2021-06-05 03:51:30,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.4537037037037037) internal successors, (265), 108 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:30,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 265 transitions. [2021-06-05 03:51:30,533 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 265 transitions. Word has length 16 [2021-06-05 03:51:30,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:30,533 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 265 transitions. [2021-06-05 03:51:30,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:30,533 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 265 transitions. [2021-06-05 03:51:30,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 03:51:30,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:30,534 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:30,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:30,749 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:30,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:30,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2042360211, now seen corresponding path program 28 times [2021-06-05 03:51:30,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:30,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844481200] [2021-06-05 03:51:30,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:30,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:30,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:30,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844481200] [2021-06-05 03:51:30,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844481200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:30,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104124037] [2021-06-05 03:51:30,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:30,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:51:30,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:30,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:51:30,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:30,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:30,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104124037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:30,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:30,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 03:51:30,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874207825] [2021-06-05 03:51:30,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:51:30,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:30,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:51:30,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:51:30,834 INFO L87 Difference]: Start difference. First operand 109 states and 265 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:30,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:30,969 INFO L93 Difference]: Finished difference Result 183 states and 400 transitions. [2021-06-05 03:51:30,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:51:30,971 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 03:51:30,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:30,972 INFO L225 Difference]: With dead ends: 183 [2021-06-05 03:51:30,972 INFO L226 Difference]: Without dead ends: 177 [2021-06-05 03:51:30,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:51:30,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-05 03:51:30,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 122. [2021-06-05 03:51:30,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.4958677685950414) internal successors, (302), 121 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:30,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 302 transitions. [2021-06-05 03:51:30,974 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 302 transitions. Word has length 16 [2021-06-05 03:51:30,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:30,975 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 302 transitions. [2021-06-05 03:51:30,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:30,975 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 302 transitions. [2021-06-05 03:51:30,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:51:30,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:30,975 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:31,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:31,191 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:31,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:31,191 INFO L82 PathProgramCache]: Analyzing trace with hash -601783285, now seen corresponding path program 29 times [2021-06-05 03:51:31,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:31,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069677362] [2021-06-05 03:51:31,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:31,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:31,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:31,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069677362] [2021-06-05 03:51:31,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069677362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:31,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440890062] [2021-06-05 03:51:31,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:31,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:31,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:31,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:51:31,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:31,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:31,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440890062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:31,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:31,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 03:51:31,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228728515] [2021-06-05 03:51:31,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:51:31,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:31,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:51:31,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:51:31,347 INFO L87 Difference]: Start difference. First operand 122 states and 302 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:31,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:31,498 INFO L93 Difference]: Finished difference Result 223 states and 473 transitions. [2021-06-05 03:51:31,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:51:31,498 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:51:31,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:31,499 INFO L225 Difference]: With dead ends: 223 [2021-06-05 03:51:31,499 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 03:51:31,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:51:31,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 03:51:31,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2021-06-05 03:51:31,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.475177304964539) internal successors, (349), 141 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:31,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 349 transitions. [2021-06-05 03:51:31,502 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 349 transitions. Word has length 17 [2021-06-05 03:51:31,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:31,502 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 349 transitions. [2021-06-05 03:51:31,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:31,502 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 349 transitions. [2021-06-05 03:51:31,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:51:31,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:31,502 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:31,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 03:51:31,718 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:31,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:31,719 INFO L82 PathProgramCache]: Analyzing trace with hash 838349055, now seen corresponding path program 30 times [2021-06-05 03:51:31,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:31,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636093792] [2021-06-05 03:51:31,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:31,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:31,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636093792] [2021-06-05 03:51:31,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636093792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:31,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276926314] [2021-06-05 03:51:31,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:31,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:51:31,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:31,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:51:31,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:31,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276926314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:31,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:31,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 03:51:31,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288403298] [2021-06-05 03:51:31,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:51:31,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:31,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:51:31,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:51:31,892 INFO L87 Difference]: Start difference. First operand 142 states and 349 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:31,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:31,983 INFO L93 Difference]: Finished difference Result 253 states and 530 transitions. [2021-06-05 03:51:31,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:51:31,983 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:51:31,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:31,984 INFO L225 Difference]: With dead ends: 253 [2021-06-05 03:51:31,984 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 03:51:31,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:51:31,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 03:51:31,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 149. [2021-06-05 03:51:31,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.527027027027027) internal successors, (374), 148 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:31,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 374 transitions. [2021-06-05 03:51:31,987 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 374 transitions. Word has length 17 [2021-06-05 03:51:31,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:31,987 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 374 transitions. [2021-06-05 03:51:31,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:31,987 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 374 transitions. [2021-06-05 03:51:31,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:51:31,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:31,988 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:32,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 03:51:32,201 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:32,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:32,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1841915517, now seen corresponding path program 31 times [2021-06-05 03:51:32,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:32,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788871464] [2021-06-05 03:51:32,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:32,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:32,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:32,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788871464] [2021-06-05 03:51:32,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788871464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:32,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868084922] [2021-06-05 03:51:32,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:51:32,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:32,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:51:32,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:32,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868084922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:32,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:32,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 03:51:32,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780786563] [2021-06-05 03:51:32,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:51:32,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:32,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:51:32,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:51:32,379 INFO L87 Difference]: Start difference. First operand 149 states and 374 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:32,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:32,511 INFO L93 Difference]: Finished difference Result 239 states and 510 transitions. [2021-06-05 03:51:32,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:51:32,512 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:51:32,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:32,512 INFO L225 Difference]: With dead ends: 239 [2021-06-05 03:51:32,513 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 03:51:32,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 154.8ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:51:32,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 03:51:32,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 148. [2021-06-05 03:51:32,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.5238095238095237) internal successors, (371), 147 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:32,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 371 transitions. [2021-06-05 03:51:32,515 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 371 transitions. Word has length 17 [2021-06-05 03:51:32,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:32,516 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 371 transitions. [2021-06-05 03:51:32,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:32,516 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 371 transitions. [2021-06-05 03:51:32,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:51:32,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:32,516 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:32,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 03:51:32,717 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:32,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:32,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1409803861, now seen corresponding path program 32 times [2021-06-05 03:51:32,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:32,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046406762] [2021-06-05 03:51:32,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:32,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:32,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046406762] [2021-06-05 03:51:32,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046406762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:32,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440196330] [2021-06-05 03:51:32,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:32,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:32,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:32,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:51:32,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:32,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440196330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:32,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:32,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 03:51:32,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301551442] [2021-06-05 03:51:32,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:51:32,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:32,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:51:32,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:51:32,860 INFO L87 Difference]: Start difference. First operand 148 states and 371 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:32,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:32,983 INFO L93 Difference]: Finished difference Result 224 states and 484 transitions. [2021-06-05 03:51:32,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:51:32,983 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:51:32,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:32,984 INFO L225 Difference]: With dead ends: 224 [2021-06-05 03:51:32,984 INFO L226 Difference]: Without dead ends: 217 [2021-06-05 03:51:32,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:51:32,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-05 03:51:32,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 148. [2021-06-05 03:51:32,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.5238095238095237) internal successors, (371), 147 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:32,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 371 transitions. [2021-06-05 03:51:32,987 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 371 transitions. Word has length 17 [2021-06-05 03:51:32,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:32,987 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 371 transitions. [2021-06-05 03:51:32,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:32,988 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 371 transitions. [2021-06-05 03:51:32,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:51:32,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:32,988 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:33,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:33,188 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:33,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:33,189 INFO L82 PathProgramCache]: Analyzing trace with hash 437462331, now seen corresponding path program 33 times [2021-06-05 03:51:33,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:33,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754101680] [2021-06-05 03:51:33,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:33,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:33,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754101680] [2021-06-05 03:51:33,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754101680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:33,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906344041] [2021-06-05 03:51:33,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:33,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:51:33,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:33,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:51:33,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:33,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:33,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906344041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:33,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:33,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 03:51:33,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778004849] [2021-06-05 03:51:33,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:51:33,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:33,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:51:33,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:51:33,348 INFO L87 Difference]: Start difference. First operand 148 states and 371 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:33,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:33,427 INFO L93 Difference]: Finished difference Result 218 states and 492 transitions. [2021-06-05 03:51:33,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:51:33,428 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:51:33,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:33,428 INFO L225 Difference]: With dead ends: 218 [2021-06-05 03:51:33,428 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 03:51:33,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:33,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 03:51:33,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 157. [2021-06-05 03:51:33,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.551282051282051) internal successors, (398), 156 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:33,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 398 transitions. [2021-06-05 03:51:33,431 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 398 transitions. Word has length 17 [2021-06-05 03:51:33,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:33,431 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 398 transitions. [2021-06-05 03:51:33,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:33,432 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 398 transitions. [2021-06-05 03:51:33,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:51:33,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:33,432 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:33,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 03:51:33,645 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:33,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:33,645 INFO L82 PathProgramCache]: Analyzing trace with hash 2052165055, now seen corresponding path program 34 times [2021-06-05 03:51:33,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:33,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016899149] [2021-06-05 03:51:33,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:33,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:33,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016899149] [2021-06-05 03:51:33,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016899149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:33,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922318585] [2021-06-05 03:51:33,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:33,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:51:33,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:33,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:51:33,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:33,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:33,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922318585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:33,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:33,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 03:51:33,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036212588] [2021-06-05 03:51:33,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:51:33,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:33,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:51:33,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:51:33,797 INFO L87 Difference]: Start difference. First operand 157 states and 398 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:33,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:33,907 INFO L93 Difference]: Finished difference Result 220 states and 491 transitions. [2021-06-05 03:51:33,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:51:33,907 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:51:33,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:33,908 INFO L225 Difference]: With dead ends: 220 [2021-06-05 03:51:33,908 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 03:51:33,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:51:33,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 03:51:33,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 156. [2021-06-05 03:51:33,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.535483870967742) internal successors, (393), 155 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:33,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 393 transitions. [2021-06-05 03:51:33,911 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 393 transitions. Word has length 17 [2021-06-05 03:51:33,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:33,912 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 393 transitions. [2021-06-05 03:51:33,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:33,912 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 393 transitions. [2021-06-05 03:51:33,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:51:33,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:33,912 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:34,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 03:51:34,125 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:34,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:34,125 INFO L82 PathProgramCache]: Analyzing trace with hash -27128773, now seen corresponding path program 35 times [2021-06-05 03:51:34,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:34,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090520191] [2021-06-05 03:51:34,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:34,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:34,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090520191] [2021-06-05 03:51:34,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090520191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:34,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663680650] [2021-06-05 03:51:34,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:34,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:51:34,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:34,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:51:34,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:34,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:34,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663680650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:34,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:34,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 03:51:34,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627845307] [2021-06-05 03:51:34,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:51:34,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:34,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:51:34,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:51:34,266 INFO L87 Difference]: Start difference. First operand 156 states and 393 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:34,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:34,352 INFO L93 Difference]: Finished difference Result 203 states and 463 transitions. [2021-06-05 03:51:34,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:51:34,356 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:51:34,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:34,357 INFO L225 Difference]: With dead ends: 203 [2021-06-05 03:51:34,357 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 03:51:34,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 100.7ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:34,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 03:51:34,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 156. [2021-06-05 03:51:34,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.535483870967742) internal successors, (393), 155 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:34,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 393 transitions. [2021-06-05 03:51:34,360 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 393 transitions. Word has length 17 [2021-06-05 03:51:34,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:34,360 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 393 transitions. [2021-06-05 03:51:34,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:34,360 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 393 transitions. [2021-06-05 03:51:34,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:51:34,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:34,360 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:34,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:34,573 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:34,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:34,573 INFO L82 PathProgramCache]: Analyzing trace with hash 894875775, now seen corresponding path program 36 times [2021-06-05 03:51:34,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:34,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806652666] [2021-06-05 03:51:34,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:34,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:34,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:34,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:34,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806652666] [2021-06-05 03:51:34,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806652666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:34,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993358488] [2021-06-05 03:51:34,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:34,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:51:34,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:34,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:51:34,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:34,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:34,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993358488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:34,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:34,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 03:51:34,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573473317] [2021-06-05 03:51:34,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:51:34,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:34,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:51:34,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:51:34,738 INFO L87 Difference]: Start difference. First operand 156 states and 393 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:34,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:34,876 INFO L93 Difference]: Finished difference Result 276 states and 609 transitions. [2021-06-05 03:51:34,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:51:34,876 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:51:34,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:34,877 INFO L225 Difference]: With dead ends: 276 [2021-06-05 03:51:34,877 INFO L226 Difference]: Without dead ends: 259 [2021-06-05 03:51:34,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 148.2ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:51:34,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-06-05 03:51:34,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 173. [2021-06-05 03:51:34,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.604651162790698) internal successors, (448), 172 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:34,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 448 transitions. [2021-06-05 03:51:34,881 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 448 transitions. Word has length 17 [2021-06-05 03:51:34,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:34,881 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 448 transitions. [2021-06-05 03:51:34,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:34,881 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 448 transitions. [2021-06-05 03:51:34,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:51:34,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:34,881 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:35,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:35,097 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:35,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:35,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1785388797, now seen corresponding path program 37 times [2021-06-05 03:51:35,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:35,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556892847] [2021-06-05 03:51:35,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:35,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:35,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:35,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556892847] [2021-06-05 03:51:35,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556892847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:35,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562994232] [2021-06-05 03:51:35,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:35,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:35,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:51:35,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:35,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562994232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:35,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:35,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 03:51:35,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283277660] [2021-06-05 03:51:35,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:51:35,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:35,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:51:35,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:51:35,254 INFO L87 Difference]: Start difference. First operand 173 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:35,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:35,365 INFO L93 Difference]: Finished difference Result 277 states and 604 transitions. [2021-06-05 03:51:35,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:51:35,366 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:51:35,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:35,366 INFO L225 Difference]: With dead ends: 277 [2021-06-05 03:51:35,366 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 03:51:35,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:51:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 03:51:35,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 170. [2021-06-05 03:51:35,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.57396449704142) internal successors, (435), 169 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:35,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 435 transitions. [2021-06-05 03:51:35,370 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 435 transitions. Word has length 17 [2021-06-05 03:51:35,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:35,370 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 435 transitions. [2021-06-05 03:51:35,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:35,370 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 435 transitions. [2021-06-05 03:51:35,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:51:35,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:35,370 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:35,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:35,579 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:35,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:35,579 INFO L82 PathProgramCache]: Analyzing trace with hash 430284671, now seen corresponding path program 38 times [2021-06-05 03:51:35,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:35,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73084706] [2021-06-05 03:51:35,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:35,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:35,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73084706] [2021-06-05 03:51:35,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73084706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:35,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335134323] [2021-06-05 03:51:35,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:35,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:35,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:35,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:51:35,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:35,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335134323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:35,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:35,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 03:51:35,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186277543] [2021-06-05 03:51:35,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:51:35,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:35,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:51:35,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:51:35,732 INFO L87 Difference]: Start difference. First operand 170 states and 435 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:35,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:35,873 INFO L93 Difference]: Finished difference Result 262 states and 576 transitions. [2021-06-05 03:51:35,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:51:35,873 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:51:35,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:35,874 INFO L225 Difference]: With dead ends: 262 [2021-06-05 03:51:35,874 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 03:51:35,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 128.7ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:51:35,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 03:51:35,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 169. [2021-06-05 03:51:35,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.5773809523809526) internal successors, (433), 168 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:35,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 433 transitions. [2021-06-05 03:51:35,877 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 433 transitions. Word has length 17 [2021-06-05 03:51:35,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:35,877 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 433 transitions. [2021-06-05 03:51:35,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:35,877 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 433 transitions. [2021-06-05 03:51:35,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:51:35,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:35,878 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:36,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:36,086 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:36,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:36,087 INFO L82 PathProgramCache]: Analyzing trace with hash 396685443, now seen corresponding path program 39 times [2021-06-05 03:51:36,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:36,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561857183] [2021-06-05 03:51:36,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:36,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:36,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:36,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:36,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561857183] [2021-06-05 03:51:36,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561857183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:36,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322904143] [2021-06-05 03:51:36,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:36,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 03:51:36,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:36,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:51:36,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:36,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322904143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:36,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:36,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 03:51:36,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021663719] [2021-06-05 03:51:36,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:51:36,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:36,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:51:36,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:51:36,237 INFO L87 Difference]: Start difference. First operand 169 states and 433 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:36,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:36,352 INFO L93 Difference]: Finished difference Result 233 states and 528 transitions. [2021-06-05 03:51:36,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:51:36,352 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:51:36,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:36,353 INFO L225 Difference]: With dead ends: 233 [2021-06-05 03:51:36,353 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 03:51:36,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:51:36,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 03:51:36,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 175. [2021-06-05 03:51:36,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.5402298850574714) internal successors, (442), 174 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:36,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 442 transitions. [2021-06-05 03:51:36,356 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 442 transitions. Word has length 17 [2021-06-05 03:51:36,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:36,356 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 442 transitions. [2021-06-05 03:51:36,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:36,356 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 442 transitions. [2021-06-05 03:51:36,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:51:36,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:36,357 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:36,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:36,577 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:36,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:36,577 INFO L82 PathProgramCache]: Analyzing trace with hash 852863359, now seen corresponding path program 40 times [2021-06-05 03:51:36,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:36,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205827906] [2021-06-05 03:51:36,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:36,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:36,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:36,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205827906] [2021-06-05 03:51:36,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205827906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:36,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411080576] [2021-06-05 03:51:36,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:36,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:51:36,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:36,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:51:36,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:36,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411080576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:36,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:36,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 03:51:36,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330284375] [2021-06-05 03:51:36,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:51:36,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:36,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:51:36,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:51:36,734 INFO L87 Difference]: Start difference. First operand 175 states and 442 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:36,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:36,838 INFO L93 Difference]: Finished difference Result 259 states and 585 transitions. [2021-06-05 03:51:36,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:51:36,839 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:51:36,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:36,839 INFO L225 Difference]: With dead ends: 259 [2021-06-05 03:51:36,839 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 03:51:36,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:51:36,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 03:51:36,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 182. [2021-06-05 03:51:36,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.569060773480663) internal successors, (465), 181 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:36,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 465 transitions. [2021-06-05 03:51:36,848 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 465 transitions. Word has length 17 [2021-06-05 03:51:36,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:36,848 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 465 transitions. [2021-06-05 03:51:36,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:36,848 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 465 transitions. [2021-06-05 03:51:36,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:51:36,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:36,849 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:37,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:37,053 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:37,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:37,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1827401213, now seen corresponding path program 41 times [2021-06-05 03:51:37,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:37,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590677653] [2021-06-05 03:51:37,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:37,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:37,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590677653] [2021-06-05 03:51:37,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590677653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:37,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358099459] [2021-06-05 03:51:37,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:37,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:51:37,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:37,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:51:37,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:37,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358099459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:37,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:37,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 03:51:37,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703839965] [2021-06-05 03:51:37,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:51:37,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:37,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:51:37,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:51:37,234 INFO L87 Difference]: Start difference. First operand 182 states and 465 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:37,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:37,310 INFO L93 Difference]: Finished difference Result 247 states and 565 transitions. [2021-06-05 03:51:37,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:51:37,310 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:51:37,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:37,311 INFO L225 Difference]: With dead ends: 247 [2021-06-05 03:51:37,311 INFO L226 Difference]: Without dead ends: 240 [2021-06-05 03:51:37,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:37,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-05 03:51:37,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 183. [2021-06-05 03:51:37,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5494505494505493) internal successors, (464), 182 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:37,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 464 transitions. [2021-06-05 03:51:37,314 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 464 transitions. Word has length 17 [2021-06-05 03:51:37,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:37,314 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 464 transitions. [2021-06-05 03:51:37,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:37,314 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 464 transitions. [2021-06-05 03:51:37,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:51:37,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:37,314 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:37,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:37,529 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:37,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:37,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1424318165, now seen corresponding path program 42 times [2021-06-05 03:51:37,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:37,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875094664] [2021-06-05 03:51:37,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:37,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:37,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:37,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:37,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875094664] [2021-06-05 03:51:37,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875094664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:37,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413988242] [2021-06-05 03:51:37,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:37,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:51:37,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:37,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:51:37,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:37,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:37,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413988242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:37,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:37,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 03:51:37,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315460541] [2021-06-05 03:51:37,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:51:37,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:37,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:51:37,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:51:37,680 INFO L87 Difference]: Start difference. First operand 183 states and 464 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:37,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:37,762 INFO L93 Difference]: Finished difference Result 231 states and 537 transitions. [2021-06-05 03:51:37,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:51:37,762 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:51:37,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:37,763 INFO L225 Difference]: With dead ends: 231 [2021-06-05 03:51:37,763 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 03:51:37,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:37,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 03:51:37,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 182. [2021-06-05 03:51:37,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.546961325966851) internal successors, (461), 181 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:37,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 461 transitions. [2021-06-05 03:51:37,766 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 461 transitions. Word has length 17 [2021-06-05 03:51:37,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:37,766 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 461 transitions. [2021-06-05 03:51:37,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:37,766 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 461 transitions. [2021-06-05 03:51:37,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:37,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:37,766 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:37,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:37,982 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:37,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:37,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1448785397, now seen corresponding path program 43 times [2021-06-05 03:51:37,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:37,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442978943] [2021-06-05 03:51:37,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:38,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:38,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:38,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442978943] [2021-06-05 03:51:38,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442978943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:38,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902861275] [2021-06-05 03:51:38,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:38,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:38,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:38,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:38,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:38,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902861275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:38,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:38,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 03:51:38,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982694417] [2021-06-05 03:51:38,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:51:38,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:38,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:51:38,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:51:38,082 INFO L87 Difference]: Start difference. First operand 182 states and 461 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:38,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:38,148 INFO L93 Difference]: Finished difference Result 295 states and 722 transitions. [2021-06-05 03:51:38,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:51:38,148 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:38,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:38,149 INFO L225 Difference]: With dead ends: 295 [2021-06-05 03:51:38,149 INFO L226 Difference]: Without dead ends: 281 [2021-06-05 03:51:38,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:51:38,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-05 03:51:38,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 177. [2021-06-05 03:51:38,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.5625) internal successors, (451), 176 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:38,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 451 transitions. [2021-06-05 03:51:38,152 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 451 transitions. Word has length 18 [2021-06-05 03:51:38,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:38,152 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 451 transitions. [2021-06-05 03:51:38,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:38,152 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 451 transitions. [2021-06-05 03:51:38,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:38,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:38,152 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:38,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 03:51:38,368 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:38,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:38,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1017532901, now seen corresponding path program 44 times [2021-06-05 03:51:38,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:38,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980307701] [2021-06-05 03:51:38,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:38,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:38,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980307701] [2021-06-05 03:51:38,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980307701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:38,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861500576] [2021-06-05 03:51:38,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:51:38,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:38,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:38,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:38,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:38,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:38,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861500576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:38,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:38,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 03:51:38,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480867276] [2021-06-05 03:51:38,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:51:38,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:38,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:51:38,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:51:38,461 INFO L87 Difference]: Start difference. First operand 177 states and 451 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:38,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:38,529 INFO L93 Difference]: Finished difference Result 302 states and 747 transitions. [2021-06-05 03:51:38,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:51:38,529 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:38,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:38,530 INFO L225 Difference]: With dead ends: 302 [2021-06-05 03:51:38,530 INFO L226 Difference]: Without dead ends: 302 [2021-06-05 03:51:38,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:51:38,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-06-05 03:51:38,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 183. [2021-06-05 03:51:38,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.576923076923077) internal successors, (469), 182 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:38,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 469 transitions. [2021-06-05 03:51:38,533 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 469 transitions. Word has length 18 [2021-06-05 03:51:38,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:38,533 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 469 transitions. [2021-06-05 03:51:38,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:38,534 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 469 transitions. [2021-06-05 03:51:38,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:38,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:38,534 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:38,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:38,741 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:38,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:38,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1381829455, now seen corresponding path program 45 times [2021-06-05 03:51:38,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:38,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009832244] [2021-06-05 03:51:38,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:38,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:38,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009832244] [2021-06-05 03:51:38,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009832244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:38,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269579001] [2021-06-05 03:51:38,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:51:38,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:51:38,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:38,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:38,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:38,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269579001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:38,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:38,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 03:51:38,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796422124] [2021-06-05 03:51:38,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:38,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:38,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:38,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:38,859 INFO L87 Difference]: Start difference. First operand 183 states and 469 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:39,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:39,049 INFO L93 Difference]: Finished difference Result 476 states and 1093 transitions. [2021-06-05 03:51:39,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:51:39,049 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:39,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:39,051 INFO L225 Difference]: With dead ends: 476 [2021-06-05 03:51:39,051 INFO L226 Difference]: Without dead ends: 474 [2021-06-05 03:51:39,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 145.4ms TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:51:39,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-06-05 03:51:39,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 222. [2021-06-05 03:51:39,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.746606334841629) internal successors, (607), 221 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:39,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 607 transitions. [2021-06-05 03:51:39,055 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 607 transitions. Word has length 18 [2021-06-05 03:51:39,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:39,055 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 607 transitions. [2021-06-05 03:51:39,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:39,055 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 607 transitions. [2021-06-05 03:51:39,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:39,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:39,056 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:39,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 03:51:39,272 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:39,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:39,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1953284261, now seen corresponding path program 46 times [2021-06-05 03:51:39,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:39,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373067237] [2021-06-05 03:51:39,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:39,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:39,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373067237] [2021-06-05 03:51:39,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373067237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:39,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605519583] [2021-06-05 03:51:39,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:39,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:51:39,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:39,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:39,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:39,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605519583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:39,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:39,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 03:51:39,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891483911] [2021-06-05 03:51:39,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:39,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:39,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:39,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:39,384 INFO L87 Difference]: Start difference. First operand 222 states and 607 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:39,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:39,589 INFO L93 Difference]: Finished difference Result 476 states and 1089 transitions. [2021-06-05 03:51:39,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 03:51:39,589 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:39,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:39,590 INFO L225 Difference]: With dead ends: 476 [2021-06-05 03:51:39,590 INFO L226 Difference]: Without dead ends: 470 [2021-06-05 03:51:39,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 167.8ms TimeCoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2021-06-05 03:51:39,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-06-05 03:51:39,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 205. [2021-06-05 03:51:39,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.661764705882353) internal successors, (543), 204 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:39,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 543 transitions. [2021-06-05 03:51:39,594 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 543 transitions. Word has length 18 [2021-06-05 03:51:39,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:39,594 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 543 transitions. [2021-06-05 03:51:39,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:39,594 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 543 transitions. [2021-06-05 03:51:39,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:39,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:39,595 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:39,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 03:51:39,809 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:39,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:39,809 INFO L82 PathProgramCache]: Analyzing trace with hash 21712715, now seen corresponding path program 47 times [2021-06-05 03:51:39,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:39,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568921288] [2021-06-05 03:51:39,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:39,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:39,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568921288] [2021-06-05 03:51:39,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568921288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:39,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361989264] [2021-06-05 03:51:39,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:39,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:51:39,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:39,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:39,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:39,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361989264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:39,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:39,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 03:51:39,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481304938] [2021-06-05 03:51:39,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:39,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:39,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:39,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:39,910 INFO L87 Difference]: Start difference. First operand 205 states and 543 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:40,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:40,098 INFO L93 Difference]: Finished difference Result 423 states and 962 transitions. [2021-06-05 03:51:40,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:51:40,098 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:40,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:40,099 INFO L225 Difference]: With dead ends: 423 [2021-06-05 03:51:40,099 INFO L226 Difference]: Without dead ends: 423 [2021-06-05 03:51:40,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 153.2ms TimeCoverageRelationStatistics Valid=259, Invalid=443, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:51:40,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-05 03:51:40,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 211. [2021-06-05 03:51:40,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.6904761904761907) internal successors, (565), 210 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:40,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 565 transitions. [2021-06-05 03:51:40,103 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 565 transitions. Word has length 18 [2021-06-05 03:51:40,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:40,103 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 565 transitions. [2021-06-05 03:51:40,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:40,103 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 565 transitions. [2021-06-05 03:51:40,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:40,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:40,103 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:40,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 03:51:40,317 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:40,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:40,317 INFO L82 PathProgramCache]: Analyzing trace with hash -442878389, now seen corresponding path program 48 times [2021-06-05 03:51:40,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:40,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643770723] [2021-06-05 03:51:40,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:40,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:40,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643770723] [2021-06-05 03:51:40,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643770723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:40,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111510796] [2021-06-05 03:51:40,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:40,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:51:40,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:40,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:40,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:40,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111510796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:40,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:40,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 03:51:40,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292796987] [2021-06-05 03:51:40,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:40,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:40,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:40,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:40,466 INFO L87 Difference]: Start difference. First operand 211 states and 565 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:40,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:40,695 INFO L93 Difference]: Finished difference Result 326 states and 774 transitions. [2021-06-05 03:51:40,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 03:51:40,695 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:40,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:40,696 INFO L225 Difference]: With dead ends: 326 [2021-06-05 03:51:40,696 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 03:51:40,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 170.4ms TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 03:51:40,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 03:51:40,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 205. [2021-06-05 03:51:40,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.6666666666666665) internal successors, (544), 204 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:40,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 544 transitions. [2021-06-05 03:51:40,699 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 544 transitions. Word has length 18 [2021-06-05 03:51:40,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:40,699 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 544 transitions. [2021-06-05 03:51:40,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:40,699 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 544 transitions. [2021-06-05 03:51:40,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:40,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:40,700 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:40,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 03:51:40,900 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:40,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:40,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1806453233, now seen corresponding path program 49 times [2021-06-05 03:51:40,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:40,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470559247] [2021-06-05 03:51:40,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:40,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:40,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:40,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:40,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470559247] [2021-06-05 03:51:40,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470559247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:40,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051319352] [2021-06-05 03:51:40,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:40,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:40,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:40,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:41,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:41,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051319352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:41,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:41,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 03:51:41,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387568656] [2021-06-05 03:51:41,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:41,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:41,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:41,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:41,018 INFO L87 Difference]: Start difference. First operand 205 states and 544 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:41,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:41,261 INFO L93 Difference]: Finished difference Result 460 states and 1057 transitions. [2021-06-05 03:51:41,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 03:51:41,261 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:41,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:41,263 INFO L225 Difference]: With dead ends: 460 [2021-06-05 03:51:41,263 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 03:51:41,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 179.7ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:51:41,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 03:51:41,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 215. [2021-06-05 03:51:41,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.682242990654206) internal successors, (574), 214 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:41,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 574 transitions. [2021-06-05 03:51:41,268 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 574 transitions. Word has length 18 [2021-06-05 03:51:41,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:41,268 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 574 transitions. [2021-06-05 03:51:41,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:41,268 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 574 transitions. [2021-06-05 03:51:41,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:41,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:41,268 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:41,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 03:51:41,477 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:41,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:41,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1900768741, now seen corresponding path program 50 times [2021-06-05 03:51:41,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:41,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515470232] [2021-06-05 03:51:41,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:41,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:41,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:41,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515470232] [2021-06-05 03:51:41,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515470232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:41,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664587360] [2021-06-05 03:51:41,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:41,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:41,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:41,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:41,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:41,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:41,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664587360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:41,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:41,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 03:51:41,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486670747] [2021-06-05 03:51:41,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:41,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:41,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:41,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:41,583 INFO L87 Difference]: Start difference. First operand 215 states and 574 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:41,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:41,723 INFO L93 Difference]: Finished difference Result 374 states and 891 transitions. [2021-06-05 03:51:41,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:51:41,724 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:41,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:41,725 INFO L225 Difference]: With dead ends: 374 [2021-06-05 03:51:41,725 INFO L226 Difference]: Without dead ends: 365 [2021-06-05 03:51:41,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 137.5ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:51:41,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-05 03:51:41,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 215. [2021-06-05 03:51:41,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.6728971962616823) internal successors, (572), 214 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:41,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 572 transitions. [2021-06-05 03:51:41,728 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 572 transitions. Word has length 18 [2021-06-05 03:51:41,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:41,728 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 572 transitions. [2021-06-05 03:51:41,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:41,728 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 572 transitions. [2021-06-05 03:51:41,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:41,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:41,729 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:41,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 03:51:41,933 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:41,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:41,933 INFO L82 PathProgramCache]: Analyzing trace with hash 479126159, now seen corresponding path program 51 times [2021-06-05 03:51:41,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:41,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469699062] [2021-06-05 03:51:41,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:41,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:41,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469699062] [2021-06-05 03:51:41,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469699062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:41,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727588030] [2021-06-05 03:51:41,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:41,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:51:41,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:41,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:41,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:42,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727588030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:42,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:42,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 03:51:42,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896950021] [2021-06-05 03:51:42,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:42,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:42,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:42,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:42,041 INFO L87 Difference]: Start difference. First operand 215 states and 572 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:42,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:42,217 INFO L93 Difference]: Finished difference Result 439 states and 1014 transitions. [2021-06-05 03:51:42,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:51:42,217 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:42,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:42,219 INFO L225 Difference]: With dead ends: 439 [2021-06-05 03:51:42,219 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 03:51:42,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 147.7ms TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:51:42,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 03:51:42,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 233. [2021-06-05 03:51:42,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.689655172413793) internal successors, (624), 232 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:42,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 624 transitions. [2021-06-05 03:51:42,222 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 624 transitions. Word has length 18 [2021-06-05 03:51:42,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:42,223 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 624 transitions. [2021-06-05 03:51:42,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:42,223 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 624 transitions. [2021-06-05 03:51:42,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:42,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:42,223 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:42,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 03:51:42,433 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:42,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:42,433 INFO L82 PathProgramCache]: Analyzing trace with hash 14535055, now seen corresponding path program 52 times [2021-06-05 03:51:42,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:42,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734727075] [2021-06-05 03:51:42,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:42,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:42,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:42,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734727075] [2021-06-05 03:51:42,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734727075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:42,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478842072] [2021-06-05 03:51:42,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:42,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:51:42,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:42,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:42,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:42,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478842072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:42,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:42,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 03:51:42,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857098002] [2021-06-05 03:51:42,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:42,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:42,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:42,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:42,541 INFO L87 Difference]: Start difference. First operand 233 states and 624 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:42,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:42,780 INFO L93 Difference]: Finished difference Result 389 states and 889 transitions. [2021-06-05 03:51:42,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 03:51:42,780 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:42,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:42,781 INFO L225 Difference]: With dead ends: 389 [2021-06-05 03:51:42,781 INFO L226 Difference]: Without dead ends: 383 [2021-06-05 03:51:42,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 207.6ms TimeCoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 03:51:42,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-05 03:51:42,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 216. [2021-06-05 03:51:42,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.6511627906976742) internal successors, (570), 215 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:42,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 570 transitions. [2021-06-05 03:51:42,785 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 570 transitions. Word has length 18 [2021-06-05 03:51:42,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:42,785 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 570 transitions. [2021-06-05 03:51:42,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:42,785 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 570 transitions. [2021-06-05 03:51:42,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:42,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:42,785 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:43,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:43,001 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:43,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:43,002 INFO L82 PathProgramCache]: Analyzing trace with hash -19064173, now seen corresponding path program 53 times [2021-06-05 03:51:43,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:43,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753841207] [2021-06-05 03:51:43,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:43,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:43,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753841207] [2021-06-05 03:51:43,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753841207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:43,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217585525] [2021-06-05 03:51:43,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:43,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:51:43,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:43,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:43,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:43,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217585525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:43,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:43,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 03:51:43,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986748323] [2021-06-05 03:51:43,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:51:43,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:43,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:51:43,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:43,113 INFO L87 Difference]: Start difference. First operand 216 states and 570 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:43,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:43,320 INFO L93 Difference]: Finished difference Result 347 states and 818 transitions. [2021-06-05 03:51:43,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 03:51:43,320 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:43,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:43,321 INFO L225 Difference]: With dead ends: 347 [2021-06-05 03:51:43,321 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 03:51:43,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 179.9ms TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 03:51:43,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 03:51:43,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 227. [2021-06-05 03:51:43,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.65929203539823) internal successors, (601), 226 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:43,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 601 transitions. [2021-06-05 03:51:43,325 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 601 transitions. Word has length 18 [2021-06-05 03:51:43,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:43,325 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 601 transitions. [2021-06-05 03:51:43,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:43,325 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 601 transitions. [2021-06-05 03:51:43,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:43,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:43,325 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:43,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 03:51:43,532 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:43,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:43,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1774041035, now seen corresponding path program 54 times [2021-06-05 03:51:43,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:43,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117766259] [2021-06-05 03:51:43,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:43,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:43,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:43,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117766259] [2021-06-05 03:51:43,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117766259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:43,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477581027] [2021-06-05 03:51:43,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:43,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:51:43,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:43,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:43,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:43,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477581027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:43,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:43,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-05 03:51:43,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936412361] [2021-06-05 03:51:43,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:43,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:43,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:43,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:43,640 INFO L87 Difference]: Start difference. First operand 227 states and 601 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:43,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:43,812 INFO L93 Difference]: Finished difference Result 526 states and 1217 transitions. [2021-06-05 03:51:43,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:51:43,813 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:43,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:43,814 INFO L225 Difference]: With dead ends: 526 [2021-06-05 03:51:43,814 INFO L226 Difference]: Without dead ends: 523 [2021-06-05 03:51:43,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 141.0ms TimeCoverageRelationStatistics Valid=226, Invalid=374, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:51:43,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-06-05 03:51:43,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 274. [2021-06-05 03:51:43,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.7472527472527473) internal successors, (750), 273 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:43,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 750 transitions. [2021-06-05 03:51:43,819 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 750 transitions. Word has length 18 [2021-06-05 03:51:43,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:43,819 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 750 transitions. [2021-06-05 03:51:43,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:43,819 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 750 transitions. [2021-06-05 03:51:43,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:43,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:43,819 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:44,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:44,033 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:44,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:44,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1309449931, now seen corresponding path program 55 times [2021-06-05 03:51:44,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:44,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081895868] [2021-06-05 03:51:44,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:44,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:44,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:44,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081895868] [2021-06-05 03:51:44,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081895868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:44,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704274506] [2021-06-05 03:51:44,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:44,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:44,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:44,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:44,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:44,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704274506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:44,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:44,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-05 03:51:44,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355607909] [2021-06-05 03:51:44,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:44,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:44,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:44,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:44,152 INFO L87 Difference]: Start difference. First operand 274 states and 750 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:44,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:44,405 INFO L93 Difference]: Finished difference Result 468 states and 1095 transitions. [2021-06-05 03:51:44,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 03:51:44,406 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:44,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:44,407 INFO L225 Difference]: With dead ends: 468 [2021-06-05 03:51:44,407 INFO L226 Difference]: Without dead ends: 464 [2021-06-05 03:51:44,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 222.5ms TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 03:51:44,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-06-05 03:51:44,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 272. [2021-06-05 03:51:44,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.734317343173432) internal successors, (741), 271 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:44,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 741 transitions. [2021-06-05 03:51:44,411 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 741 transitions. Word has length 18 [2021-06-05 03:51:44,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:44,411 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 741 transitions. [2021-06-05 03:51:44,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:44,411 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 741 transitions. [2021-06-05 03:51:44,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:44,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:44,412 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:44,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-06-05 03:51:44,625 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:44,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:44,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1275850703, now seen corresponding path program 56 times [2021-06-05 03:51:44,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:44,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371334894] [2021-06-05 03:51:44,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:44,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:44,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:44,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371334894] [2021-06-05 03:51:44,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371334894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:44,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815969427] [2021-06-05 03:51:44,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:44,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:44,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:44,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:44,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:44,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:44,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815969427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:44,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:44,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 03:51:44,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937414167] [2021-06-05 03:51:44,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:51:44,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:44,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:51:44,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:44,736 INFO L87 Difference]: Start difference. First operand 272 states and 741 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:44,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:44,967 INFO L93 Difference]: Finished difference Result 487 states and 1167 transitions. [2021-06-05 03:51:44,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 03:51:44,967 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:44,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:44,969 INFO L225 Difference]: With dead ends: 487 [2021-06-05 03:51:44,969 INFO L226 Difference]: Without dead ends: 479 [2021-06-05 03:51:44,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 196.7ms TimeCoverageRelationStatistics Valid=387, Invalid=873, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 03:51:44,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-05 03:51:44,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 293. [2021-06-05 03:51:44,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.791095890410959) internal successors, (815), 292 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:44,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 815 transitions. [2021-06-05 03:51:44,973 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 815 transitions. Word has length 18 [2021-06-05 03:51:44,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:44,973 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 815 transitions. [2021-06-05 03:51:44,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:44,973 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 815 transitions. [2021-06-05 03:51:44,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:44,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:44,974 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:45,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:45,189 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:45,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:45,189 INFO L82 PathProgramCache]: Analyzing trace with hash 234274635, now seen corresponding path program 57 times [2021-06-05 03:51:45,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:45,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617188359] [2021-06-05 03:51:45,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:45,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:45,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:45,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617188359] [2021-06-05 03:51:45,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617188359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:45,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013211141] [2021-06-05 03:51:45,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:45,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:51:45,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:45,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:45,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:45,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013211141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:45,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:45,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 03:51:45,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802521271] [2021-06-05 03:51:45,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:51:45,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:45,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:51:45,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:51:45,298 INFO L87 Difference]: Start difference. First operand 293 states and 815 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:45,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:45,511 INFO L93 Difference]: Finished difference Result 466 states and 1157 transitions. [2021-06-05 03:51:45,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 03:51:45,511 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:45,513 INFO L225 Difference]: With dead ends: 466 [2021-06-05 03:51:45,513 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 03:51:45,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 196.1ms TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 03:51:45,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 03:51:45,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 312. [2021-06-05 03:51:45,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.8006430868167205) internal successors, (871), 311 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:45,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 871 transitions. [2021-06-05 03:51:45,517 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 871 transitions. Word has length 18 [2021-06-05 03:51:45,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:45,517 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 871 transitions. [2021-06-05 03:51:45,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:45,517 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 871 transitions. [2021-06-05 03:51:45,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:45,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:45,518 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:45,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:45,730 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:45,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:45,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1797099147, now seen corresponding path program 58 times [2021-06-05 03:51:45,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:45,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775484982] [2021-06-05 03:51:45,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:45,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:45,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775484982] [2021-06-05 03:51:45,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775484982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:45,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618545255] [2021-06-05 03:51:45,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:45,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:51:45,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:45,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:45,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:45,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618545255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:45,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:45,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 03:51:45,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123666873] [2021-06-05 03:51:45,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:51:45,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:45,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:51:45,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:51:45,818 INFO L87 Difference]: Start difference. First operand 312 states and 871 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:45,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:45,889 INFO L93 Difference]: Finished difference Result 436 states and 1155 transitions. [2021-06-05 03:51:45,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:51:45,892 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:45,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:45,894 INFO L225 Difference]: With dead ends: 436 [2021-06-05 03:51:45,894 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 03:51:45,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:51:45,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 03:51:45,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 316. [2021-06-05 03:51:45,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.812698412698413) internal successors, (886), 315 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:45,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 886 transitions. [2021-06-05 03:51:45,898 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 886 transitions. Word has length 18 [2021-06-05 03:51:45,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:45,898 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 886 transitions. [2021-06-05 03:51:45,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:45,898 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 886 transitions. [2021-06-05 03:51:45,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:45,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:45,899 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:46,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:46,099 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:46,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:46,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1169170729, now seen corresponding path program 59 times [2021-06-05 03:51:46,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:46,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667532983] [2021-06-05 03:51:46,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:46,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:46,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:46,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667532983] [2021-06-05 03:51:46,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667532983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:46,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305003550] [2021-06-05 03:51:46,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:46,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:51:46,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:46,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:46,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:46,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305003550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:46,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:46,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 03:51:46,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647465241] [2021-06-05 03:51:46,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:46,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:46,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:46,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:46,195 INFO L87 Difference]: Start difference. First operand 316 states and 886 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:46,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:46,311 INFO L93 Difference]: Finished difference Result 389 states and 1033 transitions. [2021-06-05 03:51:46,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:51:46,311 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:46,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:46,313 INFO L225 Difference]: With dead ends: 389 [2021-06-05 03:51:46,313 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 03:51:46,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:51:46,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 03:51:46,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 319. [2021-06-05 03:51:46,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.8144654088050314) internal successors, (895), 318 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:46,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 895 transitions. [2021-06-05 03:51:46,317 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 895 transitions. Word has length 18 [2021-06-05 03:51:46,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:46,317 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 895 transitions. [2021-06-05 03:51:46,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:46,317 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 895 transitions. [2021-06-05 03:51:46,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:46,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:46,317 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:46,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 03:51:46,534 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:46,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:46,534 INFO L82 PathProgramCache]: Analyzing trace with hash 937613391, now seen corresponding path program 60 times [2021-06-05 03:51:46,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:46,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739798326] [2021-06-05 03:51:46,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:46,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:46,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:46,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739798326] [2021-06-05 03:51:46,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739798326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:46,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733442649] [2021-06-05 03:51:46,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:46,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:51:46,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:46,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:46,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:46,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733442649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:46,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:46,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 03:51:46,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854216072] [2021-06-05 03:51:46,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:46,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:46,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:46,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:46,628 INFO L87 Difference]: Start difference. First operand 319 states and 895 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:46,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:46,761 INFO L93 Difference]: Finished difference Result 399 states and 1054 transitions. [2021-06-05 03:51:46,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:51:46,761 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:46,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:46,762 INFO L225 Difference]: With dead ends: 399 [2021-06-05 03:51:46,762 INFO L226 Difference]: Without dead ends: 399 [2021-06-05 03:51:46,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:51:46,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-05 03:51:46,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 322. [2021-06-05 03:51:46,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.8161993769470404) internal successors, (904), 321 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:46,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 904 transitions. [2021-06-05 03:51:46,766 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 904 transitions. Word has length 18 [2021-06-05 03:51:46,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:46,767 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 904 transitions. [2021-06-05 03:51:46,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:46,767 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 904 transitions. [2021-06-05 03:51:46,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:46,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:46,768 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:46,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:46,985 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:46,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:46,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1211183145, now seen corresponding path program 61 times [2021-06-05 03:51:46,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:46,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409852587] [2021-06-05 03:51:46,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:47,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:47,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409852587] [2021-06-05 03:51:47,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409852587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:47,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347741457] [2021-06-05 03:51:47,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:47,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:47,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:47,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:47,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347741457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:47,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:47,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 03:51:47,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496918993] [2021-06-05 03:51:47,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:47,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:47,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:47,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:47,087 INFO L87 Difference]: Start difference. First operand 322 states and 904 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:47,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:47,265 INFO L93 Difference]: Finished difference Result 497 states and 1220 transitions. [2021-06-05 03:51:47,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:51:47,266 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:47,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:47,267 INFO L225 Difference]: With dead ends: 497 [2021-06-05 03:51:47,267 INFO L226 Difference]: Without dead ends: 497 [2021-06-05 03:51:47,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=259, Invalid=443, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:51:47,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-06-05 03:51:47,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 319. [2021-06-05 03:51:47,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.8207547169811322) internal successors, (897), 318 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:47,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 897 transitions. [2021-06-05 03:51:47,271 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 897 transitions. Word has length 18 [2021-06-05 03:51:47,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:47,271 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 897 transitions. [2021-06-05 03:51:47,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:47,272 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 897 transitions. [2021-06-05 03:51:47,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:47,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:47,272 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:47,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 03:51:47,477 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:47,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:47,477 INFO L82 PathProgramCache]: Analyzing trace with hash -639728339, now seen corresponding path program 62 times [2021-06-05 03:51:47,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:47,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781085634] [2021-06-05 03:51:47,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:47,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:47,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781085634] [2021-06-05 03:51:47,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781085634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:47,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017150825] [2021-06-05 03:51:47,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:47,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:47,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:47,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:47,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:47,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017150825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:47,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:47,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 03:51:47,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147733816] [2021-06-05 03:51:47,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:47,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:47,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:47,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:47,575 INFO L87 Difference]: Start difference. First operand 319 states and 897 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:47,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:47,782 INFO L93 Difference]: Finished difference Result 422 states and 1069 transitions. [2021-06-05 03:51:47,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 03:51:47,782 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:47,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:47,783 INFO L225 Difference]: With dead ends: 422 [2021-06-05 03:51:47,783 INFO L226 Difference]: Without dead ends: 416 [2021-06-05 03:51:47,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 167.5ms TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 03:51:47,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-05 03:51:47,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 313. [2021-06-05 03:51:47,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.8108974358974357) internal successors, (877), 312 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:47,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 877 transitions. [2021-06-05 03:51:47,787 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 877 transitions. Word has length 18 [2021-06-05 03:51:47,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:47,787 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 877 transitions. [2021-06-05 03:51:47,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:47,787 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 877 transitions. [2021-06-05 03:51:47,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:47,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:47,788 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:47,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 03:51:47,993 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:47,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:47,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1723667411, now seen corresponding path program 63 times [2021-06-05 03:51:47,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:47,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828266153] [2021-06-05 03:51:47,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:48,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:48,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828266153] [2021-06-05 03:51:48,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828266153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:48,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355578215] [2021-06-05 03:51:48,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:48,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:51:48,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:48,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:48,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:48,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355578215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:48,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:48,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 03:51:48,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002386586] [2021-06-05 03:51:48,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:48,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:48,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:48,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:48,108 INFO L87 Difference]: Start difference. First operand 313 states and 877 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:48,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:48,266 INFO L93 Difference]: Finished difference Result 573 states and 1416 transitions. [2021-06-05 03:51:48,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:51:48,267 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:48,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:48,268 INFO L225 Difference]: With dead ends: 573 [2021-06-05 03:51:48,268 INFO L226 Difference]: Without dead ends: 570 [2021-06-05 03:51:48,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 134.6ms TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:51:48,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-05 03:51:48,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 353. [2021-06-05 03:51:48,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.875) internal successors, (1012), 352 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1012 transitions. [2021-06-05 03:51:48,273 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1012 transitions. Word has length 18 [2021-06-05 03:51:48,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:48,273 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1012 transitions. [2021-06-05 03:51:48,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:48,274 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1012 transitions. [2021-06-05 03:51:48,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:48,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:48,274 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:48,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 03:51:48,490 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:48,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:48,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1259076307, now seen corresponding path program 64 times [2021-06-05 03:51:48,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:48,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077470951] [2021-06-05 03:51:48,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:48,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:48,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:48,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077470951] [2021-06-05 03:51:48,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077470951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:48,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115486402] [2021-06-05 03:51:48,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:48,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:51:48,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:48,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:48,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:48,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115486402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:48,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:48,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 03:51:48,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541649351] [2021-06-05 03:51:48,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:48,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:48,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:48,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:48,604 INFO L87 Difference]: Start difference. First operand 353 states and 1012 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:48,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:48,801 INFO L93 Difference]: Finished difference Result 554 states and 1385 transitions. [2021-06-05 03:51:48,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 03:51:48,804 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:48,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:48,806 INFO L225 Difference]: With dead ends: 554 [2021-06-05 03:51:48,806 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 03:51:48,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 160.9ms TimeCoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2021-06-05 03:51:48,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 03:51:48,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 334. [2021-06-05 03:51:48,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.8228228228228227) internal successors, (940), 333 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:48,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 940 transitions. [2021-06-05 03:51:48,811 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 940 transitions. Word has length 18 [2021-06-05 03:51:48,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:48,811 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 940 transitions. [2021-06-05 03:51:48,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:48,811 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 940 transitions. [2021-06-05 03:51:48,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:48,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:48,812 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:49,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:49,025 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:49,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:49,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1225477079, now seen corresponding path program 65 times [2021-06-05 03:51:49,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:49,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674778421] [2021-06-05 03:51:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:49,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:49,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:49,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674778421] [2021-06-05 03:51:49,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674778421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:49,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384684584] [2021-06-05 03:51:49,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:49,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:49,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:49,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:49,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:49,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384684584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:49,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:49,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 03:51:49,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593746632] [2021-06-05 03:51:49,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:49,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:49,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:49,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:49,126 INFO L87 Difference]: Start difference. First operand 334 states and 940 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:49,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:49,319 INFO L93 Difference]: Finished difference Result 542 states and 1356 transitions. [2021-06-05 03:51:49,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 03:51:49,320 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:49,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:49,321 INFO L225 Difference]: With dead ends: 542 [2021-06-05 03:51:49,321 INFO L226 Difference]: Without dead ends: 534 [2021-06-05 03:51:49,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 151.8ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:51:49,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-05 03:51:49,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 348. [2021-06-05 03:51:49,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.829971181556196) internal successors, (982), 347 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:49,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 982 transitions. [2021-06-05 03:51:49,326 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 982 transitions. Word has length 18 [2021-06-05 03:51:49,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:49,326 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 982 transitions. [2021-06-05 03:51:49,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:49,326 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 982 transitions. [2021-06-05 03:51:49,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:49,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:49,327 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:49,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 03:51:49,532 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:49,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:49,533 INFO L82 PathProgramCache]: Analyzing trace with hash 183901011, now seen corresponding path program 66 times [2021-06-05 03:51:49,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:49,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471857078] [2021-06-05 03:51:49,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:49,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:49,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471857078] [2021-06-05 03:51:49,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471857078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:49,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759914590] [2021-06-05 03:51:49,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:49,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:51:49,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:49,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:49,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:49,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759914590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:49,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:49,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 03:51:49,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817061922] [2021-06-05 03:51:49,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:49,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:49,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:49,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:49,635 INFO L87 Difference]: Start difference. First operand 348 states and 982 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:49,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:49,778 INFO L93 Difference]: Finished difference Result 473 states and 1218 transitions. [2021-06-05 03:51:49,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:51:49,778 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:49,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:49,779 INFO L225 Difference]: With dead ends: 473 [2021-06-05 03:51:49,779 INFO L226 Difference]: Without dead ends: 467 [2021-06-05 03:51:49,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 132.9ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:51:49,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-06-05 03:51:49,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 349. [2021-06-05 03:51:49,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.82183908045977) internal successors, (982), 348 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:49,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 982 transitions. [2021-06-05 03:51:49,791 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 982 transitions. Word has length 18 [2021-06-05 03:51:49,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:49,791 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 982 transitions. [2021-06-05 03:51:49,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:49,791 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 982 transitions. [2021-06-05 03:51:49,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:49,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:49,791 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:50,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:50,007 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:50,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:50,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1388993577, now seen corresponding path program 67 times [2021-06-05 03:51:50,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:50,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844353594] [2021-06-05 03:51:50,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:50,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:50,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:50,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844353594] [2021-06-05 03:51:50,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844353594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:50,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751439124] [2021-06-05 03:51:50,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:50,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:50,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:50,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751439124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:50,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:50,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 03:51:50,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101413138] [2021-06-05 03:51:50,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:51:50,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:50,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:51:50,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:51:50,100 INFO L87 Difference]: Start difference. First operand 349 states and 982 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:50,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:50,155 INFO L93 Difference]: Finished difference Result 405 states and 1105 transitions. [2021-06-05 03:51:50,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:51:50,155 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:50,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:50,156 INFO L225 Difference]: With dead ends: 405 [2021-06-05 03:51:50,156 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 03:51:50,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:51:50,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 03:51:50,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 349. [2021-06-05 03:51:50,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.8189655172413794) internal successors, (981), 348 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:50,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 981 transitions. [2021-06-05 03:51:50,160 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 981 transitions. Word has length 18 [2021-06-05 03:51:50,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:50,160 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 981 transitions. [2021-06-05 03:51:50,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:50,161 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 981 transitions. [2021-06-05 03:51:50,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:50,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:50,161 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:50,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-06-05 03:51:50,362 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:50,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:50,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1365743627, now seen corresponding path program 68 times [2021-06-05 03:51:50,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:50,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942701721] [2021-06-05 03:51:50,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:50,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:50,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:50,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942701721] [2021-06-05 03:51:50,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942701721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:50,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336324688] [2021-06-05 03:51:50,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:50,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:50,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:50,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:50,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:50,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336324688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:50,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:50,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 03:51:50,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210531866] [2021-06-05 03:51:50,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:51:50,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:50,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:51:50,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:50,498 INFO L87 Difference]: Start difference. First operand 349 states and 981 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:50,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:50,678 INFO L93 Difference]: Finished difference Result 447 states and 1174 transitions. [2021-06-05 03:51:50,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:51:50,678 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:50,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:50,679 INFO L225 Difference]: With dead ends: 447 [2021-06-05 03:51:50,679 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 03:51:50,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 154.7ms TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:51:50,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 03:51:50,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 354. [2021-06-05 03:51:50,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.818696883852691) internal successors, (995), 353 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:50,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 995 transitions. [2021-06-05 03:51:50,684 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 995 transitions. Word has length 18 [2021-06-05 03:51:50,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:50,684 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 995 transitions. [2021-06-05 03:51:50,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:50,684 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 995 transitions. [2021-06-05 03:51:50,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:50,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:50,685 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:50,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:50,889 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:50,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:50,889 INFO L82 PathProgramCache]: Analyzing trace with hash 63358731, now seen corresponding path program 69 times [2021-06-05 03:51:50,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:50,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928647754] [2021-06-05 03:51:50,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:50,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:50,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:50,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928647754] [2021-06-05 03:51:50,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928647754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:50,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139438053] [2021-06-05 03:51:50,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:50,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:51:50,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:50,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:50,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:50,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139438053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:50,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:50,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 03:51:50,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074816117] [2021-06-05 03:51:50,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:50,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:50,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:50,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:50,991 INFO L87 Difference]: Start difference. First operand 354 states and 995 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:51,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:51,168 INFO L93 Difference]: Finished difference Result 485 states and 1256 transitions. [2021-06-05 03:51:51,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:51:51,168 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:51,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:51,170 INFO L225 Difference]: With dead ends: 485 [2021-06-05 03:51:51,170 INFO L226 Difference]: Without dead ends: 483 [2021-06-05 03:51:51,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 140.7ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:51:51,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-05 03:51:51,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 352. [2021-06-05 03:51:51,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.8290598290598292) internal successors, (993), 351 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:51,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 993 transitions. [2021-06-05 03:51:51,174 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 993 transitions. Word has length 18 [2021-06-05 03:51:51,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:51,174 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 993 transitions. [2021-06-05 03:51:51,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:51,174 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 993 transitions. [2021-06-05 03:51:51,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:51,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:51,175 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:51,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 03:51:51,391 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:51,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:51,391 INFO L82 PathProgramCache]: Analyzing trace with hash 21346315, now seen corresponding path program 70 times [2021-06-05 03:51:51,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:51,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453716024] [2021-06-05 03:51:51,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:51,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:51,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453716024] [2021-06-05 03:51:51,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453716024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:51,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300154320] [2021-06-05 03:51:51,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:51,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:51:51,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:51,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:51,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:51,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:51,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300154320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:51,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:51,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 03:51:51,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892708307] [2021-06-05 03:51:51,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:51,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:51,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:51,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:51,482 INFO L87 Difference]: Start difference. First operand 352 states and 993 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:51,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:51,639 INFO L93 Difference]: Finished difference Result 553 states and 1393 transitions. [2021-06-05 03:51:51,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:51:51,639 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:51,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:51,640 INFO L225 Difference]: With dead ends: 553 [2021-06-05 03:51:51,640 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 03:51:51,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:51:51,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 03:51:51,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 355. [2021-06-05 03:51:51,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.824858757062147) internal successors, (1000), 354 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:51,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1000 transitions. [2021-06-05 03:51:51,645 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1000 transitions. Word has length 18 [2021-06-05 03:51:51,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:51,645 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1000 transitions. [2021-06-05 03:51:51,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:51,645 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1000 transitions. [2021-06-05 03:51:51,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:51,645 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:51,645 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:51,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:51,846 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:51,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:51,852 INFO L82 PathProgramCache]: Analyzing trace with hash 592801121, now seen corresponding path program 71 times [2021-06-05 03:51:51,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:51,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541793237] [2021-06-05 03:51:51,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:51,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:51,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:51,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541793237] [2021-06-05 03:51:51,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541793237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:51,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083585565] [2021-06-05 03:51:51,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:51,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:51:51,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:51,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:51,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:51,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083585565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:51,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:51,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 03:51:51,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010022801] [2021-06-05 03:51:51,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:51,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:51,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:51,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:51,964 INFO L87 Difference]: Start difference. First operand 355 states and 1000 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:52,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:52,185 INFO L93 Difference]: Finished difference Result 530 states and 1319 transitions. [2021-06-05 03:51:52,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 03:51:52,186 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:52,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:52,186 INFO L225 Difference]: With dead ends: 530 [2021-06-05 03:51:52,187 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 03:51:52,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 03:51:52,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 03:51:52,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 341. [2021-06-05 03:51:52,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.8) internal successors, (952), 340 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:52,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 952 transitions. [2021-06-05 03:51:52,191 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 952 transitions. Word has length 18 [2021-06-05 03:51:52,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:52,191 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 952 transitions. [2021-06-05 03:51:52,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:52,191 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 952 transitions. [2021-06-05 03:51:52,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:52,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:52,192 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:52,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 03:51:52,395 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:52,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:52,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1128030923, now seen corresponding path program 72 times [2021-06-05 03:51:52,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:52,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071512077] [2021-06-05 03:51:52,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:52,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:52,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071512077] [2021-06-05 03:51:52,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071512077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:52,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159121456] [2021-06-05 03:51:52,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:52,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:51:52,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:52,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:52,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:52,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:52,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159121456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:52,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:52,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 03:51:52,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754864513] [2021-06-05 03:51:52,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:51:52,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:52,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:51:52,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:52,514 INFO L87 Difference]: Start difference. First operand 341 states and 952 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:52,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:52,738 INFO L93 Difference]: Finished difference Result 483 states and 1236 transitions. [2021-06-05 03:51:52,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 03:51:52,738 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:52,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:52,739 INFO L225 Difference]: With dead ends: 483 [2021-06-05 03:51:52,739 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 03:51:52,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 198.7ms TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 03:51:52,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 03:51:52,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 348. [2021-06-05 03:51:52,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.809798270893372) internal successors, (975), 347 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 975 transitions. [2021-06-05 03:51:52,744 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 975 transitions. Word has length 18 [2021-06-05 03:51:52,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:52,744 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 975 transitions. [2021-06-05 03:51:52,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:52,744 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 975 transitions. [2021-06-05 03:51:52,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:52,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:52,745 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:52,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 03:51:52,960 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:52,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:52,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1656289961, now seen corresponding path program 73 times [2021-06-05 03:51:52,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:52,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65993565] [2021-06-05 03:51:52,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:52,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:52,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65993565] [2021-06-05 03:51:52,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65993565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:52,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657113220] [2021-06-05 03:51:52,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:53,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:53,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:53,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657113220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:53,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:53,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 03:51:53,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535340141] [2021-06-05 03:51:53,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:51:53,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:53,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:51:53,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:51:53,090 INFO L87 Difference]: Start difference. First operand 348 states and 975 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:53,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:53,323 INFO L93 Difference]: Finished difference Result 521 states and 1344 transitions. [2021-06-05 03:51:53,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:51:53,324 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:53,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:53,325 INFO L225 Difference]: With dead ends: 521 [2021-06-05 03:51:53,325 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 03:51:53,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 199.2ms TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2021-06-05 03:51:53,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 03:51:53,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 368. [2021-06-05 03:51:53,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.8147138964577656) internal successors, (1033), 367 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:53,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1033 transitions. [2021-06-05 03:51:53,329 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1033 transitions. Word has length 18 [2021-06-05 03:51:53,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:53,329 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1033 transitions. [2021-06-05 03:51:53,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:53,329 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1033 transitions. [2021-06-05 03:51:53,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:53,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:53,330 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:53,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:53,545 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:53,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:53,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1268731953, now seen corresponding path program 74 times [2021-06-05 03:51:53,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:53,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005204587] [2021-06-05 03:51:53,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:53,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:53,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005204587] [2021-06-05 03:51:53,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005204587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:53,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891965171] [2021-06-05 03:51:53,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:53,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:53,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:53,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:53,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:53,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891965171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:53,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:53,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 03:51:53,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081159103] [2021-06-05 03:51:53,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:51:53,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:53,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:51:53,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:53,667 INFO L87 Difference]: Start difference. First operand 368 states and 1033 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:53,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:53,836 INFO L93 Difference]: Finished difference Result 613 states and 1567 transitions. [2021-06-05 03:51:53,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:51:53,836 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:53,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:53,837 INFO L225 Difference]: With dead ends: 613 [2021-06-05 03:51:53,837 INFO L226 Difference]: Without dead ends: 613 [2021-06-05 03:51:53,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=230, Invalid=472, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:51:53,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-05 03:51:53,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 413. [2021-06-05 03:51:53,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.8567961165048543) internal successors, (1177), 412 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:53,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1177 transitions. [2021-06-05 03:51:53,843 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1177 transitions. Word has length 18 [2021-06-05 03:51:53,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:53,843 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1177 transitions. [2021-06-05 03:51:53,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:53,843 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1177 transitions. [2021-06-05 03:51:53,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:53,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:53,843 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:54,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 03:51:54,054 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:54,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:54,054 INFO L82 PathProgramCache]: Analyzing trace with hash -424946089, now seen corresponding path program 75 times [2021-06-05 03:51:54,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:54,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141172923] [2021-06-05 03:51:54,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:54,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:54,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:54,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141172923] [2021-06-05 03:51:54,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141172923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:54,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932618954] [2021-06-05 03:51:54,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:54,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:51:54,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:54,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:54,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:54,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932618954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:54,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:54,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-05 03:51:54,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348959111] [2021-06-05 03:51:54,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:54,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:54,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:54,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:54,174 INFO L87 Difference]: Start difference. First operand 413 states and 1177 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:54,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:54,347 INFO L93 Difference]: Finished difference Result 723 states and 1864 transitions. [2021-06-05 03:51:54,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:51:54,347 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:54,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:54,348 INFO L225 Difference]: With dead ends: 723 [2021-06-05 03:51:54,348 INFO L226 Difference]: Without dead ends: 723 [2021-06-05 03:51:54,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 148.7ms TimeCoverageRelationStatistics Valid=226, Invalid=374, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:51:54,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-06-05 03:51:54,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 473. [2021-06-05 03:51:54,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.9110169491525424) internal successors, (1374), 472 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:54,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1374 transitions. [2021-06-05 03:51:54,355 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1374 transitions. Word has length 18 [2021-06-05 03:51:54,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:54,355 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1374 transitions. [2021-06-05 03:51:54,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:54,355 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1374 transitions. [2021-06-05 03:51:54,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:54,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:54,356 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:54,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 03:51:54,556 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:54,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:54,556 INFO L82 PathProgramCache]: Analyzing trace with hash 146508717, now seen corresponding path program 76 times [2021-06-05 03:51:54,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:54,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796717160] [2021-06-05 03:51:54,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:54,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:54,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796717160] [2021-06-05 03:51:54,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796717160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:54,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540027542] [2021-06-05 03:51:54,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:54,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:51:54,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:54,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:54,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:54,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:54,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540027542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:54,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:54,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-05 03:51:54,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591439554] [2021-06-05 03:51:54,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:54,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:54,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:54,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:54,658 INFO L87 Difference]: Start difference. First operand 473 states and 1374 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:54,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:54,919 INFO L93 Difference]: Finished difference Result 693 states and 1787 transitions. [2021-06-05 03:51:54,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 03:51:54,919 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:54,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:54,920 INFO L225 Difference]: With dead ends: 693 [2021-06-05 03:51:54,920 INFO L226 Difference]: Without dead ends: 687 [2021-06-05 03:51:54,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 221.5ms TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 03:51:54,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-06-05 03:51:54,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 463. [2021-06-05 03:51:54,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.8896103896103895) internal successors, (1335), 462 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:54,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1335 transitions. [2021-06-05 03:51:54,927 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1335 transitions. Word has length 18 [2021-06-05 03:51:54,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:54,927 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1335 transitions. [2021-06-05 03:51:54,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:54,927 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1335 transitions. [2021-06-05 03:51:54,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:54,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:54,928 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:55,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:55,145 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:55,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:55,145 INFO L82 PathProgramCache]: Analyzing trace with hash 681738519, now seen corresponding path program 77 times [2021-06-05 03:51:55,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:55,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500236122] [2021-06-05 03:51:55,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:55,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:55,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:55,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500236122] [2021-06-05 03:51:55,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500236122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:55,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491951364] [2021-06-05 03:51:55,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:55,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:55,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:55,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:55,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:55,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:55,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491951364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:55,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:55,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 03:51:55,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411848253] [2021-06-05 03:51:55,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:51:55,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:55,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:51:55,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:55,255 INFO L87 Difference]: Start difference. First operand 463 states and 1335 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:55,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:55,589 INFO L93 Difference]: Finished difference Result 706 states and 1819 transitions. [2021-06-05 03:51:55,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 03:51:55,589 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:55,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:55,590 INFO L225 Difference]: With dead ends: 706 [2021-06-05 03:51:55,590 INFO L226 Difference]: Without dead ends: 694 [2021-06-05 03:51:55,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 243.5ms TimeCoverageRelationStatistics Valid=387, Invalid=873, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 03:51:55,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-06-05 03:51:55,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 476. [2021-06-05 03:51:55,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.903157894736842) internal successors, (1379), 475 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:55,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1379 transitions. [2021-06-05 03:51:55,598 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1379 transitions. Word has length 18 [2021-06-05 03:51:55,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:55,598 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1379 transitions. [2021-06-05 03:51:55,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:55,598 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1379 transitions. [2021-06-05 03:51:55,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 03:51:55,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:55,598 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:55,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:55,816 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:55,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:55,816 INFO L82 PathProgramCache]: Analyzing trace with hash 93993197, now seen corresponding path program 78 times [2021-06-05 03:51:55,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:55,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445418970] [2021-06-05 03:51:55,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:55,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:55,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:55,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445418970] [2021-06-05 03:51:55,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445418970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:55,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046813106] [2021-06-05 03:51:55,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:55,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:51:55,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:55,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:51:55,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:55,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046813106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:55,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:55,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 03:51:55,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874757444] [2021-06-05 03:51:55,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:51:55,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:55,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:51:55,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:51:55,952 INFO L87 Difference]: Start difference. First operand 476 states and 1379 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:56,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:56,177 INFO L93 Difference]: Finished difference Result 674 states and 1783 transitions. [2021-06-05 03:51:56,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 03:51:56,177 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 03:51:56,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:56,178 INFO L225 Difference]: With dead ends: 674 [2021-06-05 03:51:56,178 INFO L226 Difference]: Without dead ends: 656 [2021-06-05 03:51:56,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 221.9ms TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 03:51:56,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-06-05 03:51:56,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 498. [2021-06-05 03:51:56,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 2.9014084507042255) internal successors, (1442), 497 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:56,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1442 transitions. [2021-06-05 03:51:56,185 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1442 transitions. Word has length 18 [2021-06-05 03:51:56,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:56,185 INFO L482 AbstractCegarLoop]: Abstraction has 498 states and 1442 transitions. [2021-06-05 03:51:56,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:56,185 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1442 transitions. [2021-06-05 03:51:56,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:51:56,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:56,186 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:56,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:56,387 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:56,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:56,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1452121605, now seen corresponding path program 79 times [2021-06-05 03:51:56,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:56,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156315363] [2021-06-05 03:51:56,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:56,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:56,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156315363] [2021-06-05 03:51:56,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156315363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:56,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066868606] [2021-06-05 03:51:56,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:56,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:51:56,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:56,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066868606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:56,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:56,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 03:51:56,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078205910] [2021-06-05 03:51:56,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:51:56,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:56,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:51:56,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:56,642 INFO L87 Difference]: Start difference. First operand 498 states and 1442 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:56,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:56,834 INFO L93 Difference]: Finished difference Result 678 states and 1761 transitions. [2021-06-05 03:51:56,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:51:56,834 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:51:56,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:56,835 INFO L225 Difference]: With dead ends: 678 [2021-06-05 03:51:56,835 INFO L226 Difference]: Without dead ends: 655 [2021-06-05 03:51:56,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 207.2ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:51:56,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-05 03:51:56,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 531. [2021-06-05 03:51:56,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 2.8679245283018866) internal successors, (1520), 530 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:56,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1520 transitions. [2021-06-05 03:51:56,842 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1520 transitions. Word has length 19 [2021-06-05 03:51:56,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:56,842 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1520 transitions. [2021-06-05 03:51:56,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:56,842 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1520 transitions. [2021-06-05 03:51:56,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:51:56,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:56,843 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:57,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:57,057 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:57,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:57,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1378493247, now seen corresponding path program 80 times [2021-06-05 03:51:57,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:57,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935796568] [2021-06-05 03:51:57,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:57,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:57,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:57,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935796568] [2021-06-05 03:51:57,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935796568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:57,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120494868] [2021-06-05 03:51:57,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:51:57,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:57,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:57,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:51:57,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:57,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120494868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:57,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:57,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 03:51:57,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139882966] [2021-06-05 03:51:57,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:51:57,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:57,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:51:57,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:57,240 INFO L87 Difference]: Start difference. First operand 531 states and 1520 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:57,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:57,379 INFO L93 Difference]: Finished difference Result 714 states and 1853 transitions. [2021-06-05 03:51:57,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:51:57,379 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:51:57,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:57,380 INFO L225 Difference]: With dead ends: 714 [2021-06-05 03:51:57,380 INFO L226 Difference]: Without dead ends: 707 [2021-06-05 03:51:57,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:51:57,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-06-05 03:51:57,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 555. [2021-06-05 03:51:57,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.895306859205776) internal successors, (1604), 554 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:57,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1604 transitions. [2021-06-05 03:51:57,390 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1604 transitions. Word has length 19 [2021-06-05 03:51:57,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:57,390 INFO L482 AbstractCegarLoop]: Abstraction has 555 states and 1604 transitions. [2021-06-05 03:51:57,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:57,390 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1604 transitions. [2021-06-05 03:51:57,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:51:57,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:57,391 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:57,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 03:51:57,597 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:57,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:57,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1301771325, now seen corresponding path program 81 times [2021-06-05 03:51:57,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:57,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961650189] [2021-06-05 03:51:57,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:57,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:57,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:57,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961650189] [2021-06-05 03:51:57,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961650189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:57,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681671568] [2021-06-05 03:51:57,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:57,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:51:57,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:57,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:51:57,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:57,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681671568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:57,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:57,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 03:51:57,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855147936] [2021-06-05 03:51:57,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:51:57,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:57,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:51:57,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:57,763 INFO L87 Difference]: Start difference. First operand 555 states and 1604 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:57,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:57,926 INFO L93 Difference]: Finished difference Result 700 states and 1833 transitions. [2021-06-05 03:51:57,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:51:57,927 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:51:57,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:57,928 INFO L225 Difference]: With dead ends: 700 [2021-06-05 03:51:57,928 INFO L226 Difference]: Without dead ends: 684 [2021-06-05 03:51:57,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 154.2ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:51:57,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-06-05 03:51:57,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 542. [2021-06-05 03:51:57,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.8927911275415896) internal successors, (1565), 541 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:57,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1565 transitions. [2021-06-05 03:51:57,935 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1565 transitions. Word has length 19 [2021-06-05 03:51:57,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:57,935 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1565 transitions. [2021-06-05 03:51:57,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:57,935 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1565 transitions. [2021-06-05 03:51:57,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:51:57,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:57,936 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:58,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 03:51:58,137 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:58,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:58,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1949948053, now seen corresponding path program 82 times [2021-06-05 03:51:58,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:58,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368814358] [2021-06-05 03:51:58,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:58,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:58,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:58,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368814358] [2021-06-05 03:51:58,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368814358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:58,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081832254] [2021-06-05 03:51:58,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:58,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:51:58,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:58,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:51:58,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:58,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:58,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081832254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:58,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:58,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 03:51:58,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382075337] [2021-06-05 03:51:58,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:51:58,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:58,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:51:58,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:58,325 INFO L87 Difference]: Start difference. First operand 542 states and 1565 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:58,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:58,501 INFO L93 Difference]: Finished difference Result 698 states and 1814 transitions. [2021-06-05 03:51:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:51:58,502 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:51:58,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:58,503 INFO L225 Difference]: With dead ends: 698 [2021-06-05 03:51:58,503 INFO L226 Difference]: Without dead ends: 691 [2021-06-05 03:51:58,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 164.7ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:51:58,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-06-05 03:51:58,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 542. [2021-06-05 03:51:58,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.8927911275415896) internal successors, (1565), 541 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:58,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1565 transitions. [2021-06-05 03:51:58,511 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1565 transitions. Word has length 19 [2021-06-05 03:51:58,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:58,511 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1565 transitions. [2021-06-05 03:51:58,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:58,511 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1565 transitions. [2021-06-05 03:51:58,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:51:58,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:58,512 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:58,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:58,729 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:58,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:58,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1809789441, now seen corresponding path program 83 times [2021-06-05 03:51:58,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:58,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316698542] [2021-06-05 03:51:58,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:58,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:58,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:58,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316698542] [2021-06-05 03:51:58,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316698542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:58,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774629841] [2021-06-05 03:51:58,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:58,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:51:58,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:58,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:51:58,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:58,907 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:58,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774629841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:58,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:58,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 03:51:58,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594009540] [2021-06-05 03:51:58,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:51:58,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:58,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:51:58,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:58,908 INFO L87 Difference]: Start difference. First operand 542 states and 1565 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:59,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:59,091 INFO L93 Difference]: Finished difference Result 664 states and 1755 transitions. [2021-06-05 03:51:59,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:51:59,092 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:51:59,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:59,093 INFO L225 Difference]: With dead ends: 664 [2021-06-05 03:51:59,093 INFO L226 Difference]: Without dead ends: 657 [2021-06-05 03:51:59,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:51:59,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-06-05 03:51:59,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 542. [2021-06-05 03:51:59,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.8927911275415896) internal successors, (1565), 541 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:59,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1565 transitions. [2021-06-05 03:51:59,100 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1565 transitions. Word has length 19 [2021-06-05 03:51:59,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:59,100 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1565 transitions. [2021-06-05 03:51:59,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:59,100 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1565 transitions. [2021-06-05 03:51:59,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:51:59,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:59,101 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:59,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 03:51:59,305 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:59,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:59,306 INFO L82 PathProgramCache]: Analyzing trace with hash -310264069, now seen corresponding path program 84 times [2021-06-05 03:51:59,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:59,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977736934] [2021-06-05 03:51:59,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:59,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:59,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:59,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977736934] [2021-06-05 03:51:59,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977736934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:59,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092965970] [2021-06-05 03:51:59,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:59,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:51:59,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:59,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:51:59,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:59,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092965970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:59,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:59,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 03:51:59,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436572105] [2021-06-05 03:51:59,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:51:59,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:59,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:51:59,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:51:59,517 INFO L87 Difference]: Start difference. First operand 542 states and 1565 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:59,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:59,640 INFO L93 Difference]: Finished difference Result 660 states and 1787 transitions. [2021-06-05 03:51:59,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:51:59,640 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:51:59,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:59,642 INFO L225 Difference]: With dead ends: 660 [2021-06-05 03:51:59,642 INFO L226 Difference]: Without dead ends: 653 [2021-06-05 03:51:59,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:51:59,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-06-05 03:51:59,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 555. [2021-06-05 03:51:59,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.9097472924187726) internal successors, (1612), 554 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:59,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1612 transitions. [2021-06-05 03:51:59,648 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1612 transitions. Word has length 19 [2021-06-05 03:51:59,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:59,648 INFO L482 AbstractCegarLoop]: Abstraction has 555 states and 1612 transitions. [2021-06-05 03:51:59,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:59,648 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1612 transitions. [2021-06-05 03:51:59,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:51:59,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:59,649 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:59,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 03:51:59,849 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:59,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:59,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1304438655, now seen corresponding path program 85 times [2021-06-05 03:51:59,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:59,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174206208] [2021-06-05 03:51:59,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:59,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:59,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174206208] [2021-06-05 03:51:59,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174206208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:59,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55711028] [2021-06-05 03:51:59,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:59,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:51:59,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:00,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:00,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55711028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:00,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:00,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 03:52:00,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837712723] [2021-06-05 03:52:00,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:00,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:00,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:00,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:00,041 INFO L87 Difference]: Start difference. First operand 555 states and 1612 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:00,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:00,167 INFO L93 Difference]: Finished difference Result 661 states and 1784 transitions. [2021-06-05 03:52:00,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:52:00,168 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:52:00,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:00,169 INFO L225 Difference]: With dead ends: 661 [2021-06-05 03:52:00,169 INFO L226 Difference]: Without dead ends: 652 [2021-06-05 03:52:00,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 149.9ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:00,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-05 03:52:00,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 555. [2021-06-05 03:52:00,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.904332129963899) internal successors, (1609), 554 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:00,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1609 transitions. [2021-06-05 03:52:00,175 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1609 transitions. Word has length 19 [2021-06-05 03:52:00,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:00,175 INFO L482 AbstractCegarLoop]: Abstraction has 555 states and 1609 transitions. [2021-06-05 03:52:00,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:00,175 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1609 transitions. [2021-06-05 03:52:00,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:52:00,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:00,176 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:00,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:00,392 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:00,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:00,392 INFO L82 PathProgramCache]: Analyzing trace with hash -774855173, now seen corresponding path program 86 times [2021-06-05 03:52:00,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:00,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508391940] [2021-06-05 03:52:00,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:00,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:00,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:00,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508391940] [2021-06-05 03:52:00,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508391940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:00,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637293365] [2021-06-05 03:52:00,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:00,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:00,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:00,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:00,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:00,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637293365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:00,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:00,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 03:52:00,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496157913] [2021-06-05 03:52:00,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:00,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:00,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:00,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:00,592 INFO L87 Difference]: Start difference. First operand 555 states and 1609 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:00,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:00,727 INFO L93 Difference]: Finished difference Result 635 states and 1737 transitions. [2021-06-05 03:52:00,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:52:00,727 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:52:00,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:00,728 INFO L225 Difference]: With dead ends: 635 [2021-06-05 03:52:00,728 INFO L226 Difference]: Without dead ends: 628 [2021-06-05 03:52:00,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 160.1ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:00,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-06-05 03:52:00,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 555. [2021-06-05 03:52:00,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.904332129963899) internal successors, (1609), 554 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:00,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1609 transitions. [2021-06-05 03:52:00,737 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1609 transitions. Word has length 19 [2021-06-05 03:52:00,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:00,737 INFO L482 AbstractCegarLoop]: Abstraction has 555 states and 1609 transitions. [2021-06-05 03:52:00,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:00,737 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1609 transitions. [2021-06-05 03:52:00,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:52:00,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:00,739 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:00,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:00,957 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:00,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:00,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1122133313, now seen corresponding path program 87 times [2021-06-05 03:52:00,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:00,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844515563] [2021-06-05 03:52:00,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:01,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:01,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:01,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844515563] [2021-06-05 03:52:01,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844515563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:01,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471872959] [2021-06-05 03:52:01,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:01,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:52:01,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:01,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:01,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:01,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471872959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:01,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:01,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 03:52:01,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865352503] [2021-06-05 03:52:01,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:01,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:01,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:01,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:01,139 INFO L87 Difference]: Start difference. First operand 555 states and 1609 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:01,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:01,323 INFO L93 Difference]: Finished difference Result 776 states and 2043 transitions. [2021-06-05 03:52:01,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:52:01,324 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:52:01,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:01,325 INFO L225 Difference]: With dead ends: 776 [2021-06-05 03:52:01,325 INFO L226 Difference]: Without dead ends: 759 [2021-06-05 03:52:01,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 170.0ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:52:01,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-06-05 03:52:01,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 594. [2021-06-05 03:52:01,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 2.9409780775716694) internal successors, (1744), 593 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:01,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1744 transitions. [2021-06-05 03:52:01,332 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1744 transitions. Word has length 19 [2021-06-05 03:52:01,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:01,332 INFO L482 AbstractCegarLoop]: Abstraction has 594 states and 1744 transitions. [2021-06-05 03:52:01,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:01,332 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1744 transitions. [2021-06-05 03:52:01,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:52:01,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:01,333 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:01,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 03:52:01,544 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:01,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:01,545 INFO L82 PathProgramCache]: Analyzing trace with hash 492569411, now seen corresponding path program 88 times [2021-06-05 03:52:01,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:01,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297747044] [2021-06-05 03:52:01,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:01,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:01,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:01,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:01,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297747044] [2021-06-05 03:52:01,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297747044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:01,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797821842] [2021-06-05 03:52:01,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:01,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:01,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:01,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:01,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:01,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797821842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:01,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:01,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 03:52:01,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611204743] [2021-06-05 03:52:01,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:01,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:01,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:01,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:01,733 INFO L87 Difference]: Start difference. First operand 594 states and 1744 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:01,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:01,885 INFO L93 Difference]: Finished difference Result 774 states and 2026 transitions. [2021-06-05 03:52:01,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:52:01,885 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:52:01,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:01,887 INFO L225 Difference]: With dead ends: 774 [2021-06-05 03:52:01,887 INFO L226 Difference]: Without dead ends: 756 [2021-06-05 03:52:01,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 152.2ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:52:01,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-06-05 03:52:01,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 583. [2021-06-05 03:52:01,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.922680412371134) internal successors, (1701), 582 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:01,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1701 transitions. [2021-06-05 03:52:01,901 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1701 transitions. Word has length 19 [2021-06-05 03:52:01,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:01,901 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1701 transitions. [2021-06-05 03:52:01,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:01,901 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1701 transitions. [2021-06-05 03:52:01,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:52:01,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:01,902 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:02,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 03:52:02,109 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:02,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:02,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1586724417, now seen corresponding path program 89 times [2021-06-05 03:52:02,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:02,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949495211] [2021-06-05 03:52:02,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:02,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:02,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:02,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949495211] [2021-06-05 03:52:02,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949495211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:02,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377945800] [2021-06-05 03:52:02,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:02,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:52:02,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:02,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:02,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:02,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377945800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:02,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:02,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 03:52:02,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196323858] [2021-06-05 03:52:02,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:02,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:02,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:02,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:02,284 INFO L87 Difference]: Start difference. First operand 583 states and 1701 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:02,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:02,461 INFO L93 Difference]: Finished difference Result 744 states and 1952 transitions. [2021-06-05 03:52:02,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:52:02,461 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:52:02,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:02,462 INFO L225 Difference]: With dead ends: 744 [2021-06-05 03:52:02,462 INFO L226 Difference]: Without dead ends: 722 [2021-06-05 03:52:02,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 158.3ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:52:02,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-06-05 03:52:02,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 580. [2021-06-05 03:52:02,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 2.9153713298791017) internal successors, (1688), 579 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:02,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1688 transitions. [2021-06-05 03:52:02,468 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1688 transitions. Word has length 19 [2021-06-05 03:52:02,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:02,468 INFO L482 AbstractCegarLoop]: Abstraction has 580 states and 1688 transitions. [2021-06-05 03:52:02,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:02,469 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1688 transitions. [2021-06-05 03:52:02,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:52:02,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:02,469 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:02,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:02,685 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:02,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:02,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1620323645, now seen corresponding path program 90 times [2021-06-05 03:52:02,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:02,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747231036] [2021-06-05 03:52:02,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:02,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:02,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:02,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747231036] [2021-06-05 03:52:02,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747231036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:02,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388262297] [2021-06-05 03:52:02,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:02,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:52:02,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:02,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:02,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:02,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:02,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388262297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:02,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:02,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 03:52:02,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665661282] [2021-06-05 03:52:02,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:02,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:02,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:02,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:02,856 INFO L87 Difference]: Start difference. First operand 580 states and 1688 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:03,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:03,027 INFO L93 Difference]: Finished difference Result 695 states and 1864 transitions. [2021-06-05 03:52:03,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:52:03,028 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:52:03,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:03,029 INFO L225 Difference]: With dead ends: 695 [2021-06-05 03:52:03,029 INFO L226 Difference]: Without dead ends: 688 [2021-06-05 03:52:03,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 163.0ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:52:03,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-06-05 03:52:03,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 582. [2021-06-05 03:52:03,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 2.910499139414802) internal successors, (1691), 581 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:03,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1691 transitions. [2021-06-05 03:52:03,037 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1691 transitions. Word has length 19 [2021-06-05 03:52:03,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:03,037 INFO L482 AbstractCegarLoop]: Abstraction has 582 states and 1691 transitions. [2021-06-05 03:52:03,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:03,038 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1691 transitions. [2021-06-05 03:52:03,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:52:03,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:03,038 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:03,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:03,249 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:03,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:03,249 INFO L82 PathProgramCache]: Analyzing trace with hash -592690923, now seen corresponding path program 91 times [2021-06-05 03:52:03,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:03,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633409533] [2021-06-05 03:52:03,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:03,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:03,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633409533] [2021-06-05 03:52:03,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633409533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:03,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148852267] [2021-06-05 03:52:03,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:03,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:03,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:03,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148852267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:03,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:03,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 03:52:03,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532785408] [2021-06-05 03:52:03,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:03,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:03,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:03,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:03,425 INFO L87 Difference]: Start difference. First operand 582 states and 1691 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:03,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:03,535 INFO L93 Difference]: Finished difference Result 647 states and 1795 transitions. [2021-06-05 03:52:03,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:52:03,535 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:52:03,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:03,537 INFO L225 Difference]: With dead ends: 647 [2021-06-05 03:52:03,537 INFO L226 Difference]: Without dead ends: 634 [2021-06-05 03:52:03,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:03,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-06-05 03:52:03,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 577. [2021-06-05 03:52:03,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 2.907986111111111) internal successors, (1675), 576 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:03,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1675 transitions. [2021-06-05 03:52:03,543 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1675 transitions. Word has length 19 [2021-06-05 03:52:03,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:03,543 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1675 transitions. [2021-06-05 03:52:03,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:03,543 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1675 transitions. [2021-06-05 03:52:03,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:52:03,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:03,544 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:03,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 03:52:03,761 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:03,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:03,761 INFO L82 PathProgramCache]: Analyzing trace with hash -520276101, now seen corresponding path program 92 times [2021-06-05 03:52:03,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:03,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531523677] [2021-06-05 03:52:03,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:03,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:03,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:03,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531523677] [2021-06-05 03:52:03,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531523677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:03,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9730371] [2021-06-05 03:52:03,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:03,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:03,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:03,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:03,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:03,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9730371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:03,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:03,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 03:52:03,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223054267] [2021-06-05 03:52:03,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:03,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:03,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:03,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:03,930 INFO L87 Difference]: Start difference. First operand 577 states and 1675 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:04,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:04,105 INFO L93 Difference]: Finished difference Result 798 states and 2119 transitions. [2021-06-05 03:52:04,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:52:04,105 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:52:04,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:04,107 INFO L225 Difference]: With dead ends: 798 [2021-06-05 03:52:04,107 INFO L226 Difference]: Without dead ends: 781 [2021-06-05 03:52:04,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:52:04,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-06-05 03:52:04,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 632. [2021-06-05 03:52:04,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 2.9334389857369256) internal successors, (1851), 631 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:04,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 1851 transitions. [2021-06-05 03:52:04,114 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 1851 transitions. Word has length 19 [2021-06-05 03:52:04,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:04,114 INFO L482 AbstractCegarLoop]: Abstraction has 632 states and 1851 transitions. [2021-06-05 03:52:04,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:04,114 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 1851 transitions. [2021-06-05 03:52:04,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:52:04,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:04,115 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:04,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:04,329 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:04,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:04,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1094426623, now seen corresponding path program 93 times [2021-06-05 03:52:04,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:04,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489264789] [2021-06-05 03:52:04,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:04,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:04,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489264789] [2021-06-05 03:52:04,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489264789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:04,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862929546] [2021-06-05 03:52:04,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:04,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:52:04,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:04,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:04,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:04,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862929546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:04,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:04,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 03:52:04,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980059728] [2021-06-05 03:52:04,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:04,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:04,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:04,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:04,490 INFO L87 Difference]: Start difference. First operand 632 states and 1851 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:04,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:04,658 INFO L93 Difference]: Finished difference Result 796 states and 2104 transitions. [2021-06-05 03:52:04,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:52:04,658 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:52:04,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:04,659 INFO L225 Difference]: With dead ends: 796 [2021-06-05 03:52:04,659 INFO L226 Difference]: Without dead ends: 780 [2021-06-05 03:52:04,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 152.2ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:52:04,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-06-05 03:52:04,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 621. [2021-06-05 03:52:04,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 2.92258064516129) internal successors, (1812), 620 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:04,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1812 transitions. [2021-06-05 03:52:04,667 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1812 transitions. Word has length 19 [2021-06-05 03:52:04,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:04,667 INFO L482 AbstractCegarLoop]: Abstraction has 621 states and 1812 transitions. [2021-06-05 03:52:04,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:04,667 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1812 transitions. [2021-06-05 03:52:04,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:52:04,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:04,667 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:04,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:04,881 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:04,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:04,881 INFO L82 PathProgramCache]: Analyzing trace with hash -984867205, now seen corresponding path program 94 times [2021-06-05 03:52:04,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:04,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40187615] [2021-06-05 03:52:04,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:04,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:04,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:04,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40187615] [2021-06-05 03:52:04,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40187615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:04,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746837226] [2021-06-05 03:52:04,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:04,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:04,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:04,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:04,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:05,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:05,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746837226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:05,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:05,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 03:52:05,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887030438] [2021-06-05 03:52:05,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:05,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:05,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:05,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:05,073 INFO L87 Difference]: Start difference. First operand 621 states and 1812 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:05,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:05,285 INFO L93 Difference]: Finished difference Result 809 states and 2103 transitions. [2021-06-05 03:52:05,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:52:05,285 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:52:05,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:05,287 INFO L225 Difference]: With dead ends: 809 [2021-06-05 03:52:05,287 INFO L226 Difference]: Without dead ends: 791 [2021-06-05 03:52:05,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 178.8ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:52:05,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-06-05 03:52:05,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 614. [2021-06-05 03:52:05,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 2.911908646003263) internal successors, (1785), 613 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:05,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1785 transitions. [2021-06-05 03:52:05,294 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1785 transitions. Word has length 19 [2021-06-05 03:52:05,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:05,294 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 1785 transitions. [2021-06-05 03:52:05,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:05,294 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1785 transitions. [2021-06-05 03:52:05,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:52:05,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:05,295 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:05,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 03:52:05,511 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:05,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:05,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1018466433, now seen corresponding path program 95 times [2021-06-05 03:52:05,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:05,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644288340] [2021-06-05 03:52:05,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:05,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:05,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:05,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644288340] [2021-06-05 03:52:05,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644288340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:05,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612197545] [2021-06-05 03:52:05,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:05,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:52:05,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:05,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:05,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:05,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612197545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:05,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:05,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 03:52:05,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665749951] [2021-06-05 03:52:05,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:05,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:05,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:05,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:05,697 INFO L87 Difference]: Start difference. First operand 614 states and 1785 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:05,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:05,905 INFO L93 Difference]: Finished difference Result 764 states and 2018 transitions. [2021-06-05 03:52:05,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:52:05,905 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:52:05,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:05,906 INFO L225 Difference]: With dead ends: 764 [2021-06-05 03:52:05,906 INFO L226 Difference]: Without dead ends: 744 [2021-06-05 03:52:05,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 185.5ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:52:05,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-06-05 03:52:05,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 607. [2021-06-05 03:52:05,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 2.9141914191419143) internal successors, (1766), 606 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:05,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1766 transitions. [2021-06-05 03:52:05,913 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1766 transitions. Word has length 19 [2021-06-05 03:52:05,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:05,913 INFO L482 AbstractCegarLoop]: Abstraction has 607 states and 1766 transitions. [2021-06-05 03:52:05,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:05,913 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1766 transitions. [2021-06-05 03:52:05,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:52:05,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:05,914 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:06,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:06,115 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:06,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:06,115 INFO L82 PathProgramCache]: Analyzing trace with hash -2060042501, now seen corresponding path program 96 times [2021-06-05 03:52:06,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:06,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445364039] [2021-06-05 03:52:06,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:06,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:06,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:06,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445364039] [2021-06-05 03:52:06,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445364039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:06,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202055444] [2021-06-05 03:52:06,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:06,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:52:06,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:06,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:06,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:06,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:06,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202055444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:06,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:06,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 03:52:06,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816758760] [2021-06-05 03:52:06,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:06,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:06,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:06,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:06,350 INFO L87 Difference]: Start difference. First operand 607 states and 1766 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:06,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:06,556 INFO L93 Difference]: Finished difference Result 713 states and 1927 transitions. [2021-06-05 03:52:06,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:52:06,557 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:52:06,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:06,558 INFO L225 Difference]: With dead ends: 713 [2021-06-05 03:52:06,558 INFO L226 Difference]: Without dead ends: 706 [2021-06-05 03:52:06,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 187.0ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:52:06,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-06-05 03:52:06,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 615. [2021-06-05 03:52:06,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 2.8957654723127035) internal successors, (1778), 614 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:06,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 1778 transitions. [2021-06-05 03:52:06,564 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 1778 transitions. Word has length 19 [2021-06-05 03:52:06,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:06,568 INFO L482 AbstractCegarLoop]: Abstraction has 615 states and 1778 transitions. [2021-06-05 03:52:06,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:06,568 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 1778 transitions. [2021-06-05 03:52:06,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:52:06,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:06,568 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:06,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-06-05 03:52:06,769 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:06,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:06,769 INFO L82 PathProgramCache]: Analyzing trace with hash 323509763, now seen corresponding path program 97 times [2021-06-05 03:52:06,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:06,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885403095] [2021-06-05 03:52:06,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:06,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:06,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885403095] [2021-06-05 03:52:06,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885403095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:06,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525861171] [2021-06-05 03:52:06,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:06,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:06,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:06,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525861171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:06,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:06,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 03:52:06,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288237807] [2021-06-05 03:52:06,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:06,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:06,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:06,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:06,939 INFO L87 Difference]: Start difference. First operand 615 states and 1778 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:07,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:07,071 INFO L93 Difference]: Finished difference Result 753 states and 2034 transitions. [2021-06-05 03:52:07,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:52:07,071 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:52:07,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:07,072 INFO L225 Difference]: With dead ends: 753 [2021-06-05 03:52:07,072 INFO L226 Difference]: Without dead ends: 743 [2021-06-05 03:52:07,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 144.1ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:07,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-06-05 03:52:07,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 627. [2021-06-05 03:52:07,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 2.905750798722045) internal successors, (1819), 626 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:07,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1819 transitions. [2021-06-05 03:52:07,079 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1819 transitions. Word has length 19 [2021-06-05 03:52:07,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:07,079 INFO L482 AbstractCegarLoop]: Abstraction has 627 states and 1819 transitions. [2021-06-05 03:52:07,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:07,079 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1819 transitions. [2021-06-05 03:52:07,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:52:07,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:07,080 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:07,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:07,280 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:07,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:07,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1938212487, now seen corresponding path program 98 times [2021-06-05 03:52:07,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:07,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793912201] [2021-06-05 03:52:07,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:07,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:07,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793912201] [2021-06-05 03:52:07,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793912201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:07,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596512387] [2021-06-05 03:52:07,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:07,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:07,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:07,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:07,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:07,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:07,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596512387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:07,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:07,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 03:52:07,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989929421] [2021-06-05 03:52:07,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:07,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:07,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:07,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:07,448 INFO L87 Difference]: Start difference. First operand 627 states and 1819 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:07,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:07,563 INFO L93 Difference]: Finished difference Result 735 states and 2000 transitions. [2021-06-05 03:52:07,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:52:07,563 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:52:07,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:07,564 INFO L225 Difference]: With dead ends: 735 [2021-06-05 03:52:07,564 INFO L226 Difference]: Without dead ends: 728 [2021-06-05 03:52:07,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:07,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-06-05 03:52:07,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 625. [2021-06-05 03:52:07,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.90224358974359) internal successors, (1811), 624 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:07,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1811 transitions. [2021-06-05 03:52:07,571 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1811 transitions. Word has length 19 [2021-06-05 03:52:07,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:07,571 INFO L482 AbstractCegarLoop]: Abstraction has 625 states and 1811 transitions. [2021-06-05 03:52:07,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:07,571 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1811 transitions. [2021-06-05 03:52:07,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:52:07,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:07,572 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:07,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 03:52:07,785 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:07,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:07,785 INFO L82 PathProgramCache]: Analyzing trace with hash 894964569, now seen corresponding path program 99 times [2021-06-05 03:52:07,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:07,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494832077] [2021-06-05 03:52:07,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:07,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:07,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:07,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494832077] [2021-06-05 03:52:07,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494832077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:07,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947928255] [2021-06-05 03:52:07,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:07,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:52:07,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:07,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:07,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:07,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947928255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:07,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:07,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 03:52:07,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584658872] [2021-06-05 03:52:07,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:07,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:07,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:07,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:07,992 INFO L87 Difference]: Start difference. First operand 625 states and 1811 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:08,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:08,115 INFO L93 Difference]: Finished difference Result 709 states and 1948 transitions. [2021-06-05 03:52:08,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:52:08,115 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:52:08,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:08,116 INFO L225 Difference]: With dead ends: 709 [2021-06-05 03:52:08,116 INFO L226 Difference]: Without dead ends: 702 [2021-06-05 03:52:08,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:08,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-06-05 03:52:08,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 624. [2021-06-05 03:52:08,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 2.9020866773675764) internal successors, (1808), 623 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:08,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1808 transitions. [2021-06-05 03:52:08,123 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1808 transitions. Word has length 19 [2021-06-05 03:52:08,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:08,123 INFO L482 AbstractCegarLoop]: Abstraction has 624 states and 1808 transitions. [2021-06-05 03:52:08,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:08,123 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1808 transitions. [2021-06-05 03:52:08,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:52:08,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:08,124 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:08,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:08,324 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:08,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:08,325 INFO L82 PathProgramCache]: Analyzing trace with hash 711067771, now seen corresponding path program 100 times [2021-06-05 03:52:08,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:08,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827901765] [2021-06-05 03:52:08,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:08,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:08,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827901765] [2021-06-05 03:52:08,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827901765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:08,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055564167] [2021-06-05 03:52:08,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:08,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:08,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:08,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:08,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:08,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055564167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:08,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:08,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 03:52:08,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26754672] [2021-06-05 03:52:08,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:08,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:08,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:08,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:08,492 INFO L87 Difference]: Start difference. First operand 624 states and 1808 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:08,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:08,618 INFO L93 Difference]: Finished difference Result 809 states and 2160 transitions. [2021-06-05 03:52:08,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:52:08,618 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:52:08,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:08,619 INFO L225 Difference]: With dead ends: 809 [2021-06-05 03:52:08,619 INFO L226 Difference]: Without dead ends: 799 [2021-06-05 03:52:08,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:08,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-06-05 03:52:08,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 644. [2021-06-05 03:52:08,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 2.9175738724727838) internal successors, (1876), 643 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:08,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1876 transitions. [2021-06-05 03:52:08,626 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1876 transitions. Word has length 19 [2021-06-05 03:52:08,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:08,626 INFO L482 AbstractCegarLoop]: Abstraction has 644 states and 1876 transitions. [2021-06-05 03:52:08,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:08,627 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1876 transitions. [2021-06-05 03:52:08,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:52:08,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:08,627 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:08,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:08,839 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:08,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:08,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1969196801, now seen corresponding path program 101 times [2021-06-05 03:52:08,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:08,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678793017] [2021-06-05 03:52:08,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:08,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:08,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:08,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678793017] [2021-06-05 03:52:08,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678793017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:08,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338559030] [2021-06-05 03:52:08,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:08,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:52:08,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:08,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:08,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:09,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338559030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:09,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:09,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 03:52:09,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55330591] [2021-06-05 03:52:09,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:09,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:09,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:09,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:09,003 INFO L87 Difference]: Start difference. First operand 644 states and 1876 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:09,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:09,132 INFO L93 Difference]: Finished difference Result 793 states and 2130 transitions. [2021-06-05 03:52:09,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:52:09,132 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:52:09,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:09,133 INFO L225 Difference]: With dead ends: 793 [2021-06-05 03:52:09,133 INFO L226 Difference]: Without dead ends: 786 [2021-06-05 03:52:09,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 127.1ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:09,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-06-05 03:52:09,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 640. [2021-06-05 03:52:09,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 2.9139280125195617) internal successors, (1862), 639 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:09,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1862 transitions. [2021-06-05 03:52:09,140 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1862 transitions. Word has length 19 [2021-06-05 03:52:09,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:09,140 INFO L482 AbstractCegarLoop]: Abstraction has 640 states and 1862 transitions. [2021-06-05 03:52:09,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:09,140 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1862 transitions. [2021-06-05 03:52:09,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:52:09,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:09,141 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:09,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-06-05 03:52:09,341 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:09,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:09,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1282522577, now seen corresponding path program 102 times [2021-06-05 03:52:09,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:09,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494316647] [2021-06-05 03:52:09,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:09,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:09,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:09,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494316647] [2021-06-05 03:52:09,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494316647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:09,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007784479] [2021-06-05 03:52:09,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:09,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:52:09,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:09,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:09,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:09,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007784479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:09,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:09,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 03:52:09,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667764221] [2021-06-05 03:52:09,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:09,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:09,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:09,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:09,525 INFO L87 Difference]: Start difference. First operand 640 states and 1862 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:09,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:09,678 INFO L93 Difference]: Finished difference Result 788 states and 2114 transitions. [2021-06-05 03:52:09,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:52:09,678 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:52:09,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:09,679 INFO L225 Difference]: With dead ends: 788 [2021-06-05 03:52:09,679 INFO L226 Difference]: Without dead ends: 775 [2021-06-05 03:52:09,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 152.4ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:52:09,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-06-05 03:52:09,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 638. [2021-06-05 03:52:09,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.9089481946624804) internal successors, (1853), 637 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:09,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1853 transitions. [2021-06-05 03:52:09,687 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1853 transitions. Word has length 19 [2021-06-05 03:52:09,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:09,687 INFO L482 AbstractCegarLoop]: Abstraction has 638 states and 1853 transitions. [2021-06-05 03:52:09,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:09,687 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1853 transitions. [2021-06-05 03:52:09,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:52:09,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:09,688 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:09,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 03:52:09,888 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:09,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:09,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1817752379, now seen corresponding path program 103 times [2021-06-05 03:52:09,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:09,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445321107] [2021-06-05 03:52:09,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:09,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:09,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:09,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445321107] [2021-06-05 03:52:09,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445321107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:09,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623115275] [2021-06-05 03:52:09,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:52:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:09,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:09,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:10,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623115275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:10,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:10,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 03:52:10,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728760598] [2021-06-05 03:52:10,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:10,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:10,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:10,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:10,075 INFO L87 Difference]: Start difference. First operand 638 states and 1853 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:10,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:10,231 INFO L93 Difference]: Finished difference Result 748 states and 2031 transitions. [2021-06-05 03:52:10,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:52:10,231 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:52:10,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:10,232 INFO L225 Difference]: With dead ends: 748 [2021-06-05 03:52:10,232 INFO L226 Difference]: Without dead ends: 741 [2021-06-05 03:52:10,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 167.0ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:52:10,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-06-05 03:52:10,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 636. [2021-06-05 03:52:10,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 2.9086614173228345) internal successors, (1847), 635 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:10,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1847 transitions. [2021-06-05 03:52:10,239 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1847 transitions. Word has length 19 [2021-06-05 03:52:10,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:10,239 INFO L482 AbstractCegarLoop]: Abstraction has 636 states and 1847 transitions. [2021-06-05 03:52:10,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:10,239 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1847 transitions. [2021-06-05 03:52:10,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:10,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:10,242 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:10,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:10,449 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:10,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:10,449 INFO L82 PathProgramCache]: Analyzing trace with hash -2039469541, now seen corresponding path program 104 times [2021-06-05 03:52:10,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:10,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384347763] [2021-06-05 03:52:10,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:10,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:10,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384347763] [2021-06-05 03:52:10,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384347763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:10,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267408269] [2021-06-05 03:52:10,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:10,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:10,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:10,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:10,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:10,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:10,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267408269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:10,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:10,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 03:52:10,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346657723] [2021-06-05 03:52:10,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:52:10,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:10,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:52:10,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:52:10,560 INFO L87 Difference]: Start difference. First operand 636 states and 1847 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:10,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:10,641 INFO L93 Difference]: Finished difference Result 972 states and 2745 transitions. [2021-06-05 03:52:10,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:52:10,641 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:10,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:10,642 INFO L225 Difference]: With dead ends: 972 [2021-06-05 03:52:10,642 INFO L226 Difference]: Without dead ends: 955 [2021-06-05 03:52:10,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:52:10,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-06-05 03:52:10,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 631. [2021-06-05 03:52:10,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 2.9158730158730157) internal successors, (1837), 630 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:10,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1837 transitions. [2021-06-05 03:52:10,650 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1837 transitions. Word has length 20 [2021-06-05 03:52:10,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:10,650 INFO L482 AbstractCegarLoop]: Abstraction has 631 states and 1837 transitions. [2021-06-05 03:52:10,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:10,650 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1837 transitions. [2021-06-05 03:52:10,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:10,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:10,651 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:10,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:10,857 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:10,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:10,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1555544053, now seen corresponding path program 105 times [2021-06-05 03:52:10,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:10,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744833190] [2021-06-05 03:52:10,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:10,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:10,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:10,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744833190] [2021-06-05 03:52:10,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744833190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:10,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023455070] [2021-06-05 03:52:10,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:10,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:52:10,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:10,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:10,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:11,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023455070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:11,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:11,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 03:52:11,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36500866] [2021-06-05 03:52:11,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:52:11,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:11,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:52:11,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:52:11,002 INFO L87 Difference]: Start difference. First operand 631 states and 1837 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:11,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:11,121 INFO L93 Difference]: Finished difference Result 996 states and 2821 transitions. [2021-06-05 03:52:11,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:52:11,121 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:11,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:11,122 INFO L225 Difference]: With dead ends: 996 [2021-06-05 03:52:11,122 INFO L226 Difference]: Without dead ends: 996 [2021-06-05 03:52:11,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:52:11,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-06-05 03:52:11,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 650. [2021-06-05 03:52:11,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.9183359013867487) internal successors, (1894), 649 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:11,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1894 transitions. [2021-06-05 03:52:11,130 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1894 transitions. Word has length 20 [2021-06-05 03:52:11,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:11,131 INFO L482 AbstractCegarLoop]: Abstraction has 650 states and 1894 transitions. [2021-06-05 03:52:11,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:11,131 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1894 transitions. [2021-06-05 03:52:11,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:11,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:11,133 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:11,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:11,345 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:11,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:11,345 INFO L82 PathProgramCache]: Analyzing trace with hash 946430223, now seen corresponding path program 106 times [2021-06-05 03:52:11,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:11,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031809610] [2021-06-05 03:52:11,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:11,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:11,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:11,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031809610] [2021-06-05 03:52:11,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031809610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:11,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043076648] [2021-06-05 03:52:11,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:11,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:11,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:11,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:11,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:11,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043076648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:11,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:11,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 03:52:11,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748388353] [2021-06-05 03:52:11,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:11,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:11,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:11,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:11,470 INFO L87 Difference]: Start difference. First operand 650 states and 1894 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:11,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:11,735 INFO L93 Difference]: Finished difference Result 1332 states and 3575 transitions. [2021-06-05 03:52:11,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 03:52:11,735 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:11,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:11,737 INFO L225 Difference]: With dead ends: 1332 [2021-06-05 03:52:11,737 INFO L226 Difference]: Without dead ends: 1326 [2021-06-05 03:52:11,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 228.9ms TimeCoverageRelationStatistics Valid=424, Invalid=836, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 03:52:11,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-06-05 03:52:11,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 787. [2021-06-05 03:52:11,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.0063613231552164) internal successors, (2363), 786 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:11,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2363 transitions. [2021-06-05 03:52:11,747 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2363 transitions. Word has length 20 [2021-06-05 03:52:11,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:11,747 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 2363 transitions. [2021-06-05 03:52:11,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:11,747 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2363 transitions. [2021-06-05 03:52:11,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:11,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:11,748 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:11,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-06-05 03:52:11,949 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:11,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:11,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1517885029, now seen corresponding path program 107 times [2021-06-05 03:52:11,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:11,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501394313] [2021-06-05 03:52:11,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:11,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:11,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501394313] [2021-06-05 03:52:11,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501394313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:11,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249555877] [2021-06-05 03:52:11,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:12,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:52:12,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:12,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:12,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:12,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:12,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249555877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:12,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:12,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 03:52:12,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751693700] [2021-06-05 03:52:12,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:12,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:12,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:12,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:12,073 INFO L87 Difference]: Start difference. First operand 787 states and 2363 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:12,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:12,393 INFO L93 Difference]: Finished difference Result 1321 states and 3538 transitions. [2021-06-05 03:52:12,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 03:52:12,393 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:12,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:12,394 INFO L225 Difference]: With dead ends: 1321 [2021-06-05 03:52:12,394 INFO L226 Difference]: Without dead ends: 1315 [2021-06-05 03:52:12,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 272.4ms TimeCoverageRelationStatistics Valid=487, Invalid=1405, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 03:52:12,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-06-05 03:52:12,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 729. [2021-06-05 03:52:12,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 2.9464285714285716) internal successors, (2145), 728 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:12,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2145 transitions. [2021-06-05 03:52:12,404 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2145 transitions. Word has length 20 [2021-06-05 03:52:12,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:12,404 INFO L482 AbstractCegarLoop]: Abstraction has 729 states and 2145 transitions. [2021-06-05 03:52:12,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:12,404 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2145 transitions. [2021-06-05 03:52:12,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:12,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:12,405 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:12,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 03:52:12,605 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:12,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:12,606 INFO L82 PathProgramCache]: Analyzing trace with hash -413686517, now seen corresponding path program 108 times [2021-06-05 03:52:12,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:12,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219115146] [2021-06-05 03:52:12,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:12,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:12,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219115146] [2021-06-05 03:52:12,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219115146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:12,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381478412] [2021-06-05 03:52:12,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:12,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:52:12,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:12,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:12,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:12,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:12,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381478412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:12,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:12,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 03:52:12,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551196456] [2021-06-05 03:52:12,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:12,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:12,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:12,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:12,731 INFO L87 Difference]: Start difference. First operand 729 states and 2145 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:13,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:13,082 INFO L93 Difference]: Finished difference Result 1177 states and 3102 transitions. [2021-06-05 03:52:13,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 03:52:13,082 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:13,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:13,084 INFO L225 Difference]: With dead ends: 1177 [2021-06-05 03:52:13,084 INFO L226 Difference]: Without dead ends: 1177 [2021-06-05 03:52:13,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 280.6ms TimeCoverageRelationStatistics Valid=597, Invalid=1043, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 03:52:13,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-06-05 03:52:13,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 767. [2021-06-05 03:52:13,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 2.971279373368146) internal successors, (2276), 766 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:13,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2276 transitions. [2021-06-05 03:52:13,093 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2276 transitions. Word has length 20 [2021-06-05 03:52:13,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:13,093 INFO L482 AbstractCegarLoop]: Abstraction has 767 states and 2276 transitions. [2021-06-05 03:52:13,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:13,094 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2276 transitions. [2021-06-05 03:52:13,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:13,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:13,094 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:13,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 03:52:13,295 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:13,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:13,295 INFO L82 PathProgramCache]: Analyzing trace with hash -878277621, now seen corresponding path program 109 times [2021-06-05 03:52:13,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:13,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676843729] [2021-06-05 03:52:13,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:13,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:13,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:13,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676843729] [2021-06-05 03:52:13,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676843729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:13,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667522753] [2021-06-05 03:52:13,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:13,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:13,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:13,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:13,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:13,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667522753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:13,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:13,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 03:52:13,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668815204] [2021-06-05 03:52:13,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:13,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:13,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:13,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:13,412 INFO L87 Difference]: Start difference. First operand 767 states and 2276 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:13,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:13,768 INFO L93 Difference]: Finished difference Result 1009 states and 2756 transitions. [2021-06-05 03:52:13,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 03:52:13,768 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:13,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:13,769 INFO L225 Difference]: With dead ends: 1009 [2021-06-05 03:52:13,769 INFO L226 Difference]: Without dead ends: 1005 [2021-06-05 03:52:13,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 286.0ms TimeCoverageRelationStatistics Valid=781, Invalid=1475, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 03:52:13,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-06-05 03:52:13,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 699. [2021-06-05 03:52:13,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 2.9283667621776504) internal successors, (2044), 698 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:13,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2044 transitions. [2021-06-05 03:52:13,778 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2044 transitions. Word has length 20 [2021-06-05 03:52:13,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:13,778 INFO L482 AbstractCegarLoop]: Abstraction has 699 states and 2044 transitions. [2021-06-05 03:52:13,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:13,778 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2044 transitions. [2021-06-05 03:52:13,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:13,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:13,779 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:13,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 03:52:13,993 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:13,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:13,993 INFO L82 PathProgramCache]: Analyzing trace with hash 2053114831, now seen corresponding path program 110 times [2021-06-05 03:52:13,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:13,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212915482] [2021-06-05 03:52:13,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:14,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:14,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212915482] [2021-06-05 03:52:14,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212915482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:14,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462176312] [2021-06-05 03:52:14,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:14,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:14,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:14,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:14,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:14,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462176312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:14,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:14,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 03:52:14,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975672561] [2021-06-05 03:52:14,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:14,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:14,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:14,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:14,111 INFO L87 Difference]: Start difference. First operand 699 states and 2044 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:14,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:14,401 INFO L93 Difference]: Finished difference Result 1249 states and 3308 transitions. [2021-06-05 03:52:14,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 03:52:14,401 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:14,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:14,403 INFO L225 Difference]: With dead ends: 1249 [2021-06-05 03:52:14,403 INFO L226 Difference]: Without dead ends: 1240 [2021-06-05 03:52:14,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 245.0ms TimeCoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 03:52:14,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-06-05 03:52:14,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 724. [2021-06-05 03:52:14,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.936376210235131) internal successors, (2123), 723 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:14,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 2123 transitions. [2021-06-05 03:52:14,412 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 2123 transitions. Word has length 20 [2021-06-05 03:52:14,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:14,412 INFO L482 AbstractCegarLoop]: Abstraction has 724 states and 2123 transitions. [2021-06-05 03:52:14,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:14,412 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 2123 transitions. [2021-06-05 03:52:14,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:14,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:14,413 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:14,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 03:52:14,614 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:14,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:14,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1465369509, now seen corresponding path program 111 times [2021-06-05 03:52:14,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:14,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560998615] [2021-06-05 03:52:14,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:14,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:14,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:14,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560998615] [2021-06-05 03:52:14,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560998615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:14,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817499273] [2021-06-05 03:52:14,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:14,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:52:14,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:14,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:14,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:14,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817499273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:14,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:14,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 03:52:14,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393633027] [2021-06-05 03:52:14,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:14,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:14,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:14,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:14,737 INFO L87 Difference]: Start difference. First operand 724 states and 2123 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:15,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:15,006 INFO L93 Difference]: Finished difference Result 1262 states and 3371 transitions. [2021-06-05 03:52:15,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 03:52:15,006 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:15,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:15,008 INFO L225 Difference]: With dead ends: 1262 [2021-06-05 03:52:15,008 INFO L226 Difference]: Without dead ends: 1250 [2021-06-05 03:52:15,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 235.7ms TimeCoverageRelationStatistics Valid=374, Invalid=1186, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 03:52:15,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-06-05 03:52:15,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 734. [2021-06-05 03:52:15,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.9263301500682126) internal successors, (2145), 733 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:15,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2145 transitions. [2021-06-05 03:52:15,017 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2145 transitions. Word has length 20 [2021-06-05 03:52:15,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:15,017 INFO L482 AbstractCegarLoop]: Abstraction has 734 states and 2145 transitions. [2021-06-05 03:52:15,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:15,017 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2145 transitions. [2021-06-05 03:52:15,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:15,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:15,018 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:15,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:15,218 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:15,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:15,219 INFO L82 PathProgramCache]: Analyzing trace with hash 425133711, now seen corresponding path program 112 times [2021-06-05 03:52:15,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:15,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579458128] [2021-06-05 03:52:15,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:15,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:15,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:15,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579458128] [2021-06-05 03:52:15,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579458128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:15,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412160374] [2021-06-05 03:52:15,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:15,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:15,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:15,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:15,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:15,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:15,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412160374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:15,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:15,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 03:52:15,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429917043] [2021-06-05 03:52:15,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:15,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:15,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:15,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:15,338 INFO L87 Difference]: Start difference. First operand 734 states and 2145 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:15,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:15,535 INFO L93 Difference]: Finished difference Result 1109 states and 3026 transitions. [2021-06-05 03:52:15,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 03:52:15,538 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:15,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:15,539 INFO L225 Difference]: With dead ends: 1109 [2021-06-05 03:52:15,539 INFO L226 Difference]: Without dead ends: 1097 [2021-06-05 03:52:15,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 03:52:15,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-06-05 03:52:15,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 734. [2021-06-05 03:52:15,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.922237380627558) internal successors, (2142), 733 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:15,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2142 transitions. [2021-06-05 03:52:15,548 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2142 transitions. Word has length 20 [2021-06-05 03:52:15,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:15,548 INFO L482 AbstractCegarLoop]: Abstraction has 734 states and 2142 transitions. [2021-06-05 03:52:15,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:15,548 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2142 transitions. [2021-06-05 03:52:15,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:15,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:15,549 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:15,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-06-05 03:52:15,749 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:15,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:15,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1225555761, now seen corresponding path program 113 times [2021-06-05 03:52:15,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:15,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104078836] [2021-06-05 03:52:15,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:15,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:15,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104078836] [2021-06-05 03:52:15,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104078836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:15,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232616005] [2021-06-05 03:52:15,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:15,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:52:15,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:15,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:15,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:15,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232616005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:15,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:15,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 03:52:15,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925873253] [2021-06-05 03:52:15,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:15,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:15,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:15,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:15,869 INFO L87 Difference]: Start difference. First operand 734 states and 2142 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:16,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:16,171 INFO L93 Difference]: Finished difference Result 1207 states and 3153 transitions. [2021-06-05 03:52:16,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 03:52:16,171 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:16,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:16,172 INFO L225 Difference]: With dead ends: 1207 [2021-06-05 03:52:16,172 INFO L226 Difference]: Without dead ends: 1201 [2021-06-05 03:52:16,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 242.2ms TimeCoverageRelationStatistics Valid=545, Invalid=937, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 03:52:16,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-06-05 03:52:16,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 788. [2021-06-05 03:52:16,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 2.9479034307496823) internal successors, (2320), 787 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:16,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2320 transitions. [2021-06-05 03:52:16,182 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2320 transitions. Word has length 20 [2021-06-05 03:52:16,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:16,182 INFO L482 AbstractCegarLoop]: Abstraction has 788 states and 2320 transitions. [2021-06-05 03:52:16,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:16,182 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2320 transitions. [2021-06-05 03:52:16,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:16,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:16,183 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:16,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:16,384 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:16,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:16,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1690146865, now seen corresponding path program 114 times [2021-06-05 03:52:16,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:16,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422785721] [2021-06-05 03:52:16,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:16,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:16,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422785721] [2021-06-05 03:52:16,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422785721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:16,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128358860] [2021-06-05 03:52:16,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:16,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:52:16,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:16,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:16,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:16,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:16,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128358860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:16,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:16,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 03:52:16,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932955367] [2021-06-05 03:52:16,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:16,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:16,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:16,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:16,504 INFO L87 Difference]: Start difference. First operand 788 states and 2320 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:16,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:16,862 INFO L93 Difference]: Finished difference Result 1081 states and 2841 transitions. [2021-06-05 03:52:16,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 03:52:16,863 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:16,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:16,864 INFO L225 Difference]: With dead ends: 1081 [2021-06-05 03:52:16,864 INFO L226 Difference]: Without dead ends: 1075 [2021-06-05 03:52:16,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 304.8ms TimeCoverageRelationStatistics Valid=782, Invalid=1570, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 03:52:16,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-06-05 03:52:16,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 726. [2021-06-05 03:52:16,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 2.9117241379310346) internal successors, (2111), 725 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:16,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2111 transitions. [2021-06-05 03:52:16,872 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2111 transitions. Word has length 20 [2021-06-05 03:52:16,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:16,873 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 2111 transitions. [2021-06-05 03:52:16,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:16,873 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2111 transitions. [2021-06-05 03:52:16,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:16,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:16,873 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:17,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 03:52:17,077 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:17,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:17,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1723746093, now seen corresponding path program 115 times [2021-06-05 03:52:17,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:17,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29871687] [2021-06-05 03:52:17,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:17,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:17,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:17,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29871687] [2021-06-05 03:52:17,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29871687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:17,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819953192] [2021-06-05 03:52:17,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:17,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:17,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:17,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:17,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819953192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:17,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:17,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 03:52:17,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654887287] [2021-06-05 03:52:17,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:17,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:17,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:17,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:17,218 INFO L87 Difference]: Start difference. First operand 726 states and 2111 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:17,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:17,576 INFO L93 Difference]: Finished difference Result 974 states and 2590 transitions. [2021-06-05 03:52:17,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 03:52:17,577 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:17,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:17,578 INFO L225 Difference]: With dead ends: 974 [2021-06-05 03:52:17,578 INFO L226 Difference]: Without dead ends: 966 [2021-06-05 03:52:17,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 314.2ms TimeCoverageRelationStatistics Valid=776, Invalid=1674, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 03:52:17,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-06-05 03:52:17,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 737. [2021-06-05 03:52:17,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.917119565217391) internal successors, (2147), 736 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:17,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2147 transitions. [2021-06-05 03:52:17,586 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2147 transitions. Word has length 20 [2021-06-05 03:52:17,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:17,586 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 2147 transitions. [2021-06-05 03:52:17,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:17,586 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2147 transitions. [2021-06-05 03:52:17,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:17,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:17,587 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:17,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-06-05 03:52:17,788 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:17,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:17,788 INFO L82 PathProgramCache]: Analyzing trace with hash -623698549, now seen corresponding path program 116 times [2021-06-05 03:52:17,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:17,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581668557] [2021-06-05 03:52:17,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:17,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:17,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:17,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581668557] [2021-06-05 03:52:17,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581668557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:17,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649805754] [2021-06-05 03:52:17,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:17,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:17,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:17,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:17,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:17,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:17,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649805754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:17,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:17,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 03:52:17,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508602695] [2021-06-05 03:52:17,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:17,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:17,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:17,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:17,907 INFO L87 Difference]: Start difference. First operand 737 states and 2147 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:18,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:18,185 INFO L93 Difference]: Finished difference Result 1269 states and 3314 transitions. [2021-06-05 03:52:18,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 03:52:18,185 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:18,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:18,186 INFO L225 Difference]: With dead ends: 1269 [2021-06-05 03:52:18,186 INFO L226 Difference]: Without dead ends: 1260 [2021-06-05 03:52:18,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 227.4ms TimeCoverageRelationStatistics Valid=495, Invalid=837, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 03:52:18,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2021-06-05 03:52:18,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 824. [2021-06-05 03:52:18,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.9404617253948966) internal successors, (2420), 823 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:18,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2420 transitions. [2021-06-05 03:52:18,196 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2420 transitions. Word has length 20 [2021-06-05 03:52:18,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:18,196 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 2420 transitions. [2021-06-05 03:52:18,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:18,197 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2420 transitions. [2021-06-05 03:52:18,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:18,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:18,197 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:18,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:18,398 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:18,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:18,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1088289653, now seen corresponding path program 117 times [2021-06-05 03:52:18,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:18,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495894203] [2021-06-05 03:52:18,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:18,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:18,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495894203] [2021-06-05 03:52:18,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495894203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:18,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547902989] [2021-06-05 03:52:18,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:18,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:52:18,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:18,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:18,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:18,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547902989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:18,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:18,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 03:52:18,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666997375] [2021-06-05 03:52:18,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:18,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:18,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:18,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:18,536 INFO L87 Difference]: Start difference. First operand 824 states and 2420 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:18,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:18,946 INFO L93 Difference]: Finished difference Result 1150 states and 3032 transitions. [2021-06-05 03:52:18,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 03:52:18,946 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:18,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:18,947 INFO L225 Difference]: With dead ends: 1150 [2021-06-05 03:52:18,947 INFO L226 Difference]: Without dead ends: 1144 [2021-06-05 03:52:18,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 365.9ms TimeCoverageRelationStatistics Valid=855, Invalid=1797, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 03:52:18,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-06-05 03:52:18,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 795. [2021-06-05 03:52:18,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 2.9168765743073046) internal successors, (2316), 794 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:18,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2316 transitions. [2021-06-05 03:52:18,957 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2316 transitions. Word has length 20 [2021-06-05 03:52:18,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:18,957 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 2316 transitions. [2021-06-05 03:52:18,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:18,957 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2316 transitions. [2021-06-05 03:52:18,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:18,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:18,958 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:19,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:19,158 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:19,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:19,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1121888881, now seen corresponding path program 118 times [2021-06-05 03:52:19,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:19,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989511439] [2021-06-05 03:52:19,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:19,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:19,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989511439] [2021-06-05 03:52:19,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989511439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:19,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251926283] [2021-06-05 03:52:19,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:52:19,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:19,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:19,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:19,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:19,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251926283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:19,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:19,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 03:52:19,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098158427] [2021-06-05 03:52:19,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:19,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:19,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:19,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:19,345 INFO L87 Difference]: Start difference. First operand 795 states and 2316 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:19,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:19,763 INFO L93 Difference]: Finished difference Result 1155 states and 3056 transitions. [2021-06-05 03:52:19,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 03:52:19,763 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:19,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:19,764 INFO L225 Difference]: With dead ends: 1155 [2021-06-05 03:52:19,764 INFO L226 Difference]: Without dead ends: 1147 [2021-06-05 03:52:19,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 367.3ms TimeCoverageRelationStatistics Valid=776, Invalid=1774, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 03:52:19,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-06-05 03:52:19,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 789. [2021-06-05 03:52:19,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 2.9289340101522843) internal successors, (2308), 788 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:19,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 2308 transitions. [2021-06-05 03:52:19,774 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 2308 transitions. Word has length 20 [2021-06-05 03:52:19,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:19,774 INFO L482 AbstractCegarLoop]: Abstraction has 789 states and 2308 transitions. [2021-06-05 03:52:19,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:19,774 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 2308 transitions. [2021-06-05 03:52:19,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:19,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:19,775 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:19,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 03:52:19,990 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:19,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:19,991 INFO L82 PathProgramCache]: Analyzing trace with hash 2131502347, now seen corresponding path program 119 times [2021-06-05 03:52:19,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:19,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10026596] [2021-06-05 03:52:19,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:20,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:20,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10026596] [2021-06-05 03:52:20,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10026596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:20,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335496747] [2021-06-05 03:52:20,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:20,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:52:20,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:20,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:20,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:20,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335496747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:20,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:20,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 03:52:20,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012027014] [2021-06-05 03:52:20,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:52:20,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:20,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:52:20,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:52:20,226 INFO L87 Difference]: Start difference. First operand 789 states and 2308 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:20,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:20,625 INFO L93 Difference]: Finished difference Result 1081 states and 2905 transitions. [2021-06-05 03:52:20,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 03:52:20,625 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:20,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:20,626 INFO L225 Difference]: With dead ends: 1081 [2021-06-05 03:52:20,626 INFO L226 Difference]: Without dead ends: 1069 [2021-06-05 03:52:20,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 372.8ms TimeCoverageRelationStatistics Valid=746, Invalid=1804, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 03:52:20,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-06-05 03:52:20,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 809. [2021-06-05 03:52:20,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 2.9294554455445545) internal successors, (2367), 808 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:20,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2367 transitions. [2021-06-05 03:52:20,636 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2367 transitions. Word has length 20 [2021-06-05 03:52:20,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:20,636 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 2367 transitions. [2021-06-05 03:52:20,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:20,636 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2367 transitions. [2021-06-05 03:52:20,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:20,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:20,637 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:20,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:20,854 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:20,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:20,854 INFO L82 PathProgramCache]: Analyzing trace with hash 854005839, now seen corresponding path program 120 times [2021-06-05 03:52:20,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:20,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543420468] [2021-06-05 03:52:20,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:20,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:20,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543420468] [2021-06-05 03:52:20,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543420468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:20,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384309399] [2021-06-05 03:52:20,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:20,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:52:20,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:20,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:20,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:21,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:21,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384309399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:21,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:21,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-05 03:52:21,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28988491] [2021-06-05 03:52:21,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:21,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:21,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:21,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:21,020 INFO L87 Difference]: Start difference. First operand 809 states and 2367 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:21,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:21,300 INFO L93 Difference]: Finished difference Result 1520 states and 4046 transitions. [2021-06-05 03:52:21,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 03:52:21,300 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:21,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:21,301 INFO L225 Difference]: With dead ends: 1520 [2021-06-05 03:52:21,301 INFO L226 Difference]: Without dead ends: 1514 [2021-06-05 03:52:21,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 247.5ms TimeCoverageRelationStatistics Valid=491, Invalid=841, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 03:52:21,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2021-06-05 03:52:21,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 989. [2021-06-05 03:52:21,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 2.9898785425101213) internal successors, (2954), 988 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:21,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 2954 transitions. [2021-06-05 03:52:21,313 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 2954 transitions. Word has length 20 [2021-06-05 03:52:21,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:21,313 INFO L482 AbstractCegarLoop]: Abstraction has 989 states and 2954 transitions. [2021-06-05 03:52:21,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:21,313 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 2954 transitions. [2021-06-05 03:52:21,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:21,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:21,314 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:21,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 03:52:21,515 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:21,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:21,515 INFO L82 PathProgramCache]: Analyzing trace with hash 389414735, now seen corresponding path program 121 times [2021-06-05 03:52:21,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:21,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467592034] [2021-06-05 03:52:21,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:21,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:21,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:21,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:21,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467592034] [2021-06-05 03:52:21,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467592034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:21,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220788934] [2021-06-05 03:52:21,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:21,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:21,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:21,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:21,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:21,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220788934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:21,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:21,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-05 03:52:21,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384500116] [2021-06-05 03:52:21,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:21,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:21,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:21,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:21,641 INFO L87 Difference]: Start difference. First operand 989 states and 2954 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:22,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:22,099 INFO L93 Difference]: Finished difference Result 1383 states and 3716 transitions. [2021-06-05 03:52:22,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 03:52:22,101 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:22,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:22,102 INFO L225 Difference]: With dead ends: 1383 [2021-06-05 03:52:22,103 INFO L226 Difference]: Without dead ends: 1379 [2021-06-05 03:52:22,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 400.3ms TimeCoverageRelationStatistics Valid=988, Invalid=2204, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 03:52:22,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2021-06-05 03:52:22,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 956. [2021-06-05 03:52:22,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 2.966492146596859) internal successors, (2833), 955 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:22,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 2833 transitions. [2021-06-05 03:52:22,114 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 2833 transitions. Word has length 20 [2021-06-05 03:52:22,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:22,114 INFO L482 AbstractCegarLoop]: Abstraction has 956 states and 2833 transitions. [2021-06-05 03:52:22,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:22,114 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 2833 transitions. [2021-06-05 03:52:22,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:22,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:22,115 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:22,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 03:52:22,316 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:22,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:22,316 INFO L82 PathProgramCache]: Analyzing trace with hash 355815507, now seen corresponding path program 122 times [2021-06-05 03:52:22,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:22,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167940636] [2021-06-05 03:52:22,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:22,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:22,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:22,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167940636] [2021-06-05 03:52:22,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167940636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:22,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66845430] [2021-06-05 03:52:22,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:22,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:22,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:22,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:22,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:22,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66845430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:22,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:22,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 03:52:22,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201459319] [2021-06-05 03:52:22,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:22,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:22,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:22,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:22,446 INFO L87 Difference]: Start difference. First operand 956 states and 2833 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:22,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:22,844 INFO L93 Difference]: Finished difference Result 1412 states and 3831 transitions. [2021-06-05 03:52:22,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 03:52:22,844 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:22,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:22,846 INFO L225 Difference]: With dead ends: 1412 [2021-06-05 03:52:22,846 INFO L226 Difference]: Without dead ends: 1404 [2021-06-05 03:52:22,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 360.4ms TimeCoverageRelationStatistics Valid=842, Invalid=2020, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 03:52:22,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-06-05 03:52:22,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1024. [2021-06-05 03:52:22,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 2.9980449657869013) internal successors, (3067), 1023 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:22,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 3067 transitions. [2021-06-05 03:52:22,857 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 3067 transitions. Word has length 20 [2021-06-05 03:52:22,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:22,857 INFO L482 AbstractCegarLoop]: Abstraction has 1024 states and 3067 transitions. [2021-06-05 03:52:22,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:22,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 3067 transitions. [2021-06-05 03:52:22,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:22,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:22,859 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:23,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 03:52:23,059 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:23,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:23,059 INFO L82 PathProgramCache]: Analyzing trace with hash -685760561, now seen corresponding path program 123 times [2021-06-05 03:52:23,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:23,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553561609] [2021-06-05 03:52:23,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:23,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:23,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:23,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553561609] [2021-06-05 03:52:23,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553561609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:23,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846003894] [2021-06-05 03:52:23,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:23,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:52:23,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:23,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:23,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:23,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846003894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:23,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:23,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 03:52:23,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606467084] [2021-06-05 03:52:23,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:52:23,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:23,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:52:23,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:52:23,199 INFO L87 Difference]: Start difference. First operand 1024 states and 3067 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:23,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:23,593 INFO L93 Difference]: Finished difference Result 1501 states and 4138 transitions. [2021-06-05 03:52:23,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 03:52:23,593 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:23,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:23,595 INFO L225 Difference]: With dead ends: 1501 [2021-06-05 03:52:23,595 INFO L226 Difference]: Without dead ends: 1489 [2021-06-05 03:52:23,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 343.5ms TimeCoverageRelationStatistics Valid=743, Invalid=1909, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 03:52:23,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2021-06-05 03:52:23,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1112. [2021-06-05 03:52:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.027902790279028) internal successors, (3364), 1111 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:23,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3364 transitions. [2021-06-05 03:52:23,608 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3364 transitions. Word has length 20 [2021-06-05 03:52:23,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:23,609 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 3364 transitions. [2021-06-05 03:52:23,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:23,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3364 transitions. [2021-06-05 03:52:23,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:23,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:23,610 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:23,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:23,810 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:23,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:23,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1385119699, now seen corresponding path program 124 times [2021-06-05 03:52:23,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:23,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589620462] [2021-06-05 03:52:23,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:23,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:23,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589620462] [2021-06-05 03:52:23,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589620462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:23,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674571452] [2021-06-05 03:52:23,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:23,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:23,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:23,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:23,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:23,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:23,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674571452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:23,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:23,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 03:52:23,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150233487] [2021-06-05 03:52:23,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:52:23,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:23,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:52:23,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:52:23,956 INFO L87 Difference]: Start difference. First operand 1112 states and 3364 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:24,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:24,304 INFO L93 Difference]: Finished difference Result 1470 states and 4125 transitions. [2021-06-05 03:52:24,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 03:52:24,304 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:24,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:24,305 INFO L225 Difference]: With dead ends: 1470 [2021-06-05 03:52:24,306 INFO L226 Difference]: Without dead ends: 1454 [2021-06-05 03:52:24,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 326.0ms TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 03:52:24,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-06-05 03:52:24,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1142. [2021-06-05 03:52:24,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.028045574057844) internal successors, (3455), 1141 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:24,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3455 transitions. [2021-06-05 03:52:24,319 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3455 transitions. Word has length 20 [2021-06-05 03:52:24,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:24,319 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 3455 transitions. [2021-06-05 03:52:24,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:24,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3455 transitions. [2021-06-05 03:52:24,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:24,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:24,320 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:24,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-05 03:52:24,527 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:24,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:24,527 INFO L82 PathProgramCache]: Analyzing trace with hash 693043539, now seen corresponding path program 125 times [2021-06-05 03:52:24,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:24,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702510815] [2021-06-05 03:52:24,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:24,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:24,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702510815] [2021-06-05 03:52:24,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702510815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:24,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007992130] [2021-06-05 03:52:24,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:24,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:52:24,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:24,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:24,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:24,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007992130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:24,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:24,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 03:52:24,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994818266] [2021-06-05 03:52:24,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:52:24,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:24,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:52:24,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:52:24,642 INFO L87 Difference]: Start difference. First operand 1142 states and 3455 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:24,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:24,724 INFO L93 Difference]: Finished difference Result 1462 states and 4279 transitions. [2021-06-05 03:52:24,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:52:24,724 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:24,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:24,726 INFO L225 Difference]: With dead ends: 1462 [2021-06-05 03:52:24,726 INFO L226 Difference]: Without dead ends: 1462 [2021-06-05 03:52:24,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:52:24,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-06-05 03:52:24,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1165. [2021-06-05 03:52:24,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 3.0300687285223367) internal successors, (3527), 1164 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:24,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3527 transitions. [2021-06-05 03:52:24,739 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3527 transitions. Word has length 20 [2021-06-05 03:52:24,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:24,739 INFO L482 AbstractCegarLoop]: Abstraction has 1165 states and 3527 transitions. [2021-06-05 03:52:24,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:24,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3527 transitions. [2021-06-05 03:52:24,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:24,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:24,741 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:24,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 03:52:24,957 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:24,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:24,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1067009401, now seen corresponding path program 126 times [2021-06-05 03:52:24,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:24,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418645704] [2021-06-05 03:52:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:24,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:24,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418645704] [2021-06-05 03:52:24,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418645704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:24,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626740329] [2021-06-05 03:52:24,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:25,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:52:25,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:25,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:25,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:25,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626740329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:25,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:25,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 03:52:25,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997466582] [2021-06-05 03:52:25,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:25,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:25,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:25,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:25,081 INFO L87 Difference]: Start difference. First operand 1165 states and 3527 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:25,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:25,266 INFO L93 Difference]: Finished difference Result 1324 states and 3884 transitions. [2021-06-05 03:52:25,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:52:25,266 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:25,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:25,267 INFO L225 Difference]: With dead ends: 1324 [2021-06-05 03:52:25,267 INFO L226 Difference]: Without dead ends: 1324 [2021-06-05 03:52:25,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 167.0ms TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:52:25,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-06-05 03:52:25,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1168. [2021-06-05 03:52:25,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.0299914310197087) internal successors, (3536), 1167 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:25,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3536 transitions. [2021-06-05 03:52:25,279 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3536 transitions. Word has length 20 [2021-06-05 03:52:25,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:25,279 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 3536 transitions. [2021-06-05 03:52:25,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:25,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3536 transitions. [2021-06-05 03:52:25,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:25,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:25,281 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:25,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:25,497 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:25,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:25,498 INFO L82 PathProgramCache]: Analyzing trace with hash -181211121, now seen corresponding path program 127 times [2021-06-05 03:52:25,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:25,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138040555] [2021-06-05 03:52:25,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:25,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:25,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:25,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:25,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138040555] [2021-06-05 03:52:25,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138040555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:25,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313214176] [2021-06-05 03:52:25,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:25,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:25,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:25,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313214176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:25,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:25,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 03:52:25,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622398390] [2021-06-05 03:52:25,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:25,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:25,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:25,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:25,637 INFO L87 Difference]: Start difference. First operand 1168 states and 3536 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:25,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:25,837 INFO L93 Difference]: Finished difference Result 1344 states and 3926 transitions. [2021-06-05 03:52:25,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:52:25,838 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:25,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:25,839 INFO L225 Difference]: With dead ends: 1344 [2021-06-05 03:52:25,839 INFO L226 Difference]: Without dead ends: 1344 [2021-06-05 03:52:25,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 165.3ms TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:52:25,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-06-05 03:52:25,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1174. [2021-06-05 03:52:25,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 3.029838022165388) internal successors, (3554), 1173 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:25,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 3554 transitions. [2021-06-05 03:52:25,851 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 3554 transitions. Word has length 20 [2021-06-05 03:52:25,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:25,851 INFO L482 AbstractCegarLoop]: Abstraction has 1174 states and 3554 transitions. [2021-06-05 03:52:25,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:25,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 3554 transitions. [2021-06-05 03:52:25,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:25,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:25,852 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:26,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:26,053 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:26,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:26,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1925572999, now seen corresponding path program 128 times [2021-06-05 03:52:26,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:26,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829349072] [2021-06-05 03:52:26,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:26,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:26,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:26,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829349072] [2021-06-05 03:52:26,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829349072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:26,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39786875] [2021-06-05 03:52:26,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:26,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:26,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:26,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:26,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:26,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:26,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39786875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:26,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:26,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 03:52:26,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814028686] [2021-06-05 03:52:26,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:26,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:26,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:26,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:26,180 INFO L87 Difference]: Start difference. First operand 1174 states and 3554 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:26,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:26,474 INFO L93 Difference]: Finished difference Result 1444 states and 4134 transitions. [2021-06-05 03:52:26,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 03:52:26,474 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:26,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:26,476 INFO L225 Difference]: With dead ends: 1444 [2021-06-05 03:52:26,476 INFO L226 Difference]: Without dead ends: 1444 [2021-06-05 03:52:26,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 227.7ms TimeCoverageRelationStatistics Valid=459, Invalid=873, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 03:52:26,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-06-05 03:52:26,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1198. [2021-06-05 03:52:26,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.0334168755221387) internal successors, (3631), 1197 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:26,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3631 transitions. [2021-06-05 03:52:26,489 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3631 transitions. Word has length 20 [2021-06-05 03:52:26,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:26,489 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 3631 transitions. [2021-06-05 03:52:26,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:26,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3631 transitions. [2021-06-05 03:52:26,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:26,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:26,490 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:26,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:26,691 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:26,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:26,691 INFO L82 PathProgramCache]: Analyzing trace with hash -223223537, now seen corresponding path program 129 times [2021-06-05 03:52:26,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:26,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190624919] [2021-06-05 03:52:26,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:26,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:26,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190624919] [2021-06-05 03:52:26,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190624919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:26,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69563688] [2021-06-05 03:52:26,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:26,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:52:26,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:26,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:26,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:26,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69563688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:26,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:26,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 03:52:26,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445965044] [2021-06-05 03:52:26,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:26,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:26,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:26,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:26,814 INFO L87 Difference]: Start difference. First operand 1198 states and 3631 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:27,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:27,133 INFO L93 Difference]: Finished difference Result 1560 states and 4362 transitions. [2021-06-05 03:52:27,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 03:52:27,133 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:27,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:27,135 INFO L225 Difference]: With dead ends: 1560 [2021-06-05 03:52:27,135 INFO L226 Difference]: Without dead ends: 1560 [2021-06-05 03:52:27,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 253.7ms TimeCoverageRelationStatistics Valid=597, Invalid=1043, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 03:52:27,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-06-05 03:52:27,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1182. [2021-06-05 03:52:27,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 3.0389500423370026) internal successors, (3589), 1181 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:27,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 3589 transitions. [2021-06-05 03:52:27,148 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 3589 transitions. Word has length 20 [2021-06-05 03:52:27,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:27,148 INFO L482 AbstractCegarLoop]: Abstraction has 1182 states and 3589 transitions. [2021-06-05 03:52:27,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:27,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 3589 transitions. [2021-06-05 03:52:27,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:27,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:27,149 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:27,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 03:52:27,350 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:27,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:27,350 INFO L82 PathProgramCache]: Analyzing trace with hash 348231269, now seen corresponding path program 130 times [2021-06-05 03:52:27,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:27,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886403531] [2021-06-05 03:52:27,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:27,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:27,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:27,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886403531] [2021-06-05 03:52:27,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886403531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:27,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271804352] [2021-06-05 03:52:27,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:27,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:27,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:27,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:27,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:27,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:27,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271804352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:27,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:27,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 03:52:27,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162063848] [2021-06-05 03:52:27,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:27,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:27,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:27,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:27,484 INFO L87 Difference]: Start difference. First operand 1182 states and 3589 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:27,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:27,840 INFO L93 Difference]: Finished difference Result 1402 states and 3999 transitions. [2021-06-05 03:52:27,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 03:52:27,840 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:27,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:27,842 INFO L225 Difference]: With dead ends: 1402 [2021-06-05 03:52:27,842 INFO L226 Difference]: Without dead ends: 1396 [2021-06-05 03:52:27,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 293.1ms TimeCoverageRelationStatistics Valid=781, Invalid=1475, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 03:52:27,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-06-05 03:52:27,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1135. [2021-06-05 03:52:27,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 3.0246913580246915) internal successors, (3430), 1134 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:27,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 3430 transitions. [2021-06-05 03:52:27,859 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 3430 transitions. Word has length 20 [2021-06-05 03:52:27,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:27,859 INFO L482 AbstractCegarLoop]: Abstraction has 1135 states and 3430 transitions. [2021-06-05 03:52:27,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:27,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 3430 transitions. [2021-06-05 03:52:27,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:27,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:27,861 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:28,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 03:52:28,061 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:28,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:28,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1583340277, now seen corresponding path program 131 times [2021-06-05 03:52:28,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:28,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579870171] [2021-06-05 03:52:28,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:28,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:28,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579870171] [2021-06-05 03:52:28,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579870171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:28,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733460762] [2021-06-05 03:52:28,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:28,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:52:28,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:28,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:28,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:28,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:28,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733460762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:28,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:28,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 03:52:28,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101748077] [2021-06-05 03:52:28,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:28,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:28,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:28,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:28,184 INFO L87 Difference]: Start difference. First operand 1135 states and 3430 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:28,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:28,457 INFO L93 Difference]: Finished difference Result 1746 states and 4918 transitions. [2021-06-05 03:52:28,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 03:52:28,457 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:28,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:28,459 INFO L225 Difference]: With dead ends: 1746 [2021-06-05 03:52:28,459 INFO L226 Difference]: Without dead ends: 1737 [2021-06-05 03:52:28,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 222.8ms TimeCoverageRelationStatistics Valid=424, Invalid=836, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 03:52:28,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2021-06-05 03:52:28,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1314. [2021-06-05 03:52:28,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1313 states have (on average 3.0662604722010665) internal successors, (4026), 1313 states have internal predecessors, (4026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:28,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 4026 transitions. [2021-06-05 03:52:28,474 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 4026 transitions. Word has length 20 [2021-06-05 03:52:28,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:28,474 INFO L482 AbstractCegarLoop]: Abstraction has 1314 states and 4026 transitions. [2021-06-05 03:52:28,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:28,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 4026 transitions. [2021-06-05 03:52:28,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:28,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:28,476 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:28,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 03:52:28,689 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:28,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:28,689 INFO L82 PathProgramCache]: Analyzing trace with hash -2047931381, now seen corresponding path program 132 times [2021-06-05 03:52:28,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:28,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726129781] [2021-06-05 03:52:28,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:28,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:28,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:28,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726129781] [2021-06-05 03:52:28,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726129781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:28,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153177045] [2021-06-05 03:52:28,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:28,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:52:28,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:28,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:28,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:28,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:28,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153177045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:28,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:28,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 03:52:28,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219604421] [2021-06-05 03:52:28,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:28,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:28,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:28,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:28,822 INFO L87 Difference]: Start difference. First operand 1314 states and 4026 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:29,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:29,149 INFO L93 Difference]: Finished difference Result 1701 states and 4827 transitions. [2021-06-05 03:52:29,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 03:52:29,150 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:29,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:29,151 INFO L225 Difference]: With dead ends: 1701 [2021-06-05 03:52:29,151 INFO L226 Difference]: Without dead ends: 1697 [2021-06-05 03:52:29,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 274.8ms TimeCoverageRelationStatistics Valid=487, Invalid=1405, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 03:52:29,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2021-06-05 03:52:29,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1246. [2021-06-05 03:52:29,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.031325301204819) internal successors, (3774), 1245 states have internal predecessors, (3774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:29,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 3774 transitions. [2021-06-05 03:52:29,170 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 3774 transitions. Word has length 20 [2021-06-05 03:52:29,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:29,170 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 3774 transitions. [2021-06-05 03:52:29,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:29,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 3774 transitions. [2021-06-05 03:52:29,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:29,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:29,172 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:29,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 03:52:29,372 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:29,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:29,372 INFO L82 PathProgramCache]: Analyzing trace with hash -2081530609, now seen corresponding path program 133 times [2021-06-05 03:52:29,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:29,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18822685] [2021-06-05 03:52:29,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:29,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:29,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:29,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18822685] [2021-06-05 03:52:29,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18822685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:29,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004459685] [2021-06-05 03:52:29,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:29,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:29,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:29,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004459685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:29,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:29,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 03:52:29,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509365230] [2021-06-05 03:52:29,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:29,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:29,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:29,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:29,486 INFO L87 Difference]: Start difference. First operand 1246 states and 3774 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:29,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:29,758 INFO L93 Difference]: Finished difference Result 1682 states and 4760 transitions. [2021-06-05 03:52:29,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 03:52:29,758 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:29,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:29,760 INFO L225 Difference]: With dead ends: 1682 [2021-06-05 03:52:29,760 INFO L226 Difference]: Without dead ends: 1674 [2021-06-05 03:52:29,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 237.1ms TimeCoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 03:52:29,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2021-06-05 03:52:29,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1299. [2021-06-05 03:52:29,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.0338983050847457) internal successors, (3938), 1298 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:29,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3938 transitions. [2021-06-05 03:52:29,773 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3938 transitions. Word has length 20 [2021-06-05 03:52:29,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:29,773 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 3938 transitions. [2021-06-05 03:52:29,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:29,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3938 transitions. [2021-06-05 03:52:29,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:29,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:29,775 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:29,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:29,975 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:29,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:29,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1171860619, now seen corresponding path program 134 times [2021-06-05 03:52:29,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:29,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940587799] [2021-06-05 03:52:29,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:29,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:30,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:30,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:30,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940587799] [2021-06-05 03:52:30,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940587799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:30,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154445470] [2021-06-05 03:52:30,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:30,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:30,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:30,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:30,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:30,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:30,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154445470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:30,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:30,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 03:52:30,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056455506] [2021-06-05 03:52:30,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:30,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:30,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:30,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:30,098 INFO L87 Difference]: Start difference. First operand 1299 states and 3938 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:30,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:30,348 INFO L93 Difference]: Finished difference Result 1724 states and 4914 transitions. [2021-06-05 03:52:30,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 03:52:30,348 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:30,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:30,350 INFO L225 Difference]: With dead ends: 1724 [2021-06-05 03:52:30,350 INFO L226 Difference]: Without dead ends: 1712 [2021-06-05 03:52:30,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 231.0ms TimeCoverageRelationStatistics Valid=374, Invalid=1186, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 03:52:30,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-06-05 03:52:30,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1318. [2021-06-05 03:52:30,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.026575550493546) internal successors, (3986), 1317 states have internal predecessors, (3986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:30,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3986 transitions. [2021-06-05 03:52:30,363 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3986 transitions. Word has length 20 [2021-06-05 03:52:30,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:30,363 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 3986 transitions. [2021-06-05 03:52:30,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:30,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3986 transitions. [2021-06-05 03:52:30,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:30,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:30,365 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:30,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-06-05 03:52:30,568 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:30,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:30,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1052226417, now seen corresponding path program 135 times [2021-06-05 03:52:30,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:30,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823645570] [2021-06-05 03:52:30,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:30,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:30,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823645570] [2021-06-05 03:52:30,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823645570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:30,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950122425] [2021-06-05 03:52:30,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:30,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:52:30,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:30,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:30,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:30,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950122425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:30,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:30,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 03:52:30,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031063785] [2021-06-05 03:52:30,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:30,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:30,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:30,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:30,689 INFO L87 Difference]: Start difference. First operand 1318 states and 3986 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:30,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:30,883 INFO L93 Difference]: Finished difference Result 1567 states and 4524 transitions. [2021-06-05 03:52:30,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 03:52:30,883 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:30,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:30,884 INFO L225 Difference]: With dead ends: 1567 [2021-06-05 03:52:30,885 INFO L226 Difference]: Without dead ends: 1559 [2021-06-05 03:52:30,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 03:52:30,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-06-05 03:52:30,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1318. [2021-06-05 03:52:30,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.023538344722855) internal successors, (3982), 1317 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:30,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3982 transitions. [2021-06-05 03:52:30,898 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3982 transitions. Word has length 20 [2021-06-05 03:52:30,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:30,898 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 3982 transitions. [2021-06-05 03:52:30,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:30,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3982 transitions. [2021-06-05 03:52:30,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:30,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:30,899 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:31,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-05 03:52:31,113 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:31,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:31,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1727648907, now seen corresponding path program 136 times [2021-06-05 03:52:31,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:31,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291967680] [2021-06-05 03:52:31,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:31,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:31,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291967680] [2021-06-05 03:52:31,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291967680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:31,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283883232] [2021-06-05 03:52:31,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:31,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:31,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:31,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:31,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:31,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283883232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:31,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:31,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 03:52:31,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176108511] [2021-06-05 03:52:31,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:52:31,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:31,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:52:31,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:52:31,224 INFO L87 Difference]: Start difference. First operand 1318 states and 3982 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:31,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:31,296 INFO L93 Difference]: Finished difference Result 1464 states and 4346 transitions. [2021-06-05 03:52:31,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:52:31,297 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:31,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:31,298 INFO L225 Difference]: With dead ends: 1464 [2021-06-05 03:52:31,298 INFO L226 Difference]: Without dead ends: 1454 [2021-06-05 03:52:31,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:52:31,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-06-05 03:52:31,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1318. [2021-06-05 03:52:31,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.0227790432801824) internal successors, (3981), 1317 states have internal predecessors, (3981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:31,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3981 transitions. [2021-06-05 03:52:31,311 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3981 transitions. Word has length 20 [2021-06-05 03:52:31,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:31,311 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 3981 transitions. [2021-06-05 03:52:31,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:31,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3981 transitions. [2021-06-05 03:52:31,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:31,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:31,313 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:31,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 03:52:31,513 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:31,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:31,513 INFO L82 PathProgramCache]: Analyzing trace with hash 205924307, now seen corresponding path program 137 times [2021-06-05 03:52:31,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:31,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417171177] [2021-06-05 03:52:31,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:31,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:31,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417171177] [2021-06-05 03:52:31,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417171177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:31,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881308410] [2021-06-05 03:52:31,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:31,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:52:31,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:31,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:31,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:31,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881308410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:31,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:31,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 03:52:31,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405166610] [2021-06-05 03:52:31,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:31,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:31,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:31,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:31,635 INFO L87 Difference]: Start difference. First operand 1318 states and 3981 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:31,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:31,909 INFO L93 Difference]: Finished difference Result 1488 states and 4332 transitions. [2021-06-05 03:52:31,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 03:52:31,909 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:31,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:31,910 INFO L225 Difference]: With dead ends: 1488 [2021-06-05 03:52:31,911 INFO L226 Difference]: Without dead ends: 1488 [2021-06-05 03:52:31,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 234.2ms TimeCoverageRelationStatistics Valid=470, Invalid=1012, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 03:52:31,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2021-06-05 03:52:31,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1320. [2021-06-05 03:52:31,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 3.0227445034116753) internal successors, (3987), 1319 states have internal predecessors, (3987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:31,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 3987 transitions. [2021-06-05 03:52:31,924 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 3987 transitions. Word has length 20 [2021-06-05 03:52:31,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:31,924 INFO L482 AbstractCegarLoop]: Abstraction has 1320 states and 3987 transitions. [2021-06-05 03:52:31,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:31,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 3987 transitions. [2021-06-05 03:52:31,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:31,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:31,925 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:32,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:32,126 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:32,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:32,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1513301805, now seen corresponding path program 138 times [2021-06-05 03:52:32,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:32,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337463847] [2021-06-05 03:52:32,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:32,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:32,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:32,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337463847] [2021-06-05 03:52:32,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337463847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:32,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032561430] [2021-06-05 03:52:32,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:32,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:52:32,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:32,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:32,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:32,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032561430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:32,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:32,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 03:52:32,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671653106] [2021-06-05 03:52:32,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:32,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:32,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:32,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:32,239 INFO L87 Difference]: Start difference. First operand 1320 states and 3987 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:32,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:32,475 INFO L93 Difference]: Finished difference Result 1578 states and 4543 transitions. [2021-06-05 03:52:32,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 03:52:32,475 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:32,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:32,477 INFO L225 Difference]: With dead ends: 1578 [2021-06-05 03:52:32,477 INFO L226 Difference]: Without dead ends: 1572 [2021-06-05 03:52:32,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=359, Invalid=763, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 03:52:32,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-06-05 03:52:32,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1335. [2021-06-05 03:52:32,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 3.02023988005997) internal successors, (4029), 1334 states have internal predecessors, (4029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:32,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 4029 transitions. [2021-06-05 03:52:32,491 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 4029 transitions. Word has length 20 [2021-06-05 03:52:32,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:32,491 INFO L482 AbstractCegarLoop]: Abstraction has 1335 states and 4029 transitions. [2021-06-05 03:52:32,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:32,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 4029 transitions. [2021-06-05 03:52:32,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:32,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:32,492 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:32,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:32,694 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:32,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:32,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1479280595, now seen corresponding path program 139 times [2021-06-05 03:52:32,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:32,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485954350] [2021-06-05 03:52:32,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:32,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:32,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485954350] [2021-06-05 03:52:32,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485954350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:32,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415454991] [2021-06-05 03:52:32,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:32,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:32,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:32,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:32,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:32,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415454991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:32,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:32,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 03:52:32,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910851286] [2021-06-05 03:52:32,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:32,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:32,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:32,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:32,815 INFO L87 Difference]: Start difference. First operand 1335 states and 4029 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:33,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:33,051 INFO L93 Difference]: Finished difference Result 1610 states and 4633 transitions. [2021-06-05 03:52:33,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 03:52:33,051 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:33,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:33,053 INFO L225 Difference]: With dead ends: 1610 [2021-06-05 03:52:33,053 INFO L226 Difference]: Without dead ends: 1606 [2021-06-05 03:52:33,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 207.6ms TimeCoverageRelationStatistics Valid=383, Invalid=739, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 03:52:33,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2021-06-05 03:52:33,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1324. [2021-06-05 03:52:33,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.018896447467876) internal successors, (3994), 1323 states have internal predecessors, (3994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:33,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 3994 transitions. [2021-06-05 03:52:33,067 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 3994 transitions. Word has length 20 [2021-06-05 03:52:33,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:33,067 INFO L482 AbstractCegarLoop]: Abstraction has 1324 states and 3994 transitions. [2021-06-05 03:52:33,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:33,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 3994 transitions. [2021-06-05 03:52:33,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:33,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:33,068 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:33,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable242 [2021-06-05 03:52:33,269 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:33,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:33,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1437268179, now seen corresponding path program 140 times [2021-06-05 03:52:33,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:33,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672429281] [2021-06-05 03:52:33,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:33,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:33,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672429281] [2021-06-05 03:52:33,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672429281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:33,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321232607] [2021-06-05 03:52:33,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:33,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:33,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:33,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:33,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:33,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:33,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321232607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:33,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:33,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 03:52:33,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191357772] [2021-06-05 03:52:33,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:33,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:33,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:33,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:33,390 INFO L87 Difference]: Start difference. First operand 1324 states and 3994 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:33,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:33,684 INFO L93 Difference]: Finished difference Result 1777 states and 4996 transitions. [2021-06-05 03:52:33,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 03:52:33,684 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:33,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:33,686 INFO L225 Difference]: With dead ends: 1777 [2021-06-05 03:52:33,686 INFO L226 Difference]: Without dead ends: 1777 [2021-06-05 03:52:33,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 241.2ms TimeCoverageRelationStatistics Valid=545, Invalid=937, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 03:52:33,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-06-05 03:52:33,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1334. [2021-06-05 03:52:33,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 3.0270067516879218) internal successors, (4035), 1333 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:33,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 4035 transitions. [2021-06-05 03:52:33,701 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 4035 transitions. Word has length 20 [2021-06-05 03:52:33,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:33,701 INFO L482 AbstractCegarLoop]: Abstraction has 1334 states and 4035 transitions. [2021-06-05 03:52:33,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:33,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 4035 transitions. [2021-06-05 03:52:33,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:33,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:33,702 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:33,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 03:52:33,905 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:33,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:33,905 INFO L82 PathProgramCache]: Analyzing trace with hash 2008722985, now seen corresponding path program 141 times [2021-06-05 03:52:33,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:33,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812726139] [2021-06-05 03:52:33,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:33,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:33,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:33,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812726139] [2021-06-05 03:52:33,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812726139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:33,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596247667] [2021-06-05 03:52:33,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:33,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:52:33,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:33,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:33,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:34,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:34,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596247667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:34,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:34,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 03:52:34,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86928379] [2021-06-05 03:52:34,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:34,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:34,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:34,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:34,020 INFO L87 Difference]: Start difference. First operand 1334 states and 4035 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:34,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:34,379 INFO L93 Difference]: Finished difference Result 1692 states and 4755 transitions. [2021-06-05 03:52:34,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 03:52:34,379 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:34,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:34,381 INFO L225 Difference]: With dead ends: 1692 [2021-06-05 03:52:34,381 INFO L226 Difference]: Without dead ends: 1683 [2021-06-05 03:52:34,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 312.0ms TimeCoverageRelationStatistics Valid=782, Invalid=1570, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 03:52:34,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-06-05 03:52:34,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1280. [2021-06-05 03:52:34,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.0101641907740424) internal successors, (3850), 1279 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:34,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 3850 transitions. [2021-06-05 03:52:34,396 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 3850 transitions. Word has length 20 [2021-06-05 03:52:34,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:34,396 INFO L482 AbstractCegarLoop]: Abstraction has 1280 states and 3850 transitions. [2021-06-05 03:52:34,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:34,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 3850 transitions. [2021-06-05 03:52:34,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:34,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:34,398 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:34,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 03:52:34,614 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:34,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:34,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1751014509, now seen corresponding path program 142 times [2021-06-05 03:52:34,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:34,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33540828] [2021-06-05 03:52:34,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:34,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:34,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33540828] [2021-06-05 03:52:34,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33540828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:34,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662225306] [2021-06-05 03:52:34,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:34,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:34,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:34,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:34,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:34,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662225306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:34,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:34,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 03:52:34,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480716689] [2021-06-05 03:52:34,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:34,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:34,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:34,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:34,742 INFO L87 Difference]: Start difference. First operand 1280 states and 3850 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:35,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:35,086 INFO L93 Difference]: Finished difference Result 1586 states and 4510 transitions. [2021-06-05 03:52:35,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 03:52:35,086 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:35,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:35,087 INFO L225 Difference]: With dead ends: 1586 [2021-06-05 03:52:35,087 INFO L226 Difference]: Without dead ends: 1574 [2021-06-05 03:52:35,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 299.3ms TimeCoverageRelationStatistics Valid=776, Invalid=1674, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 03:52:35,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2021-06-05 03:52:35,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1291. [2021-06-05 03:52:35,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 1290 states have (on average 3.011627906976744) internal successors, (3885), 1290 states have internal predecessors, (3885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:35,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 3885 transitions. [2021-06-05 03:52:35,102 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 3885 transitions. Word has length 20 [2021-06-05 03:52:35,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:35,102 INFO L482 AbstractCegarLoop]: Abstraction has 1291 states and 3885 transitions. [2021-06-05 03:52:35,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:35,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 3885 transitions. [2021-06-05 03:52:35,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:35,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:35,103 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:35,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 03:52:35,317 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:35,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:35,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1012163591, now seen corresponding path program 143 times [2021-06-05 03:52:35,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:35,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357733709] [2021-06-05 03:52:35,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:35,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:35,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357733709] [2021-06-05 03:52:35,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357733709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:35,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760515965] [2021-06-05 03:52:35,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:35,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:52:35,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:35,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:35,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:35,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760515965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:35,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:35,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 03:52:35,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137217380] [2021-06-05 03:52:35,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:52:35,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:35,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:52:35,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:52:35,460 INFO L87 Difference]: Start difference. First operand 1291 states and 3885 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:35,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:35,775 INFO L93 Difference]: Finished difference Result 1481 states and 4275 transitions. [2021-06-05 03:52:35,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 03:52:35,776 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:35,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:35,777 INFO L225 Difference]: With dead ends: 1481 [2021-06-05 03:52:35,778 INFO L226 Difference]: Without dead ends: 1481 [2021-06-05 03:52:35,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 279.8ms TimeCoverageRelationStatistics Valid=544, Invalid=1262, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 03:52:35,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-06-05 03:52:35,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1282. [2021-06-05 03:52:35,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.0101483216237312) internal successors, (3856), 1281 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:35,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 3856 transitions. [2021-06-05 03:52:35,790 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 3856 transitions. Word has length 20 [2021-06-05 03:52:35,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:35,791 INFO L482 AbstractCegarLoop]: Abstraction has 1282 states and 3856 transitions. [2021-06-05 03:52:35,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:35,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 3856 transitions. [2021-06-05 03:52:35,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:35,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:35,792 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:35,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 03:52:35,993 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:35,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:35,993 INFO L82 PathProgramCache]: Analyzing trace with hash 141559951, now seen corresponding path program 144 times [2021-06-05 03:52:35,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:35,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674025046] [2021-06-05 03:52:35,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:36,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:36,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:36,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674025046] [2021-06-05 03:52:36,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674025046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:36,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987994957] [2021-06-05 03:52:36,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:36,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:52:36,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:36,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:36,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:36,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:36,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987994957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:36,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:36,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 03:52:36,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961687271] [2021-06-05 03:52:36,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:36,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:36,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:36,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:36,132 INFO L87 Difference]: Start difference. First operand 1282 states and 3856 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:36,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:36,423 INFO L93 Difference]: Finished difference Result 1620 states and 4620 transitions. [2021-06-05 03:52:36,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 03:52:36,423 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:36,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:36,425 INFO L225 Difference]: With dead ends: 1620 [2021-06-05 03:52:36,425 INFO L226 Difference]: Without dead ends: 1614 [2021-06-05 03:52:36,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 262.6ms TimeCoverageRelationStatistics Valid=436, Invalid=970, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 03:52:36,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-06-05 03:52:36,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1305. [2021-06-05 03:52:36,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 1304 states have (on average 3.013803680981595) internal successors, (3930), 1304 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:36,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 3930 transitions. [2021-06-05 03:52:36,439 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 3930 transitions. Word has length 20 [2021-06-05 03:52:36,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:36,440 INFO L482 AbstractCegarLoop]: Abstraction has 1305 states and 3930 transitions. [2021-06-05 03:52:36,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:36,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 3930 transitions. [2021-06-05 03:52:36,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:36,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:36,441 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:36,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:36,641 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:36,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:36,642 INFO L82 PathProgramCache]: Analyzing trace with hash 529117959, now seen corresponding path program 145 times [2021-06-05 03:52:36,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:36,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603852054] [2021-06-05 03:52:36,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:36,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:36,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603852054] [2021-06-05 03:52:36,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603852054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:36,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623311016] [2021-06-05 03:52:36,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:36,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:36,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:36,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623311016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:36,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:36,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 03:52:36,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233826677] [2021-06-05 03:52:36,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:36,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:36,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:36,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:36,766 INFO L87 Difference]: Start difference. First operand 1305 states and 3930 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:37,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:37,033 INFO L93 Difference]: Finished difference Result 1830 states and 5202 transitions. [2021-06-05 03:52:37,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 03:52:37,034 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:37,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:37,036 INFO L225 Difference]: With dead ends: 1830 [2021-06-05 03:52:37,036 INFO L226 Difference]: Without dead ends: 1828 [2021-06-05 03:52:37,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 227.3ms TimeCoverageRelationStatistics Valid=408, Invalid=782, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 03:52:37,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-06-05 03:52:37,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1345. [2021-06-05 03:52:37,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 3.013392857142857) internal successors, (4050), 1344 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:37,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4050 transitions. [2021-06-05 03:52:37,052 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4050 transitions. Word has length 20 [2021-06-05 03:52:37,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:37,052 INFO L482 AbstractCegarLoop]: Abstraction has 1345 states and 4050 transitions. [2021-06-05 03:52:37,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:37,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4050 transitions. [2021-06-05 03:52:37,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:37,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:37,054 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:37,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 03:52:37,254 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:37,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:37,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1372903823, now seen corresponding path program 146 times [2021-06-05 03:52:37,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:37,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610361828] [2021-06-05 03:52:37,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:37,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:37,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:37,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610361828] [2021-06-05 03:52:37,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610361828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:37,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400937214] [2021-06-05 03:52:37,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:37,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:37,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:37,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:37,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:37,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400937214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:37,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:37,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 03:52:37,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574548455] [2021-06-05 03:52:37,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:37,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:37,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:37,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:37,423 INFO L87 Difference]: Start difference. First operand 1345 states and 4050 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:37,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:37,717 INFO L93 Difference]: Finished difference Result 1888 states and 5315 transitions. [2021-06-05 03:52:37,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 03:52:37,718 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:37,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:37,719 INFO L225 Difference]: With dead ends: 1888 [2021-06-05 03:52:37,719 INFO L226 Difference]: Without dead ends: 1888 [2021-06-05 03:52:37,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 230.5ms TimeCoverageRelationStatistics Valid=495, Invalid=837, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 03:52:37,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-06-05 03:52:37,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1399. [2021-06-05 03:52:37,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 3.0257510729613735) internal successors, (4230), 1398 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:37,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 4230 transitions. [2021-06-05 03:52:37,735 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 4230 transitions. Word has length 20 [2021-06-05 03:52:37,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:37,735 INFO L482 AbstractCegarLoop]: Abstraction has 1399 states and 4230 transitions. [2021-06-05 03:52:37,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:37,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 4230 transitions. [2021-06-05 03:52:37,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:37,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:37,736 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:37,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 03:52:37,937 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:37,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:37,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1944358629, now seen corresponding path program 147 times [2021-06-05 03:52:37,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:37,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924615240] [2021-06-05 03:52:37,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:37,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:37,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924615240] [2021-06-05 03:52:37,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924615240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:37,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821718648] [2021-06-05 03:52:37,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:37,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:52:37,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:37,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:37,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:38,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821718648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:38,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:38,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 03:52:38,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931797419] [2021-06-05 03:52:38,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:38,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:38,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:38,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:38,062 INFO L87 Difference]: Start difference. First operand 1399 states and 4230 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:38,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:38,480 INFO L93 Difference]: Finished difference Result 1840 states and 5179 transitions. [2021-06-05 03:52:38,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 03:52:38,481 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:38,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:38,482 INFO L225 Difference]: With dead ends: 1840 [2021-06-05 03:52:38,482 INFO L226 Difference]: Without dead ends: 1831 [2021-06-05 03:52:38,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 339.7ms TimeCoverageRelationStatistics Valid=855, Invalid=1797, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 03:52:38,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-06-05 03:52:38,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1368. [2021-06-05 03:52:38,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1367 states have (on average 3.015362106803219) internal successors, (4122), 1367 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:38,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 4122 transitions. [2021-06-05 03:52:38,499 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 4122 transitions. Word has length 20 [2021-06-05 03:52:38,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:38,499 INFO L482 AbstractCegarLoop]: Abstraction has 1368 states and 4122 transitions. [2021-06-05 03:52:38,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:38,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 4122 transitions. [2021-06-05 03:52:38,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:38,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:38,500 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:38,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:38,716 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:38,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:38,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1815378865, now seen corresponding path program 148 times [2021-06-05 03:52:38,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:38,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692921145] [2021-06-05 03:52:38,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:38,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:38,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692921145] [2021-06-05 03:52:38,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692921145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:38,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905848307] [2021-06-05 03:52:38,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:38,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:38,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:38,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:38,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:38,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:38,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905848307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:38,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:38,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 03:52:38,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641681957] [2021-06-05 03:52:38,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:38,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:38,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:38,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:38,840 INFO L87 Difference]: Start difference. First operand 1368 states and 4122 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:39,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:39,208 INFO L93 Difference]: Finished difference Result 1834 states and 5156 transitions. [2021-06-05 03:52:39,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 03:52:39,208 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:39,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:39,210 INFO L225 Difference]: With dead ends: 1834 [2021-06-05 03:52:39,210 INFO L226 Difference]: Without dead ends: 1822 [2021-06-05 03:52:39,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 329.3ms TimeCoverageRelationStatistics Valid=776, Invalid=1774, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 03:52:39,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2021-06-05 03:52:39,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1349. [2021-06-05 03:52:39,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.015578635014837) internal successors, (4065), 1348 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:39,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4065 transitions. [2021-06-05 03:52:39,227 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4065 transitions. Word has length 20 [2021-06-05 03:52:39,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:39,227 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 4065 transitions. [2021-06-05 03:52:39,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:39,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4065 transitions. [2021-06-05 03:52:39,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:39,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:39,228 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:39,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:39,443 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:39,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:39,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1891843109, now seen corresponding path program 149 times [2021-06-05 03:52:39,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:39,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040371366] [2021-06-05 03:52:39,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:39,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:39,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:39,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040371366] [2021-06-05 03:52:39,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040371366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:39,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254395558] [2021-06-05 03:52:39,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:39,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:52:39,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:39,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:39,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:39,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254395558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:39,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:39,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 03:52:39,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444509533] [2021-06-05 03:52:39,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:52:39,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:39,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:52:39,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:52:39,572 INFO L87 Difference]: Start difference. First operand 1349 states and 4065 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:39,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:39,914 INFO L93 Difference]: Finished difference Result 1747 states and 4974 transitions. [2021-06-05 03:52:39,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 03:52:39,915 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:39,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:39,917 INFO L225 Difference]: With dead ends: 1747 [2021-06-05 03:52:39,917 INFO L226 Difference]: Without dead ends: 1729 [2021-06-05 03:52:39,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 308.4ms TimeCoverageRelationStatistics Valid=746, Invalid=1804, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 03:52:39,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-06-05 03:52:39,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1363. [2021-06-05 03:52:39,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 3.0198237885462555) internal successors, (4113), 1362 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:39,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 4113 transitions. [2021-06-05 03:52:39,932 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 4113 transitions. Word has length 20 [2021-06-05 03:52:39,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:39,932 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 4113 transitions. [2021-06-05 03:52:39,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:39,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 4113 transitions. [2021-06-05 03:52:39,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:39,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:39,933 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:40,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:40,133 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:40,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:40,134 INFO L82 PathProgramCache]: Analyzing trace with hash 235777619, now seen corresponding path program 150 times [2021-06-05 03:52:40,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:40,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558690363] [2021-06-05 03:52:40,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:40,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:40,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558690363] [2021-06-05 03:52:40,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558690363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:40,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948040400] [2021-06-05 03:52:40,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:40,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:52:40,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:40,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:40,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:40,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948040400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:40,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:40,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 03:52:40,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536300122] [2021-06-05 03:52:40,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:52:40,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:40,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:52:40,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:52:40,307 INFO L87 Difference]: Start difference. First operand 1363 states and 4113 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:40,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:40,642 INFO L93 Difference]: Finished difference Result 1698 states and 4871 transitions. [2021-06-05 03:52:40,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 03:52:40,642 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:40,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:40,644 INFO L225 Difference]: With dead ends: 1698 [2021-06-05 03:52:40,644 INFO L226 Difference]: Without dead ends: 1698 [2021-06-05 03:52:40,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 304.0ms TimeCoverageRelationStatistics Valid=603, Invalid=1467, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 03:52:40,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-06-05 03:52:40,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1400. [2021-06-05 03:52:40,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 3.013581129378127) internal successors, (4216), 1399 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:40,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 4216 transitions. [2021-06-05 03:52:40,659 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 4216 transitions. Word has length 20 [2021-06-05 03:52:40,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:40,659 INFO L482 AbstractCegarLoop]: Abstraction has 1400 states and 4216 transitions. [2021-06-05 03:52:40,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:40,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 4216 transitions. [2021-06-05 03:52:40,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:40,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:40,661 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:40,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:40,861 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:40,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:40,861 INFO L82 PathProgramCache]: Analyzing trace with hash -97333165, now seen corresponding path program 151 times [2021-06-05 03:52:40,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:40,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334991736] [2021-06-05 03:52:40,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:40,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:40,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334991736] [2021-06-05 03:52:40,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334991736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:40,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532864109] [2021-06-05 03:52:40,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:40,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:40,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:40,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532864109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:40,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:40,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 03:52:40,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529659384] [2021-06-05 03:52:40,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:52:40,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:40,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:52:40,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:52:40,995 INFO L87 Difference]: Start difference. First operand 1400 states and 4216 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:41,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:41,295 INFO L93 Difference]: Finished difference Result 1946 states and 5516 transitions. [2021-06-05 03:52:41,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 03:52:41,296 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:41,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:41,298 INFO L225 Difference]: With dead ends: 1946 [2021-06-05 03:52:41,298 INFO L226 Difference]: Without dead ends: 1946 [2021-06-05 03:52:41,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 256.8ms TimeCoverageRelationStatistics Valid=468, Invalid=1092, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 03:52:41,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2021-06-05 03:52:41,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1486. [2021-06-05 03:52:41,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.0202020202020203) internal successors, (4485), 1485 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:41,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 4485 transitions. [2021-06-05 03:52:41,315 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 4485 transitions. Word has length 20 [2021-06-05 03:52:41,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:41,315 INFO L482 AbstractCegarLoop]: Abstraction has 1486 states and 4485 transitions. [2021-06-05 03:52:41,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:41,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 4485 transitions. [2021-06-05 03:52:41,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:41,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:41,317 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:41,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-06-05 03:52:41,517 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:41,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:41,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1138847315, now seen corresponding path program 152 times [2021-06-05 03:52:41,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:41,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117915773] [2021-06-05 03:52:41,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:41,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:41,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117915773] [2021-06-05 03:52:41,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117915773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:41,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867927520] [2021-06-05 03:52:41,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:41,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:41,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:41,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:41,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:41,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:41,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867927520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:41,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:41,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 03:52:41,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582658217] [2021-06-05 03:52:41,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:41,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:41,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:41,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:41,684 INFO L87 Difference]: Start difference. First operand 1486 states and 4485 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:42,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:42,006 INFO L93 Difference]: Finished difference Result 2146 states and 6136 transitions. [2021-06-05 03:52:42,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 03:52:42,006 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:42,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:42,009 INFO L225 Difference]: With dead ends: 2146 [2021-06-05 03:52:42,009 INFO L226 Difference]: Without dead ends: 2146 [2021-06-05 03:52:42,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 263.2ms TimeCoverageRelationStatistics Valid=438, Invalid=894, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 03:52:42,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2021-06-05 03:52:42,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 1603. [2021-06-05 03:52:42,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 3.034956304619226) internal successors, (4862), 1602 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:42,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 4862 transitions. [2021-06-05 03:52:42,028 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 4862 transitions. Word has length 20 [2021-06-05 03:52:42,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:42,028 INFO L482 AbstractCegarLoop]: Abstraction has 1603 states and 4862 transitions. [2021-06-05 03:52:42,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:42,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 4862 transitions. [2021-06-05 03:52:42,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:42,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:42,030 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:42,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:42,231 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:42,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:42,232 INFO L82 PathProgramCache]: Analyzing trace with hash -622391213, now seen corresponding path program 153 times [2021-06-05 03:52:42,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:42,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635361427] [2021-06-05 03:52:42,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:42,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:42,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:42,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:42,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635361427] [2021-06-05 03:52:42,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635361427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:42,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710362065] [2021-06-05 03:52:42,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:42,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:52:42,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:42,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:42,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:42,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710362065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:42,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:42,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-05 03:52:42,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635566801] [2021-06-05 03:52:42,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:42,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:42,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:42,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:42,369 INFO L87 Difference]: Start difference. First operand 1603 states and 4862 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:42,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:42,689 INFO L93 Difference]: Finished difference Result 2514 states and 7203 transitions. [2021-06-05 03:52:42,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 03:52:42,690 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:42,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:42,692 INFO L225 Difference]: With dead ends: 2514 [2021-06-05 03:52:42,692 INFO L226 Difference]: Without dead ends: 2514 [2021-06-05 03:52:42,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 267.8ms TimeCoverageRelationStatistics Valid=491, Invalid=841, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 03:52:42,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-05 03:52:42,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 1911. [2021-06-05 03:52:42,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 3.0701570680628274) internal successors, (5864), 1910 states have internal predecessors, (5864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:42,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 5864 transitions. [2021-06-05 03:52:42,734 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 5864 transitions. Word has length 20 [2021-06-05 03:52:42,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:42,734 INFO L482 AbstractCegarLoop]: Abstraction has 1911 states and 5864 transitions. [2021-06-05 03:52:42,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:42,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 5864 transitions. [2021-06-05 03:52:42,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:42,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:42,736 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:42,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 03:52:42,949 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:42,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:42,949 INFO L82 PathProgramCache]: Analyzing trace with hash -50936407, now seen corresponding path program 154 times [2021-06-05 03:52:42,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:42,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407475699] [2021-06-05 03:52:42,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:42,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:42,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:42,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407475699] [2021-06-05 03:52:42,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407475699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:42,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606131528] [2021-06-05 03:52:42,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:42,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:42,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:42,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:42,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:43,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606131528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:43,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:43,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-05 03:52:43,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604490921] [2021-06-05 03:52:43,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:43,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:43,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:43,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:43,078 INFO L87 Difference]: Start difference. First operand 1911 states and 5864 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:43,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:43,600 INFO L93 Difference]: Finished difference Result 2413 states and 6919 transitions. [2021-06-05 03:52:43,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 03:52:43,601 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:43,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:43,603 INFO L225 Difference]: With dead ends: 2413 [2021-06-05 03:52:43,603 INFO L226 Difference]: Without dead ends: 2407 [2021-06-05 03:52:43,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 443.9ms TimeCoverageRelationStatistics Valid=988, Invalid=2204, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 03:52:43,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2021-06-05 03:52:43,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 1890. [2021-06-05 03:52:43,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.062466913710958) internal successors, (5785), 1889 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:43,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 5785 transitions. [2021-06-05 03:52:43,625 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 5785 transitions. Word has length 20 [2021-06-05 03:52:43,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:43,625 INFO L482 AbstractCegarLoop]: Abstraction has 1890 states and 5785 transitions. [2021-06-05 03:52:43,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:43,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 5785 transitions. [2021-06-05 03:52:43,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:43,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:43,627 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:43,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 03:52:43,841 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:43,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:43,841 INFO L82 PathProgramCache]: Analyzing trace with hash 484293395, now seen corresponding path program 155 times [2021-06-05 03:52:43,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:43,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140684552] [2021-06-05 03:52:43,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:43,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:43,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:43,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140684552] [2021-06-05 03:52:43,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140684552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:43,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709554010] [2021-06-05 03:52:43,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:43,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:52:43,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:43,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:43,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:43,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:43,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709554010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:43,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:43,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 03:52:43,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350906737] [2021-06-05 03:52:43,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:43,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:43,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:43,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:43,989 INFO L87 Difference]: Start difference. First operand 1890 states and 5785 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:44,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:44,417 INFO L93 Difference]: Finished difference Result 2435 states and 6986 transitions. [2021-06-05 03:52:44,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 03:52:44,417 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:44,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:44,419 INFO L225 Difference]: With dead ends: 2435 [2021-06-05 03:52:44,419 INFO L226 Difference]: Without dead ends: 2423 [2021-06-05 03:52:44,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 386.6ms TimeCoverageRelationStatistics Valid=842, Invalid=2020, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 03:52:44,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-06-05 03:52:44,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 1924. [2021-06-05 03:52:44,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 3.068642745709828) internal successors, (5901), 1923 states have internal predecessors, (5901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:44,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5901 transitions. [2021-06-05 03:52:44,443 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5901 transitions. Word has length 20 [2021-06-05 03:52:44,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:44,443 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 5901 transitions. [2021-06-05 03:52:44,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:44,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5901 transitions. [2021-06-05 03:52:44,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:44,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:44,445 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:44,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-06-05 03:52:44,646 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:44,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:44,646 INFO L82 PathProgramCache]: Analyzing trace with hash -103451927, now seen corresponding path program 156 times [2021-06-05 03:52:44,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:44,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147826955] [2021-06-05 03:52:44,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:44,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:44,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147826955] [2021-06-05 03:52:44,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147826955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:44,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502434141] [2021-06-05 03:52:44,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:44,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:52:44,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:44,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:44,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:44,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502434141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:44,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:44,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 03:52:44,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766417351] [2021-06-05 03:52:44,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:52:44,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:44,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:52:44,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:52:44,779 INFO L87 Difference]: Start difference. First operand 1924 states and 5901 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:45,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:45,160 INFO L93 Difference]: Finished difference Result 2515 states and 7235 transitions. [2021-06-05 03:52:45,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 03:52:45,161 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:45,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:45,163 INFO L225 Difference]: With dead ends: 2515 [2021-06-05 03:52:45,163 INFO L226 Difference]: Without dead ends: 2497 [2021-06-05 03:52:45,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 347.8ms TimeCoverageRelationStatistics Valid=743, Invalid=1909, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 03:52:45,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-06-05 03:52:45,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1989. [2021-06-05 03:52:45,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1989 states, 1988 states have (on average 3.0759557344064388) internal successors, (6115), 1988 states have internal predecessors, (6115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:45,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 6115 transitions. [2021-06-05 03:52:45,185 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 6115 transitions. Word has length 20 [2021-06-05 03:52:45,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:45,185 INFO L482 AbstractCegarLoop]: Abstraction has 1989 states and 6115 transitions. [2021-06-05 03:52:45,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:45,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 6115 transitions. [2021-06-05 03:52:45,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:52:45,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:45,187 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:45,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:45,387 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:45,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:45,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1143687725, now seen corresponding path program 157 times [2021-06-05 03:52:45,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:45,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667949456] [2021-06-05 03:52:45,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:45,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:45,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667949456] [2021-06-05 03:52:45,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667949456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:45,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849619776] [2021-06-05 03:52:45,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:45,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:45,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:52:45,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:45,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:45,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849619776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:45,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:45,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 03:52:45,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143567694] [2021-06-05 03:52:45,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:52:45,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:45,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:52:45,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:52:45,591 INFO L87 Difference]: Start difference. First operand 1989 states and 6115 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:45,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:45,947 INFO L93 Difference]: Finished difference Result 2460 states and 7169 transitions. [2021-06-05 03:52:45,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 03:52:45,947 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:52:45,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:45,950 INFO L225 Difference]: With dead ends: 2460 [2021-06-05 03:52:45,950 INFO L226 Difference]: Without dead ends: 2436 [2021-06-05 03:52:45,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 321.8ms TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 03:52:45,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-06-05 03:52:45,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 2023. [2021-06-05 03:52:45,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 3.073689416419387) internal successors, (6215), 2022 states have internal predecessors, (6215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:45,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 6215 transitions. [2021-06-05 03:52:45,973 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 6215 transitions. Word has length 20 [2021-06-05 03:52:45,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:45,973 INFO L482 AbstractCegarLoop]: Abstraction has 2023 states and 6215 transitions. [2021-06-05 03:52:45,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:45,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 6215 transitions. [2021-06-05 03:52:45,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:52:45,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:45,975 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:46,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-06-05 03:52:46,175 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:46,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:46,176 INFO L82 PathProgramCache]: Analyzing trace with hash -950598133, now seen corresponding path program 158 times [2021-06-05 03:52:46,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:46,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808420781] [2021-06-05 03:52:46,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:46,321 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:46,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:46,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808420781] [2021-06-05 03:52:46,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808420781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:46,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720552706] [2021-06-05 03:52:46,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:46,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:46,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:46,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:52:46,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:46,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720552706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:46,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:46,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 03:52:46,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256954228] [2021-06-05 03:52:46,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:46,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:46,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:46,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:46,472 INFO L87 Difference]: Start difference. First operand 2023 states and 6215 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:46,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:46,814 INFO L93 Difference]: Finished difference Result 2290 states and 6704 transitions. [2021-06-05 03:52:46,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:52:46,814 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:52:46,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:46,817 INFO L225 Difference]: With dead ends: 2290 [2021-06-05 03:52:46,818 INFO L226 Difference]: Without dead ends: 2264 [2021-06-05 03:52:46,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 273.3ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:52:46,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-06-05 03:52:46,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2067. [2021-06-05 03:52:46,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 3.054211035818006) internal successors, (6310), 2066 states have internal predecessors, (6310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:46,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 6310 transitions. [2021-06-05 03:52:46,843 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 6310 transitions. Word has length 21 [2021-06-05 03:52:46,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:46,848 INFO L482 AbstractCegarLoop]: Abstraction has 2067 states and 6310 transitions. [2021-06-05 03:52:46,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:46,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 6310 transitions. [2021-06-05 03:52:46,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:52:46,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:46,851 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:47,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:47,052 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:47,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:47,052 INFO L82 PathProgramCache]: Analyzing trace with hash 2035301631, now seen corresponding path program 159 times [2021-06-05 03:52:47,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:47,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367792421] [2021-06-05 03:52:47,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:47,141 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:47,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:47,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367792421] [2021-06-05 03:52:47,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367792421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:47,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871397944] [2021-06-05 03:52:47,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:47,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:52:47,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:47,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:52:47,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:47,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871397944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:47,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:47,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 03:52:47,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672969554] [2021-06-05 03:52:47,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:47,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:47,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:47,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:47,263 INFO L87 Difference]: Start difference. First operand 2067 states and 6310 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:47,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:47,435 INFO L93 Difference]: Finished difference Result 2347 states and 6861 transitions. [2021-06-05 03:52:47,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:52:47,436 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:52:47,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:47,439 INFO L225 Difference]: With dead ends: 2347 [2021-06-05 03:52:47,439 INFO L226 Difference]: Without dead ends: 2340 [2021-06-05 03:52:47,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 177.4ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:52:47,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2340 states. [2021-06-05 03:52:47,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2340 to 2120. [2021-06-05 03:52:47,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.06465313827277) internal successors, (6494), 2119 states have internal predecessors, (6494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:47,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 6494 transitions. [2021-06-05 03:52:47,475 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 6494 transitions. Word has length 21 [2021-06-05 03:52:47,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:47,475 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 6494 transitions. [2021-06-05 03:52:47,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:47,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 6494 transitions. [2021-06-05 03:52:47,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:52:47,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:47,477 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:47,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:47,678 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:47,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:47,678 INFO L82 PathProgramCache]: Analyzing trace with hash -644962941, now seen corresponding path program 160 times [2021-06-05 03:52:47,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:47,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970884047] [2021-06-05 03:52:47,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:47,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:47,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970884047] [2021-06-05 03:52:47,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970884047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:47,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020876492] [2021-06-05 03:52:47,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:47,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:47,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:47,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:52:47,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:47,917 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:47,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020876492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:47,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:47,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 03:52:47,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602544256] [2021-06-05 03:52:47,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:47,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:47,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:47,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:47,918 INFO L87 Difference]: Start difference. First operand 2120 states and 6494 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:48,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:48,142 INFO L93 Difference]: Finished difference Result 2333 states and 6841 transitions. [2021-06-05 03:52:48,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:52:48,142 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:52:48,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:48,145 INFO L225 Difference]: With dead ends: 2333 [2021-06-05 03:52:48,145 INFO L226 Difference]: Without dead ends: 2317 [2021-06-05 03:52:48,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:52:48,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-06-05 03:52:48,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2083. [2021-06-05 03:52:48,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:48,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2021-06-05 03:52:48,168 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2021-06-05 03:52:48,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:48,168 INFO L482 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2021-06-05 03:52:48,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:48,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2021-06-05 03:52:48,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:52:48,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:48,170 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:48,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-05 03:52:48,370 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:48,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:48,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1688210859, now seen corresponding path program 161 times [2021-06-05 03:52:48,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:48,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535174430] [2021-06-05 03:52:48,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:48,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:48,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535174430] [2021-06-05 03:52:48,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535174430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:48,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243319370] [2021-06-05 03:52:48,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:48,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:52:48,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:48,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:52:48,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:48,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243319370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:48,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:48,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 03:52:48,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655888548] [2021-06-05 03:52:48,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:48,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:48,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:48,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:48,679 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:48,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:48,921 INFO L93 Difference]: Finished difference Result 2307 states and 6745 transitions. [2021-06-05 03:52:48,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:52:48,922 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:52:48,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:48,925 INFO L225 Difference]: With dead ends: 2307 [2021-06-05 03:52:48,925 INFO L226 Difference]: Without dead ends: 2300 [2021-06-05 03:52:48,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:52:48,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2021-06-05 03:52:48,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 2083. [2021-06-05 03:52:48,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:48,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2021-06-05 03:52:48,947 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2021-06-05 03:52:48,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:48,948 INFO L482 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2021-06-05 03:52:48,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:48,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2021-06-05 03:52:48,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:52:48,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:48,950 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:49,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:49,150 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:49,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:49,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1152981057, now seen corresponding path program 162 times [2021-06-05 03:52:49,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:49,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709973762] [2021-06-05 03:52:49,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:49,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:49,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709973762] [2021-06-05 03:52:49,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709973762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:49,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653309031] [2021-06-05 03:52:49,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:49,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:52:49,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:49,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:52:49,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:49,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653309031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:49,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:49,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 03:52:49,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234745809] [2021-06-05 03:52:49,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:49,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:49,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:49,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:49,380 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:49,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:49,608 INFO L93 Difference]: Finished difference Result 2324 states and 6770 transitions. [2021-06-05 03:52:49,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:52:49,608 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:52:49,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:49,611 INFO L225 Difference]: With dead ends: 2324 [2021-06-05 03:52:49,611 INFO L226 Difference]: Without dead ends: 2317 [2021-06-05 03:52:49,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 221.5ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:52:49,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-06-05 03:52:49,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2083. [2021-06-05 03:52:49,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:49,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2021-06-05 03:52:49,635 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2021-06-05 03:52:49,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:49,635 INFO L482 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2021-06-05 03:52:49,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:49,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2021-06-05 03:52:49,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:52:49,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:49,637 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:49,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:49,837 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:49,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:49,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1740726379, now seen corresponding path program 163 times [2021-06-05 03:52:49,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:49,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280516193] [2021-06-05 03:52:49,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:49,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:49,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280516193] [2021-06-05 03:52:49,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280516193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:49,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161927573] [2021-06-05 03:52:49,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:49,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:52:49,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:50,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161927573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:50,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:50,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 03:52:50,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419894251] [2021-06-05 03:52:50,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:50,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:50,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:50,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:50,102 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:50,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:50,393 INFO L93 Difference]: Finished difference Result 2260 states and 6660 transitions. [2021-06-05 03:52:50,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:52:50,393 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:52:50,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:50,396 INFO L225 Difference]: With dead ends: 2260 [2021-06-05 03:52:50,396 INFO L226 Difference]: Without dead ends: 2253 [2021-06-05 03:52:50,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 230.5ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:52:50,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-06-05 03:52:50,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 2083. [2021-06-05 03:52:50,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:50,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2021-06-05 03:52:50,423 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2021-06-05 03:52:50,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:50,423 INFO L482 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2021-06-05 03:52:50,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:50,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2021-06-05 03:52:50,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:52:50,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:50,425 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:50,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-05 03:52:50,626 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:50,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:50,626 INFO L82 PathProgramCache]: Analyzing trace with hash -922738373, now seen corresponding path program 164 times [2021-06-05 03:52:50,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:50,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183452072] [2021-06-05 03:52:50,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:50,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:50,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:50,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183452072] [2021-06-05 03:52:50,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183452072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:50,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085365769] [2021-06-05 03:52:50,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:50,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:50,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:50,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:52:50,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:50,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085365769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:50,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:50,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-06-05 03:52:50,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279251861] [2021-06-05 03:52:50,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:50,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:50,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:50,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:50,878 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:51,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:51,033 INFO L93 Difference]: Finished difference Result 2270 states and 6764 transitions. [2021-06-05 03:52:51,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:52:51,033 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:52:51,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:51,035 INFO L225 Difference]: With dead ends: 2270 [2021-06-05 03:52:51,035 INFO L226 Difference]: Without dead ends: 2263 [2021-06-05 03:52:51,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:52:51,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-06-05 03:52:51,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2113. [2021-06-05 03:52:51,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.071022727272727) internal successors, (6486), 2112 states have internal predecessors, (6486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:51,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6486 transitions. [2021-06-05 03:52:51,057 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6486 transitions. Word has length 21 [2021-06-05 03:52:51,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:51,057 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 6486 transitions. [2021-06-05 03:52:51,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:51,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6486 transitions. [2021-06-05 03:52:51,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:52:51,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:51,059 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:51,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 03:52:51,260 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:51,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:51,260 INFO L82 PathProgramCache]: Analyzing trace with hash 691964351, now seen corresponding path program 165 times [2021-06-05 03:52:51,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:51,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961888310] [2021-06-05 03:52:51,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:51,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:51,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961888310] [2021-06-05 03:52:51,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961888310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:51,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662461831] [2021-06-05 03:52:51,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:51,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:52:51,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:51,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:52:51,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:51,507 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:51,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662461831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:51,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:51,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-06-05 03:52:51,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277045438] [2021-06-05 03:52:51,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:51,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:51,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:51,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:51,508 INFO L87 Difference]: Start difference. First operand 2113 states and 6486 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:51,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:51,666 INFO L93 Difference]: Finished difference Result 2271 states and 6761 transitions. [2021-06-05 03:52:51,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:52:51,667 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:52:51,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:51,669 INFO L225 Difference]: With dead ends: 2271 [2021-06-05 03:52:51,669 INFO L226 Difference]: Without dead ends: 2262 [2021-06-05 03:52:51,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:52:51,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-06-05 03:52:51,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2113. [2021-06-05 03:52:51,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.069128787878788) internal successors, (6482), 2112 states have internal predecessors, (6482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:51,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6482 transitions. [2021-06-05 03:52:51,692 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6482 transitions. Word has length 21 [2021-06-05 03:52:51,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:51,692 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 6482 transitions. [2021-06-05 03:52:51,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:51,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6482 transitions. [2021-06-05 03:52:51,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:52:51,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:51,694 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:51,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-06-05 03:52:51,909 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:51,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:51,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1387329477, now seen corresponding path program 166 times [2021-06-05 03:52:51,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:51,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130682310] [2021-06-05 03:52:51,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:52,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:52,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130682310] [2021-06-05 03:52:52,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130682310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:52,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259566644] [2021-06-05 03:52:52,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:52,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:52,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:52,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:52:52,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:52,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259566644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:52,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:52,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-06-05 03:52:52,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133893877] [2021-06-05 03:52:52,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:52,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:52,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:52,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:52,156 INFO L87 Difference]: Start difference. First operand 2113 states and 6482 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:52,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:52,314 INFO L93 Difference]: Finished difference Result 2235 states and 6688 transitions. [2021-06-05 03:52:52,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:52:52,314 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:52:52,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:52,317 INFO L225 Difference]: With dead ends: 2235 [2021-06-05 03:52:52,317 INFO L226 Difference]: Without dead ends: 2228 [2021-06-05 03:52:52,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 210.5ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:52:52,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-06-05 03:52:52,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2113. [2021-06-05 03:52:52,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.069128787878788) internal successors, (6482), 2112 states have internal predecessors, (6482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:52,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6482 transitions. [2021-06-05 03:52:52,339 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6482 transitions. Word has length 21 [2021-06-05 03:52:52,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:52,339 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 6482 transitions. [2021-06-05 03:52:52,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:52,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6482 transitions. [2021-06-05 03:52:52,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:52:52,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:52,341 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:52,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:52,541 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:52,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:52,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1867302015, now seen corresponding path program 167 times [2021-06-05 03:52:52,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:52,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757787178] [2021-06-05 03:52:52,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:52,658 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:52,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:52,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757787178] [2021-06-05 03:52:52,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757787178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:52,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106339506] [2021-06-05 03:52:52,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:52,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:52:52,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:52,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:52:52,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:52,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106339506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:52,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:52,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 03:52:52,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448071415] [2021-06-05 03:52:52,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:52:52,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:52,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:52:52,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:52:52,785 INFO L87 Difference]: Start difference. First operand 2113 states and 6482 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:52,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:52,992 INFO L93 Difference]: Finished difference Result 2462 states and 7260 transitions. [2021-06-05 03:52:52,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:52:52,992 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:52:52,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:52,995 INFO L225 Difference]: With dead ends: 2462 [2021-06-05 03:52:52,995 INFO L226 Difference]: Without dead ends: 2445 [2021-06-05 03:52:52,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 229.8ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:52:52,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-06-05 03:52:53,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2200. [2021-06-05 03:52:53,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 3.083674397453388) internal successors, (6781), 2199 states have internal predecessors, (6781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:53,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 6781 transitions. [2021-06-05 03:52:53,018 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 6781 transitions. Word has length 21 [2021-06-05 03:52:53,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:53,018 INFO L482 AbstractCegarLoop]: Abstraction has 2200 states and 6781 transitions. [2021-06-05 03:52:53,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:53,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 6781 transitions. [2021-06-05 03:52:53,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:52:53,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:53,020 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:53,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-05 03:52:53,221 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:53,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:53,221 INFO L82 PathProgramCache]: Analyzing trace with hash -812962557, now seen corresponding path program 168 times [2021-06-05 03:52:53,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:53,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764285310] [2021-06-05 03:52:53,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:53,316 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:53,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:53,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764285310] [2021-06-05 03:52:53,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764285310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:53,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901212580] [2021-06-05 03:52:53,317 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:53,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:52:53,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:53,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:52:53,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:53,454 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:53,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901212580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:53,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:53,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 03:52:53,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049899709] [2021-06-05 03:52:53,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:52:53,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:53,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:52:53,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:52:53,455 INFO L87 Difference]: Start difference. First operand 2200 states and 6781 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:53,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:53,661 INFO L93 Difference]: Finished difference Result 2464 states and 7241 transitions. [2021-06-05 03:52:53,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:52:53,661 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:52:53,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:53,664 INFO L225 Difference]: With dead ends: 2464 [2021-06-05 03:52:53,664 INFO L226 Difference]: Without dead ends: 2446 [2021-06-05 03:52:53,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 224.0ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:52:53,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-06-05 03:52:53,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2176. [2021-06-05 03:52:53,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.0744827586206895) internal successors, (6687), 2175 states have internal predecessors, (6687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:53,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 6687 transitions. [2021-06-05 03:52:53,691 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 6687 transitions. Word has length 21 [2021-06-05 03:52:53,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:53,691 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 6687 transitions. [2021-06-05 03:52:53,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:53,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 6687 transitions. [2021-06-05 03:52:53,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:52:53,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:53,694 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:53,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:53,911 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:53,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:53,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1402710911, now seen corresponding path program 169 times [2021-06-05 03:52:53,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:53,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428353532] [2021-06-05 03:52:53,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:54,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:54,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428353532] [2021-06-05 03:52:54,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428353532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:54,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982816169] [2021-06-05 03:52:54,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:54,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:52:54,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:54,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982816169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:54,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:54,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 03:52:54,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996704402] [2021-06-05 03:52:54,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:54,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:54,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:54,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:54,167 INFO L87 Difference]: Start difference. First operand 2176 states and 6687 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:54,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:54,426 INFO L93 Difference]: Finished difference Result 2405 states and 7080 transitions. [2021-06-05 03:52:54,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:52:54,427 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:52:54,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:54,430 INFO L225 Difference]: With dead ends: 2405 [2021-06-05 03:52:54,430 INFO L226 Difference]: Without dead ends: 2383 [2021-06-05 03:52:54,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 250.8ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:52:54,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-06-05 03:52:54,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 2168. [2021-06-05 03:52:54,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 3.0724503922473465) internal successors, (6658), 2167 states have internal predecessors, (6658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:54,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 6658 transitions. [2021-06-05 03:52:54,454 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 6658 transitions. Word has length 21 [2021-06-05 03:52:54,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:54,454 INFO L482 AbstractCegarLoop]: Abstraction has 2168 states and 6658 transitions. [2021-06-05 03:52:54,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:54,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 6658 transitions. [2021-06-05 03:52:54,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:52:54,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:54,456 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:54,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:54,656 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:54,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:54,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1369111683, now seen corresponding path program 170 times [2021-06-05 03:52:54,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:54,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826233241] [2021-06-05 03:52:54,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:54,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:54,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826233241] [2021-06-05 03:52:54,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826233241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:54,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866680802] [2021-06-05 03:52:54,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:54,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:54,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:54,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:52:54,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:54,879 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:54,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866680802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:54,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:54,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 03:52:54,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647666674] [2021-06-05 03:52:54,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:54,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:54,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:54,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:54,880 INFO L87 Difference]: Start difference. First operand 2168 states and 6658 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:55,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:55,067 INFO L93 Difference]: Finished difference Result 2338 states and 6943 transitions. [2021-06-05 03:52:55,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:52:55,067 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:52:55,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:55,070 INFO L225 Difference]: With dead ends: 2338 [2021-06-05 03:52:55,070 INFO L226 Difference]: Without dead ends: 2331 [2021-06-05 03:52:55,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:52:55,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-06-05 03:52:55,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2168. [2021-06-05 03:52:55,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 3.0724503922473465) internal successors, (6658), 2167 states have internal predecessors, (6658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:55,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 6658 transitions. [2021-06-05 03:52:55,094 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 6658 transitions. Word has length 21 [2021-06-05 03:52:55,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:55,094 INFO L482 AbstractCegarLoop]: Abstraction has 2168 states and 6658 transitions. [2021-06-05 03:52:55,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:55,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 6658 transitions. [2021-06-05 03:52:55,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:52:55,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:55,097 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:55,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:55,297 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:55,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:55,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1898222891, now seen corresponding path program 171 times [2021-06-05 03:52:55,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:55,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86617549] [2021-06-05 03:52:55,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:55,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:55,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86617549] [2021-06-05 03:52:55,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86617549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:55,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105149691] [2021-06-05 03:52:55,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:55,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:52:55,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:55,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:52:55,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:55,517 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:55,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105149691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:55,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:55,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-06-05 03:52:55,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86976258] [2021-06-05 03:52:55,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:55,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:55,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:55,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:55,518 INFO L87 Difference]: Start difference. First operand 2168 states and 6658 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:55,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:55,678 INFO L93 Difference]: Finished difference Result 2327 states and 6929 transitions. [2021-06-05 03:52:55,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:52:55,679 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:52:55,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:55,682 INFO L225 Difference]: With dead ends: 2327 [2021-06-05 03:52:55,682 INFO L226 Difference]: Without dead ends: 2314 [2021-06-05 03:52:55,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 184.5ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:52:55,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-06-05 03:52:55,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2158. [2021-06-05 03:52:55,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 2157 states have (on average 3.0686138154844693) internal successors, (6619), 2157 states have internal predecessors, (6619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:55,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 6619 transitions. [2021-06-05 03:52:55,715 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 6619 transitions. Word has length 21 [2021-06-05 03:52:55,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:55,715 INFO L482 AbstractCegarLoop]: Abstraction has 2158 states and 6619 transitions. [2021-06-05 03:52:55,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:55,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 6619 transitions. [2021-06-05 03:52:55,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:52:55,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:55,717 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:55,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 03:52:55,918 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:55,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:55,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1835759173, now seen corresponding path program 172 times [2021-06-05 03:52:55,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:55,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16304380] [2021-06-05 03:52:55,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:56,013 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:56,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:56,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16304380] [2021-06-05 03:52:56,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16304380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:56,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318200347] [2021-06-05 03:52:56,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:56,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:56,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:56,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:52:56,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:56,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318200347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:56,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:56,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-05 03:52:56,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317492753] [2021-06-05 03:52:56,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:56,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:56,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:56,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:56,126 INFO L87 Difference]: Start difference. First operand 2158 states and 6619 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:56,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:56,350 INFO L93 Difference]: Finished difference Result 2518 states and 7412 transitions. [2021-06-05 03:52:56,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:52:56,351 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:52:56,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:56,354 INFO L225 Difference]: With dead ends: 2518 [2021-06-05 03:52:56,354 INFO L226 Difference]: Without dead ends: 2501 [2021-06-05 03:52:56,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 193.2ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:52:56,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2021-06-05 03:52:56,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 2261. [2021-06-05 03:52:56,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2261 states, 2260 states have (on average 3.084070796460177) internal successors, (6970), 2260 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:56,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2261 states to 2261 states and 6970 transitions. [2021-06-05 03:52:56,381 INFO L78 Accepts]: Start accepts. Automaton has 2261 states and 6970 transitions. Word has length 21 [2021-06-05 03:52:56,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:56,381 INFO L482 AbstractCegarLoop]: Abstraction has 2261 states and 6970 transitions. [2021-06-05 03:52:56,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:56,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2261 states and 6970 transitions. [2021-06-05 03:52:56,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:52:56,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:56,383 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:56,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-05 03:52:56,585 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:56,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:56,585 INFO L82 PathProgramCache]: Analyzing trace with hash -221056449, now seen corresponding path program 173 times [2021-06-05 03:52:56,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:56,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289379180] [2021-06-05 03:52:56,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:56,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:56,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289379180] [2021-06-05 03:52:56,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289379180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:56,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713367543] [2021-06-05 03:52:56,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:56,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:52:56,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:56,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:52:56,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:56,789 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:56,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713367543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:56,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:56,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-05 03:52:56,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958909938] [2021-06-05 03:52:56,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:56,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:56,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:56,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:56,790 INFO L87 Difference]: Start difference. First operand 2261 states and 6970 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:57,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:57,003 INFO L93 Difference]: Finished difference Result 2516 states and 7381 transitions. [2021-06-05 03:52:57,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:52:57,003 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:52:57,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:57,006 INFO L225 Difference]: With dead ends: 2516 [2021-06-05 03:52:57,006 INFO L226 Difference]: Without dead ends: 2498 [2021-06-05 03:52:57,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 193.7ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:52:57,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-06-05 03:52:57,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2230. [2021-06-05 03:52:57,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 3.0744728577837597) internal successors, (6853), 2229 states have internal predecessors, (6853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:57,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 6853 transitions. [2021-06-05 03:52:57,038 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 6853 transitions. Word has length 21 [2021-06-05 03:52:57,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:57,039 INFO L482 AbstractCegarLoop]: Abstraction has 2230 states and 6853 transitions. [2021-06-05 03:52:57,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:57,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 6853 transitions. [2021-06-05 03:52:57,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:52:57,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:57,041 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:57,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:57,241 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:57,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:57,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1994617019, now seen corresponding path program 174 times [2021-06-05 03:52:57,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:57,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882320434] [2021-06-05 03:52:57,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:57,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:57,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:57,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882320434] [2021-06-05 03:52:57,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882320434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:57,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708759748] [2021-06-05 03:52:57,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:57,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:52:57,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:57,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:52:57,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:57,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708759748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:57,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:57,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-05 03:52:57,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713816101] [2021-06-05 03:52:57,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:57,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:57,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:57,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:57,455 INFO L87 Difference]: Start difference. First operand 2230 states and 6853 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:57,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:57,701 INFO L93 Difference]: Finished difference Result 2507 states and 7296 transitions. [2021-06-05 03:52:57,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:52:57,701 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:52:57,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:57,704 INFO L225 Difference]: With dead ends: 2507 [2021-06-05 03:52:57,704 INFO L226 Difference]: Without dead ends: 2485 [2021-06-05 03:52:57,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 203.5ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:52:57,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2021-06-05 03:52:57,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 2217. [2021-06-05 03:52:57,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2216 states have (on average 3.0699458483754514) internal successors, (6803), 2216 states have internal predecessors, (6803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:57,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 6803 transitions. [2021-06-05 03:52:57,729 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 6803 transitions. Word has length 21 [2021-06-05 03:52:57,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:57,729 INFO L482 AbstractCegarLoop]: Abstraction has 2217 states and 6803 transitions. [2021-06-05 03:52:57,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:57,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 6803 transitions. [2021-06-05 03:52:57,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:52:57,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:57,731 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:57,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-06-05 03:52:57,931 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:57,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:57,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1961017791, now seen corresponding path program 175 times [2021-06-05 03:52:57,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:57,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375122969] [2021-06-05 03:52:57,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:58,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:58,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375122969] [2021-06-05 03:52:58,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375122969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:58,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427864] [2021-06-05 03:52:58,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:58,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:58,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:52:58,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:58,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:58,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:58,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-05 03:52:58,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207988188] [2021-06-05 03:52:58,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:58,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:58,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:58,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:58,146 INFO L87 Difference]: Start difference. First operand 2217 states and 6803 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:58,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:58,409 INFO L93 Difference]: Finished difference Result 2454 states and 7183 transitions. [2021-06-05 03:52:58,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:52:58,410 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:52:58,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:58,413 INFO L225 Difference]: With dead ends: 2454 [2021-06-05 03:52:58,413 INFO L226 Difference]: Without dead ends: 2428 [2021-06-05 03:52:58,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 224.4ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:52:58,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-06-05 03:52:58,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2206. [2021-06-05 03:52:58,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 3.068934240362812) internal successors, (6767), 2205 states have internal predecessors, (6767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:58,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 6767 transitions. [2021-06-05 03:52:58,447 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 6767 transitions. Word has length 21 [2021-06-05 03:52:58,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:58,447 INFO L482 AbstractCegarLoop]: Abstraction has 2206 states and 6767 transitions. [2021-06-05 03:52:58,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:58,447 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 6767 transitions. [2021-06-05 03:52:58,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:52:58,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:58,449 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:58,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-05 03:52:58,661 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:58,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:58,661 INFO L82 PathProgramCache]: Analyzing trace with hash 919441723, now seen corresponding path program 176 times [2021-06-05 03:52:58,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:58,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032373668] [2021-06-05 03:52:58,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:58,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:58,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032373668] [2021-06-05 03:52:58,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032373668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:58,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309031664] [2021-06-05 03:52:58,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:58,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:58,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:58,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:52:58,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:58,876 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:58,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309031664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:58,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:58,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-05 03:52:58,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602815284] [2021-06-05 03:52:58,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:58,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:58,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:58,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:58,877 INFO L87 Difference]: Start difference. First operand 2206 states and 6767 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:59,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:59,126 INFO L93 Difference]: Finished difference Result 2375 states and 7031 transitions. [2021-06-05 03:52:59,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:52:59,127 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:52:59,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:59,130 INFO L225 Difference]: With dead ends: 2375 [2021-06-05 03:52:59,130 INFO L226 Difference]: Without dead ends: 2368 [2021-06-05 03:52:59,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 211.4ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:52:59,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2021-06-05 03:52:59,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 2208. [2021-06-05 03:52:59,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 3.067512460353421) internal successors, (6770), 2207 states have internal predecessors, (6770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:59,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 6770 transitions. [2021-06-05 03:52:59,155 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 6770 transitions. Word has length 21 [2021-06-05 03:52:59,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:59,155 INFO L482 AbstractCegarLoop]: Abstraction has 2208 states and 6770 transitions. [2021-06-05 03:52:59,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:59,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 6770 transitions. [2021-06-05 03:52:59,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:52:59,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:59,157 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:59,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:59,358 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:59,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:59,358 INFO L82 PathProgramCache]: Analyzing trace with hash -420518503, now seen corresponding path program 177 times [2021-06-05 03:52:59,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:59,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895687033] [2021-06-05 03:52:59,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:59,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:59,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895687033] [2021-06-05 03:52:59,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895687033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:59,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654523796] [2021-06-05 03:52:59,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:59,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:52:59,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:59,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:52:59,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:59,591 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:59,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654523796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:59,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:59,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-06-05 03:52:59,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230259414] [2021-06-05 03:52:59,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:52:59,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:59,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:52:59,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:59,592 INFO L87 Difference]: Start difference. First operand 2208 states and 6770 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:59,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:59,750 INFO L93 Difference]: Finished difference Result 2298 states and 6916 transitions. [2021-06-05 03:52:59,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:52:59,750 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:52:59,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:59,753 INFO L225 Difference]: With dead ends: 2298 [2021-06-05 03:52:59,753 INFO L226 Difference]: Without dead ends: 2285 [2021-06-05 03:52:59,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 195.0ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:52:59,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-05 03:52:59,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2196. [2021-06-05 03:52:59,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 3.0674259681093394) internal successors, (6733), 2195 states have internal predecessors, (6733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:59,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 6733 transitions. [2021-06-05 03:52:59,775 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 6733 transitions. Word has length 21 [2021-06-05 03:52:59,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:59,785 INFO L482 AbstractCegarLoop]: Abstraction has 2196 states and 6733 transitions. [2021-06-05 03:52:59,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:59,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 6733 transitions. [2021-06-05 03:52:59,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:52:59,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:59,788 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:59,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:59,989 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:59,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:59,989 INFO L82 PathProgramCache]: Analyzing trace with hash -666539009, now seen corresponding path program 178 times [2021-06-05 03:52:59,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:59,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480610697] [2021-06-05 03:52:59,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:00,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:00,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480610697] [2021-06-05 03:53:00,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480610697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:00,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878838858] [2021-06-05 03:53:00,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:00,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:00,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:00,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:53:00,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:00,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878838858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:00,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:00,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 03:53:00,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970981027] [2021-06-05 03:53:00,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:00,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:00,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:00,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:00,206 INFO L87 Difference]: Start difference. First operand 2196 states and 6733 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:00,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:00,437 INFO L93 Difference]: Finished difference Result 2566 states and 7558 transitions. [2021-06-05 03:53:00,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:53:00,437 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:00,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:00,440 INFO L225 Difference]: With dead ends: 2566 [2021-06-05 03:53:00,440 INFO L226 Difference]: Without dead ends: 2549 [2021-06-05 03:53:00,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 197.3ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:53:00,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2021-06-05 03:53:00,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 2334. [2021-06-05 03:53:00,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2333 states have (on average 3.072438919845692) internal successors, (7168), 2333 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:00,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 7168 transitions. [2021-06-05 03:53:00,464 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 7168 transitions. Word has length 21 [2021-06-05 03:53:00,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:00,464 INFO L482 AbstractCegarLoop]: Abstraction has 2334 states and 7168 transitions. [2021-06-05 03:53:00,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:00,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 7168 transitions. [2021-06-05 03:53:00,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:00,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:00,467 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:00,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:00,669 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:00,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:00,669 INFO L82 PathProgramCache]: Analyzing trace with hash 948163715, now seen corresponding path program 179 times [2021-06-05 03:53:00,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:00,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560694582] [2021-06-05 03:53:00,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:00,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:00,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560694582] [2021-06-05 03:53:00,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560694582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:00,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351017967] [2021-06-05 03:53:00,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:00,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:53:00,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:00,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:53:00,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:00,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351017967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:00,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:00,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 03:53:00,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059412412] [2021-06-05 03:53:00,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:00,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:00,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:00,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:00,911 INFO L87 Difference]: Start difference. First operand 2334 states and 7168 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:01,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:01,109 INFO L93 Difference]: Finished difference Result 2564 states and 7531 transitions. [2021-06-05 03:53:01,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:53:01,109 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:01,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:01,111 INFO L225 Difference]: With dead ends: 2564 [2021-06-05 03:53:01,112 INFO L226 Difference]: Without dead ends: 2548 [2021-06-05 03:53:01,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 212.8ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:53:01,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-06-05 03:53:01,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 2315. [2021-06-05 03:53:01,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2315 states, 2314 states have (on average 3.066983578219533) internal successors, (7097), 2314 states have internal predecessors, (7097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:01,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2315 states to 2315 states and 7097 transitions. [2021-06-05 03:53:01,136 INFO L78 Accepts]: Start accepts. Automaton has 2315 states and 7097 transitions. Word has length 21 [2021-06-05 03:53:01,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:01,136 INFO L482 AbstractCegarLoop]: Abstraction has 2315 states and 7097 transitions. [2021-06-05 03:53:01,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:01,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2315 states and 7097 transitions. [2021-06-05 03:53:01,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:01,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:01,138 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:01,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-05 03:53:01,338 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:01,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:01,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1131130113, now seen corresponding path program 180 times [2021-06-05 03:53:01,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:01,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241119235] [2021-06-05 03:53:01,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:01,439 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:01,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:01,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241119235] [2021-06-05 03:53:01,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241119235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:01,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364091611] [2021-06-05 03:53:01,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:01,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:53:01,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:01,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:53:01,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:01,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364091611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:01,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:01,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 03:53:01,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275283421] [2021-06-05 03:53:01,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:01,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:01,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:01,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:01,562 INFO L87 Difference]: Start difference. First operand 2315 states and 7097 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:01,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:01,807 INFO L93 Difference]: Finished difference Result 2571 states and 7503 transitions. [2021-06-05 03:53:01,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:53:01,807 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:01,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:01,810 INFO L225 Difference]: With dead ends: 2571 [2021-06-05 03:53:01,810 INFO L226 Difference]: Without dead ends: 2553 [2021-06-05 03:53:01,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 212.5ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:53:01,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-06-05 03:53:01,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2295. [2021-06-05 03:53:01,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 2294 states have (on average 3.0610287707061903) internal successors, (7022), 2294 states have internal predecessors, (7022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:01,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 7022 transitions. [2021-06-05 03:53:01,836 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 7022 transitions. Word has length 21 [2021-06-05 03:53:01,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:01,836 INFO L482 AbstractCegarLoop]: Abstraction has 2295 states and 7022 transitions. [2021-06-05 03:53:01,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:01,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 7022 transitions. [2021-06-05 03:53:01,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:01,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:01,838 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:02,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-05 03:53:02,038 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:02,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:02,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1164729341, now seen corresponding path program 181 times [2021-06-05 03:53:02,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:02,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358931950] [2021-06-05 03:53:02,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:02,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:02,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:02,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358931950] [2021-06-05 03:53:02,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358931950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:02,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32443872] [2021-06-05 03:53:02,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:02,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:02,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:53:02,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:02,245 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:02,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32443872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:02,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:02,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 03:53:02,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218621032] [2021-06-05 03:53:02,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:02,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:02,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:02,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:02,246 INFO L87 Difference]: Start difference. First operand 2295 states and 7022 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:02,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:02,498 INFO L93 Difference]: Finished difference Result 2576 states and 7464 transitions. [2021-06-05 03:53:02,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:53:02,498 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:02,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:02,501 INFO L225 Difference]: With dead ends: 2576 [2021-06-05 03:53:02,501 INFO L226 Difference]: Without dead ends: 2556 [2021-06-05 03:53:02,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 221.9ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:53:02,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-06-05 03:53:02,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2276. [2021-06-05 03:53:02,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 3.0567032967032968) internal successors, (6954), 2275 states have internal predecessors, (6954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:02,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 6954 transitions. [2021-06-05 03:53:02,535 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 6954 transitions. Word has length 21 [2021-06-05 03:53:02,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:02,535 INFO L482 AbstractCegarLoop]: Abstraction has 2276 states and 6954 transitions. [2021-06-05 03:53:02,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:02,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 6954 transitions. [2021-06-05 03:53:02,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:02,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:02,537 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:02,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-06-05 03:53:02,737 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:02,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:02,738 INFO L82 PathProgramCache]: Analyzing trace with hash 2088661887, now seen corresponding path program 182 times [2021-06-05 03:53:02,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:02,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388382650] [2021-06-05 03:53:02,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:02,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:02,832 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:02,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:02,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388382650] [2021-06-05 03:53:02,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388382650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:02,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032864939] [2021-06-05 03:53:02,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:02,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:02,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:02,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:53:02,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:02,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032864939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:02,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:02,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 03:53:02,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390859042] [2021-06-05 03:53:02,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:02,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:02,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:02,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:02,948 INFO L87 Difference]: Start difference. First operand 2276 states and 6954 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:03,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:03,247 INFO L93 Difference]: Finished difference Result 2488 states and 7287 transitions. [2021-06-05 03:53:03,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:53:03,247 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:03,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:03,250 INFO L225 Difference]: With dead ends: 2488 [2021-06-05 03:53:03,250 INFO L226 Difference]: Without dead ends: 2466 [2021-06-05 03:53:03,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 236.9ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:53:03,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2021-06-05 03:53:03,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 2256. [2021-06-05 03:53:03,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 3.0594235033259425) internal successors, (6899), 2255 states have internal predecessors, (6899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:03,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6899 transitions. [2021-06-05 03:53:03,276 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6899 transitions. Word has length 21 [2021-06-05 03:53:03,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:03,276 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 6899 transitions. [2021-06-05 03:53:03,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:03,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6899 transitions. [2021-06-05 03:53:03,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:03,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:03,278 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:03,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 03:53:03,478 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:03,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:03,479 INFO L82 PathProgramCache]: Analyzing trace with hash -135425149, now seen corresponding path program 183 times [2021-06-05 03:53:03,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:03,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453045510] [2021-06-05 03:53:03,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:03,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:03,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453045510] [2021-06-05 03:53:03,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453045510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:03,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688084318] [2021-06-05 03:53:03,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:03,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:53:03,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:03,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:53:03,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:03,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688084318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:03,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:03,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 03:53:03,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729169417] [2021-06-05 03:53:03,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:03,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:03,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:03,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:03,706 INFO L87 Difference]: Start difference. First operand 2256 states and 6899 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:03,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:03,980 INFO L93 Difference]: Finished difference Result 2408 states and 7132 transitions. [2021-06-05 03:53:03,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:53:03,980 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:03,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:03,983 INFO L225 Difference]: With dead ends: 2408 [2021-06-05 03:53:03,983 INFO L226 Difference]: Without dead ends: 2401 [2021-06-05 03:53:03,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 235.5ms TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:53:03,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2021-06-05 03:53:04,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 2266. [2021-06-05 03:53:04,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2266 states, 2265 states have (on average 3.0525386313465783) internal successors, (6914), 2265 states have internal predecessors, (6914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:04,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2266 states to 2266 states and 6914 transitions. [2021-06-05 03:53:04,006 INFO L78 Accepts]: Start accepts. Automaton has 2266 states and 6914 transitions. Word has length 21 [2021-06-05 03:53:04,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:04,006 INFO L482 AbstractCegarLoop]: Abstraction has 2266 states and 6914 transitions. [2021-06-05 03:53:04,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:04,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2266 states and 6914 transitions. [2021-06-05 03:53:04,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:04,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:04,009 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:04,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:04,209 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:04,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:04,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1867189759, now seen corresponding path program 184 times [2021-06-05 03:53:04,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:04,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877001885] [2021-06-05 03:53:04,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:04,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:04,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877001885] [2021-06-05 03:53:04,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877001885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:04,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110958087] [2021-06-05 03:53:04,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:04,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:04,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:04,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:53:04,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:04,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110958087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:04,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:04,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-06-05 03:53:04,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224532491] [2021-06-05 03:53:04,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:04,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:04,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:04,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:04,433 INFO L87 Difference]: Start difference. First operand 2266 states and 6914 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:04,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:04,591 INFO L93 Difference]: Finished difference Result 2482 states and 7361 transitions. [2021-06-05 03:53:04,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:53:04,592 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:04,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:04,595 INFO L225 Difference]: With dead ends: 2482 [2021-06-05 03:53:04,595 INFO L226 Difference]: Without dead ends: 2472 [2021-06-05 03:53:04,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 198.9ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:53:04,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-06-05 03:53:04,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2293. [2021-06-05 03:53:04,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2292 states have (on average 3.0584642233856894) internal successors, (7010), 2292 states have internal predecessors, (7010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:04,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 7010 transitions. [2021-06-05 03:53:04,624 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 7010 transitions. Word has length 21 [2021-06-05 03:53:04,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:04,624 INFO L482 AbstractCegarLoop]: Abstraction has 2293 states and 7010 transitions. [2021-06-05 03:53:04,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:04,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 7010 transitions. [2021-06-05 03:53:04,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:04,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:04,626 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:04,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:04,827 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:04,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:04,827 INFO L82 PathProgramCache]: Analyzing trace with hash -813074813, now seen corresponding path program 185 times [2021-06-05 03:53:04,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:04,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463668966] [2021-06-05 03:53:04,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:04,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:04,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463668966] [2021-06-05 03:53:04,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463668966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:04,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852932082] [2021-06-05 03:53:04,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:04,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:53:04,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:04,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:53:04,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:05,062 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:05,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852932082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:05,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:05,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-06-05 03:53:05,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229985439] [2021-06-05 03:53:05,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:05,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:05,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:05,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:05,063 INFO L87 Difference]: Start difference. First operand 2293 states and 7010 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:05,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:05,221 INFO L93 Difference]: Finished difference Result 2464 states and 7323 transitions. [2021-06-05 03:53:05,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:53:05,221 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:05,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:05,224 INFO L225 Difference]: With dead ends: 2464 [2021-06-05 03:53:05,225 INFO L226 Difference]: Without dead ends: 2457 [2021-06-05 03:53:05,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 198.9ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:05,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-06-05 03:53:05,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2291. [2021-06-05 03:53:05,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 3.05764192139738) internal successors, (7002), 2290 states have internal predecessors, (7002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 7002 transitions. [2021-06-05 03:53:05,258 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 7002 transitions. Word has length 21 [2021-06-05 03:53:05,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:05,258 INFO L482 AbstractCegarLoop]: Abstraction has 2291 states and 7002 transitions. [2021-06-05 03:53:05,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:05,258 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 7002 transitions. [2021-06-05 03:53:05,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:05,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:05,260 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:05,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable342,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:05,461 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:05,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:05,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1856322731, now seen corresponding path program 186 times [2021-06-05 03:53:05,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:05,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582387876] [2021-06-05 03:53:05,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:05,557 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:05,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:05,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582387876] [2021-06-05 03:53:05,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582387876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:05,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072853289] [2021-06-05 03:53:05,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:05,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:53:05,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:05,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:53:05,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:05,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072853289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:05,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:05,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-06-05 03:53:05,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787917901] [2021-06-05 03:53:05,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:05,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:05,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:05,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:05,691 INFO L87 Difference]: Start difference. First operand 2291 states and 7002 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:05,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:05,833 INFO L93 Difference]: Finished difference Result 2417 states and 7217 transitions. [2021-06-05 03:53:05,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:53:05,833 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:05,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:05,836 INFO L225 Difference]: With dead ends: 2417 [2021-06-05 03:53:05,836 INFO L226 Difference]: Without dead ends: 2410 [2021-06-05 03:53:05,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 195.3ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:53:05,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-06-05 03:53:05,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 2290. [2021-06-05 03:53:05,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2290 states, 2289 states have (on average 3.0576671035386633) internal successors, (6999), 2289 states have internal predecessors, (6999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:05,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2290 states to 2290 states and 6999 transitions. [2021-06-05 03:53:05,863 INFO L78 Accepts]: Start accepts. Automaton has 2290 states and 6999 transitions. Word has length 21 [2021-06-05 03:53:05,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:05,863 INFO L482 AbstractCegarLoop]: Abstraction has 2290 states and 6999 transitions. [2021-06-05 03:53:05,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:05,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2290 states and 6999 transitions. [2021-06-05 03:53:05,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:05,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:05,865 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:06,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-05 03:53:06,066 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:06,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:06,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1191597057, now seen corresponding path program 187 times [2021-06-05 03:53:06,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:06,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513543195] [2021-06-05 03:53:06,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:06,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:06,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:06,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513543195] [2021-06-05 03:53:06,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513543195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:06,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118195680] [2021-06-05 03:53:06,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:06,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:06,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:53:06,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:06,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118195680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:06,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:06,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 03:53:06,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580658821] [2021-06-05 03:53:06,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:53:06,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:06,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:53:06,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:53:06,302 INFO L87 Difference]: Start difference. First operand 2290 states and 6999 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:06,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:06,466 INFO L93 Difference]: Finished difference Result 2563 states and 7583 transitions. [2021-06-05 03:53:06,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:53:06,467 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:06,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:06,470 INFO L225 Difference]: With dead ends: 2563 [2021-06-05 03:53:06,470 INFO L226 Difference]: Without dead ends: 2553 [2021-06-05 03:53:06,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 196.6ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:53:06,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-06-05 03:53:06,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2331. [2021-06-05 03:53:06,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 3.06480686695279) internal successors, (7141), 2330 states have internal predecessors, (7141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:06,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 7141 transitions. [2021-06-05 03:53:06,497 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 7141 transitions. Word has length 21 [2021-06-05 03:53:06,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:06,497 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 7141 transitions. [2021-06-05 03:53:06,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:06,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 7141 transitions. [2021-06-05 03:53:06,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:06,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:06,499 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:06,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-06-05 03:53:06,716 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:06,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:06,716 INFO L82 PathProgramCache]: Analyzing trace with hash 423105667, now seen corresponding path program 188 times [2021-06-05 03:53:06,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:06,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407573977] [2021-06-05 03:53:06,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:06,859 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:06,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:06,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407573977] [2021-06-05 03:53:06,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407573977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:06,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730312262] [2021-06-05 03:53:06,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:06,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:06,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:06,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:53:06,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:07,004 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:07,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730312262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:07,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:07,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 03:53:07,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296064118] [2021-06-05 03:53:07,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:53:07,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:07,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:53:07,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:53:07,005 INFO L87 Difference]: Start difference. First operand 2331 states and 7141 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:07,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:07,204 INFO L93 Difference]: Finished difference Result 2544 states and 7541 transitions. [2021-06-05 03:53:07,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:53:07,204 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:07,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:07,208 INFO L225 Difference]: With dead ends: 2544 [2021-06-05 03:53:07,208 INFO L226 Difference]: Without dead ends: 2537 [2021-06-05 03:53:07,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 260.1ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:53:07,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2021-06-05 03:53:07,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 2328. [2021-06-05 03:53:07,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 3.063601203266008) internal successors, (7129), 2327 states have internal predecessors, (7129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:07,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 7129 transitions. [2021-06-05 03:53:07,234 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 7129 transitions. Word has length 21 [2021-06-05 03:53:07,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:07,234 INFO L482 AbstractCegarLoop]: Abstraction has 2328 states and 7129 transitions. [2021-06-05 03:53:07,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:07,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 7129 transitions. [2021-06-05 03:53:07,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:07,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:07,237 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:07,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:07,437 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:07,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:07,437 INFO L82 PathProgramCache]: Analyzing trace with hash -620142251, now seen corresponding path program 189 times [2021-06-05 03:53:07,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:07,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930944838] [2021-06-05 03:53:07,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:07,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:07,539 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:07,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:07,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930944838] [2021-06-05 03:53:07,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930944838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:07,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668181009] [2021-06-05 03:53:07,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:07,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:53:07,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:07,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:53:07,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:07,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668181009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:07,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:07,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 03:53:07,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785657915] [2021-06-05 03:53:07,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:07,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:07,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:07,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:07,697 INFO L87 Difference]: Start difference. First operand 2328 states and 7129 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:07,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:07,904 INFO L93 Difference]: Finished difference Result 2523 states and 7485 transitions. [2021-06-05 03:53:07,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:53:07,904 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:07,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:07,908 INFO L225 Difference]: With dead ends: 2523 [2021-06-05 03:53:07,908 INFO L226 Difference]: Without dead ends: 2510 [2021-06-05 03:53:07,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:53:07,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2021-06-05 03:53:07,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 2329. [2021-06-05 03:53:07,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2329 states, 2328 states have (on average 3.0614261168384878) internal successors, (7127), 2328 states have internal predecessors, (7127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:07,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 7127 transitions. [2021-06-05 03:53:07,932 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 7127 transitions. Word has length 21 [2021-06-05 03:53:07,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:07,933 INFO L482 AbstractCegarLoop]: Abstraction has 2329 states and 7127 transitions. [2021-06-05 03:53:07,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:07,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 7127 transitions. [2021-06-05 03:53:07,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:07,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:07,935 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:08,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-06-05 03:53:08,135 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:08,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:08,135 INFO L82 PathProgramCache]: Analyzing trace with hash -84912449, now seen corresponding path program 190 times [2021-06-05 03:53:08,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:08,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75871188] [2021-06-05 03:53:08,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:08,242 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:08,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:08,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75871188] [2021-06-05 03:53:08,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75871188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:08,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044343832] [2021-06-05 03:53:08,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:08,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:08,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:08,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:53:08,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:08,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044343832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:08,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:08,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 03:53:08,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166944485] [2021-06-05 03:53:08,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:08,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:08,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:08,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:08,365 INFO L87 Difference]: Start difference. First operand 2329 states and 7127 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:08,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:08,565 INFO L93 Difference]: Finished difference Result 2467 states and 7353 transitions. [2021-06-05 03:53:08,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:53:08,566 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:08,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:08,569 INFO L225 Difference]: With dead ends: 2467 [2021-06-05 03:53:08,569 INFO L226 Difference]: Without dead ends: 2460 [2021-06-05 03:53:08,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 208.6ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:53:08,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-06-05 03:53:08,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2327. [2021-06-05 03:53:08,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2327 states, 2326 states have (on average 3.0614789337919173) internal successors, (7121), 2326 states have internal predecessors, (7121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:08,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2327 states to 2327 states and 7121 transitions. [2021-06-05 03:53:08,592 INFO L78 Accepts]: Start accepts. Automaton has 2327 states and 7121 transitions. Word has length 21 [2021-06-05 03:53:08,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:08,592 INFO L482 AbstractCegarLoop]: Abstraction has 2327 states and 7121 transitions. [2021-06-05 03:53:08,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:08,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2327 states and 7121 transitions. [2021-06-05 03:53:08,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:08,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:08,595 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:08,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:08,795 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:08,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:08,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1303821513, now seen corresponding path program 191 times [2021-06-05 03:53:08,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:08,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179403595] [2021-06-05 03:53:08,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:08,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:08,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:08,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179403595] [2021-06-05 03:53:08,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179403595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:08,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456041408] [2021-06-05 03:53:08,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:08,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:53:08,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:08,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:53:08,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:09,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456041408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:09,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:09,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 03:53:09,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674210478] [2021-06-05 03:53:09,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:09,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:09,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:09,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:09,007 INFO L87 Difference]: Start difference. First operand 2327 states and 7121 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:09,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:09,175 INFO L93 Difference]: Finished difference Result 2438 states and 7310 transitions. [2021-06-05 03:53:09,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:53:09,175 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:09,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:09,178 INFO L225 Difference]: With dead ends: 2438 [2021-06-05 03:53:09,178 INFO L226 Difference]: Without dead ends: 2422 [2021-06-05 03:53:09,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:53:09,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-06-05 03:53:09,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 2317. [2021-06-05 03:53:09,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 3.0617443868739205) internal successors, (7091), 2316 states have internal predecessors, (7091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:09,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 7091 transitions. [2021-06-05 03:53:09,202 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 7091 transitions. Word has length 21 [2021-06-05 03:53:09,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:09,202 INFO L482 AbstractCegarLoop]: Abstraction has 2317 states and 7091 transitions. [2021-06-05 03:53:09,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:09,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 7091 transitions. [2021-06-05 03:53:09,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:09,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:09,204 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:09,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:09,404 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:09,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:09,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1524707841, now seen corresponding path program 192 times [2021-06-05 03:53:09,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:09,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129549334] [2021-06-05 03:53:09,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:09,502 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:09,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:09,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129549334] [2021-06-05 03:53:09,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129549334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:09,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185650903] [2021-06-05 03:53:09,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:09,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:53:09,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:09,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:53:09,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:09,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185650903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:09,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:09,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-05 03:53:09,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077165990] [2021-06-05 03:53:09,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:09,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:09,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:09,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:09,638 INFO L87 Difference]: Start difference. First operand 2317 states and 7091 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:09,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:09,813 INFO L93 Difference]: Finished difference Result 2637 states and 7762 transitions. [2021-06-05 03:53:09,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:53:09,813 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:09,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:09,816 INFO L225 Difference]: With dead ends: 2637 [2021-06-05 03:53:09,816 INFO L226 Difference]: Without dead ends: 2627 [2021-06-05 03:53:09,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 204.3ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:53:09,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2627 states. [2021-06-05 03:53:09,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2627 to 2365. [2021-06-05 03:53:09,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2364 states have (on average 3.0697969543147208) internal successors, (7257), 2364 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:09,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 7257 transitions. [2021-06-05 03:53:09,842 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 7257 transitions. Word has length 21 [2021-06-05 03:53:09,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:09,842 INFO L482 AbstractCegarLoop]: Abstraction has 2365 states and 7257 transitions. [2021-06-05 03:53:09,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:09,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 7257 transitions. [2021-06-05 03:53:09,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:09,844 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:09,844 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:10,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:10,045 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:10,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:10,045 INFO L82 PathProgramCache]: Analyzing trace with hash 89994883, now seen corresponding path program 193 times [2021-06-05 03:53:10,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:10,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918750737] [2021-06-05 03:53:10,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:10,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:10,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918750737] [2021-06-05 03:53:10,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918750737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:10,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135616758] [2021-06-05 03:53:10,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:10,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:53:10,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:10,242 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:10,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135616758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:10,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:10,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-05 03:53:10,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619475845] [2021-06-05 03:53:10,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:10,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:10,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:10,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:10,242 INFO L87 Difference]: Start difference. First operand 2365 states and 7257 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:10,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:10,404 INFO L93 Difference]: Finished difference Result 2621 states and 7728 transitions. [2021-06-05 03:53:10,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:53:10,405 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:10,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:10,407 INFO L225 Difference]: With dead ends: 2621 [2021-06-05 03:53:10,407 INFO L226 Difference]: Without dead ends: 2614 [2021-06-05 03:53:10,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 174.1ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:53:10,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2021-06-05 03:53:10,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 2358. [2021-06-05 03:53:10,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2358 states, 2357 states have (on average 3.068731438268986) internal successors, (7233), 2357 states have internal predecessors, (7233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:10,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2358 states to 2358 states and 7233 transitions. [2021-06-05 03:53:10,433 INFO L78 Accepts]: Start accepts. Automaton has 2358 states and 7233 transitions. Word has length 21 [2021-06-05 03:53:10,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:10,433 INFO L482 AbstractCegarLoop]: Abstraction has 2358 states and 7233 transitions. [2021-06-05 03:53:10,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:10,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2358 states and 7233 transitions. [2021-06-05 03:53:10,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:10,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:10,435 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:10,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 03:53:10,636 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:10,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:10,636 INFO L82 PathProgramCache]: Analyzing trace with hash -953253035, now seen corresponding path program 194 times [2021-06-05 03:53:10,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:10,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87768160] [2021-06-05 03:53:10,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:10,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:10,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87768160] [2021-06-05 03:53:10,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87768160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:10,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741627009] [2021-06-05 03:53:10,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:10,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:10,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:10,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:53:10,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:10,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741627009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:10,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:10,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-05 03:53:10,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204969161] [2021-06-05 03:53:10,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:10,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:10,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:10,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:10,857 INFO L87 Difference]: Start difference. First operand 2358 states and 7233 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:11,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:11,031 INFO L93 Difference]: Finished difference Result 2635 states and 7737 transitions. [2021-06-05 03:53:11,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:53:11,032 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:11,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:11,035 INFO L225 Difference]: With dead ends: 2635 [2021-06-05 03:53:11,035 INFO L226 Difference]: Without dead ends: 2622 [2021-06-05 03:53:11,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 181.8ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:53:11,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-06-05 03:53:11,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 2355. [2021-06-05 03:53:11,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2354 states have (on average 3.0671197960917587) internal successors, (7220), 2354 states have internal predecessors, (7220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:11,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 7220 transitions. [2021-06-05 03:53:11,061 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 7220 transitions. Word has length 21 [2021-06-05 03:53:11,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:11,061 INFO L482 AbstractCegarLoop]: Abstraction has 2355 states and 7220 transitions. [2021-06-05 03:53:11,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:11,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 7220 transitions. [2021-06-05 03:53:11,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:11,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:11,063 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:11,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-06-05 03:53:11,264 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:11,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:11,264 INFO L82 PathProgramCache]: Analyzing trace with hash -418023233, now seen corresponding path program 195 times [2021-06-05 03:53:11,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:11,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388940073] [2021-06-05 03:53:11,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:11,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:11,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:11,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388940073] [2021-06-05 03:53:11,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388940073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:11,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711981430] [2021-06-05 03:53:11,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:11,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:53:11,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:11,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:53:11,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:11,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711981430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:11,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:11,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-05 03:53:11,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424004150] [2021-06-05 03:53:11,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:11,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:11,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:11,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:11,467 INFO L87 Difference]: Start difference. First operand 2355 states and 7220 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:11,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:11,681 INFO L93 Difference]: Finished difference Result 2598 states and 7655 transitions. [2021-06-05 03:53:11,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:53:11,682 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:11,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:11,684 INFO L225 Difference]: With dead ends: 2598 [2021-06-05 03:53:11,684 INFO L226 Difference]: Without dead ends: 2582 [2021-06-05 03:53:11,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 201.7ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:53:11,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2021-06-05 03:53:11,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 2352. [2021-06-05 03:53:11,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 3.0659293917481922) internal successors, (7208), 2351 states have internal predecessors, (7208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:11,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 7208 transitions. [2021-06-05 03:53:11,709 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 7208 transitions. Word has length 21 [2021-06-05 03:53:11,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:11,709 INFO L482 AbstractCegarLoop]: Abstraction has 2352 states and 7208 transitions. [2021-06-05 03:53:11,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:11,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 7208 transitions. [2021-06-05 03:53:11,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:53:11,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:11,712 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:11,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:11,912 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:11,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:11,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1005768555, now seen corresponding path program 196 times [2021-06-05 03:53:11,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:11,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503590706] [2021-06-05 03:53:11,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:11,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:12,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:12,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503590706] [2021-06-05 03:53:12,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503590706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:12,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488546524] [2021-06-05 03:53:12,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:12,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:12,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:12,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:53:12,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:12,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488546524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:12,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:12,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-05 03:53:12,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571193171] [2021-06-05 03:53:12,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:12,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:12,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:12,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:12,114 INFO L87 Difference]: Start difference. First operand 2352 states and 7208 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:12,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:12,346 INFO L93 Difference]: Finished difference Result 2537 states and 7524 transitions. [2021-06-05 03:53:12,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:53:12,346 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:53:12,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:12,349 INFO L225 Difference]: With dead ends: 2537 [2021-06-05 03:53:12,349 INFO L226 Difference]: Without dead ends: 2530 [2021-06-05 03:53:12,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 200.7ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:53:12,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-06-05 03:53:12,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2349. [2021-06-05 03:53:12,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2348 states have (on average 3.066013628620102) internal successors, (7199), 2348 states have internal predecessors, (7199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:12,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 7199 transitions. [2021-06-05 03:53:12,374 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 7199 transitions. Word has length 21 [2021-06-05 03:53:12,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:12,374 INFO L482 AbstractCegarLoop]: Abstraction has 2349 states and 7199 transitions. [2021-06-05 03:53:12,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:12,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 7199 transitions. [2021-06-05 03:53:12,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:12,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:12,376 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:12,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-05 03:53:12,576 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:12,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:12,577 INFO L82 PathProgramCache]: Analyzing trace with hash 622856203, now seen corresponding path program 197 times [2021-06-05 03:53:12,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:12,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498326516] [2021-06-05 03:53:12,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:12,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:12,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498326516] [2021-06-05 03:53:12,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498326516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:12,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687683302] [2021-06-05 03:53:12,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:12,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:53:12,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:12,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:12,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:12,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687683302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:12,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:12,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-05 03:53:12,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744447694] [2021-06-05 03:53:12,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:53:12,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:12,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:53:12,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:53:12,718 INFO L87 Difference]: Start difference. First operand 2349 states and 7199 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:12,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:12,828 INFO L93 Difference]: Finished difference Result 3357 states and 10057 transitions. [2021-06-05 03:53:12,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:53:12,828 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:12,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:12,831 INFO L225 Difference]: With dead ends: 3357 [2021-06-05 03:53:12,831 INFO L226 Difference]: Without dead ends: 3337 [2021-06-05 03:53:12,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 141.7ms TimeCoverageRelationStatistics Valid=225, Invalid=645, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:53:12,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3337 states. [2021-06-05 03:53:12,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3337 to 2344. [2021-06-05 03:53:12,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2343 states have (on average 3.0682885189927442) internal successors, (7189), 2343 states have internal predecessors, (7189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:12,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 7189 transitions. [2021-06-05 03:53:12,857 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 7189 transitions. Word has length 22 [2021-06-05 03:53:12,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:12,857 INFO L482 AbstractCegarLoop]: Abstraction has 2344 states and 7189 transitions. [2021-06-05 03:53:12,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:12,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 7189 transitions. [2021-06-05 03:53:12,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:12,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:12,859 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:13,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 03:53:13,060 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:13,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:13,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1555322853, now seen corresponding path program 198 times [2021-06-05 03:53:13,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:13,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199602917] [2021-06-05 03:53:13,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:13,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:13,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199602917] [2021-06-05 03:53:13,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199602917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:13,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239331706] [2021-06-05 03:53:13,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:13,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:53:13,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:13,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:13,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:13,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239331706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:13,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:13,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-05 03:53:13,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823898436] [2021-06-05 03:53:13,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:53:13,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:13,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:53:13,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:53:13,197 INFO L87 Difference]: Start difference. First operand 2344 states and 7189 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:13,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:13,295 INFO L93 Difference]: Finished difference Result 3420 states and 10250 transitions. [2021-06-05 03:53:13,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:53:13,296 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:13,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:13,299 INFO L225 Difference]: With dead ends: 3420 [2021-06-05 03:53:13,299 INFO L226 Difference]: Without dead ends: 3420 [2021-06-05 03:53:13,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 102.7ms TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:53:13,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3420 states. [2021-06-05 03:53:13,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3420 to 2388. [2021-06-05 03:53:13,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 3.0670297444490995) internal successors, (7321), 2387 states have internal predecessors, (7321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:13,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 7321 transitions. [2021-06-05 03:53:13,331 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 7321 transitions. Word has length 22 [2021-06-05 03:53:13,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:13,332 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 7321 transitions. [2021-06-05 03:53:13,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:13,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 7321 transitions. [2021-06-05 03:53:13,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:13,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:13,334 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:13,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-06-05 03:53:13,534 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:13,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:13,535 INFO L82 PathProgramCache]: Analyzing trace with hash -167346353, now seen corresponding path program 199 times [2021-06-05 03:53:13,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:13,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634992678] [2021-06-05 03:53:13,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:13,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:13,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:13,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634992678] [2021-06-05 03:53:13,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634992678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:13,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088240712] [2021-06-05 03:53:13,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:13,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:13,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:13,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088240712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:13,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:13,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 03:53:13,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548353848] [2021-06-05 03:53:13,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:13,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:13,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:13,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:13,703 INFO L87 Difference]: Start difference. First operand 2388 states and 7321 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:14,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:14,179 INFO L93 Difference]: Finished difference Result 4110 states and 12006 transitions. [2021-06-05 03:53:14,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 03:53:14,180 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:14,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:14,185 INFO L225 Difference]: With dead ends: 4110 [2021-06-05 03:53:14,185 INFO L226 Difference]: Without dead ends: 4102 [2021-06-05 03:53:14,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 392.0ms TimeCoverageRelationStatistics Valid=837, Invalid=1713, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 03:53:14,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2021-06-05 03:53:14,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 2823. [2021-06-05 03:53:14,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2823 states, 2822 states have (on average 3.1119773210489017) internal successors, (8782), 2822 states have internal predecessors, (8782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:14,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2823 states to 2823 states and 8782 transitions. [2021-06-05 03:53:14,227 INFO L78 Accepts]: Start accepts. Automaton has 2823 states and 8782 transitions. Word has length 22 [2021-06-05 03:53:14,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:14,227 INFO L482 AbstractCegarLoop]: Abstraction has 2823 states and 8782 transitions. [2021-06-05 03:53:14,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:14,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2823 states and 8782 transitions. [2021-06-05 03:53:14,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:14,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:14,230 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:14,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:14,430 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:14,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:14,430 INFO L82 PathProgramCache]: Analyzing trace with hash 404108453, now seen corresponding path program 200 times [2021-06-05 03:53:14,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:14,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015352639] [2021-06-05 03:53:14,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:14,489 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:14,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:14,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015352639] [2021-06-05 03:53:14,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015352639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:14,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057345491] [2021-06-05 03:53:14,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:14,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:14,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:14,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:14,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:14,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057345491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:14,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:14,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 03:53:14,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74013935] [2021-06-05 03:53:14,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:14,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:14,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:14,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:14,594 INFO L87 Difference]: Start difference. First operand 2823 states and 8782 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:15,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:15,116 INFO L93 Difference]: Finished difference Result 4077 states and 11861 transitions. [2021-06-05 03:53:15,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 03:53:15,116 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:15,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:15,121 INFO L225 Difference]: With dead ends: 4077 [2021-06-05 03:53:15,121 INFO L226 Difference]: Without dead ends: 4071 [2021-06-05 03:53:15,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 428.2ms TimeCoverageRelationStatistics Valid=851, Invalid=2571, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 03:53:15,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2021-06-05 03:53:15,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 2645. [2021-06-05 03:53:15,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 3.0726172465960664) internal successors, (8124), 2644 states have internal predecessors, (8124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:15,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 8124 transitions. [2021-06-05 03:53:15,167 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 8124 transitions. Word has length 22 [2021-06-05 03:53:15,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:15,168 INFO L482 AbstractCegarLoop]: Abstraction has 2645 states and 8124 transitions. [2021-06-05 03:53:15,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:15,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 8124 transitions. [2021-06-05 03:53:15,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:15,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:15,170 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:15,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:15,371 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:15,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:15,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1527463093, now seen corresponding path program 201 times [2021-06-05 03:53:15,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:15,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515729012] [2021-06-05 03:53:15,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:15,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:15,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515729012] [2021-06-05 03:53:15,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515729012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:15,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74644836] [2021-06-05 03:53:15,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:15,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:53:15,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:15,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:15,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:15,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74644836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:15,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:15,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 03:53:15,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502648823] [2021-06-05 03:53:15,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:15,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:15,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:15,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:15,529 INFO L87 Difference]: Start difference. First operand 2645 states and 8124 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:16,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:16,049 INFO L93 Difference]: Finished difference Result 3589 states and 10404 transitions. [2021-06-05 03:53:16,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 03:53:16,050 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:16,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:16,054 INFO L225 Difference]: With dead ends: 3589 [2021-06-05 03:53:16,054 INFO L226 Difference]: Without dead ends: 3589 [2021-06-05 03:53:16,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 423.3ms TimeCoverageRelationStatistics Valid=1188, Invalid=2118, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 03:53:16,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3589 states. [2021-06-05 03:53:16,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3589 to 2809. [2021-06-05 03:53:16,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2809 states, 2808 states have (on average 3.094017094017094) internal successors, (8688), 2808 states have internal predecessors, (8688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:16,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 8688 transitions. [2021-06-05 03:53:16,093 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 8688 transitions. Word has length 22 [2021-06-05 03:53:16,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:16,093 INFO L482 AbstractCegarLoop]: Abstraction has 2809 states and 8688 transitions. [2021-06-05 03:53:16,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:16,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 8688 transitions. [2021-06-05 03:53:16,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:16,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:16,096 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:16,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:16,297 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:16,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:16,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1992054197, now seen corresponding path program 202 times [2021-06-05 03:53:16,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:16,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845781266] [2021-06-05 03:53:16,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:16,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:16,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845781266] [2021-06-05 03:53:16,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845781266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:16,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750495028] [2021-06-05 03:53:16,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:16,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:16,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:16,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:16,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:16,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750495028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:16,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:16,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 03:53:16,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864980731] [2021-06-05 03:53:16,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:16,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:16,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:16,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:16,456 INFO L87 Difference]: Start difference. First operand 2809 states and 8688 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:16,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:16,996 INFO L93 Difference]: Finished difference Result 3314 states and 9794 transitions. [2021-06-05 03:53:16,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 03:53:16,997 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:16,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:17,001 INFO L225 Difference]: With dead ends: 3314 [2021-06-05 03:53:17,001 INFO L226 Difference]: Without dead ends: 3310 [2021-06-05 03:53:17,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 447.4ms TimeCoverageRelationStatistics Valid=1484, Invalid=2806, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 03:53:17,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2021-06-05 03:53:17,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 2519. [2021-06-05 03:53:17,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2519 states, 2518 states have (on average 3.0532168387609215) internal successors, (7688), 2518 states have internal predecessors, (7688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:17,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 7688 transitions. [2021-06-05 03:53:17,034 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 7688 transitions. Word has length 22 [2021-06-05 03:53:17,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:17,034 INFO L482 AbstractCegarLoop]: Abstraction has 2519 states and 7688 transitions. [2021-06-05 03:53:17,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:17,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 7688 transitions. [2021-06-05 03:53:17,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:17,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:17,036 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:17,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:17,237 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:17,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:17,237 INFO L82 PathProgramCache]: Analyzing trace with hash 939338255, now seen corresponding path program 203 times [2021-06-05 03:53:17,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:17,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529101272] [2021-06-05 03:53:17,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:17,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:17,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529101272] [2021-06-05 03:53:17,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529101272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:17,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181172823] [2021-06-05 03:53:17,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:17,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:53:17,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:17,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:17,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:17,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181172823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:17,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:17,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 03:53:17,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813436691] [2021-06-05 03:53:17,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:17,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:17,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:17,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:17,386 INFO L87 Difference]: Start difference. First operand 2519 states and 7688 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:17,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:17,836 INFO L93 Difference]: Finished difference Result 3834 states and 11012 transitions. [2021-06-05 03:53:17,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 03:53:17,836 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:17,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:17,840 INFO L225 Difference]: With dead ends: 3834 [2021-06-05 03:53:17,840 INFO L226 Difference]: Without dead ends: 3825 [2021-06-05 03:53:17,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 373.9ms TimeCoverageRelationStatistics Valid=728, Invalid=2352, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 03:53:17,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3825 states. [2021-06-05 03:53:17,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3825 to 2573. [2021-06-05 03:53:17,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2572 states have (on average 3.0544323483670297) internal successors, (7856), 2572 states have internal predecessors, (7856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:17,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 7856 transitions. [2021-06-05 03:53:17,875 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 7856 transitions. Word has length 22 [2021-06-05 03:53:17,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:17,875 INFO L482 AbstractCegarLoop]: Abstraction has 2573 states and 7856 transitions. [2021-06-05 03:53:17,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:17,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 7856 transitions. [2021-06-05 03:53:17,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:17,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:17,878 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:18,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable384 [2021-06-05 03:53:18,078 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:18,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:18,079 INFO L82 PathProgramCache]: Analyzing trace with hash 351592933, now seen corresponding path program 204 times [2021-06-05 03:53:18,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:18,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397901053] [2021-06-05 03:53:18,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:18,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:18,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397901053] [2021-06-05 03:53:18,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397901053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:18,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671865758] [2021-06-05 03:53:18,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:18,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:53:18,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:18,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:18,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:18,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671865758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:18,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:18,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 03:53:18,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079844829] [2021-06-05 03:53:18,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:18,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:18,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:18,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:18,225 INFO L87 Difference]: Start difference. First operand 2573 states and 7856 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:18,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:18,629 INFO L93 Difference]: Finished difference Result 3887 states and 11211 transitions. [2021-06-05 03:53:18,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 03:53:18,629 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:18,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:18,634 INFO L225 Difference]: With dead ends: 3887 [2021-06-05 03:53:18,634 INFO L226 Difference]: Without dead ends: 3875 [2021-06-05 03:53:18,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 340.6ms TimeCoverageRelationStatistics Valid=630, Invalid=2126, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 03:53:18,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3875 states. [2021-06-05 03:53:18,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3875 to 2597. [2021-06-05 03:53:18,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2597 states, 2596 states have (on average 3.0543143297380584) internal successors, (7929), 2596 states have internal predecessors, (7929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:18,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 7929 transitions. [2021-06-05 03:53:18,672 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 7929 transitions. Word has length 22 [2021-06-05 03:53:18,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:18,672 INFO L482 AbstractCegarLoop]: Abstraction has 2597 states and 7929 transitions. [2021-06-05 03:53:18,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:18,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 7929 transitions. [2021-06-05 03:53:18,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:18,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:18,675 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:18,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:18,875 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:18,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:18,876 INFO L82 PathProgramCache]: Analyzing trace with hash -688642865, now seen corresponding path program 205 times [2021-06-05 03:53:18,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:18,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862657831] [2021-06-05 03:53:18,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:18,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:18,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862657831] [2021-06-05 03:53:18,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862657831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:18,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712480250] [2021-06-05 03:53:18,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:18,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:18,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:19,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712480250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:19,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:19,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 03:53:19,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017834878] [2021-06-05 03:53:19,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:19,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:19,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:19,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:19,025 INFO L87 Difference]: Start difference. First operand 2597 states and 7929 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:19,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:19,379 INFO L93 Difference]: Finished difference Result 3976 states and 11538 transitions. [2021-06-05 03:53:19,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 03:53:19,380 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:19,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:19,384 INFO L225 Difference]: With dead ends: 3976 [2021-06-05 03:53:19,384 INFO L226 Difference]: Without dead ends: 3961 [2021-06-05 03:53:19,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 326.9ms TimeCoverageRelationStatistics Valid=558, Invalid=1892, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 03:53:19,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3961 states. [2021-06-05 03:53:19,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3961 to 2615. [2021-06-05 03:53:19,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2614 states have (on average 3.0478194338179034) internal successors, (7967), 2614 states have internal predecessors, (7967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:19,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 7967 transitions. [2021-06-05 03:53:19,420 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 7967 transitions. Word has length 22 [2021-06-05 03:53:19,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:19,420 INFO L482 AbstractCegarLoop]: Abstraction has 2615 states and 7967 transitions. [2021-06-05 03:53:19,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:19,420 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 7967 transitions. [2021-06-05 03:53:19,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:19,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:19,422 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:19,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-05 03:53:19,623 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:19,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:19,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1423785765, now seen corresponding path program 206 times [2021-06-05 03:53:19,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:19,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284779065] [2021-06-05 03:53:19,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:19,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:19,668 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:19,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:19,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284779065] [2021-06-05 03:53:19,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284779065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:19,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942530520] [2021-06-05 03:53:19,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:19,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:19,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:19,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:19,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:19,768 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:19,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942530520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:19,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:19,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 03:53:19,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585456648] [2021-06-05 03:53:19,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:19,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:19,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:19,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:19,769 INFO L87 Difference]: Start difference. First operand 2615 states and 7967 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:20,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:20,014 INFO L93 Difference]: Finished difference Result 3613 states and 10545 transitions. [2021-06-05 03:53:20,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 03:53:20,014 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:20,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:20,018 INFO L225 Difference]: With dead ends: 3613 [2021-06-05 03:53:20,018 INFO L226 Difference]: Without dead ends: 3598 [2021-06-05 03:53:20,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 257.7ms TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 03:53:20,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2021-06-05 03:53:20,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 2615. [2021-06-05 03:53:20,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2614 states have (on average 3.0459066564651875) internal successors, (7962), 2614 states have internal predecessors, (7962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:20,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 7962 transitions. [2021-06-05 03:53:20,052 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 7962 transitions. Word has length 22 [2021-06-05 03:53:20,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:20,052 INFO L482 AbstractCegarLoop]: Abstraction has 2615 states and 7962 transitions. [2021-06-05 03:53:20,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:20,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 7962 transitions. [2021-06-05 03:53:20,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:20,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:20,054 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:20,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-05 03:53:20,255 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:20,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:20,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1262577295, now seen corresponding path program 207 times [2021-06-05 03:53:20,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:20,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023805559] [2021-06-05 03:53:20,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:20,294 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:20,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:20,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023805559] [2021-06-05 03:53:20,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023805559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:20,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650251243] [2021-06-05 03:53:20,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:20,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 03:53:20,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:20,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:20,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:20,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650251243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:20,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:20,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 03:53:20,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193671049] [2021-06-05 03:53:20,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:20,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:20,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:20,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:20,401 INFO L87 Difference]: Start difference. First operand 2615 states and 7962 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:20,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:20,896 INFO L93 Difference]: Finished difference Result 3520 states and 10061 transitions. [2021-06-05 03:53:20,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 03:53:20,896 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:20,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:20,899 INFO L225 Difference]: With dead ends: 3520 [2021-06-05 03:53:20,899 INFO L226 Difference]: Without dead ends: 3511 [2021-06-05 03:53:20,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 416.2ms TimeCoverageRelationStatistics Valid=1109, Invalid=1971, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 03:53:20,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-06-05 03:53:20,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2798. [2021-06-05 03:53:20,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2797 states have (on average 3.068287450840186) internal successors, (8582), 2797 states have internal predecessors, (8582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:20,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 8582 transitions. [2021-06-05 03:53:20,932 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 8582 transitions. Word has length 22 [2021-06-05 03:53:20,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:20,932 INFO L482 AbstractCegarLoop]: Abstraction has 2798 states and 8582 transitions. [2021-06-05 03:53:20,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:20,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 8582 transitions. [2021-06-05 03:53:20,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:20,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:20,935 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:21,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable388,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:21,135 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:21,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:21,136 INFO L82 PathProgramCache]: Analyzing trace with hash 797986191, now seen corresponding path program 208 times [2021-06-05 03:53:21,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:21,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157195439] [2021-06-05 03:53:21,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:21,175 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:21,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:21,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157195439] [2021-06-05 03:53:21,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157195439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:21,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927524566] [2021-06-05 03:53:21,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:21,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:21,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:21,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:21,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:21,288 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:21,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927524566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:21,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:21,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 03:53:21,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380228165] [2021-06-05 03:53:21,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:21,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:21,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:21,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:21,289 INFO L87 Difference]: Start difference. First operand 2798 states and 8582 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:21,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:21,857 INFO L93 Difference]: Finished difference Result 3291 states and 9479 transitions. [2021-06-05 03:53:21,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 03:53:21,857 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:21,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:21,860 INFO L225 Difference]: With dead ends: 3291 [2021-06-05 03:53:21,860 INFO L226 Difference]: Without dead ends: 3283 [2021-06-05 03:53:21,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 493.0ms TimeCoverageRelationStatistics Valid=1461, Invalid=2961, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 03:53:21,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-06-05 03:53:21,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2546. [2021-06-05 03:53:21,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 2545 states have (on average 3.0369351669941063) internal successors, (7729), 2545 states have internal predecessors, (7729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 7729 transitions. [2021-06-05 03:53:21,890 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 7729 transitions. Word has length 22 [2021-06-05 03:53:21,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:21,890 INFO L482 AbstractCegarLoop]: Abstraction has 2546 states and 7729 transitions. [2021-06-05 03:53:21,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:21,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 7729 transitions. [2021-06-05 03:53:21,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:21,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:21,892 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:22,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 03:53:22,093 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:22,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:22,093 INFO L82 PathProgramCache]: Analyzing trace with hash 764386963, now seen corresponding path program 209 times [2021-06-05 03:53:22,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:22,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407872934] [2021-06-05 03:53:22,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:22,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:22,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407872934] [2021-06-05 03:53:22,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407872934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:22,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224617729] [2021-06-05 03:53:22,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:22,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 03:53:22,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:22,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:22,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:22,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224617729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:22,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:22,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 03:53:22,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996856187] [2021-06-05 03:53:22,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:53:22,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:22,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:53:22,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:53:22,277 INFO L87 Difference]: Start difference. First operand 2546 states and 7729 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:22,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:22,839 INFO L93 Difference]: Finished difference Result 2975 states and 8569 transitions. [2021-06-05 03:53:22,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 03:53:22,840 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:22,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:22,843 INFO L225 Difference]: With dead ends: 2975 [2021-06-05 03:53:22,843 INFO L226 Difference]: Without dead ends: 2967 [2021-06-05 03:53:22,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 486.3ms TimeCoverageRelationStatistics Valid=1464, Invalid=3092, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 03:53:22,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2021-06-05 03:53:22,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 2564. [2021-06-05 03:53:22,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2564 states, 2563 states have (on average 3.037846273897776) internal successors, (7786), 2563 states have internal predecessors, (7786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:22,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2564 states to 2564 states and 7786 transitions. [2021-06-05 03:53:22,875 INFO L78 Accepts]: Start accepts. Automaton has 2564 states and 7786 transitions. Word has length 22 [2021-06-05 03:53:22,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:22,875 INFO L482 AbstractCegarLoop]: Abstraction has 2564 states and 7786 transitions. [2021-06-05 03:53:22,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:22,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2564 states and 7786 transitions. [2021-06-05 03:53:22,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:22,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:22,877 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:23,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:23,094 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:23,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:23,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1854483403, now seen corresponding path program 210 times [2021-06-05 03:53:23,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:23,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063604791] [2021-06-05 03:53:23,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:23,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:23,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:23,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063604791] [2021-06-05 03:53:23,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063604791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:23,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080954475] [2021-06-05 03:53:23,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:23,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:53:23,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:23,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:23,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:23,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080954475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:23,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:23,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 03:53:23,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969833236] [2021-06-05 03:53:23,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:23,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:23,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:23,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:23,284 INFO L87 Difference]: Start difference. First operand 2564 states and 7786 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:23,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:23,774 INFO L93 Difference]: Finished difference Result 3590 states and 10196 transitions. [2021-06-05 03:53:23,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 03:53:23,774 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:23,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:23,778 INFO L225 Difference]: With dead ends: 3590 [2021-06-05 03:53:23,778 INFO L226 Difference]: Without dead ends: 3575 [2021-06-05 03:53:23,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 415.0ms TimeCoverageRelationStatistics Valid=1038, Invalid=1824, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 03:53:23,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3575 states. [2021-06-05 03:53:23,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3575 to 2746. [2021-06-05 03:53:23,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2746 states, 2745 states have (on average 3.0612021857923497) internal successors, (8403), 2745 states have internal predecessors, (8403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:23,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2746 states to 2746 states and 8403 transitions. [2021-06-05 03:53:23,824 INFO L78 Accepts]: Start accepts. Automaton has 2746 states and 8403 transitions. Word has length 22 [2021-06-05 03:53:23,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:23,824 INFO L482 AbstractCegarLoop]: Abstraction has 2746 states and 8403 transitions. [2021-06-05 03:53:23,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:23,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2746 states and 8403 transitions. [2021-06-05 03:53:23,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:23,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:23,827 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:24,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:24,027 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:24,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:24,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1389892299, now seen corresponding path program 211 times [2021-06-05 03:53:24,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:24,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922261889] [2021-06-05 03:53:24,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:24,067 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:24,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:24,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922261889] [2021-06-05 03:53:24,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922261889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:24,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797742916] [2021-06-05 03:53:24,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:24,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:24,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:24,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:24,190 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:24,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797742916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:24,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:24,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 03:53:24,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505540436] [2021-06-05 03:53:24,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:24,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:24,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:24,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:24,191 INFO L87 Difference]: Start difference. First operand 2746 states and 8403 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:24,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:24,786 INFO L93 Difference]: Finished difference Result 3290 states and 9440 transitions. [2021-06-05 03:53:24,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 03:53:24,786 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:24,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:24,790 INFO L225 Difference]: With dead ends: 3290 [2021-06-05 03:53:24,790 INFO L226 Difference]: Without dead ends: 3284 [2021-06-05 03:53:24,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 527.9ms TimeCoverageRelationStatistics Valid=1537, Invalid=3293, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 03:53:24,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3284 states. [2021-06-05 03:53:24,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3284 to 2630. [2021-06-05 03:53:24,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 2629 states have (on average 3.0441232407759604) internal successors, (8003), 2629 states have internal predecessors, (8003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:24,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 8003 transitions. [2021-06-05 03:53:24,823 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 8003 transitions. Word has length 22 [2021-06-05 03:53:24,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:24,824 INFO L482 AbstractCegarLoop]: Abstraction has 2630 states and 8003 transitions. [2021-06-05 03:53:24,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:24,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 8003 transitions. [2021-06-05 03:53:24,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:24,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:24,826 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:25,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:25,027 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:25,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:25,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1356293071, now seen corresponding path program 212 times [2021-06-05 03:53:25,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:25,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119576511] [2021-06-05 03:53:25,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:25,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:25,078 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:25,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:25,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119576511] [2021-06-05 03:53:25,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119576511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:25,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679456658] [2021-06-05 03:53:25,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:25,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:25,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:25,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:25,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:25,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679456658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:25,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:25,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 03:53:25,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918433267] [2021-06-05 03:53:25,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:53:25,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:25,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:53:25,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:53:25,202 INFO L87 Difference]: Start difference. First operand 2630 states and 8003 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:25,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:25,790 INFO L93 Difference]: Finished difference Result 3240 states and 9276 transitions. [2021-06-05 03:53:25,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 03:53:25,790 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:25,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:25,793 INFO L225 Difference]: With dead ends: 3240 [2021-06-05 03:53:25,793 INFO L226 Difference]: Without dead ends: 3228 [2021-06-05 03:53:25,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 527.1ms TimeCoverageRelationStatistics Valid=1436, Invalid=3256, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 03:53:25,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2021-06-05 03:53:25,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2594. [2021-06-05 03:53:25,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2593 states have (on average 3.048206710374084) internal successors, (7904), 2593 states have internal predecessors, (7904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:25,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 7904 transitions. [2021-06-05 03:53:25,827 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 7904 transitions. Word has length 22 [2021-06-05 03:53:25,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:25,827 INFO L482 AbstractCegarLoop]: Abstraction has 2594 states and 7904 transitions. [2021-06-05 03:53:25,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:25,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 7904 transitions. [2021-06-05 03:53:25,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:25,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:25,829 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:26,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:26,030 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:26,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:26,031 INFO L82 PathProgramCache]: Analyzing trace with hash 314717003, now seen corresponding path program 213 times [2021-06-05 03:53:26,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:26,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350831194] [2021-06-05 03:53:26,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:26,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:26,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350831194] [2021-06-05 03:53:26,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350831194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:26,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317002029] [2021-06-05 03:53:26,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:26,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:53:26,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:26,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:26,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:26,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317002029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:26,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:26,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 03:53:26,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517807402] [2021-06-05 03:53:26,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:53:26,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:26,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:53:26,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:53:26,199 INFO L87 Difference]: Start difference. First operand 2594 states and 7904 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:26,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:26,740 INFO L93 Difference]: Finished difference Result 3083 states and 8911 transitions. [2021-06-05 03:53:26,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 03:53:26,740 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:26,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:26,743 INFO L225 Difference]: With dead ends: 3083 [2021-06-05 03:53:26,743 INFO L226 Difference]: Without dead ends: 3071 [2021-06-05 03:53:26,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 488.3ms TimeCoverageRelationStatistics Valid=1406, Invalid=3286, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 03:53:26,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2021-06-05 03:53:26,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 2614. [2021-06-05 03:53:26,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2614 states, 2613 states have (on average 3.050133945656334) internal successors, (7970), 2613 states have internal predecessors, (7970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:26,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2614 states to 2614 states and 7970 transitions. [2021-06-05 03:53:26,776 INFO L78 Accepts]: Start accepts. Automaton has 2614 states and 7970 transitions. Word has length 22 [2021-06-05 03:53:26,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:26,777 INFO L482 AbstractCegarLoop]: Abstraction has 2614 states and 7970 transitions. [2021-06-05 03:53:26,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:26,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2614 states and 7970 transitions. [2021-06-05 03:53:26,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:26,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:26,779 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:26,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:26,980 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:26,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:26,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1271263729, now seen corresponding path program 214 times [2021-06-05 03:53:26,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:26,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153325670] [2021-06-05 03:53:26,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:27,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:27,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153325670] [2021-06-05 03:53:27,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153325670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:27,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752441224] [2021-06-05 03:53:27,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:27,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:27,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:27,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:27,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:27,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752441224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:27,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:27,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 03:53:27,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877207892] [2021-06-05 03:53:27,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:27,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:27,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:27,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:27,149 INFO L87 Difference]: Start difference. First operand 2614 states and 7970 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:27,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:27,603 INFO L93 Difference]: Finished difference Result 3813 states and 10862 transitions. [2021-06-05 03:53:27,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 03:53:27,603 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:27,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:27,607 INFO L225 Difference]: With dead ends: 3813 [2021-06-05 03:53:27,607 INFO L226 Difference]: Without dead ends: 3801 [2021-06-05 03:53:27,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 376.7ms TimeCoverageRelationStatistics Valid=966, Invalid=1686, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 03:53:27,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2021-06-05 03:53:27,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 2922. [2021-06-05 03:53:27,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2922 states, 2921 states have (on average 3.0708661417322833) internal successors, (8970), 2921 states have internal predecessors, (8970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:27,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 8970 transitions. [2021-06-05 03:53:27,647 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 8970 transitions. Word has length 22 [2021-06-05 03:53:27,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:27,648 INFO L482 AbstractCegarLoop]: Abstraction has 2922 states and 8970 transitions. [2021-06-05 03:53:27,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:27,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 8970 transitions. [2021-06-05 03:53:27,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:27,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:27,651 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:27,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:27,851 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:27,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:27,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1735854833, now seen corresponding path program 215 times [2021-06-05 03:53:27,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:27,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257545277] [2021-06-05 03:53:27,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:27,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:27,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257545277] [2021-06-05 03:53:27,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257545277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:27,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143147266] [2021-06-05 03:53:27,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:27,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:53:27,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:27,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:27,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:27,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143147266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:27,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:27,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 03:53:27,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106902679] [2021-06-05 03:53:27,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:27,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:27,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:27,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:27,997 INFO L87 Difference]: Start difference. First operand 2922 states and 8970 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:28,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:28,652 INFO L93 Difference]: Finished difference Result 3570 states and 10279 transitions. [2021-06-05 03:53:28,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 03:53:28,652 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:28,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:28,655 INFO L225 Difference]: With dead ends: 3570 [2021-06-05 03:53:28,655 INFO L226 Difference]: Without dead ends: 3564 [2021-06-05 03:53:28,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 588.3ms TimeCoverageRelationStatistics Valid=1706, Invalid=3844, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 03:53:28,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-06-05 03:53:28,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2830. [2021-06-05 03:53:28,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2830 states, 2829 states have (on average 3.0572640509013786) internal successors, (8649), 2829 states have internal predecessors, (8649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:28,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2830 states to 2830 states and 8649 transitions. [2021-06-05 03:53:28,687 INFO L78 Accepts]: Start accepts. Automaton has 2830 states and 8649 transitions. Word has length 22 [2021-06-05 03:53:28,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:28,687 INFO L482 AbstractCegarLoop]: Abstraction has 2830 states and 8649 transitions. [2021-06-05 03:53:28,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:28,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2830 states and 8649 transitions. [2021-06-05 03:53:28,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:28,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:28,689 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:28,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable396 [2021-06-05 03:53:28,890 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:28,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:28,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1769454061, now seen corresponding path program 216 times [2021-06-05 03:53:28,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:28,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251417665] [2021-06-05 03:53:28,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:28,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:28,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251417665] [2021-06-05 03:53:28,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251417665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:28,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114098266] [2021-06-05 03:53:28,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:28,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:53:28,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:28,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:28,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:29,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114098266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:29,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:29,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 03:53:29,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523901074] [2021-06-05 03:53:29,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:53:29,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:29,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:53:29,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:53:29,039 INFO L87 Difference]: Start difference. First operand 2830 states and 8649 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:29,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:29,658 INFO L93 Difference]: Finished difference Result 3572 states and 10299 transitions. [2021-06-05 03:53:29,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 03:53:29,658 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:29,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:29,662 INFO L225 Difference]: With dead ends: 3572 [2021-06-05 03:53:29,662 INFO L226 Difference]: Without dead ends: 3564 [2021-06-05 03:53:29,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 539.3ms TimeCoverageRelationStatistics Valid=1503, Invalid=3609, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 03:53:29,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-06-05 03:53:29,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2871. [2021-06-05 03:53:29,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2871 states, 2870 states have (on average 3.0609756097560976) internal successors, (8785), 2870 states have internal predecessors, (8785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:29,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2871 states to 2871 states and 8785 transitions. [2021-06-05 03:53:29,699 INFO L78 Accepts]: Start accepts. Automaton has 2871 states and 8785 transitions. Word has length 22 [2021-06-05 03:53:29,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:29,699 INFO L482 AbstractCegarLoop]: Abstraction has 2871 states and 8785 transitions. [2021-06-05 03:53:29,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:29,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2871 states and 8785 transitions. [2021-06-05 03:53:29,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:29,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:29,701 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:29,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-06-05 03:53:29,902 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:29,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:29,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1483937167, now seen corresponding path program 217 times [2021-06-05 03:53:29,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:29,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983329074] [2021-06-05 03:53:29,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:29,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:29,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983329074] [2021-06-05 03:53:29,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983329074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:29,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132563603] [2021-06-05 03:53:29,955 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:29,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:29,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:30,091 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:30,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132563603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:30,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:30,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 03:53:30,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930008696] [2021-06-05 03:53:30,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:53:30,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:30,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:53:30,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:53:30,092 INFO L87 Difference]: Start difference. First operand 2871 states and 8785 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:30,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:30,695 INFO L93 Difference]: Finished difference Result 3644 states and 10545 transitions. [2021-06-05 03:53:30,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 03:53:30,695 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:30,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:30,699 INFO L225 Difference]: With dead ends: 3644 [2021-06-05 03:53:30,700 INFO L226 Difference]: Without dead ends: 3632 [2021-06-05 03:53:30,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 547.3ms TimeCoverageRelationStatistics Valid=1373, Invalid=3457, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 03:53:30,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3632 states. [2021-06-05 03:53:30,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3632 to 2921. [2021-06-05 03:53:30,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2921 states, 2920 states have (on average 3.0705479452054796) internal successors, (8966), 2920 states have internal predecessors, (8966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:30,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2921 states to 2921 states and 8966 transitions. [2021-06-05 03:53:30,738 INFO L78 Accepts]: Start accepts. Automaton has 2921 states and 8966 transitions. Word has length 22 [2021-06-05 03:53:30,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:30,739 INFO L482 AbstractCegarLoop]: Abstraction has 2921 states and 8966 transitions. [2021-06-05 03:53:30,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:30,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2921 states and 8966 transitions. [2021-06-05 03:53:30,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:30,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:30,742 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:30,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable398,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:30,942 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:30,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:30,943 INFO L82 PathProgramCache]: Analyzing trace with hash -740149869, now seen corresponding path program 218 times [2021-06-05 03:53:30,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:30,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350015406] [2021-06-05 03:53:30,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:30,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:30,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350015406] [2021-06-05 03:53:30,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350015406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:30,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703274463] [2021-06-05 03:53:30,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:31,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:31,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:31,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:31,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:31,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703274463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:31,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:31,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 03:53:31,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881257860] [2021-06-05 03:53:31,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:53:31,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:31,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:53:31,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:53:31,120 INFO L87 Difference]: Start difference. First operand 2921 states and 8966 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:31,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:31,632 INFO L93 Difference]: Finished difference Result 3521 states and 10275 transitions. [2021-06-05 03:53:31,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 03:53:31,633 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:31,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:31,636 INFO L225 Difference]: With dead ends: 3521 [2021-06-05 03:53:31,636 INFO L226 Difference]: Without dead ends: 3505 [2021-06-05 03:53:31,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 488.6ms TimeCoverageRelationStatistics Valid=1314, Invalid=3378, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 03:53:31,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3505 states. [2021-06-05 03:53:31,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3505 to 2952. [2021-06-05 03:53:31,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2952 states, 2951 states have (on average 3.0701457133175194) internal successors, (9060), 2951 states have internal predecessors, (9060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:31,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 9060 transitions. [2021-06-05 03:53:31,669 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 9060 transitions. Word has length 22 [2021-06-05 03:53:31,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:31,669 INFO L482 AbstractCegarLoop]: Abstraction has 2952 states and 9060 transitions. [2021-06-05 03:53:31,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:31,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 9060 transitions. [2021-06-05 03:53:31,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:31,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:31,672 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:31,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 03:53:31,872 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:31,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:31,873 INFO L82 PathProgramCache]: Analyzing trace with hash 614822987, now seen corresponding path program 219 times [2021-06-05 03:53:31,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:31,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704787355] [2021-06-05 03:53:31,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:31,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:31,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704787355] [2021-06-05 03:53:31,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704787355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:31,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060660203] [2021-06-05 03:53:31,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:31,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:53:31,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:31,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:31,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:32,018 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:32,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060660203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:32,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:32,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-06-05 03:53:32,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932463308] [2021-06-05 03:53:32,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:32,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:32,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:32,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:32,019 INFO L87 Difference]: Start difference. First operand 2952 states and 9060 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:32,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:32,484 INFO L93 Difference]: Finished difference Result 4650 states and 13519 transitions. [2021-06-05 03:53:32,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 03:53:32,484 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:32,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:32,490 INFO L225 Difference]: With dead ends: 4650 [2021-06-05 03:53:32,490 INFO L226 Difference]: Without dead ends: 4641 [2021-06-05 03:53:32,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 378.8ms TimeCoverageRelationStatistics Valid=950, Invalid=1702, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 03:53:32,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2021-06-05 03:53:32,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 3535. [2021-06-05 03:53:32,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3534 states have (on average 3.116581777023203) internal successors, (11014), 3534 states have internal predecessors, (11014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:32,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 11014 transitions. [2021-06-05 03:53:32,542 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 11014 transitions. Word has length 22 [2021-06-05 03:53:32,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:32,542 INFO L482 AbstractCegarLoop]: Abstraction has 3535 states and 11014 transitions. [2021-06-05 03:53:32,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:32,542 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 11014 transitions. [2021-06-05 03:53:32,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:32,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:32,546 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:32,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 03:53:32,747 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:32,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:32,747 INFO L82 PathProgramCache]: Analyzing trace with hash 150231883, now seen corresponding path program 220 times [2021-06-05 03:53:32,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:32,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797133203] [2021-06-05 03:53:32,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:32,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:32,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797133203] [2021-06-05 03:53:32,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797133203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:32,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916878758] [2021-06-05 03:53:32,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:32,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:32,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:32,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:32,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:32,915 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:32,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916878758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:32,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:32,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-06-05 03:53:32,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278934610] [2021-06-05 03:53:32,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:32,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:32,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:32,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:32,916 INFO L87 Difference]: Start difference. First operand 3535 states and 11014 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:33,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:33,727 INFO L93 Difference]: Finished difference Result 4324 states and 12650 transitions. [2021-06-05 03:53:33,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 03:53:33,727 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:33,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:33,732 INFO L225 Difference]: With dead ends: 4324 [2021-06-05 03:53:33,732 INFO L226 Difference]: Without dead ends: 4320 [2021-06-05 03:53:33,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2436 ImplicationChecksByTransitivity, 699.0ms TimeCoverageRelationStatistics Valid=1939, Invalid=4703, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 03:53:33,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4320 states. [2021-06-05 03:53:33,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4320 to 3452. [2021-06-05 03:53:33,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3452 states, 3451 states have (on average 3.1048971312662994) internal successors, (10715), 3451 states have internal predecessors, (10715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:33,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3452 states to 3452 states and 10715 transitions. [2021-06-05 03:53:33,780 INFO L78 Accepts]: Start accepts. Automaton has 3452 states and 10715 transitions. Word has length 22 [2021-06-05 03:53:33,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:33,780 INFO L482 AbstractCegarLoop]: Abstraction has 3452 states and 10715 transitions. [2021-06-05 03:53:33,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:33,780 INFO L276 IsEmpty]: Start isEmpty. Operand 3452 states and 10715 transitions. [2021-06-05 03:53:33,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:33,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:33,784 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:33,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-05 03:53:33,984 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:33,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:33,984 INFO L82 PathProgramCache]: Analyzing trace with hash 116632655, now seen corresponding path program 221 times [2021-06-05 03:53:33,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:33,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348428552] [2021-06-05 03:53:33,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:34,016 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:34,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:34,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348428552] [2021-06-05 03:53:34,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348428552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:34,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246408163] [2021-06-05 03:53:34,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:34,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:53:34,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:34,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:34,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:34,133 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:34,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246408163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:34,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:34,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 03:53:34,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94885500] [2021-06-05 03:53:34,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:53:34,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:34,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:53:34,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:53:34,134 INFO L87 Difference]: Start difference. First operand 3452 states and 10715 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:34,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:34,830 INFO L93 Difference]: Finished difference Result 4399 states and 12968 transitions. [2021-06-05 03:53:34,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 03:53:34,830 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:34,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:34,834 INFO L225 Difference]: With dead ends: 4399 [2021-06-05 03:53:34,834 INFO L226 Difference]: Without dead ends: 4391 [2021-06-05 03:53:34,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2068 ImplicationChecksByTransitivity, 604.5ms TimeCoverageRelationStatistics Valid=1649, Invalid=4203, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 03:53:34,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4391 states. [2021-06-05 03:53:34,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4391 to 3540. [2021-06-05 03:53:34,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3540 states, 3539 states have (on average 3.1150042384854477) internal successors, (11024), 3539 states have internal predecessors, (11024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:34,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 11024 transitions. [2021-06-05 03:53:34,877 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 11024 transitions. Word has length 22 [2021-06-05 03:53:34,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:34,877 INFO L482 AbstractCegarLoop]: Abstraction has 3540 states and 11024 transitions. [2021-06-05 03:53:34,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:34,877 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 11024 transitions. [2021-06-05 03:53:34,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:34,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:34,880 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:35,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:35,081 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:35,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:35,081 INFO L82 PathProgramCache]: Analyzing trace with hash -924943413, now seen corresponding path program 222 times [2021-06-05 03:53:35,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:35,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361142066] [2021-06-05 03:53:35,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:35,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:35,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361142066] [2021-06-05 03:53:35,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361142066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:35,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126593259] [2021-06-05 03:53:35,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:35,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:53:35,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:35,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:35,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:35,252 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:35,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126593259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:35,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:35,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-05 03:53:35,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692720655] [2021-06-05 03:53:35,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:53:35,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:35,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:53:35,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:53:35,256 INFO L87 Difference]: Start difference. First operand 3540 states and 11024 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:35,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:35,898 INFO L93 Difference]: Finished difference Result 4554 states and 13499 transitions. [2021-06-05 03:53:35,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 03:53:35,898 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:35,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:35,903 INFO L225 Difference]: With dead ends: 4554 [2021-06-05 03:53:35,903 INFO L226 Difference]: Without dead ends: 4542 [2021-06-05 03:53:35,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 572.5ms TimeCoverageRelationStatistics Valid=1425, Invalid=3831, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 03:53:35,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4542 states. [2021-06-05 03:53:35,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4542 to 3796. [2021-06-05 03:53:35,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 3.129907773386034) internal successors, (11878), 3795 states have internal predecessors, (11878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:35,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 11878 transitions. [2021-06-05 03:53:35,956 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 11878 transitions. Word has length 22 [2021-06-05 03:53:35,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:35,956 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 11878 transitions. [2021-06-05 03:53:35,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:35,956 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 11878 transitions. [2021-06-05 03:53:35,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:35,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:35,960 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:36,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-05 03:53:36,161 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:36,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:36,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1145936847, now seen corresponding path program 223 times [2021-06-05 03:53:36,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:36,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261749695] [2021-06-05 03:53:36,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:36,205 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:36,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:36,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261749695] [2021-06-05 03:53:36,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261749695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:36,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136317325] [2021-06-05 03:53:36,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:36,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:36,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:36,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:36,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136317325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:36,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:36,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 03:53:36,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224416886] [2021-06-05 03:53:36,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:53:36,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:36,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:53:36,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:53:36,334 INFO L87 Difference]: Start difference. First operand 3796 states and 11878 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:36,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:36,938 INFO L93 Difference]: Finished difference Result 4840 states and 14458 transitions. [2021-06-05 03:53:36,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 03:53:36,940 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:36,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:36,947 INFO L225 Difference]: With dead ends: 4840 [2021-06-05 03:53:36,947 INFO L226 Difference]: Without dead ends: 4824 [2021-06-05 03:53:36,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1567 ImplicationChecksByTransitivity, 534.3ms TimeCoverageRelationStatistics Valid=1272, Invalid=3558, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 03:53:36,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4824 states. [2021-06-05 03:53:37,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4824 to 4073. [2021-06-05 03:53:37,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4073 states, 4072 states have (on average 3.143909626719057) internal successors, (12802), 4072 states have internal predecessors, (12802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:37,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4073 states to 4073 states and 12802 transitions. [2021-06-05 03:53:37,018 INFO L78 Accepts]: Start accepts. Automaton has 4073 states and 12802 transitions. Word has length 22 [2021-06-05 03:53:37,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:37,018 INFO L482 AbstractCegarLoop]: Abstraction has 4073 states and 12802 transitions. [2021-06-05 03:53:37,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:37,018 INFO L276 IsEmpty]: Start isEmpty. Operand 4073 states and 12802 transitions. [2021-06-05 03:53:37,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:37,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:37,023 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:37,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-05 03:53:37,225 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:37,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:37,225 INFO L82 PathProgramCache]: Analyzing trace with hash 918715467, now seen corresponding path program 224 times [2021-06-05 03:53:37,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:37,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192843410] [2021-06-05 03:53:37,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:37,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:37,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:37,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192843410] [2021-06-05 03:53:37,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192843410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:37,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338447446] [2021-06-05 03:53:37,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:37,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:37,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:37,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:37,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:37,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338447446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:37,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:37,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 03:53:37,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56899442] [2021-06-05 03:53:37,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:53:37,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:37,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:53:37,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:53:37,479 INFO L87 Difference]: Start difference. First operand 4073 states and 12802 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:38,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:38,036 INFO L93 Difference]: Finished difference Result 4789 states and 14429 transitions. [2021-06-05 03:53:38,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 03:53:38,037 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:38,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:38,043 INFO L225 Difference]: With dead ends: 4789 [2021-06-05 03:53:38,043 INFO L226 Difference]: Without dead ends: 4769 [2021-06-05 03:53:38,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 561.1ms TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 03:53:38,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4769 states. [2021-06-05 03:53:38,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4769 to 4116. [2021-06-05 03:53:38,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4116 states, 4115 states have (on average 3.143377885783718) internal successors, (12935), 4115 states have internal predecessors, (12935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:38,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4116 states to 4116 states and 12935 transitions. [2021-06-05 03:53:38,105 INFO L78 Accepts]: Start accepts. Automaton has 4116 states and 12935 transitions. Word has length 22 [2021-06-05 03:53:38,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:38,105 INFO L482 AbstractCegarLoop]: Abstraction has 4116 states and 12935 transitions. [2021-06-05 03:53:38,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:38,105 INFO L276 IsEmpty]: Start isEmpty. Operand 4116 states and 12935 transitions. [2021-06-05 03:53:38,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:38,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:38,110 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:38,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:38,326 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:38,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:38,326 INFO L82 PathProgramCache]: Analyzing trace with hash 124564107, now seen corresponding path program 225 times [2021-06-05 03:53:38,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:38,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618536857] [2021-06-05 03:53:38,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:38,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:38,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618536857] [2021-06-05 03:53:38,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618536857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:38,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252080070] [2021-06-05 03:53:38,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:38,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:53:38,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:38,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:38,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:38,460 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:38,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252080070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:38,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:38,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-05 03:53:38,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212043438] [2021-06-05 03:53:38,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:53:38,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:38,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:53:38,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:53:38,461 INFO L87 Difference]: Start difference. First operand 4116 states and 12935 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:38,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:38,563 INFO L93 Difference]: Finished difference Result 4973 states and 15309 transitions. [2021-06-05 03:53:38,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:53:38,563 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:38,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:38,568 INFO L225 Difference]: With dead ends: 4973 [2021-06-05 03:53:38,568 INFO L226 Difference]: Without dead ends: 4973 [2021-06-05 03:53:38,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:53:38,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4973 states. [2021-06-05 03:53:38,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4973 to 4166. [2021-06-05 03:53:38,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4166 states, 4165 states have (on average 3.1423769507803123) internal successors, (13088), 4165 states have internal predecessors, (13088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:38,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4166 states to 4166 states and 13088 transitions. [2021-06-05 03:53:38,629 INFO L78 Accepts]: Start accepts. Automaton has 4166 states and 13088 transitions. Word has length 22 [2021-06-05 03:53:38,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:38,629 INFO L482 AbstractCegarLoop]: Abstraction has 4166 states and 13088 transitions. [2021-06-05 03:53:38,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:38,630 INFO L276 IsEmpty]: Start isEmpty. Operand 4166 states and 13088 transitions. [2021-06-05 03:53:38,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:38,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:38,634 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:38,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable406 [2021-06-05 03:53:38,834 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:38,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:38,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1397497815, now seen corresponding path program 226 times [2021-06-05 03:53:38,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:38,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871364563] [2021-06-05 03:53:38,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:38,880 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:38,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:38,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871364563] [2021-06-05 03:53:38,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871364563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:38,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332584171] [2021-06-05 03:53:38,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:38,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:38,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:38,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:38,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:38,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332584171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:38,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:38,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 03:53:38,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426227768] [2021-06-05 03:53:38,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:38,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:38,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:38,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:38,972 INFO L87 Difference]: Start difference. First operand 4166 states and 13088 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:39,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:39,141 INFO L93 Difference]: Finished difference Result 4567 states and 14102 transitions. [2021-06-05 03:53:39,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:53:39,141 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:39,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:39,146 INFO L225 Difference]: With dead ends: 4567 [2021-06-05 03:53:39,146 INFO L226 Difference]: Without dead ends: 4567 [2021-06-05 03:53:39,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 160.0ms TimeCoverageRelationStatistics Valid=310, Invalid=620, Unknown=0, NotChecked=0, Total=930 [2021-06-05 03:53:39,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4567 states. [2021-06-05 03:53:39,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4567 to 4183. [2021-06-05 03:53:39,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4183 states, 4182 states have (on average 3.141798182687709) internal successors, (13139), 4182 states have internal predecessors, (13139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:39,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 13139 transitions. [2021-06-05 03:53:39,198 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 13139 transitions. Word has length 22 [2021-06-05 03:53:39,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:39,198 INFO L482 AbstractCegarLoop]: Abstraction has 4183 states and 13139 transitions. [2021-06-05 03:53:39,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:39,198 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 13139 transitions. [2021-06-05 03:53:39,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:39,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:39,202 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:39,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:39,417 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:39,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:39,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1207526577, now seen corresponding path program 227 times [2021-06-05 03:53:39,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:39,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936874119] [2021-06-05 03:53:39,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:39,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:39,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936874119] [2021-06-05 03:53:39,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936874119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:39,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757156859] [2021-06-05 03:53:39,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:39,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:53:39,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:39,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:39,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:39,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757156859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:39,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:39,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 03:53:39,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393455222] [2021-06-05 03:53:39,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:39,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:39,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:39,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:39,565 INFO L87 Difference]: Start difference. First operand 4183 states and 13139 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:39,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:39,817 INFO L93 Difference]: Finished difference Result 4690 states and 14429 transitions. [2021-06-05 03:53:39,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 03:53:39,817 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:39,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:39,822 INFO L225 Difference]: With dead ends: 4690 [2021-06-05 03:53:39,822 INFO L226 Difference]: Without dead ends: 4690 [2021-06-05 03:53:39,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 206.8ms TimeCoverageRelationStatistics Valid=435, Invalid=897, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 03:53:39,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4690 states. [2021-06-05 03:53:39,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4690 to 4200. [2021-06-05 03:53:39,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4200 states, 4199 states have (on average 3.141224100976423) internal successors, (13190), 4199 states have internal predecessors, (13190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:39,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4200 states to 4200 states and 13190 transitions. [2021-06-05 03:53:39,868 INFO L78 Accepts]: Start accepts. Automaton has 4200 states and 13190 transitions. Word has length 22 [2021-06-05 03:53:39,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:39,868 INFO L482 AbstractCegarLoop]: Abstraction has 4200 states and 13190 transitions. [2021-06-05 03:53:39,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:39,868 INFO L276 IsEmpty]: Start isEmpty. Operand 4200 states and 13190 transitions. [2021-06-05 03:53:39,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:39,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:39,890 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:40,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-06-05 03:53:40,090 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:40,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:40,091 INFO L82 PathProgramCache]: Analyzing trace with hash -321728297, now seen corresponding path program 228 times [2021-06-05 03:53:40,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:40,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198204556] [2021-06-05 03:53:40,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:40,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:40,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:40,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198204556] [2021-06-05 03:53:40,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198204556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:40,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105354385] [2021-06-05 03:53:40,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:40,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:53:40,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:40,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:40,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:40,231 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:40,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105354385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:40,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:40,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 03:53:40,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915382362] [2021-06-05 03:53:40,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:40,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:40,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:40,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:40,232 INFO L87 Difference]: Start difference. First operand 4200 states and 13190 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:40,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:40,622 INFO L93 Difference]: Finished difference Result 4708 states and 14414 transitions. [2021-06-05 03:53:40,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 03:53:40,623 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:40,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:40,628 INFO L225 Difference]: With dead ends: 4708 [2021-06-05 03:53:40,628 INFO L226 Difference]: Without dead ends: 4708 [2021-06-05 03:53:40,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 316.8ms TimeCoverageRelationStatistics Valid=756, Invalid=1500, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 03:53:40,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4708 states. [2021-06-05 03:53:40,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4708 to 4231. [2021-06-05 03:53:40,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4231 states, 4230 states have (on average 3.1397163120567377) internal successors, (13281), 4230 states have internal predecessors, (13281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:40,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4231 states to 4231 states and 13281 transitions. [2021-06-05 03:53:40,678 INFO L78 Accepts]: Start accepts. Automaton has 4231 states and 13281 transitions. Word has length 22 [2021-06-05 03:53:40,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:40,678 INFO L482 AbstractCegarLoop]: Abstraction has 4231 states and 13281 transitions. [2021-06-05 03:53:40,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:40,678 INFO L276 IsEmpty]: Start isEmpty. Operand 4231 states and 13281 transitions. [2021-06-05 03:53:40,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:40,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:40,683 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:40,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:40,883 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:40,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:40,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1785055823, now seen corresponding path program 229 times [2021-06-05 03:53:40,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:40,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451740572] [2021-06-05 03:53:40,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:40,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:40,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451740572] [2021-06-05 03:53:40,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451740572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:40,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639820040] [2021-06-05 03:53:40,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:40,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:40,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:40,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:41,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639820040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:41,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:41,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 03:53:41,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496458860] [2021-06-05 03:53:41,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:41,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:41,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:41,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:41,043 INFO L87 Difference]: Start difference. First operand 4231 states and 13281 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:41,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:41,577 INFO L93 Difference]: Finished difference Result 4892 states and 14848 transitions. [2021-06-05 03:53:41,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 03:53:41,577 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:41,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:41,582 INFO L225 Difference]: With dead ends: 4892 [2021-06-05 03:53:41,583 INFO L226 Difference]: Without dead ends: 4892 [2021-06-05 03:53:41,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 405.7ms TimeCoverageRelationStatistics Valid=1057, Invalid=2023, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 03:53:41,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4892 states. [2021-06-05 03:53:41,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4892 to 4293. [2021-06-05 03:53:41,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4293 states, 4292 states have (on average 3.140959925442684) internal successors, (13481), 4292 states have internal predecessors, (13481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:41,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 13481 transitions. [2021-06-05 03:53:41,633 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 13481 transitions. Word has length 22 [2021-06-05 03:53:41,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:41,633 INFO L482 AbstractCegarLoop]: Abstraction has 4293 states and 13481 transitions. [2021-06-05 03:53:41,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:41,633 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 13481 transitions. [2021-06-05 03:53:41,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:41,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:41,638 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:41,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-05 03:53:41,838 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:41,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:41,838 INFO L82 PathProgramCache]: Analyzing trace with hash -363740713, now seen corresponding path program 230 times [2021-06-05 03:53:41,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:41,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979262995] [2021-06-05 03:53:41,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:41,883 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:41,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:41,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979262995] [2021-06-05 03:53:41,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979262995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:41,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876953501] [2021-06-05 03:53:41,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:41,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:41,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:41,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:41,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:41,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876953501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:41,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:41,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 03:53:41,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787930602] [2021-06-05 03:53:41,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:41,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:41,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:41,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:41,981 INFO L87 Difference]: Start difference. First operand 4293 states and 13481 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:42,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:42,495 INFO L93 Difference]: Finished difference Result 5068 states and 15287 transitions. [2021-06-05 03:53:42,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 03:53:42,495 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:42,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:42,501 INFO L225 Difference]: With dead ends: 5068 [2021-06-05 03:53:42,501 INFO L226 Difference]: Without dead ends: 5068 [2021-06-05 03:53:42,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 420.3ms TimeCoverageRelationStatistics Valid=1188, Invalid=2118, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 03:53:42,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5068 states. [2021-06-05 03:53:42,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5068 to 4271. [2021-06-05 03:53:42,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4271 states, 4270 states have (on average 3.1475409836065573) internal successors, (13440), 4270 states have internal predecessors, (13440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:42,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4271 states to 4271 states and 13440 transitions. [2021-06-05 03:53:42,556 INFO L78 Accepts]: Start accepts. Automaton has 4271 states and 13440 transitions. Word has length 22 [2021-06-05 03:53:42,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:42,557 INFO L482 AbstractCegarLoop]: Abstraction has 4271 states and 13440 transitions. [2021-06-05 03:53:42,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:42,557 INFO L276 IsEmpty]: Start isEmpty. Operand 4271 states and 13440 transitions. [2021-06-05 03:53:42,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:42,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:42,561 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:42,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 03:53:42,762 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:42,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:42,762 INFO L82 PathProgramCache]: Analyzing trace with hash 207714093, now seen corresponding path program 231 times [2021-06-05 03:53:42,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:42,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557615583] [2021-06-05 03:53:42,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:42,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:42,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:42,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557615583] [2021-06-05 03:53:42,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557615583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:42,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479329177] [2021-06-05 03:53:42,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:42,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:53:42,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:42,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:42,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:42,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479329177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:42,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:42,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 03:53:42,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264850687] [2021-06-05 03:53:42,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:42,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:42,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:42,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:42,928 INFO L87 Difference]: Start difference. First operand 4271 states and 13440 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:43,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:43,472 INFO L93 Difference]: Finished difference Result 4740 states and 14442 transitions. [2021-06-05 03:53:43,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 03:53:43,472 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:43,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:43,478 INFO L225 Difference]: With dead ends: 4740 [2021-06-05 03:53:43,478 INFO L226 Difference]: Without dead ends: 4734 [2021-06-05 03:53:43,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 450.9ms TimeCoverageRelationStatistics Valid=1484, Invalid=2806, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 03:53:43,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4734 states. [2021-06-05 03:53:43,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4734 to 4087. [2021-06-05 03:53:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4087 states, 4086 states have (on average 3.137542829172785) internal successors, (12820), 4086 states have internal predecessors, (12820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:43,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4087 states to 4087 states and 12820 transitions. [2021-06-05 03:53:43,528 INFO L78 Accepts]: Start accepts. Automaton has 4087 states and 12820 transitions. Word has length 22 [2021-06-05 03:53:43,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:43,528 INFO L482 AbstractCegarLoop]: Abstraction has 4087 states and 12820 transitions. [2021-06-05 03:53:43,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:43,529 INFO L276 IsEmpty]: Start isEmpty. Operand 4087 states and 12820 transitions. [2021-06-05 03:53:43,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:43,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:43,532 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:43,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-05 03:53:43,748 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:43,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:43,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1723857453, now seen corresponding path program 232 times [2021-06-05 03:53:43,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:43,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832327026] [2021-06-05 03:53:43,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:43,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:43,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832327026] [2021-06-05 03:53:43,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832327026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:43,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599238812] [2021-06-05 03:53:43,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:43,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:43,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:43,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:43,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:43,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599238812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:43,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:43,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 03:53:43,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500314334] [2021-06-05 03:53:43,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:43,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:43,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:43,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:43,896 INFO L87 Difference]: Start difference. First operand 4087 states and 12820 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:44,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:44,355 INFO L93 Difference]: Finished difference Result 5641 states and 17112 transitions. [2021-06-05 03:53:44,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 03:53:44,355 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:44,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:44,362 INFO L225 Difference]: With dead ends: 5641 [2021-06-05 03:53:44,362 INFO L226 Difference]: Without dead ends: 5629 [2021-06-05 03:53:44,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 370.8ms TimeCoverageRelationStatistics Valid=837, Invalid=1713, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 03:53:44,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5629 states. [2021-06-05 03:53:44,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5629 to 4769. [2021-06-05 03:53:44,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4769 states, 4768 states have (on average 3.1621224832214767) internal successors, (15077), 4768 states have internal predecessors, (15077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:44,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4769 states to 4769 states and 15077 transitions. [2021-06-05 03:53:44,426 INFO L78 Accepts]: Start accepts. Automaton has 4769 states and 15077 transitions. Word has length 22 [2021-06-05 03:53:44,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:44,426 INFO L482 AbstractCegarLoop]: Abstraction has 4769 states and 15077 transitions. [2021-06-05 03:53:44,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:44,426 INFO L276 IsEmpty]: Start isEmpty. Operand 4769 states and 15077 transitions. [2021-06-05 03:53:44,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:44,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:44,432 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:44,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:44,632 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:44,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:44,633 INFO L82 PathProgramCache]: Analyzing trace with hash 2106518739, now seen corresponding path program 233 times [2021-06-05 03:53:44,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:44,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904774815] [2021-06-05 03:53:44,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:44,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:44,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:44,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904774815] [2021-06-05 03:53:44,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904774815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:44,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331719208] [2021-06-05 03:53:44,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:44,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:53:44,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:44,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:44,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:44,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331719208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:44,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:44,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 03:53:44,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277493226] [2021-06-05 03:53:44,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:44,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:44,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:44,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:44,782 INFO L87 Difference]: Start difference. First operand 4769 states and 15077 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:45,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:45,291 INFO L93 Difference]: Finished difference Result 5550 states and 16864 transitions. [2021-06-05 03:53:45,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 03:53:45,292 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:45,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:45,297 INFO L225 Difference]: With dead ends: 5550 [2021-06-05 03:53:45,298 INFO L226 Difference]: Without dead ends: 5546 [2021-06-05 03:53:45,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 397.1ms TimeCoverageRelationStatistics Valid=851, Invalid=2571, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 03:53:45,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5546 states. [2021-06-05 03:53:45,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5546 to 4533. [2021-06-05 03:53:45,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4533 states, 4532 states have (on average 3.1385701676963813) internal successors, (14224), 4532 states have internal predecessors, (14224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:45,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4533 states to 4533 states and 14224 transitions. [2021-06-05 03:53:45,351 INFO L78 Accepts]: Start accepts. Automaton has 4533 states and 14224 transitions. Word has length 22 [2021-06-05 03:53:45,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:45,351 INFO L482 AbstractCegarLoop]: Abstraction has 4533 states and 14224 transitions. [2021-06-05 03:53:45,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:45,351 INFO L276 IsEmpty]: Start isEmpty. Operand 4533 states and 14224 transitions. [2021-06-05 03:53:45,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:45,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:45,355 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:45,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-05 03:53:45,556 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:45,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:45,556 INFO L82 PathProgramCache]: Analyzing trace with hash 2072919511, now seen corresponding path program 234 times [2021-06-05 03:53:45,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:45,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487730311] [2021-06-05 03:53:45,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:45,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:45,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487730311] [2021-06-05 03:53:45,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487730311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:45,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574621176] [2021-06-05 03:53:45,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:45,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:53:45,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:45,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:45,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:45,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574621176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:45,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:45,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 03:53:45,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219118123] [2021-06-05 03:53:45,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:45,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:45,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:45,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:45,744 INFO L87 Difference]: Start difference. First operand 4533 states and 14224 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:46,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:46,209 INFO L93 Difference]: Finished difference Result 5471 states and 16546 transitions. [2021-06-05 03:53:46,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 03:53:46,209 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:46,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:46,215 INFO L225 Difference]: With dead ends: 5471 [2021-06-05 03:53:46,215 INFO L226 Difference]: Without dead ends: 5463 [2021-06-05 03:53:46,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 407.1ms TimeCoverageRelationStatistics Valid=728, Invalid=2352, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 03:53:46,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5463 states. [2021-06-05 03:53:46,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5463 to 4659. [2021-06-05 03:53:46,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 3.1386861313868613) internal successors, (14620), 4658 states have internal predecessors, (14620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:46,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 14620 transitions. [2021-06-05 03:53:46,275 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 14620 transitions. Word has length 22 [2021-06-05 03:53:46,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:46,275 INFO L482 AbstractCegarLoop]: Abstraction has 4659 states and 14620 transitions. [2021-06-05 03:53:46,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:46,275 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 14620 transitions. [2021-06-05 03:53:46,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:46,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:46,280 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:46,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:46,480 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:46,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:46,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1031343443, now seen corresponding path program 235 times [2021-06-05 03:53:46,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:46,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611492016] [2021-06-05 03:53:46,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:46,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:46,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:46,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611492016] [2021-06-05 03:53:46,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611492016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:46,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620525358] [2021-06-05 03:53:46,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:46,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:46,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:46,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620525358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:46,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:46,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 03:53:46,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146888517] [2021-06-05 03:53:46,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:46,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:46,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:46,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:46,634 INFO L87 Difference]: Start difference. First operand 4659 states and 14620 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:47,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:47,077 INFO L93 Difference]: Finished difference Result 5651 states and 17165 transitions. [2021-06-05 03:53:47,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 03:53:47,077 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:47,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:47,083 INFO L225 Difference]: With dead ends: 5651 [2021-06-05 03:53:47,083 INFO L226 Difference]: Without dead ends: 5639 [2021-06-05 03:53:47,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 368.3ms TimeCoverageRelationStatistics Valid=630, Invalid=2126, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 03:53:47,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5639 states. [2021-06-05 03:53:47,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5639 to 4746. [2021-06-05 03:53:47,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4746 states, 4745 states have (on average 3.134668071654373) internal successors, (14874), 4745 states have internal predecessors, (14874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:47,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4746 states to 4746 states and 14874 transitions. [2021-06-05 03:53:47,153 INFO L78 Accepts]: Start accepts. Automaton has 4746 states and 14874 transitions. Word has length 22 [2021-06-05 03:53:47,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:47,153 INFO L482 AbstractCegarLoop]: Abstraction has 4746 states and 14874 transitions. [2021-06-05 03:53:47,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:47,153 INFO L276 IsEmpty]: Start isEmpty. Operand 4746 states and 14874 transitions. [2021-06-05 03:53:47,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:47,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:47,159 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:47,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:47,359 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:47,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:47,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1192743593, now seen corresponding path program 236 times [2021-06-05 03:53:47,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:47,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294147604] [2021-06-05 03:53:47,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:47,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:47,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294147604] [2021-06-05 03:53:47,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294147604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:47,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822564782] [2021-06-05 03:53:47,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:47,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:47,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:47,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:47,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:47,510 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:47,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822564782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:47,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:47,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 03:53:47,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441562622] [2021-06-05 03:53:47,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:47,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:47,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:47,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:47,510 INFO L87 Difference]: Start difference. First operand 4746 states and 14874 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:47,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:47,906 INFO L93 Difference]: Finished difference Result 5785 states and 17615 transitions. [2021-06-05 03:53:47,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 03:53:47,907 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:47,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:47,913 INFO L225 Difference]: With dead ends: 5785 [2021-06-05 03:53:47,913 INFO L226 Difference]: Without dead ends: 5769 [2021-06-05 03:53:47,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 335.2ms TimeCoverageRelationStatistics Valid=558, Invalid=1892, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 03:53:47,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5769 states. [2021-06-05 03:53:47,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5769 to 4762. [2021-06-05 03:53:47,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4762 states, 4761 states have (on average 3.131064902331443) internal successors, (14907), 4761 states have internal predecessors, (14907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 14907 transitions. [2021-06-05 03:53:47,974 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 14907 transitions. Word has length 22 [2021-06-05 03:53:47,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:47,974 INFO L482 AbstractCegarLoop]: Abstraction has 4762 states and 14907 transitions. [2021-06-05 03:53:47,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:47,974 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 14907 transitions. [2021-06-05 03:53:47,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:47,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:47,979 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:48,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable417 [2021-06-05 03:53:48,181 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:48,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:48,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1419964973, now seen corresponding path program 237 times [2021-06-05 03:53:48,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:48,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757637985] [2021-06-05 03:53:48,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:48,225 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:48,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:48,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757637985] [2021-06-05 03:53:48,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757637985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:48,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870906052] [2021-06-05 03:53:48,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:48,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:53:48,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:48,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:48,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:48,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870906052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:48,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:48,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 03:53:48,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247049331] [2021-06-05 03:53:48,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:48,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:48,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:48,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:48,329 INFO L87 Difference]: Start difference. First operand 4762 states and 14907 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:48,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:48,602 INFO L93 Difference]: Finished difference Result 5323 states and 16253 transitions. [2021-06-05 03:53:48,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 03:53:48,602 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:48,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:48,609 INFO L225 Difference]: With dead ends: 5323 [2021-06-05 03:53:48,609 INFO L226 Difference]: Without dead ends: 5313 [2021-06-05 03:53:48,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 276.4ms TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 03:53:48,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5313 states. [2021-06-05 03:53:48,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5313 to 4762. [2021-06-05 03:53:48,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4762 states, 4761 states have (on average 3.1300147027935306) internal successors, (14902), 4761 states have internal predecessors, (14902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:48,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 14902 transitions. [2021-06-05 03:53:48,673 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 14902 transitions. Word has length 22 [2021-06-05 03:53:48,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:48,673 INFO L482 AbstractCegarLoop]: Abstraction has 4762 states and 14902 transitions. [2021-06-05 03:53:48,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:48,673 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 14902 transitions. [2021-06-05 03:53:48,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:48,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:48,679 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:48,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:48,879 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:48,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:48,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1143175849, now seen corresponding path program 238 times [2021-06-05 03:53:48,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:48,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240903082] [2021-06-05 03:53:48,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:48,925 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:48,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:48,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240903082] [2021-06-05 03:53:48,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240903082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:48,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005165212] [2021-06-05 03:53:48,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:48,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:48,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:48,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:48,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:49,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005165212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:49,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:49,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-05 03:53:49,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583221340] [2021-06-05 03:53:49,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:53:49,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:49,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:53:49,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:53:49,020 INFO L87 Difference]: Start difference. First operand 4762 states and 14902 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:49,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:49,125 INFO L93 Difference]: Finished difference Result 5170 states and 15985 transitions. [2021-06-05 03:53:49,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:53:49,126 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:49,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:49,131 INFO L225 Difference]: With dead ends: 5170 [2021-06-05 03:53:49,132 INFO L226 Difference]: Without dead ends: 5158 [2021-06-05 03:53:49,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=213, Invalid=599, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:53:49,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5158 states. [2021-06-05 03:53:49,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5158 to 4762. [2021-06-05 03:53:49,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4762 states, 4761 states have (on average 3.1298046628859484) internal successors, (14901), 4761 states have internal predecessors, (14901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:49,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 14901 transitions. [2021-06-05 03:53:49,190 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 14901 transitions. Word has length 22 [2021-06-05 03:53:49,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:49,190 INFO L482 AbstractCegarLoop]: Abstraction has 4762 states and 14901 transitions. [2021-06-05 03:53:49,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:49,190 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 14901 transitions. [2021-06-05 03:53:49,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:49,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:49,195 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:49,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:49,396 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:49,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:49,396 INFO L82 PathProgramCache]: Analyzing trace with hash -2091230197, now seen corresponding path program 239 times [2021-06-05 03:53:49,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:49,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152416671] [2021-06-05 03:53:49,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:49,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:49,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152416671] [2021-06-05 03:53:49,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152416671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:49,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163510664] [2021-06-05 03:53:49,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:49,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:53:49,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:49,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:49,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:49,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163510664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:49,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:49,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 03:53:49,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204847257] [2021-06-05 03:53:49,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:53:49,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:49,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:53:49,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:53:49,558 INFO L87 Difference]: Start difference. First operand 4762 states and 14901 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:49,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:49,953 INFO L93 Difference]: Finished difference Result 5204 states and 15992 transitions. [2021-06-05 03:53:49,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 03:53:49,953 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:49,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:49,958 INFO L225 Difference]: With dead ends: 5204 [2021-06-05 03:53:49,959 INFO L226 Difference]: Without dead ends: 5204 [2021-06-05 03:53:49,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 336.4ms TimeCoverageRelationStatistics Valid=785, Invalid=1665, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 03:53:49,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5204 states. [2021-06-05 03:53:49,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5204 to 4777. [2021-06-05 03:53:50,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4777 states, 4776 states have (on average 3.129396984924623) internal successors, (14946), 4776 states have internal predecessors, (14946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:50,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4777 states to 4777 states and 14946 transitions. [2021-06-05 03:53:50,011 INFO L78 Accepts]: Start accepts. Automaton has 4777 states and 14946 transitions. Word has length 22 [2021-06-05 03:53:50,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:50,011 INFO L482 AbstractCegarLoop]: Abstraction has 4777 states and 14946 transitions. [2021-06-05 03:53:50,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:50,011 INFO L276 IsEmpty]: Start isEmpty. Operand 4777 states and 14946 transitions. [2021-06-05 03:53:50,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:50,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:50,016 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:50,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-05 03:53:50,216 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:50,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:50,237 INFO L82 PathProgramCache]: Analyzing trace with hash 447335179, now seen corresponding path program 240 times [2021-06-05 03:53:50,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:50,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894520654] [2021-06-05 03:53:50,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:50,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:50,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894520654] [2021-06-05 03:53:50,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894520654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:50,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133955221] [2021-06-05 03:53:50,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:50,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:53:50,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:50,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:50,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:50,397 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:50,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133955221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:50,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:50,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 03:53:50,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724747435] [2021-06-05 03:53:50,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:50,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:50,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:50,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:50,398 INFO L87 Difference]: Start difference. First operand 4777 states and 14946 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:50,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:50,757 INFO L93 Difference]: Finished difference Result 5391 states and 16437 transitions. [2021-06-05 03:53:50,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 03:53:50,757 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:50,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:50,763 INFO L225 Difference]: With dead ends: 5391 [2021-06-05 03:53:50,763 INFO L226 Difference]: Without dead ends: 5381 [2021-06-05 03:53:50,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 298.4ms TimeCoverageRelationStatistics Valid=600, Invalid=1292, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 03:53:50,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5381 states. [2021-06-05 03:53:50,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5381 to 4798. [2021-06-05 03:53:50,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4798 states, 4797 states have (on average 3.128413591828226) internal successors, (15007), 4797 states have internal predecessors, (15007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:50,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4798 states to 4798 states and 15007 transitions. [2021-06-05 03:53:50,823 INFO L78 Accepts]: Start accepts. Automaton has 4798 states and 15007 transitions. Word has length 22 [2021-06-05 03:53:50,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:50,823 INFO L482 AbstractCegarLoop]: Abstraction has 4798 states and 15007 transitions. [2021-06-05 03:53:50,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:50,823 INFO L276 IsEmpty]: Start isEmpty. Operand 4798 states and 15007 transitions. [2021-06-05 03:53:50,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:50,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:50,828 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:51,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-05 03:53:51,029 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:51,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:51,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1271890933, now seen corresponding path program 241 times [2021-06-05 03:53:51,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:51,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261692495] [2021-06-05 03:53:51,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:51,068 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:51,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:51,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261692495] [2021-06-05 03:53:51,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261692495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:51,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386291295] [2021-06-05 03:53:51,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:51,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:51,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:51,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386291295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:51,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:51,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 03:53:51,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732830058] [2021-06-05 03:53:51,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:51,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:51,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:51,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:51,168 INFO L87 Difference]: Start difference. First operand 4798 states and 15007 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:51,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:51,539 INFO L93 Difference]: Finished difference Result 5359 states and 16352 transitions. [2021-06-05 03:53:51,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 03:53:51,539 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:51,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:51,545 INFO L225 Difference]: With dead ends: 5359 [2021-06-05 03:53:51,545 INFO L226 Difference]: Without dead ends: 5349 [2021-06-05 03:53:51,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 285.6ms TimeCoverageRelationStatistics Valid=608, Invalid=1284, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 03:53:51,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5349 states. [2021-06-05 03:53:51,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5349 to 4815. [2021-06-05 03:53:51,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4815 states, 4814 states have (on average 3.1258828417116744) internal successors, (15048), 4814 states have internal predecessors, (15048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:51,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4815 states to 4815 states and 15048 transitions. [2021-06-05 03:53:51,605 INFO L78 Accepts]: Start accepts. Automaton has 4815 states and 15048 transitions. Word has length 22 [2021-06-05 03:53:51,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:51,605 INFO L482 AbstractCegarLoop]: Abstraction has 4815 states and 15048 transitions. [2021-06-05 03:53:51,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:51,605 INFO L276 IsEmpty]: Start isEmpty. Operand 4815 states and 15048 transitions. [2021-06-05 03:53:51,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:51,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:51,610 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:51,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 03:53:51,815 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:51,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:51,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1720691467, now seen corresponding path program 242 times [2021-06-05 03:53:51,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:51,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994589238] [2021-06-05 03:53:51,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:51,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:51,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994589238] [2021-06-05 03:53:51,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994589238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:51,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890193425] [2021-06-05 03:53:51,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:51,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:51,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:51,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:51,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:51,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890193425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:51,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:51,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 03:53:51,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641818210] [2021-06-05 03:53:51,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:51,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:51,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:51,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:51,983 INFO L87 Difference]: Start difference. First operand 4815 states and 15048 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:52,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:52,453 INFO L93 Difference]: Finished difference Result 5632 states and 17049 transitions. [2021-06-05 03:53:52,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 03:53:52,454 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:52,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:52,460 INFO L225 Difference]: With dead ends: 5632 [2021-06-05 03:53:52,460 INFO L226 Difference]: Without dead ends: 5628 [2021-06-05 03:53:52,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 388.0ms TimeCoverageRelationStatistics Valid=940, Invalid=1816, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 03:53:52,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5628 states. [2021-06-05 03:53:52,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5628 to 4825. [2021-06-05 03:53:52,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4825 states, 4824 states have (on average 3.1237562189054726) internal successors, (15069), 4824 states have internal predecessors, (15069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:52,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4825 states to 4825 states and 15069 transitions. [2021-06-05 03:53:52,527 INFO L78 Accepts]: Start accepts. Automaton has 4825 states and 15069 transitions. Word has length 22 [2021-06-05 03:53:52,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:52,527 INFO L482 AbstractCegarLoop]: Abstraction has 4825 states and 15069 transitions. [2021-06-05 03:53:52,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:52,527 INFO L276 IsEmpty]: Start isEmpty. Operand 4825 states and 15069 transitions. [2021-06-05 03:53:52,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:52,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:52,533 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:52,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:52,736 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:52,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:52,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1678679051, now seen corresponding path program 243 times [2021-06-05 03:53:52,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:52,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164806779] [2021-06-05 03:53:52,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:52,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:52,777 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:52,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:52,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164806779] [2021-06-05 03:53:52,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164806779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:52,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760065351] [2021-06-05 03:53:52,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:52,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 03:53:52,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:52,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:52,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:52,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760065351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:52,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:52,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 03:53:52,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552321923] [2021-06-05 03:53:52,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:52,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:52,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:52,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:52,895 INFO L87 Difference]: Start difference. First operand 4825 states and 15069 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:53,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:53,407 INFO L93 Difference]: Finished difference Result 5908 states and 17767 transitions. [2021-06-05 03:53:53,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 03:53:53,407 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:53,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:53,415 INFO L225 Difference]: With dead ends: 5908 [2021-06-05 03:53:53,415 INFO L226 Difference]: Without dead ends: 5908 [2021-06-05 03:53:53,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 422.3ms TimeCoverageRelationStatistics Valid=1109, Invalid=1971, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 03:53:53,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5908 states. [2021-06-05 03:53:53,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5908 to 4874. [2021-06-05 03:53:53,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4874 states, 4873 states have (on average 3.1329776318489637) internal successors, (15267), 4873 states have internal predecessors, (15267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:53,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4874 states to 4874 states and 15267 transitions. [2021-06-05 03:53:53,500 INFO L78 Accepts]: Start accepts. Automaton has 4874 states and 15267 transitions. Word has length 22 [2021-06-05 03:53:53,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:53,501 INFO L482 AbstractCegarLoop]: Abstraction has 4874 states and 15267 transitions. [2021-06-05 03:53:53,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:53,501 INFO L276 IsEmpty]: Start isEmpty. Operand 4874 states and 15267 transitions. [2021-06-05 03:53:53,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:53,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:53,506 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:53,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-06-05 03:53:53,707 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:53,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:53,707 INFO L82 PathProgramCache]: Analyzing trace with hash -2044833439, now seen corresponding path program 244 times [2021-06-05 03:53:53,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:53,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614977508] [2021-06-05 03:53:53,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:53,746 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:53,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:53,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614977508] [2021-06-05 03:53:53,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614977508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:53,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099177396] [2021-06-05 03:53:53,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:53,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:53,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:53,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:53,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:53,848 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:53,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099177396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:53,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:53,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 03:53:53,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919528042] [2021-06-05 03:53:53,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:53,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:53,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:53,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:53,849 INFO L87 Difference]: Start difference. First operand 4874 states and 15267 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:54,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:54,449 INFO L93 Difference]: Finished difference Result 5619 states and 16921 transitions. [2021-06-05 03:53:54,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 03:53:54,450 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:54,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:54,457 INFO L225 Difference]: With dead ends: 5619 [2021-06-05 03:53:54,457 INFO L226 Difference]: Without dead ends: 5607 [2021-06-05 03:53:54,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 497.8ms TimeCoverageRelationStatistics Valid=1461, Invalid=2961, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 03:53:54,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5607 states. [2021-06-05 03:53:54,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5607 to 4673. [2021-06-05 03:53:54,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4673 states, 4672 states have (on average 3.120291095890411) internal successors, (14578), 4672 states have internal predecessors, (14578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:54,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4673 states to 4673 states and 14578 transitions. [2021-06-05 03:53:54,526 INFO L78 Accepts]: Start accepts. Automaton has 4673 states and 14578 transitions. Word has length 22 [2021-06-05 03:53:54,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:54,526 INFO L482 AbstractCegarLoop]: Abstraction has 4673 states and 14578 transitions. [2021-06-05 03:53:54,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:54,526 INFO L276 IsEmpty]: Start isEmpty. Operand 4673 states and 14578 transitions. [2021-06-05 03:53:54,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:54,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:54,531 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:54,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:54,732 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:54,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:54,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1509603637, now seen corresponding path program 245 times [2021-06-05 03:53:54,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:54,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250491675] [2021-06-05 03:53:54,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:54,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:54,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250491675] [2021-06-05 03:53:54,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250491675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:54,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869865366] [2021-06-05 03:53:54,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:54,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 03:53:54,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:54,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:54,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:54,905 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:54,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869865366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:54,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:54,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 03:53:54,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070657735] [2021-06-05 03:53:54,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:53:54,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:54,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:53:54,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:53:54,906 INFO L87 Difference]: Start difference. First operand 4673 states and 14578 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:55,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:55,484 INFO L93 Difference]: Finished difference Result 5350 states and 16179 transitions. [2021-06-05 03:53:55,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 03:53:55,484 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:55,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:55,491 INFO L225 Difference]: With dead ends: 5350 [2021-06-05 03:53:55,491 INFO L226 Difference]: Without dead ends: 5338 [2021-06-05 03:53:55,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 493.7ms TimeCoverageRelationStatistics Valid=1464, Invalid=3092, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 03:53:55,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5338 states. [2021-06-05 03:53:55,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5338 to 4703. [2021-06-05 03:53:55,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4703 states, 4702 states have (on average 3.1207996597192684) internal successors, (14674), 4702 states have internal predecessors, (14674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:55,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 14674 transitions. [2021-06-05 03:53:55,558 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 14674 transitions. Word has length 22 [2021-06-05 03:53:55,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:55,558 INFO L482 AbstractCegarLoop]: Abstraction has 4703 states and 14674 transitions. [2021-06-05 03:53:55,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:55,559 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 14674 transitions. [2021-06-05 03:53:55,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:55,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:55,564 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:55,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-06-05 03:53:55,765 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:55,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:55,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1427351127, now seen corresponding path program 246 times [2021-06-05 03:53:55,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:55,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896721012] [2021-06-05 03:53:55,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:55,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:55,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896721012] [2021-06-05 03:53:55,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896721012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:55,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606011818] [2021-06-05 03:53:55,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:55,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:53:55,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:55,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:55,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:55,949 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:55,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606011818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:55,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:55,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 03:53:55,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928937778] [2021-06-05 03:53:55,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:53:55,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:55,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:53:55,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:53:55,950 INFO L87 Difference]: Start difference. First operand 4703 states and 14674 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:56,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:56,403 INFO L93 Difference]: Finished difference Result 5100 states and 15587 transitions. [2021-06-05 03:53:56,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 03:53:56,403 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:56,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:56,410 INFO L225 Difference]: With dead ends: 5100 [2021-06-05 03:53:56,410 INFO L226 Difference]: Without dead ends: 5100 [2021-06-05 03:53:56,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 397.7ms TimeCoverageRelationStatistics Valid=907, Invalid=2063, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 03:53:56,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5100 states. [2021-06-05 03:53:56,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5100 to 4687. [2021-06-05 03:53:56,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4687 states, 4686 states have (on average 3.120998719590269) internal successors, (14625), 4686 states have internal predecessors, (14625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:56,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 14625 transitions. [2021-06-05 03:53:56,478 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 14625 transitions. Word has length 22 [2021-06-05 03:53:56,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:56,479 INFO L482 AbstractCegarLoop]: Abstraction has 4687 states and 14625 transitions. [2021-06-05 03:53:56,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:56,479 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 14625 transitions. [2021-06-05 03:53:56,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:56,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:56,484 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:56,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable427 [2021-06-05 03:53:56,700 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:56,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:56,701 INFO L82 PathProgramCache]: Analyzing trace with hash 208442063, now seen corresponding path program 247 times [2021-06-05 03:53:56,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:56,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312198394] [2021-06-05 03:53:56,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:56,744 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:56,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:56,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312198394] [2021-06-05 03:53:56,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312198394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:56,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283820775] [2021-06-05 03:53:56,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:56,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:56,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:56,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:56,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283820775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:56,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:56,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 03:53:56,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245591846] [2021-06-05 03:53:56,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:53:56,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:56,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:53:56,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:53:56,854 INFO L87 Difference]: Start difference. First operand 4687 states and 14625 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:57,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:57,269 INFO L93 Difference]: Finished difference Result 5184 states and 15752 transitions. [2021-06-05 03:53:57,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 03:53:57,269 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:57,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:57,274 INFO L225 Difference]: With dead ends: 5184 [2021-06-05 03:53:57,274 INFO L226 Difference]: Without dead ends: 5174 [2021-06-05 03:53:57,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 335.6ms TimeCoverageRelationStatistics Valid=713, Invalid=1639, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 03:53:57,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5174 states. [2021-06-05 03:53:57,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5174 to 4685. [2021-06-05 03:53:57,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4685 states, 4684 states have (on average 3.1195559350982065) internal successors, (14612), 4684 states have internal predecessors, (14612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:57,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4685 states to 4685 states and 14612 transitions. [2021-06-05 03:53:57,329 INFO L78 Accepts]: Start accepts. Automaton has 4685 states and 14612 transitions. Word has length 22 [2021-06-05 03:53:57,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:57,329 INFO L482 AbstractCegarLoop]: Abstraction has 4685 states and 14612 transitions. [2021-06-05 03:53:57,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:57,330 INFO L276 IsEmpty]: Start isEmpty. Operand 4685 states and 14612 transitions. [2021-06-05 03:53:57,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:57,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:57,335 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:57,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:57,535 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:57,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:57,536 INFO L82 PathProgramCache]: Analyzing trace with hash -662161577, now seen corresponding path program 248 times [2021-06-05 03:53:57,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:57,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590177476] [2021-06-05 03:53:57,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:57,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:57,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:57,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590177476] [2021-06-05 03:53:57,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590177476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:57,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043791923] [2021-06-05 03:53:57,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:57,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:57,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:57,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:57,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:57,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043791923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:57,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:57,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 03:53:57,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613912766] [2021-06-05 03:53:57,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:57,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:57,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:57,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:57,677 INFO L87 Difference]: Start difference. First operand 4685 states and 14612 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:58,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:58,113 INFO L93 Difference]: Finished difference Result 5658 states and 17075 transitions. [2021-06-05 03:53:58,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 03:53:58,114 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:58,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:58,120 INFO L225 Difference]: With dead ends: 5658 [2021-06-05 03:53:58,120 INFO L226 Difference]: Without dead ends: 5652 [2021-06-05 03:53:58,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 338.8ms TimeCoverageRelationStatistics Valid=760, Invalid=1592, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 03:53:58,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5652 states. [2021-06-05 03:53:58,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5652 to 4809. [2021-06-05 03:53:58,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4809 states, 4808 states have (on average 3.117512479201331) internal successors, (14989), 4808 states have internal predecessors, (14989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4809 states to 4809 states and 14989 transitions. [2021-06-05 03:53:58,183 INFO L78 Accepts]: Start accepts. Automaton has 4809 states and 14989 transitions. Word has length 22 [2021-06-05 03:53:58,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:58,183 INFO L482 AbstractCegarLoop]: Abstraction has 4809 states and 14989 transitions. [2021-06-05 03:53:58,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:58,183 INFO L276 IsEmpty]: Start isEmpty. Operand 4809 states and 14989 transitions. [2021-06-05 03:53:58,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:58,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:58,188 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:58,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable429 [2021-06-05 03:53:58,389 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:58,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:58,389 INFO L82 PathProgramCache]: Analyzing trace with hash -274603569, now seen corresponding path program 249 times [2021-06-05 03:53:58,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:58,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67580255] [2021-06-05 03:53:58,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:58,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:58,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:58,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67580255] [2021-06-05 03:53:58,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67580255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:58,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054008326] [2021-06-05 03:53:58,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:58,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:53:58,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:58,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:58,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:58,537 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:58,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054008326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:58,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:58,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 03:53:58,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714975700] [2021-06-05 03:53:58,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:58,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:58,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:58,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:58,538 INFO L87 Difference]: Start difference. First operand 4809 states and 14989 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:58,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:58,985 INFO L93 Difference]: Finished difference Result 5753 states and 17358 transitions. [2021-06-05 03:53:58,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 03:53:58,986 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:58,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:58,992 INFO L225 Difference]: With dead ends: 5753 [2021-06-05 03:53:58,992 INFO L226 Difference]: Without dead ends: 5749 [2021-06-05 03:53:58,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 353.0ms TimeCoverageRelationStatistics Valid=805, Invalid=1547, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 03:53:58,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5749 states. [2021-06-05 03:53:59,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5749 to 4843. [2021-06-05 03:53:59,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4843 states, 4842 states have (on average 3.117513424204874) internal successors, (15095), 4842 states have internal predecessors, (15095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:59,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4843 states to 4843 states and 15095 transitions. [2021-06-05 03:53:59,054 INFO L78 Accepts]: Start accepts. Automaton has 4843 states and 15095 transitions. Word has length 22 [2021-06-05 03:53:59,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:59,054 INFO L482 AbstractCegarLoop]: Abstraction has 4843 states and 15095 transitions. [2021-06-05 03:53:59,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:59,054 INFO L276 IsEmpty]: Start isEmpty. Operand 4843 states and 15095 transitions. [2021-06-05 03:53:59,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:59,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:59,059 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:59,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-06-05 03:53:59,259 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:59,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:59,259 INFO L82 PathProgramCache]: Analyzing trace with hash 569182295, now seen corresponding path program 250 times [2021-06-05 03:53:59,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:59,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358621964] [2021-06-05 03:53:59,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:59,294 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:59,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:59,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358621964] [2021-06-05 03:53:59,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358621964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:59,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913556114] [2021-06-05 03:53:59,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:59,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:59,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:59,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:53:59,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:59,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913556114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:59,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:59,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 03:53:59,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422171077] [2021-06-05 03:53:59,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:59,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:59,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:59,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:59,399 INFO L87 Difference]: Start difference. First operand 4843 states and 15095 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:59,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:59,884 INFO L93 Difference]: Finished difference Result 6063 states and 18166 transitions. [2021-06-05 03:53:59,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 03:53:59,884 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:53:59,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:59,890 INFO L225 Difference]: With dead ends: 6063 [2021-06-05 03:53:59,890 INFO L226 Difference]: Without dead ends: 6063 [2021-06-05 03:53:59,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 387.8ms TimeCoverageRelationStatistics Valid=1038, Invalid=1824, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 03:53:59,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2021-06-05 03:53:59,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 4876. [2021-06-05 03:53:59,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4876 states, 4875 states have (on average 3.125948717948718) internal successors, (15239), 4875 states have internal predecessors, (15239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:59,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4876 states to 4876 states and 15239 transitions. [2021-06-05 03:53:59,946 INFO L78 Accepts]: Start accepts. Automaton has 4876 states and 15239 transitions. Word has length 22 [2021-06-05 03:53:59,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:59,946 INFO L482 AbstractCegarLoop]: Abstraction has 4876 states and 15239 transitions. [2021-06-05 03:53:59,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:59,946 INFO L276 IsEmpty]: Start isEmpty. Operand 4876 states and 15239 transitions. [2021-06-05 03:53:59,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:53:59,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:59,950 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:00,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:00,151 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:00,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:00,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1140637101, now seen corresponding path program 251 times [2021-06-05 03:54:00,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:00,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353100541] [2021-06-05 03:54:00,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:00,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:00,206 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:00,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:00,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353100541] [2021-06-05 03:54:00,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353100541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:00,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299803065] [2021-06-05 03:54:00,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:00,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:54:00,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:00,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:54:00,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:00,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299803065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:00,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:00,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 03:54:00,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422308307] [2021-06-05 03:54:00,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:00,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:00,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:00,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:00,312 INFO L87 Difference]: Start difference. First operand 4876 states and 15239 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:00,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:00,920 INFO L93 Difference]: Finished difference Result 5817 states and 17445 transitions. [2021-06-05 03:54:00,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 03:54:00,920 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:54:00,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:00,925 INFO L225 Difference]: With dead ends: 5817 [2021-06-05 03:54:00,925 INFO L226 Difference]: Without dead ends: 5808 [2021-06-05 03:54:00,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 535.8ms TimeCoverageRelationStatistics Valid=1537, Invalid=3293, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 03:54:00,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2021-06-05 03:54:00,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 4799. [2021-06-05 03:54:00,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4799 states, 4798 states have (on average 3.1192163401417257) internal successors, (14966), 4798 states have internal predecessors, (14966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:00,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4799 states to 4799 states and 14966 transitions. [2021-06-05 03:54:00,978 INFO L78 Accepts]: Start accepts. Automaton has 4799 states and 14966 transitions. Word has length 22 [2021-06-05 03:54:00,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:00,978 INFO L482 AbstractCegarLoop]: Abstraction has 4799 states and 14966 transitions. [2021-06-05 03:54:00,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:00,979 INFO L276 IsEmpty]: Start isEmpty. Operand 4799 states and 14966 transitions. [2021-06-05 03:54:00,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:54:00,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:00,983 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:01,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 03:54:01,183 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:01,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:01,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1675866903, now seen corresponding path program 252 times [2021-06-05 03:54:01,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:01,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239926604] [2021-06-05 03:54:01,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:01,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:01,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:01,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239926604] [2021-06-05 03:54:01,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239926604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:01,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845518668] [2021-06-05 03:54:01,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:01,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:54:01,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:01,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:54:01,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:01,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845518668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:01,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:01,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 03:54:01,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333196188] [2021-06-05 03:54:01,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:01,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:01,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:01,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:01,356 INFO L87 Difference]: Start difference. First operand 4799 states and 14966 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:01,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:01,974 INFO L93 Difference]: Finished difference Result 5773 states and 17293 transitions. [2021-06-05 03:54:01,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 03:54:01,974 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:54:01,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:01,980 INFO L225 Difference]: With dead ends: 5773 [2021-06-05 03:54:01,980 INFO L226 Difference]: Without dead ends: 5755 [2021-06-05 03:54:01,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 537.2ms TimeCoverageRelationStatistics Valid=1436, Invalid=3256, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 03:54:01,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5755 states. [2021-06-05 03:54:02,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5755 to 4708. [2021-06-05 03:54:02,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4708 states, 4707 states have (on average 3.11897174421075) internal successors, (14681), 4707 states have internal predecessors, (14681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:02,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4708 states to 4708 states and 14681 transitions. [2021-06-05 03:54:02,056 INFO L78 Accepts]: Start accepts. Automaton has 4708 states and 14681 transitions. Word has length 22 [2021-06-05 03:54:02,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:02,056 INFO L482 AbstractCegarLoop]: Abstraction has 4708 states and 14681 transitions. [2021-06-05 03:54:02,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:02,056 INFO L276 IsEmpty]: Start isEmpty. Operand 4708 states and 14681 transitions. [2021-06-05 03:54:02,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:54:02,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:02,061 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:02,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 03:54:02,262 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:02,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:02,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1088121581, now seen corresponding path program 253 times [2021-06-05 03:54:02,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:02,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674659746] [2021-06-05 03:54:02,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:02,312 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:02,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:02,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674659746] [2021-06-05 03:54:02,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674659746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:02,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024652581] [2021-06-05 03:54:02,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:02,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:02,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:54:02,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:02,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024652581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:02,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:02,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 03:54:02,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205214635] [2021-06-05 03:54:02,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:54:02,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:02,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:54:02,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:02,436 INFO L87 Difference]: Start difference. First operand 4708 states and 14681 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:02,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:02,958 INFO L93 Difference]: Finished difference Result 5582 states and 16822 transitions. [2021-06-05 03:54:02,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 03:54:02,958 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:54:02,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:02,964 INFO L225 Difference]: With dead ends: 5582 [2021-06-05 03:54:02,964 INFO L226 Difference]: Without dead ends: 5564 [2021-06-05 03:54:02,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 477.0ms TimeCoverageRelationStatistics Valid=1406, Invalid=3286, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 03:54:02,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5564 states. [2021-06-05 03:54:03,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5564 to 4728. [2021-06-05 03:54:03,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4728 states, 4727 states have (on average 3.119737677173683) internal successors, (14747), 4727 states have internal predecessors, (14747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:03,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4728 states to 4728 states and 14747 transitions. [2021-06-05 03:54:03,027 INFO L78 Accepts]: Start accepts. Automaton has 4728 states and 14747 transitions. Word has length 22 [2021-06-05 03:54:03,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:03,027 INFO L482 AbstractCegarLoop]: Abstraction has 4728 states and 14747 transitions. [2021-06-05 03:54:03,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:03,027 INFO L276 IsEmpty]: Start isEmpty. Operand 4728 states and 14747 transitions. [2021-06-05 03:54:03,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:54:03,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:03,032 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:03,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-05 03:54:03,233 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:03,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:03,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1165777525, now seen corresponding path program 254 times [2021-06-05 03:54:03,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:03,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244580610] [2021-06-05 03:54:03,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:03,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:03,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244580610] [2021-06-05 03:54:03,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244580610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:03,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399435610] [2021-06-05 03:54:03,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:03,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:03,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:03,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:54:03,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:03,405 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:03,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399435610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:03,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:03,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 03:54:03,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550539946] [2021-06-05 03:54:03,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:54:03,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:03,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:54:03,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:54:03,405 INFO L87 Difference]: Start difference. First operand 4728 states and 14747 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:03,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:03,932 INFO L93 Difference]: Finished difference Result 5063 states and 15470 transitions. [2021-06-05 03:54:03,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 03:54:03,932 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:54:03,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:03,938 INFO L225 Difference]: With dead ends: 5063 [2021-06-05 03:54:03,938 INFO L226 Difference]: Without dead ends: 5063 [2021-06-05 03:54:03,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 458.5ms TimeCoverageRelationStatistics Valid=1006, Invalid=2416, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 03:54:03,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5063 states. [2021-06-05 03:54:03,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5063 to 4692. [2021-06-05 03:54:03,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4692 states, 4691 states have (on average 3.118311660626732) internal successors, (14628), 4691 states have internal predecessors, (14628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:03,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4692 states to 4692 states and 14628 transitions. [2021-06-05 03:54:03,993 INFO L78 Accepts]: Start accepts. Automaton has 4692 states and 14628 transitions. Word has length 22 [2021-06-05 03:54:03,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:03,993 INFO L482 AbstractCegarLoop]: Abstraction has 4692 states and 14628 transitions. [2021-06-05 03:54:03,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:03,993 INFO L276 IsEmpty]: Start isEmpty. Operand 4692 states and 14628 transitions. [2021-06-05 03:54:03,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:54:03,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:03,998 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:04,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-06-05 03:54:04,198 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:04,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:04,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1392690059, now seen corresponding path program 255 times [2021-06-05 03:54:04,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:04,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306988530] [2021-06-05 03:54:04,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:04,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:04,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306988530] [2021-06-05 03:54:04,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306988530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:04,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636967728] [2021-06-05 03:54:04,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:04,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:54:04,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:04,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:54:04,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:04,361 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:04,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636967728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:04,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:04,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 03:54:04,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477356621] [2021-06-05 03:54:04,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:54:04,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:04,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:54:04,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:04,362 INFO L87 Difference]: Start difference. First operand 4692 states and 14628 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:04,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:04,823 INFO L93 Difference]: Finished difference Result 5220 states and 15784 transitions. [2021-06-05 03:54:04,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 03:54:04,823 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:54:04,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:04,829 INFO L225 Difference]: With dead ends: 5220 [2021-06-05 03:54:04,829 INFO L226 Difference]: Without dead ends: 5210 [2021-06-05 03:54:04,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 390.3ms TimeCoverageRelationStatistics Valid=809, Invalid=1947, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 03:54:04,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5210 states. [2021-06-05 03:54:04,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5210 to 4589. [2021-06-05 03:54:04,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4589 states, 4588 states have (on average 3.1200959023539667) internal successors, (14315), 4588 states have internal predecessors, (14315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:04,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4589 states to 4589 states and 14315 transitions. [2021-06-05 03:54:04,885 INFO L78 Accepts]: Start accepts. Automaton has 4589 states and 14315 transitions. Word has length 22 [2021-06-05 03:54:04,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:04,885 INFO L482 AbstractCegarLoop]: Abstraction has 4589 states and 14315 transitions. [2021-06-05 03:54:04,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:04,885 INFO L276 IsEmpty]: Start isEmpty. Operand 4589 states and 14315 transitions. [2021-06-05 03:54:04,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:54:04,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:04,890 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:05,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 03:54:05,091 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:05,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:05,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1059579275, now seen corresponding path program 256 times [2021-06-05 03:54:05,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:05,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786206268] [2021-06-05 03:54:05,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:05,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:05,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786206268] [2021-06-05 03:54:05,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786206268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:05,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395333577] [2021-06-05 03:54:05,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:05,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:05,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:05,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:54:05,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:05,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395333577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:05,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:05,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 03:54:05,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835980286] [2021-06-05 03:54:05,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:05,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:05,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:05,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:05,261 INFO L87 Difference]: Start difference. First operand 4589 states and 14315 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:05,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:05,736 INFO L93 Difference]: Finished difference Result 5724 states and 17179 transitions. [2021-06-05 03:54:05,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 03:54:05,736 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:54:05,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:05,743 INFO L225 Difference]: With dead ends: 5724 [2021-06-05 03:54:05,743 INFO L226 Difference]: Without dead ends: 5718 [2021-06-05 03:54:05,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 387.3ms TimeCoverageRelationStatistics Valid=801, Invalid=1749, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 03:54:05,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5718 states. [2021-06-05 03:54:05,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5718 to 4609. [2021-06-05 03:54:05,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4609 states, 4608 states have (on average 3.118923611111111) internal successors, (14372), 4608 states have internal predecessors, (14372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:05,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4609 states to 4609 states and 14372 transitions. [2021-06-05 03:54:05,817 INFO L78 Accepts]: Start accepts. Automaton has 4609 states and 14372 transitions. Word has length 22 [2021-06-05 03:54:05,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:05,817 INFO L482 AbstractCegarLoop]: Abstraction has 4609 states and 14372 transitions. [2021-06-05 03:54:05,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:05,817 INFO L276 IsEmpty]: Start isEmpty. Operand 4609 states and 14372 transitions. [2021-06-05 03:54:05,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:54:05,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:05,822 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:06,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:06,022 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:06,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:06,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1999207541, now seen corresponding path program 257 times [2021-06-05 03:54:06,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:06,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895792966] [2021-06-05 03:54:06,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:06,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:06,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895792966] [2021-06-05 03:54:06,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895792966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:06,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882961414] [2021-06-05 03:54:06,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:06,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 03:54:06,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:06,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:54:06,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:06,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882961414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:06,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:06,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 03:54:06,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745746118] [2021-06-05 03:54:06,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:06,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:06,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:06,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:06,175 INFO L87 Difference]: Start difference. First operand 4609 states and 14372 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:06,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:06,605 INFO L93 Difference]: Finished difference Result 6302 states and 18942 transitions. [2021-06-05 03:54:06,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 03:54:06,605 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:54:06,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:06,611 INFO L225 Difference]: With dead ends: 6302 [2021-06-05 03:54:06,611 INFO L226 Difference]: Without dead ends: 6300 [2021-06-05 03:54:06,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 365.7ms TimeCoverageRelationStatistics Valid=834, Invalid=1616, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 03:54:06,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6300 states. [2021-06-05 03:54:06,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6300 to 4905. [2021-06-05 03:54:06,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4905 states, 4904 states have (on average 3.1176590538336053) internal successors, (15289), 4904 states have internal predecessors, (15289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:06,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 15289 transitions. [2021-06-05 03:54:06,673 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 15289 transitions. Word has length 22 [2021-06-05 03:54:06,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:06,673 INFO L482 AbstractCegarLoop]: Abstraction has 4905 states and 15289 transitions. [2021-06-05 03:54:06,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:06,673 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 15289 transitions. [2021-06-05 03:54:06,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:54:06,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:06,678 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:06,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:06,879 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:06,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:06,879 INFO L82 PathProgramCache]: Analyzing trace with hash 534521227, now seen corresponding path program 258 times [2021-06-05 03:54:06,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:06,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754994403] [2021-06-05 03:54:06,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:06,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:06,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:06,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754994403] [2021-06-05 03:54:06,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754994403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:06,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729715214] [2021-06-05 03:54:06,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:06,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:54:06,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:06,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:54:06,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:07,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729715214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:07,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:07,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 03:54:07,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023226624] [2021-06-05 03:54:07,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:07,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:07,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:07,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:07,047 INFO L87 Difference]: Start difference. First operand 4905 states and 15289 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:07,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:07,532 INFO L93 Difference]: Finished difference Result 6307 states and 18845 transitions. [2021-06-05 03:54:07,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 03:54:07,532 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:54:07,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:07,539 INFO L225 Difference]: With dead ends: 6307 [2021-06-05 03:54:07,539 INFO L226 Difference]: Without dead ends: 6307 [2021-06-05 03:54:07,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 413.4ms TimeCoverageRelationStatistics Valid=966, Invalid=1686, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 03:54:07,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6307 states. [2021-06-05 03:54:07,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6307 to 5098. [2021-06-05 03:54:07,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5098 states, 5097 states have (on average 3.1271336080047085) internal successors, (15939), 5097 states have internal predecessors, (15939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:07,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5098 states to 5098 states and 15939 transitions. [2021-06-05 03:54:07,611 INFO L78 Accepts]: Start accepts. Automaton has 5098 states and 15939 transitions. Word has length 22 [2021-06-05 03:54:07,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:07,611 INFO L482 AbstractCegarLoop]: Abstraction has 5098 states and 15939 transitions. [2021-06-05 03:54:07,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:07,611 INFO L276 IsEmpty]: Start isEmpty. Operand 5098 states and 15939 transitions. [2021-06-05 03:54:07,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:54:07,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:07,616 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:07,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:07,817 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:07,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:07,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1105976033, now seen corresponding path program 259 times [2021-06-05 03:54:07,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:07,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988527675] [2021-06-05 03:54:07,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:07,847 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:07,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:07,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988527675] [2021-06-05 03:54:07,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988527675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:07,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402267330] [2021-06-05 03:54:07,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:07,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:54:07,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:07,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402267330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:07,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:07,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 03:54:07,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259880834] [2021-06-05 03:54:07,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:07,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:07,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:07,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:07,973 INFO L87 Difference]: Start difference. First operand 5098 states and 15939 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:08,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:08,671 INFO L93 Difference]: Finished difference Result 6203 states and 18588 transitions. [2021-06-05 03:54:08,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 03:54:08,671 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:54:08,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:08,678 INFO L225 Difference]: With dead ends: 6203 [2021-06-05 03:54:08,678 INFO L226 Difference]: Without dead ends: 6194 [2021-06-05 03:54:08,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 582.3ms TimeCoverageRelationStatistics Valid=1706, Invalid=3844, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 03:54:08,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6194 states. [2021-06-05 03:54:08,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6194 to 5023. [2021-06-05 03:54:08,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5023 states, 5022 states have (on average 3.122859418558343) internal successors, (15683), 5022 states have internal predecessors, (15683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:08,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5023 states to 5023 states and 15683 transitions. [2021-06-05 03:54:08,751 INFO L78 Accepts]: Start accepts. Automaton has 5023 states and 15683 transitions. Word has length 22 [2021-06-05 03:54:08,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:08,751 INFO L482 AbstractCegarLoop]: Abstraction has 5023 states and 15683 transitions. [2021-06-05 03:54:08,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:08,751 INFO L276 IsEmpty]: Start isEmpty. Operand 5023 states and 15683 transitions. [2021-06-05 03:54:08,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:54:08,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:08,757 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:08,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:08,957 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:08,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:08,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1641205835, now seen corresponding path program 260 times [2021-06-05 03:54:08,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:08,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656058434] [2021-06-05 03:54:08,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:08,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:08,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:08,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656058434] [2021-06-05 03:54:08,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656058434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:08,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474378660] [2021-06-05 03:54:08,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:09,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:09,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:09,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:54:09,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:09,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474378660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:09,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:09,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 03:54:09,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860748702] [2021-06-05 03:54:09,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:09,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:09,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:09,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:09,108 INFO L87 Difference]: Start difference. First operand 5023 states and 15683 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:09,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:09,740 INFO L93 Difference]: Finished difference Result 6188 states and 18528 transitions. [2021-06-05 03:54:09,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 03:54:09,740 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:54:09,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:09,747 INFO L225 Difference]: With dead ends: 6188 [2021-06-05 03:54:09,747 INFO L226 Difference]: Without dead ends: 6176 [2021-06-05 03:54:09,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 542.6ms TimeCoverageRelationStatistics Valid=1503, Invalid=3609, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 03:54:09,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6176 states. [2021-06-05 03:54:09,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6176 to 5007. [2021-06-05 03:54:09,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5007 states, 5006 states have (on average 3.1220535357570913) internal successors, (15629), 5006 states have internal predecessors, (15629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:09,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5007 states to 5007 states and 15629 transitions. [2021-06-05 03:54:09,818 INFO L78 Accepts]: Start accepts. Automaton has 5007 states and 15629 transitions. Word has length 22 [2021-06-05 03:54:09,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:09,818 INFO L482 AbstractCegarLoop]: Abstraction has 5007 states and 15629 transitions. [2021-06-05 03:54:09,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:09,818 INFO L276 IsEmpty]: Start isEmpty. Operand 5007 states and 15629 transitions. [2021-06-05 03:54:09,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:54:09,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:09,823 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:10,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-05 03:54:10,023 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:10,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:10,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1053460513, now seen corresponding path program 261 times [2021-06-05 03:54:10,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:10,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957934229] [2021-06-05 03:54:10,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:10,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:10,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:10,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957934229] [2021-06-05 03:54:10,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957934229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:10,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086244852] [2021-06-05 03:54:10,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:10,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:54:10,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:10,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:54:10,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:10,182 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:10,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086244852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:10,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:10,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 03:54:10,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898433354] [2021-06-05 03:54:10,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:54:10,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:10,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:54:10,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:10,183 INFO L87 Difference]: Start difference. First operand 5007 states and 15629 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:10,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:10,786 INFO L93 Difference]: Finished difference Result 6237 states and 18671 transitions. [2021-06-05 03:54:10,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 03:54:10,786 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:54:10,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:10,792 INFO L225 Difference]: With dead ends: 6237 [2021-06-05 03:54:10,792 INFO L226 Difference]: Without dead ends: 6219 [2021-06-05 03:54:10,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 530.5ms TimeCoverageRelationStatistics Valid=1373, Invalid=3457, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 03:54:10,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6219 states. [2021-06-05 03:54:10,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6219 to 5025. [2021-06-05 03:54:10,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5025 states, 5024 states have (on average 3.1240047770700636) internal successors, (15695), 5024 states have internal predecessors, (15695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:10,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5025 states to 5025 states and 15695 transitions. [2021-06-05 03:54:10,850 INFO L78 Accepts]: Start accepts. Automaton has 5025 states and 15695 transitions. Word has length 22 [2021-06-05 03:54:10,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:10,850 INFO L482 AbstractCegarLoop]: Abstraction has 5025 states and 15695 transitions. [2021-06-05 03:54:10,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:10,850 INFO L276 IsEmpty]: Start isEmpty. Operand 5025 states and 15695 transitions. [2021-06-05 03:54:10,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:54:10,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:10,854 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:11,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 03:54:11,055 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:11,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:11,055 INFO L82 PathProgramCache]: Analyzing trace with hash 13224715, now seen corresponding path program 262 times [2021-06-05 03:54:11,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:11,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631413387] [2021-06-05 03:54:11,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:11,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:11,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631413387] [2021-06-05 03:54:11,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631413387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:11,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939140631] [2021-06-05 03:54:11,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:11,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:11,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:11,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:54:11,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:11,262 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:11,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939140631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:11,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:11,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 03:54:11,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192164070] [2021-06-05 03:54:11,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:54:11,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:11,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:54:11,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:54:11,263 INFO L87 Difference]: Start difference. First operand 5025 states and 15695 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:11,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:11,806 INFO L93 Difference]: Finished difference Result 6089 states and 18341 transitions. [2021-06-05 03:54:11,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 03:54:11,806 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:54:11,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:11,812 INFO L225 Difference]: With dead ends: 6089 [2021-06-05 03:54:11,812 INFO L226 Difference]: Without dead ends: 6065 [2021-06-05 03:54:11,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 523.3ms TimeCoverageRelationStatistics Valid=1314, Invalid=3378, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 03:54:11,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6065 states. [2021-06-05 03:54:11,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6065 to 5048. [2021-06-05 03:54:11,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5048 states, 5047 states have (on average 3.125619179710719) internal successors, (15775), 5047 states have internal predecessors, (15775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:11,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5048 states to 5048 states and 15775 transitions. [2021-06-05 03:54:11,880 INFO L78 Accepts]: Start accepts. Automaton has 5048 states and 15775 transitions. Word has length 22 [2021-06-05 03:54:11,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:11,880 INFO L482 AbstractCegarLoop]: Abstraction has 5048 states and 15775 transitions. [2021-06-05 03:54:11,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:11,880 INFO L276 IsEmpty]: Start isEmpty. Operand 5048 states and 15775 transitions. [2021-06-05 03:54:11,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:54:11,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:11,885 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:12,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-05 03:54:12,086 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:12,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:12,086 INFO L82 PathProgramCache]: Analyzing trace with hash 51612887, now seen corresponding path program 263 times [2021-06-05 03:54:12,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:12,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56762052] [2021-06-05 03:54:12,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:12,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:12,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:12,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56762052] [2021-06-05 03:54:12,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56762052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:12,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098768569] [2021-06-05 03:54:12,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:12,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:54:12,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:12,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:54:12,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:12,279 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:12,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098768569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:12,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:12,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 03:54:12,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917783079] [2021-06-05 03:54:12,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:54:12,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:12,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:54:12,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:54:12,280 INFO L87 Difference]: Start difference. First operand 5048 states and 15775 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:12,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:12,804 INFO L93 Difference]: Finished difference Result 5685 states and 17310 transitions. [2021-06-05 03:54:12,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 03:54:12,804 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:54:12,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:12,812 INFO L225 Difference]: With dead ends: 5685 [2021-06-05 03:54:12,812 INFO L226 Difference]: Without dead ends: 5685 [2021-06-05 03:54:12,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 481.9ms TimeCoverageRelationStatistics Valid=1082, Invalid=2700, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 03:54:12,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5685 states. [2021-06-05 03:54:12,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5685 to 5099. [2021-06-05 03:54:12,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5099 states, 5098 states have (on average 3.1196547665751275) internal successors, (15904), 5098 states have internal predecessors, (15904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:12,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5099 states to 5099 states and 15904 transitions. [2021-06-05 03:54:12,889 INFO L78 Accepts]: Start accepts. Automaton has 5099 states and 15904 transitions. Word has length 22 [2021-06-05 03:54:12,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:12,889 INFO L482 AbstractCegarLoop]: Abstraction has 5099 states and 15904 transitions. [2021-06-05 03:54:12,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:12,889 INFO L276 IsEmpty]: Start isEmpty. Operand 5099 states and 15904 transitions. [2021-06-05 03:54:12,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:54:12,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:12,895 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:13,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 03:54:13,109 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:13,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:13,109 INFO L82 PathProgramCache]: Analyzing trace with hash -550327729, now seen corresponding path program 264 times [2021-06-05 03:54:13,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:13,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763263541] [2021-06-05 03:54:13,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:13,188 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:13,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:13,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763263541] [2021-06-05 03:54:13,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763263541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:13,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833693374] [2021-06-05 03:54:13,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:13,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:54:13,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:13,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:54:13,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:13,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833693374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:13,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:13,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 03:54:13,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291194943] [2021-06-05 03:54:13,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:54:13,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:13,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:54:13,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:54:13,327 INFO L87 Difference]: Start difference. First operand 5099 states and 15904 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:13,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:13,834 INFO L93 Difference]: Finished difference Result 6196 states and 18689 transitions. [2021-06-05 03:54:13,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 03:54:13,835 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:54:13,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:13,842 INFO L225 Difference]: With dead ends: 6196 [2021-06-05 03:54:13,842 INFO L226 Difference]: Without dead ends: 6196 [2021-06-05 03:54:13,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 432.4ms TimeCoverageRelationStatistics Valid=846, Invalid=2124, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 03:54:13,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6196 states. [2021-06-05 03:54:13,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6196 to 5243. [2021-06-05 03:54:13,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5243 states, 5242 states have (on average 3.119420068676078) internal successors, (16352), 5242 states have internal predecessors, (16352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:13,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5243 states to 5243 states and 16352 transitions. [2021-06-05 03:54:13,916 INFO L78 Accepts]: Start accepts. Automaton has 5243 states and 16352 transitions. Word has length 22 [2021-06-05 03:54:13,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:13,916 INFO L482 AbstractCegarLoop]: Abstraction has 5243 states and 16352 transitions. [2021-06-05 03:54:13,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:13,916 INFO L276 IsEmpty]: Start isEmpty. Operand 5243 states and 16352 transitions. [2021-06-05 03:54:13,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:54:13,922 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:13,922 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:14,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-06-05 03:54:14,122 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:14,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:14,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1401029161, now seen corresponding path program 265 times [2021-06-05 03:54:14,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:14,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749211353] [2021-06-05 03:54:14,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:14,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:14,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749211353] [2021-06-05 03:54:14,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749211353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:14,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182369158] [2021-06-05 03:54:14,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:14,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:54:14,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:14,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182369158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:14,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:14,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-05 03:54:14,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731756280] [2021-06-05 03:54:14,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:54:14,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:14,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:54:14,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:14,281 INFO L87 Difference]: Start difference. First operand 5243 states and 16352 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:14,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:14,769 INFO L93 Difference]: Finished difference Result 6611 states and 19949 transitions. [2021-06-05 03:54:14,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 03:54:14,769 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:54:14,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:14,778 INFO L225 Difference]: With dead ends: 6611 [2021-06-05 03:54:14,778 INFO L226 Difference]: Without dead ends: 6611 [2021-06-05 03:54:14,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 394.4ms TimeCoverageRelationStatistics Valid=827, Invalid=1929, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 03:54:14,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6611 states. [2021-06-05 03:54:14,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6611 to 5413. [2021-06-05 03:54:14,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5413 states, 5412 states have (on average 3.1225055432372506) internal successors, (16899), 5412 states have internal predecessors, (16899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:14,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5413 states to 5413 states and 16899 transitions. [2021-06-05 03:54:14,857 INFO L78 Accepts]: Start accepts. Automaton has 5413 states and 16899 transitions. Word has length 22 [2021-06-05 03:54:14,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:14,857 INFO L482 AbstractCegarLoop]: Abstraction has 5413 states and 16899 transitions. [2021-06-05 03:54:14,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:14,857 INFO L276 IsEmpty]: Start isEmpty. Operand 5413 states and 16899 transitions. [2021-06-05 03:54:14,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:54:14,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:14,863 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:15,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-06-05 03:54:15,064 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:15,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:15,064 INFO L82 PathProgramCache]: Analyzing trace with hash 372644175, now seen corresponding path program 266 times [2021-06-05 03:54:15,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:15,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002738835] [2021-06-05 03:54:15,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:15,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:15,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:15,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002738835] [2021-06-05 03:54:15,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002738835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:15,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961080551] [2021-06-05 03:54:15,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:15,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:15,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:15,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:54:15,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:15,213 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:15,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961080551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:15,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:15,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 03:54:15,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58188586] [2021-06-05 03:54:15,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:15,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:15,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:15,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:15,214 INFO L87 Difference]: Start difference. First operand 5413 states and 16899 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:15,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:15,696 INFO L93 Difference]: Finished difference Result 7182 states and 21641 transitions. [2021-06-05 03:54:15,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 03:54:15,696 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:54:15,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:15,705 INFO L225 Difference]: With dead ends: 7182 [2021-06-05 03:54:15,706 INFO L226 Difference]: Without dead ends: 7182 [2021-06-05 03:54:15,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 390.8ms TimeCoverageRelationStatistics Valid=864, Invalid=1788, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 03:54:15,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7182 states. [2021-06-05 03:54:15,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7182 to 5709. [2021-06-05 03:54:15,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5709 states, 5708 states have (on average 3.128416257883672) internal successors, (17857), 5708 states have internal predecessors, (17857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:15,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5709 states to 5709 states and 17857 transitions. [2021-06-05 03:54:15,797 INFO L78 Accepts]: Start accepts. Automaton has 5709 states and 17857 transitions. Word has length 22 [2021-06-05 03:54:15,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:15,797 INFO L482 AbstractCegarLoop]: Abstraction has 5709 states and 17857 transitions. [2021-06-05 03:54:15,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:15,797 INFO L276 IsEmpty]: Start isEmpty. Operand 5709 states and 17857 transitions. [2021-06-05 03:54:15,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:54:15,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:15,803 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:16,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:16,009 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:16,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:16,009 INFO L82 PathProgramCache]: Analyzing trace with hash -539971881, now seen corresponding path program 267 times [2021-06-05 03:54:16,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:16,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892558050] [2021-06-05 03:54:16,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:16,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:16,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892558050] [2021-06-05 03:54:16,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892558050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:16,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759009134] [2021-06-05 03:54:16,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:16,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:54:16,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:16,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:54:16,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:16,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759009134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:16,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:16,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-06-05 03:54:16,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572166640] [2021-06-05 03:54:16,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:16,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:16,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:16,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:16,148 INFO L87 Difference]: Start difference. First operand 5709 states and 17857 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:16,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:16,643 INFO L93 Difference]: Finished difference Result 8455 states and 25540 transitions. [2021-06-05 03:54:16,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 03:54:16,643 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:54:16,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:16,655 INFO L225 Difference]: With dead ends: 8455 [2021-06-05 03:54:16,655 INFO L226 Difference]: Without dead ends: 8455 [2021-06-05 03:54:16,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 391.4ms TimeCoverageRelationStatistics Valid=950, Invalid=1702, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 03:54:16,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8455 states. [2021-06-05 03:54:16,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8455 to 6970. [2021-06-05 03:54:16,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6970 states, 6969 states have (on average 3.147366910604104) internal successors, (21934), 6969 states have internal predecessors, (21934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:16,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6970 states to 6970 states and 21934 transitions. [2021-06-05 03:54:16,767 INFO L78 Accepts]: Start accepts. Automaton has 6970 states and 21934 transitions. Word has length 22 [2021-06-05 03:54:16,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:16,767 INFO L482 AbstractCegarLoop]: Abstraction has 6970 states and 21934 transitions. [2021-06-05 03:54:16,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:16,767 INFO L276 IsEmpty]: Start isEmpty. Operand 6970 states and 21934 transitions. [2021-06-05 03:54:16,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:54:16,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:16,775 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:16,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-06-05 03:54:16,976 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:16,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:16,976 INFO L82 PathProgramCache]: Analyzing trace with hash 31482925, now seen corresponding path program 268 times [2021-06-05 03:54:16,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:16,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989760674] [2021-06-05 03:54:16,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:17,004 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:17,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:17,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989760674] [2021-06-05 03:54:17,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989760674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:17,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752062310] [2021-06-05 03:54:17,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:17,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:17,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:17,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:54:17,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:17,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752062310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:17,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:17,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-06-05 03:54:17,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915997621] [2021-06-05 03:54:17,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:17,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:17,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:17,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:17,118 INFO L87 Difference]: Start difference. First operand 6970 states and 21934 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:17,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:17,931 INFO L93 Difference]: Finished difference Result 8123 states and 24573 transitions. [2021-06-05 03:54:17,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 03:54:17,932 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:54:17,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:17,941 INFO L225 Difference]: With dead ends: 8123 [2021-06-05 03:54:17,941 INFO L226 Difference]: Without dead ends: 8117 [2021-06-05 03:54:17,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2442 ImplicationChecksByTransitivity, 683.4ms TimeCoverageRelationStatistics Valid=1939, Invalid=4703, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 03:54:17,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-06-05 03:54:18,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 6930. [2021-06-05 03:54:18,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6930 states, 6929 states have (on average 3.1440323278972433) internal successors, (21785), 6929 states have internal predecessors, (21785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:18,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6930 states to 6930 states and 21785 transitions. [2021-06-05 03:54:18,049 INFO L78 Accepts]: Start accepts. Automaton has 6930 states and 21785 transitions. Word has length 22 [2021-06-05 03:54:18,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:18,049 INFO L482 AbstractCegarLoop]: Abstraction has 6930 states and 21785 transitions. [2021-06-05 03:54:18,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:18,049 INFO L276 IsEmpty]: Start isEmpty. Operand 6930 states and 21785 transitions. [2021-06-05 03:54:18,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:54:18,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:18,057 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:18,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:18,258 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:18,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:18,258 INFO L82 PathProgramCache]: Analyzing trace with hash 566712727, now seen corresponding path program 269 times [2021-06-05 03:54:18,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:18,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518930804] [2021-06-05 03:54:18,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:18,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:18,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518930804] [2021-06-05 03:54:18,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518930804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:18,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313930883] [2021-06-05 03:54:18,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:18,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:54:18,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:18,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:54:18,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:18,417 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:18,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313930883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:18,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:18,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 03:54:18,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258320331] [2021-06-05 03:54:18,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:18,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:18,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:18,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:18,417 INFO L87 Difference]: Start difference. First operand 6930 states and 21785 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:19,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:19,163 INFO L93 Difference]: Finished difference Result 8123 states and 24622 transitions. [2021-06-05 03:54:19,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 03:54:19,164 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:54:19,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:19,173 INFO L225 Difference]: With dead ends: 8123 [2021-06-05 03:54:19,173 INFO L226 Difference]: Without dead ends: 8111 [2021-06-05 03:54:19,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 641.3ms TimeCoverageRelationStatistics Valid=1649, Invalid=4203, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 03:54:19,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8111 states. [2021-06-05 03:54:19,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8111 to 6927. [2021-06-05 03:54:19,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6927 states, 6926 states have (on average 3.1453941669073058) internal successors, (21785), 6926 states have internal predecessors, (21785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:19,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6927 states to 6927 states and 21785 transitions. [2021-06-05 03:54:19,276 INFO L78 Accepts]: Start accepts. Automaton has 6927 states and 21785 transitions. Word has length 22 [2021-06-05 03:54:19,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:19,277 INFO L482 AbstractCegarLoop]: Abstraction has 6927 states and 21785 transitions. [2021-06-05 03:54:19,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:19,277 INFO L276 IsEmpty]: Start isEmpty. Operand 6927 states and 21785 transitions. [2021-06-05 03:54:19,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:54:19,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:19,316 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:19,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:19,517 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:19,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:19,517 INFO L82 PathProgramCache]: Analyzing trace with hash -21032595, now seen corresponding path program 270 times [2021-06-05 03:54:19,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:19,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564761555] [2021-06-05 03:54:19,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:19,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:19,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564761555] [2021-06-05 03:54:19,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564761555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:19,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600840485] [2021-06-05 03:54:19,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:19,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:54:19,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:19,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:54:19,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:19,675 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:19,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600840485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:19,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:19,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-05 03:54:19,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049865026] [2021-06-05 03:54:19,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:54:19,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:19,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:54:19,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:19,675 INFO L87 Difference]: Start difference. First operand 6927 states and 21785 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:20,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:20,299 INFO L93 Difference]: Finished difference Result 8230 states and 24962 transitions. [2021-06-05 03:54:20,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 03:54:20,299 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:54:20,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:20,309 INFO L225 Difference]: With dead ends: 8230 [2021-06-05 03:54:20,309 INFO L226 Difference]: Without dead ends: 8212 [2021-06-05 03:54:20,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 557.6ms TimeCoverageRelationStatistics Valid=1425, Invalid=3831, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 03:54:20,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8212 states. [2021-06-05 03:54:20,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8212 to 7085. [2021-06-05 03:54:20,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7085 states, 7084 states have (on average 3.148927159796725) internal successors, (22307), 7084 states have internal predecessors, (22307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:20,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7085 states to 7085 states and 22307 transitions. [2021-06-05 03:54:20,410 INFO L78 Accepts]: Start accepts. Automaton has 7085 states and 22307 transitions. Word has length 22 [2021-06-05 03:54:20,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:20,410 INFO L482 AbstractCegarLoop]: Abstraction has 7085 states and 22307 transitions. [2021-06-05 03:54:20,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:20,410 INFO L276 IsEmpty]: Start isEmpty. Operand 7085 states and 22307 transitions. [2021-06-05 03:54:20,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:54:20,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:20,418 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:20,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:20,618 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:20,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:20,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1061268393, now seen corresponding path program 271 times [2021-06-05 03:54:20,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:20,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145897571] [2021-06-05 03:54:20,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:20,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:20,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145897571] [2021-06-05 03:54:20,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145897571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:20,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40007858] [2021-06-05 03:54:20,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:20,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:54:20,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:20,795 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:20,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40007858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:20,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:20,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 03:54:20,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863756468] [2021-06-05 03:54:20,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:54:20,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:20,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:54:20,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:54:20,795 INFO L87 Difference]: Start difference. First operand 7085 states and 22307 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:21,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:21,416 INFO L93 Difference]: Finished difference Result 8473 states and 25731 transitions. [2021-06-05 03:54:21,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 03:54:21,417 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:54:21,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:21,426 INFO L225 Difference]: With dead ends: 8473 [2021-06-05 03:54:21,427 INFO L226 Difference]: Without dead ends: 8449 [2021-06-05 03:54:21,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 544.7ms TimeCoverageRelationStatistics Valid=1272, Invalid=3558, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 03:54:21,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8449 states. [2021-06-05 03:54:21,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8449 to 7305. [2021-06-05 03:54:21,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7305 states, 7304 states have (on average 3.1519715224534504) internal successors, (23022), 7304 states have internal predecessors, (23022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7305 states to 7305 states and 23022 transitions. [2021-06-05 03:54:21,533 INFO L78 Accepts]: Start accepts. Automaton has 7305 states and 23022 transitions. Word has length 22 [2021-06-05 03:54:21,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:21,533 INFO L482 AbstractCegarLoop]: Abstraction has 7305 states and 23022 transitions. [2021-06-05 03:54:21,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:21,533 INFO L276 IsEmpty]: Start isEmpty. Operand 7305 states and 23022 transitions. [2021-06-05 03:54:21,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 03:54:21,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:21,541 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:21,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-06-05 03:54:21,742 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:21,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:21,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1051160237, now seen corresponding path program 272 times [2021-06-05 03:54:21,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:21,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389417781] [2021-06-05 03:54:21,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:21,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:21,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:21,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389417781] [2021-06-05 03:54:21,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389417781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:21,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061151467] [2021-06-05 03:54:21,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:21,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:21,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:21,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:54:21,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:21,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061151467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:21,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:21,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 03:54:21,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917373148] [2021-06-05 03:54:21,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:54:21,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:21,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:54:21,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:54:21,921 INFO L87 Difference]: Start difference. First operand 7305 states and 23022 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:22,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:22,437 INFO L93 Difference]: Finished difference Result 8382 states and 25614 transitions. [2021-06-05 03:54:22,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 03:54:22,437 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 03:54:22,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:22,448 INFO L225 Difference]: With dead ends: 8382 [2021-06-05 03:54:22,448 INFO L226 Difference]: Without dead ends: 8352 [2021-06-05 03:54:22,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 479.3ms TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 03:54:22,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2021-06-05 03:54:22,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 7353. [2021-06-05 03:54:22,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7353 states, 7352 states have (on average 3.1509793253536453) internal successors, (23166), 7352 states have internal predecessors, (23166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:22,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7353 states to 7353 states and 23166 transitions. [2021-06-05 03:54:22,556 INFO L78 Accepts]: Start accepts. Automaton has 7353 states and 23166 transitions. Word has length 22 [2021-06-05 03:54:22,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:22,556 INFO L482 AbstractCegarLoop]: Abstraction has 7353 states and 23166 transitions. [2021-06-05 03:54:22,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:22,556 INFO L276 IsEmpty]: Start isEmpty. Operand 7353 states and 23166 transitions. [2021-06-05 03:54:22,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:22,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:22,565 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:22,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-05 03:54:22,765 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:22,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:22,765 INFO L82 PathProgramCache]: Analyzing trace with hash -943740933, now seen corresponding path program 273 times [2021-06-05 03:54:22,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:22,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550111686] [2021-06-05 03:54:22,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:22,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:22,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550111686] [2021-06-05 03:54:22,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550111686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:22,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302153852] [2021-06-05 03:54:22,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:22,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:54:22,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:22,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:22,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:23,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302153852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:23,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:23,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 03:54:23,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081785578] [2021-06-05 03:54:23,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:23,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:23,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:23,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:23,082 INFO L87 Difference]: Start difference. First operand 7353 states and 23166 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:23,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:23,494 INFO L93 Difference]: Finished difference Result 7724 states and 23857 transitions. [2021-06-05 03:54:23,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:54:23,495 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:23,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:23,504 INFO L225 Difference]: With dead ends: 7724 [2021-06-05 03:54:23,504 INFO L226 Difference]: Without dead ends: 7695 [2021-06-05 03:54:23,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 355.6ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:54:23,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7695 states. [2021-06-05 03:54:23,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7695 to 7410. [2021-06-05 03:54:23,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7410 states, 7409 states have (on average 3.140099878526117) internal successors, (23265), 7409 states have internal predecessors, (23265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:23,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 23265 transitions. [2021-06-05 03:54:23,593 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 23265 transitions. Word has length 23 [2021-06-05 03:54:23,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:23,593 INFO L482 AbstractCegarLoop]: Abstraction has 7410 states and 23265 transitions. [2021-06-05 03:54:23,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:23,593 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 23265 transitions. [2021-06-05 03:54:23,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:23,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:23,602 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:23,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-06-05 03:54:23,802 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:23,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:23,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1733943489, now seen corresponding path program 274 times [2021-06-05 03:54:23,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:23,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455225777] [2021-06-05 03:54:23,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:23,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:23,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455225777] [2021-06-05 03:54:23,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455225777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:23,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338920638] [2021-06-05 03:54:23,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:23,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:23,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:23,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:23,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:24,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338920638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:24,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:24,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 03:54:24,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218644067] [2021-06-05 03:54:24,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:24,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:24,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:24,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:24,073 INFO L87 Difference]: Start difference. First operand 7410 states and 23265 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:24,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:24,322 INFO L93 Difference]: Finished difference Result 7815 states and 24110 transitions. [2021-06-05 03:54:24,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:54:24,322 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:24,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:24,334 INFO L225 Difference]: With dead ends: 7815 [2021-06-05 03:54:24,334 INFO L226 Difference]: Without dead ends: 7808 [2021-06-05 03:54:24,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 236.4ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:54:24,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7808 states. [2021-06-05 03:54:24,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7808 to 7508. [2021-06-05 03:54:24,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7508 states, 7507 states have (on average 3.1443985613427468) internal successors, (23605), 7507 states have internal predecessors, (23605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:24,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7508 states to 7508 states and 23605 transitions. [2021-06-05 03:54:24,444 INFO L78 Accepts]: Start accepts. Automaton has 7508 states and 23605 transitions. Word has length 23 [2021-06-05 03:54:24,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:24,444 INFO L482 AbstractCegarLoop]: Abstraction has 7508 states and 23605 transitions. [2021-06-05 03:54:24,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:24,444 INFO L276 IsEmpty]: Start isEmpty. Operand 7508 states and 23605 transitions. [2021-06-05 03:54:24,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:24,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:24,453 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:24,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-06-05 03:54:24,653 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:24,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:24,653 INFO L82 PathProgramCache]: Analyzing trace with hash -119240765, now seen corresponding path program 275 times [2021-06-05 03:54:24,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:24,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272633065] [2021-06-05 03:54:24,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:24,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:24,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272633065] [2021-06-05 03:54:24,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272633065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:24,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491006362] [2021-06-05 03:54:24,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:24,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:54:24,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:24,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:24,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:24,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491006362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:24,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:24,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 03:54:24,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227697056] [2021-06-05 03:54:24,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:54:24,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:24,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:54:24,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:24,966 INFO L87 Difference]: Start difference. First operand 7508 states and 23605 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:25,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:25,244 INFO L93 Difference]: Finished difference Result 7801 states and 24090 transitions. [2021-06-05 03:54:25,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:54:25,244 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:25,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:25,255 INFO L225 Difference]: With dead ends: 7801 [2021-06-05 03:54:25,255 INFO L226 Difference]: Without dead ends: 7785 [2021-06-05 03:54:25,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 268.6ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:54:25,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7785 states. [2021-06-05 03:54:25,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7785 to 7430. [2021-06-05 03:54:25,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:25,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-06-05 03:54:25,360 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-06-05 03:54:25,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:25,360 INFO L482 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-06-05 03:54:25,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:25,361 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-06-05 03:54:25,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:25,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:25,368 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:25,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:25,568 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:25,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:25,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1162488683, now seen corresponding path program 276 times [2021-06-05 03:54:25,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:25,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107025166] [2021-06-05 03:54:25,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:25,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:25,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107025166] [2021-06-05 03:54:25,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107025166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:25,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80477359] [2021-06-05 03:54:25,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:25,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:54:25,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:25,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:25,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:25,842 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:25,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80477359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:25,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:25,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 03:54:25,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393584616] [2021-06-05 03:54:25,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:25,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:25,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:25,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:25,843 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:26,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:26,143 INFO L93 Difference]: Finished difference Result 7734 states and 23848 transitions. [2021-06-05 03:54:26,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:54:26,143 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:26,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:26,153 INFO L225 Difference]: With dead ends: 7734 [2021-06-05 03:54:26,153 INFO L226 Difference]: Without dead ends: 7727 [2021-06-05 03:54:26,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 249.8ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:54:26,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7727 states. [2021-06-05 03:54:26,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7727 to 7430. [2021-06-05 03:54:26,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:26,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-06-05 03:54:26,247 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-06-05 03:54:26,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:26,247 INFO L482 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-06-05 03:54:26,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:26,247 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-06-05 03:54:26,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:26,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:26,255 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:26,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:26,455 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:26,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:26,456 INFO L82 PathProgramCache]: Analyzing trace with hash -627258881, now seen corresponding path program 277 times [2021-06-05 03:54:26,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:26,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993323281] [2021-06-05 03:54:26,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:26,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:26,589 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:26,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:26,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993323281] [2021-06-05 03:54:26,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993323281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:26,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792731541] [2021-06-05 03:54:26,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:26,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:26,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:26,782 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:26,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792731541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:26,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:26,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 03:54:26,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102704090] [2021-06-05 03:54:26,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:26,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:26,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:26,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:26,783 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:27,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:27,129 INFO L93 Difference]: Finished difference Result 7751 states and 23873 transitions. [2021-06-05 03:54:27,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:54:27,130 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:27,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:27,141 INFO L225 Difference]: With dead ends: 7751 [2021-06-05 03:54:27,142 INFO L226 Difference]: Without dead ends: 7744 [2021-06-05 03:54:27,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 284.3ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:54:27,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7744 states. [2021-06-05 03:54:27,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7744 to 7430. [2021-06-05 03:54:27,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:27,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-06-05 03:54:27,271 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-06-05 03:54:27,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:27,271 INFO L482 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-06-05 03:54:27,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:27,271 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-06-05 03:54:27,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:27,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:27,280 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:27,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-05 03:54:27,481 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:27,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:27,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1215004203, now seen corresponding path program 278 times [2021-06-05 03:54:27,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:27,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215033521] [2021-06-05 03:54:27,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:27,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:27,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215033521] [2021-06-05 03:54:27,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215033521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:27,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103863967] [2021-06-05 03:54:27,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:27,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:27,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:27,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:27,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:27,788 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:27,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103863967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:27,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:27,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 03:54:27,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876100630] [2021-06-05 03:54:27,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:27,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:27,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:27,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:27,789 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:28,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:28,103 INFO L93 Difference]: Finished difference Result 7771 states and 23903 transitions. [2021-06-05 03:54:28,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:28,104 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:28,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:28,112 INFO L225 Difference]: With dead ends: 7771 [2021-06-05 03:54:28,113 INFO L226 Difference]: Without dead ends: 7764 [2021-06-05 03:54:28,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 295.2ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:54:28,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7764 states. [2021-06-05 03:54:28,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7764 to 7430. [2021-06-05 03:54:28,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:28,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-06-05 03:54:28,220 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-06-05 03:54:28,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:28,220 INFO L482 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-06-05 03:54:28,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:28,220 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-06-05 03:54:28,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:28,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:28,229 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:28,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:28,429 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:28,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:28,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2039727295, now seen corresponding path program 279 times [2021-06-05 03:54:28,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:28,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46055833] [2021-06-05 03:54:28,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:28,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:28,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46055833] [2021-06-05 03:54:28,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46055833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:28,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100443604] [2021-06-05 03:54:28,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:28,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:54:28,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:28,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:28,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:28,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100443604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:28,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:28,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 03:54:28,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375198412] [2021-06-05 03:54:28,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:28,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:28,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:28,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:28,795 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:29,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:29,182 INFO L93 Difference]: Finished difference Result 7671 states and 23732 transitions. [2021-06-05 03:54:29,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:54:29,182 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:29,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:29,191 INFO L225 Difference]: With dead ends: 7671 [2021-06-05 03:54:29,191 INFO L226 Difference]: Without dead ends: 7664 [2021-06-05 03:54:29,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 388.9ms TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:54:29,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7664 states. [2021-06-05 03:54:29,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7664 to 7430. [2021-06-05 03:54:29,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:29,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-06-05 03:54:29,301 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-06-05 03:54:29,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:29,301 INFO L482 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-06-05 03:54:29,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:29,301 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-06-05 03:54:29,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:29,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:29,310 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:29,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:29,511 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:29,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:29,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1090073861, now seen corresponding path program 280 times [2021-06-05 03:54:29,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:29,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702032576] [2021-06-05 03:54:29,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:29,646 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:29,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:29,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702032576] [2021-06-05 03:54:29,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702032576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:29,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658757505] [2021-06-05 03:54:29,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:29,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:29,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:29,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:29,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:29,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658757505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:29,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:29,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-05 03:54:29,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115555970] [2021-06-05 03:54:29,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:29,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:29,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:29,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:29,820 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:30,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:30,017 INFO L93 Difference]: Finished difference Result 7746 states and 24061 transitions. [2021-06-05 03:54:30,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:54:30,017 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:30,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:30,027 INFO L225 Difference]: With dead ends: 7746 [2021-06-05 03:54:30,027 INFO L226 Difference]: Without dead ends: 7739 [2021-06-05 03:54:30,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 264.3ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:54:30,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7739 states. [2021-06-05 03:54:30,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7739 to 7502. [2021-06-05 03:54:30,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7502 states, 7501 states have (on average 3.1463804826023196) internal successors, (23601), 7501 states have internal predecessors, (23601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:30,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 23601 transitions. [2021-06-05 03:54:30,133 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 23601 transitions. Word has length 23 [2021-06-05 03:54:30,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:30,133 INFO L482 AbstractCegarLoop]: Abstraction has 7502 states and 23601 transitions. [2021-06-05 03:54:30,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:30,133 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 23601 transitions. [2021-06-05 03:54:30,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:30,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:30,142 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:30,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-06-05 03:54:30,343 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:30,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:30,343 INFO L82 PathProgramCache]: Analyzing trace with hash 524628863, now seen corresponding path program 281 times [2021-06-05 03:54:30,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:30,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210510008] [2021-06-05 03:54:30,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:30,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:30,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210510008] [2021-06-05 03:54:30,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210510008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:30,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899493340] [2021-06-05 03:54:30,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:30,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:54:30,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:30,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:30,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:30,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899493340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:30,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:30,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 03:54:30,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488967573] [2021-06-05 03:54:30,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:54:30,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:30,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:54:30,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:30,685 INFO L87 Difference]: Start difference. First operand 7502 states and 23601 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:30,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:30,893 INFO L93 Difference]: Finished difference Result 7747 states and 24058 transitions. [2021-06-05 03:54:30,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:54:30,893 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:30,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:30,901 INFO L225 Difference]: With dead ends: 7747 [2021-06-05 03:54:30,901 INFO L226 Difference]: Without dead ends: 7738 [2021-06-05 03:54:30,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 286.3ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:54:30,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7738 states. [2021-06-05 03:54:31,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7738 to 7502. [2021-06-05 03:54:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7502 states, 7501 states have (on average 3.1457139048126916) internal successors, (23596), 7501 states have internal predecessors, (23596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:31,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 23596 transitions. [2021-06-05 03:54:31,023 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 23596 transitions. Word has length 23 [2021-06-05 03:54:31,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:31,023 INFO L482 AbstractCegarLoop]: Abstraction has 7502 states and 23596 transitions. [2021-06-05 03:54:31,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:31,024 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 23596 transitions. [2021-06-05 03:54:31,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:31,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:31,032 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:31,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 03:54:31,232 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:31,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:31,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1554664965, now seen corresponding path program 282 times [2021-06-05 03:54:31,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:31,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142825176] [2021-06-05 03:54:31,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:31,352 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:31,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:31,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142825176] [2021-06-05 03:54:31,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142825176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:31,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208688357] [2021-06-05 03:54:31,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:31,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 03:54:31,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:31,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:31,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:31,542 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:31,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208688357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:31,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:31,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-05 03:54:31,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132752057] [2021-06-05 03:54:31,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:31,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:31,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:31,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:31,543 INFO L87 Difference]: Start difference. First operand 7502 states and 23596 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:31,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:31,748 INFO L93 Difference]: Finished difference Result 7686 states and 23919 transitions. [2021-06-05 03:54:31,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:54:31,749 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:31,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:31,757 INFO L225 Difference]: With dead ends: 7686 [2021-06-05 03:54:31,757 INFO L226 Difference]: Without dead ends: 7679 [2021-06-05 03:54:31,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 269.3ms TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:54:31,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7679 states. [2021-06-05 03:54:31,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7679 to 7502. [2021-06-05 03:54:31,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7502 states, 7501 states have (on average 3.1457139048126916) internal successors, (23596), 7501 states have internal predecessors, (23596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:31,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 23596 transitions. [2021-06-05 03:54:31,860 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 23596 transitions. Word has length 23 [2021-06-05 03:54:31,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:31,860 INFO L482 AbstractCegarLoop]: Abstraction has 7502 states and 23596 transitions. [2021-06-05 03:54:31,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:31,860 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 23596 transitions. [2021-06-05 03:54:31,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:31,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:31,869 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:32,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:32,070 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:32,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:32,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1690015423, now seen corresponding path program 283 times [2021-06-05 03:54:32,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:32,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677267835] [2021-06-05 03:54:32,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:32,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:32,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677267835] [2021-06-05 03:54:32,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677267835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:32,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933551230] [2021-06-05 03:54:32,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:32,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:32,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:32,386 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:32,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933551230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:32,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:32,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-05 03:54:32,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712859401] [2021-06-05 03:54:32,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:54:32,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:32,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:54:32,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:32,387 INFO L87 Difference]: Start difference. First operand 7502 states and 23596 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:32,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:32,655 INFO L93 Difference]: Finished difference Result 8082 states and 25035 transitions. [2021-06-05 03:54:32,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:54:32,655 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:32,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:32,666 INFO L225 Difference]: With dead ends: 8082 [2021-06-05 03:54:32,666 INFO L226 Difference]: Without dead ends: 8065 [2021-06-05 03:54:32,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 295.8ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:54:32,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8065 states. [2021-06-05 03:54:32,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8065 to 7691. [2021-06-05 03:54:32,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7691 states, 7690 states have (on average 3.15370611183355) internal successors, (24252), 7690 states have internal predecessors, (24252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:32,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7691 states to 7691 states and 24252 transitions. [2021-06-05 03:54:32,769 INFO L78 Accepts]: Start accepts. Automaton has 7691 states and 24252 transitions. Word has length 23 [2021-06-05 03:54:32,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:32,769 INFO L482 AbstractCegarLoop]: Abstraction has 7691 states and 24252 transitions. [2021-06-05 03:54:32,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:32,769 INFO L276 IsEmpty]: Start isEmpty. Operand 7691 states and 24252 transitions. [2021-06-05 03:54:32,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:32,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:32,779 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:32,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:32,993 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:32,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:32,993 INFO L82 PathProgramCache]: Analyzing trace with hash -990249149, now seen corresponding path program 284 times [2021-06-05 03:54:32,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:32,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525090242] [2021-06-05 03:54:32,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:33,127 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:33,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:33,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525090242] [2021-06-05 03:54:33,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525090242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:33,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865817594] [2021-06-05 03:54:33,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:33,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:33,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:33,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:33,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:33,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865817594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:33,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:33,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 03:54:33,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020634637] [2021-06-05 03:54:33,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:33,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:33,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:33,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:33,279 INFO L87 Difference]: Start difference. First operand 7691 states and 24252 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:33,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:33,542 INFO L93 Difference]: Finished difference Result 8086 states and 25005 transitions. [2021-06-05 03:54:33,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:54:33,543 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:33,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:33,551 INFO L225 Difference]: With dead ends: 8086 [2021-06-05 03:54:33,552 INFO L226 Difference]: Without dead ends: 8068 [2021-06-05 03:54:33,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 270.6ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:54:33,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8068 states. [2021-06-05 03:54:33,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8068 to 7641. [2021-06-05 03:54:33,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7641 states, 7640 states have (on average 3.148167539267016) internal successors, (24052), 7640 states have internal predecessors, (24052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:33,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7641 states to 7641 states and 24052 transitions. [2021-06-05 03:54:33,658 INFO L78 Accepts]: Start accepts. Automaton has 7641 states and 24052 transitions. Word has length 23 [2021-06-05 03:54:33,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:33,658 INFO L482 AbstractCegarLoop]: Abstraction has 7641 states and 24052 transitions. [2021-06-05 03:54:33,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:33,658 INFO L276 IsEmpty]: Start isEmpty. Operand 7641 states and 24052 transitions. [2021-06-05 03:54:33,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:33,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:33,667 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:33,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-06-05 03:54:33,867 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:33,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:33,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1225424319, now seen corresponding path program 285 times [2021-06-05 03:54:33,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:33,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112313338] [2021-06-05 03:54:33,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:33,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:33,984 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:33,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:33,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112313338] [2021-06-05 03:54:33,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112313338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:33,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410074043] [2021-06-05 03:54:33,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:34,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 03:54:34,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:34,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:34,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:34,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410074043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:34,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:34,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 03:54:34,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903842444] [2021-06-05 03:54:34,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:34,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:34,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:34,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:34,154 INFO L87 Difference]: Start difference. First operand 7641 states and 24052 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:34,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:34,436 INFO L93 Difference]: Finished difference Result 7976 states and 24675 transitions. [2021-06-05 03:54:34,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:54:34,436 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:34,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:34,447 INFO L225 Difference]: With dead ends: 7976 [2021-06-05 03:54:34,447 INFO L226 Difference]: Without dead ends: 7954 [2021-06-05 03:54:34,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 289.5ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:54:34,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7954 states. [2021-06-05 03:54:34,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7954 to 7625. [2021-06-05 03:54:34,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7625 states, 7624 states have (on average 3.147560335781742) internal successors, (23997), 7624 states have internal predecessors, (23997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:34,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7625 states to 7625 states and 23997 transitions. [2021-06-05 03:54:34,555 INFO L78 Accepts]: Start accepts. Automaton has 7625 states and 23997 transitions. Word has length 23 [2021-06-05 03:54:34,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:34,555 INFO L482 AbstractCegarLoop]: Abstraction has 7625 states and 23997 transitions. [2021-06-05 03:54:34,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:34,556 INFO L276 IsEmpty]: Start isEmpty. Operand 7625 states and 23997 transitions. [2021-06-05 03:54:34,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:34,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:34,564 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:34,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:34,764 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:34,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:34,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1191825091, now seen corresponding path program 286 times [2021-06-05 03:54:34,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:34,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850178289] [2021-06-05 03:54:34,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:34,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:34,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850178289] [2021-06-05 03:54:34,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850178289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:34,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914309793] [2021-06-05 03:54:34,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:54:34,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:34,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:34,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:34,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:35,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914309793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:35,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:35,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 03:54:35,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034298828] [2021-06-05 03:54:35,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:35,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:35,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:35,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:35,075 INFO L87 Difference]: Start difference. First operand 7625 states and 23997 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:35,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:35,334 INFO L93 Difference]: Finished difference Result 7875 states and 24443 transitions. [2021-06-05 03:54:35,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:54:35,334 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:35,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:35,344 INFO L225 Difference]: With dead ends: 7875 [2021-06-05 03:54:35,344 INFO L226 Difference]: Without dead ends: 7868 [2021-06-05 03:54:35,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 285.6ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:54:35,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7868 states. [2021-06-05 03:54:35,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7868 to 7625. [2021-06-05 03:54:35,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7625 states, 7624 states have (on average 3.147560335781742) internal successors, (23997), 7624 states have internal predecessors, (23997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:35,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7625 states to 7625 states and 23997 transitions. [2021-06-05 03:54:35,465 INFO L78 Accepts]: Start accepts. Automaton has 7625 states and 23997 transitions. Word has length 23 [2021-06-05 03:54:35,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:35,465 INFO L482 AbstractCegarLoop]: Abstraction has 7625 states and 23997 transitions. [2021-06-05 03:54:35,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:35,465 INFO L276 IsEmpty]: Start isEmpty. Operand 7625 states and 23997 transitions. [2021-06-05 03:54:35,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:35,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:35,474 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:35,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable493 [2021-06-05 03:54:35,674 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:35,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:35,675 INFO L82 PathProgramCache]: Analyzing trace with hash -2075509483, now seen corresponding path program 287 times [2021-06-05 03:54:35,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:35,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131376699] [2021-06-05 03:54:35,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:35,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:35,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131376699] [2021-06-05 03:54:35,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131376699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:35,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456059333] [2021-06-05 03:54:35,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:35,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 03:54:35,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:35,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:35,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:35,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456059333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:35,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:35,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-05 03:54:35,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862312619] [2021-06-05 03:54:35,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:35,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:35,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:35,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:35,955 INFO L87 Difference]: Start difference. First operand 7625 states and 23997 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:36,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:36,164 INFO L93 Difference]: Finished difference Result 7842 states and 24373 transitions. [2021-06-05 03:54:36,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:54:36,165 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:36,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:36,175 INFO L225 Difference]: With dead ends: 7842 [2021-06-05 03:54:36,175 INFO L226 Difference]: Without dead ends: 7829 [2021-06-05 03:54:36,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 253.6ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:54:36,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7829 states. [2021-06-05 03:54:36,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7829 to 7608. [2021-06-05 03:54:36,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7608 states, 7607 states have (on average 3.1456553174707507) internal successors, (23929), 7607 states have internal predecessors, (23929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7608 states to 7608 states and 23929 transitions. [2021-06-05 03:54:36,286 INFO L78 Accepts]: Start accepts. Automaton has 7608 states and 23929 transitions. Word has length 23 [2021-06-05 03:54:36,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:36,286 INFO L482 AbstractCegarLoop]: Abstraction has 7608 states and 23929 transitions. [2021-06-05 03:54:36,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:36,287 INFO L276 IsEmpty]: Start isEmpty. Operand 7608 states and 23929 transitions. [2021-06-05 03:54:36,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:36,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:36,296 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:36,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-05 03:54:36,496 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:36,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:36,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1973437307, now seen corresponding path program 288 times [2021-06-05 03:54:36,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:36,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413700873] [2021-06-05 03:54:36,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:36,617 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:36,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:36,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413700873] [2021-06-05 03:54:36,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413700873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:36,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535667321] [2021-06-05 03:54:36,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:36,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:54:36,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:36,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:36,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:36,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535667321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:36,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:36,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-06-05 03:54:36,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774052634] [2021-06-05 03:54:36,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:54:36,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:36,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:54:36,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:36,787 INFO L87 Difference]: Start difference. First operand 7608 states and 23929 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:37,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:37,091 INFO L93 Difference]: Finished difference Result 8242 states and 25517 transitions. [2021-06-05 03:54:37,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:54:37,091 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:37,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:37,103 INFO L225 Difference]: With dead ends: 8242 [2021-06-05 03:54:37,103 INFO L226 Difference]: Without dead ends: 8225 [2021-06-05 03:54:37,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 276.2ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:54:37,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8225 states. [2021-06-05 03:54:37,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8225 to 7836. [2021-06-05 03:54:37,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7836 states, 7835 states have (on average 3.1537970644543716) internal successors, (24710), 7835 states have internal predecessors, (24710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:37,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7836 states to 7836 states and 24710 transitions. [2021-06-05 03:54:37,226 INFO L78 Accepts]: Start accepts. Automaton has 7836 states and 24710 transitions. Word has length 23 [2021-06-05 03:54:37,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:37,226 INFO L482 AbstractCegarLoop]: Abstraction has 7836 states and 24710 transitions. [2021-06-05 03:54:37,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:37,226 INFO L276 IsEmpty]: Start isEmpty. Operand 7836 states and 24710 transitions. [2021-06-05 03:54:37,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:37,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:37,236 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:37,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 03:54:37,436 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:37,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:37,436 INFO L82 PathProgramCache]: Analyzing trace with hash -706827265, now seen corresponding path program 289 times [2021-06-05 03:54:37,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:37,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148542870] [2021-06-05 03:54:37,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:37,568 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:37,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:37,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148542870] [2021-06-05 03:54:37,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148542870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:37,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974949105] [2021-06-05 03:54:37,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:37,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:37,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:37,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:37,786 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:37,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974949105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:37,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:37,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-05 03:54:37,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927541307] [2021-06-05 03:54:37,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:37,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:37,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:37,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:37,787 INFO L87 Difference]: Start difference. First operand 7836 states and 24710 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:38,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:38,045 INFO L93 Difference]: Finished difference Result 8244 states and 25471 transitions. [2021-06-05 03:54:38,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:54:38,045 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:38,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:38,054 INFO L225 Difference]: With dead ends: 8244 [2021-06-05 03:54:38,055 INFO L226 Difference]: Without dead ends: 8226 [2021-06-05 03:54:38,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 309.4ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:54:38,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8226 states. [2021-06-05 03:54:38,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8226 to 7776. [2021-06-05 03:54:38,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7776 states, 7775 states have (on average 3.1481672025723473) internal successors, (24477), 7775 states have internal predecessors, (24477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:38,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7776 states to 7776 states and 24477 transitions. [2021-06-05 03:54:38,152 INFO L78 Accepts]: Start accepts. Automaton has 7776 states and 24477 transitions. Word has length 23 [2021-06-05 03:54:38,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:38,152 INFO L482 AbstractCegarLoop]: Abstraction has 7776 states and 24477 transitions. [2021-06-05 03:54:38,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:38,153 INFO L276 IsEmpty]: Start isEmpty. Operand 7776 states and 24477 transitions. [2021-06-05 03:54:38,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:38,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:38,161 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:38,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable502,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:38,361 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:38,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:38,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1508846203, now seen corresponding path program 290 times [2021-06-05 03:54:38,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:38,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801064258] [2021-06-05 03:54:38,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:38,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:38,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801064258] [2021-06-05 03:54:38,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801064258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:38,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991683621] [2021-06-05 03:54:38,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:38,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:38,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:38,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:38,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:38,629 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:38,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991683621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:38,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:38,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-05 03:54:38,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685415484] [2021-06-05 03:54:38,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:38,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:38,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:38,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:38,630 INFO L87 Difference]: Start difference. First operand 7776 states and 24477 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:38,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:38,933 INFO L93 Difference]: Finished difference Result 8185 states and 25224 transitions. [2021-06-05 03:54:38,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:54:38,934 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:38,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:38,945 INFO L225 Difference]: With dead ends: 8185 [2021-06-05 03:54:38,945 INFO L226 Difference]: Without dead ends: 8163 [2021-06-05 03:54:38,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 268.8ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:54:38,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8163 states. [2021-06-05 03:54:39,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8163 to 7750. [2021-06-05 03:54:39,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7750 states, 7749 states have (on average 3.145438121047877) internal successors, (24374), 7749 states have internal predecessors, (24374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:39,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7750 states to 7750 states and 24374 transitions. [2021-06-05 03:54:39,057 INFO L78 Accepts]: Start accepts. Automaton has 7750 states and 24374 transitions. Word has length 23 [2021-06-05 03:54:39,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:39,057 INFO L482 AbstractCegarLoop]: Abstraction has 7750 states and 24374 transitions. [2021-06-05 03:54:39,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:39,057 INFO L276 IsEmpty]: Start isEmpty. Operand 7750 states and 24374 transitions. [2021-06-05 03:54:39,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:39,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:39,065 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:39,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:39,266 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:39,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:39,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1475246975, now seen corresponding path program 291 times [2021-06-05 03:54:39,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:39,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173264464] [2021-06-05 03:54:39,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:39,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:39,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173264464] [2021-06-05 03:54:39,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173264464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:39,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491439445] [2021-06-05 03:54:39,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:39,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 03:54:39,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:39,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:39,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:39,579 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:39,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491439445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:39,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:39,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-05 03:54:39,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833230894] [2021-06-05 03:54:39,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:39,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:39,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:39,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:39,580 INFO L87 Difference]: Start difference. First operand 7750 states and 24374 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:39,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:39,929 INFO L93 Difference]: Finished difference Result 8091 states and 24993 transitions. [2021-06-05 03:54:39,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:54:39,929 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:39,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:39,938 INFO L225 Difference]: With dead ends: 8091 [2021-06-05 03:54:39,939 INFO L226 Difference]: Without dead ends: 8065 [2021-06-05 03:54:39,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 310.9ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:54:39,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8065 states. [2021-06-05 03:54:40,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8065 to 7731. [2021-06-05 03:54:40,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7731 states, 7730 states have (on average 3.144890038809832) internal successors, (24310), 7730 states have internal predecessors, (24310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:40,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7731 states to 7731 states and 24310 transitions. [2021-06-05 03:54:40,072 INFO L78 Accepts]: Start accepts. Automaton has 7731 states and 24310 transitions. Word has length 23 [2021-06-05 03:54:40,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:40,072 INFO L482 AbstractCegarLoop]: Abstraction has 7731 states and 24310 transitions. [2021-06-05 03:54:40,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:40,072 INFO L276 IsEmpty]: Start isEmpty. Operand 7731 states and 24310 transitions. [2021-06-05 03:54:40,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:40,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:40,082 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:40,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:40,282 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:40,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:40,283 INFO L82 PathProgramCache]: Analyzing trace with hash 433670907, now seen corresponding path program 292 times [2021-06-05 03:54:40,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:40,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478759439] [2021-06-05 03:54:40,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:40,418 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:40,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:40,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478759439] [2021-06-05 03:54:40,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478759439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:40,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141602401] [2021-06-05 03:54:40,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:40,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:40,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:40,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:40,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:40,581 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:40,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141602401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:40,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:40,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-05 03:54:40,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769639846] [2021-06-05 03:54:40,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:40,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:40,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:40,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:40,582 INFO L87 Difference]: Start difference. First operand 7731 states and 24310 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:40,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:40,877 INFO L93 Difference]: Finished difference Result 7972 states and 24730 transitions. [2021-06-05 03:54:40,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:54:40,877 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:40,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:40,887 INFO L225 Difference]: With dead ends: 7972 [2021-06-05 03:54:40,887 INFO L226 Difference]: Without dead ends: 7965 [2021-06-05 03:54:40,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 289.1ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:54:40,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7965 states. [2021-06-05 03:54:40,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7965 to 7731. [2021-06-05 03:54:40,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7731 states, 7730 states have (on average 3.144890038809832) internal successors, (24310), 7730 states have internal predecessors, (24310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:40,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7731 states to 7731 states and 24310 transitions. [2021-06-05 03:54:40,996 INFO L78 Accepts]: Start accepts. Automaton has 7731 states and 24310 transitions. Word has length 23 [2021-06-05 03:54:40,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:40,996 INFO L482 AbstractCegarLoop]: Abstraction has 7731 states and 24310 transitions. [2021-06-05 03:54:40,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:40,996 INFO L276 IsEmpty]: Start isEmpty. Operand 7731 states and 24310 transitions. [2021-06-05 03:54:41,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:41,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:41,005 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:41,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-06-05 03:54:41,205 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:41,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:41,206 INFO L82 PathProgramCache]: Analyzing trace with hash -906289319, now seen corresponding path program 293 times [2021-06-05 03:54:41,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:41,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504782623] [2021-06-05 03:54:41,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:41,322 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:41,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:41,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504782623] [2021-06-05 03:54:41,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504782623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:41,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723433716] [2021-06-05 03:54:41,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:41,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:54:41,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:41,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:41,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:41,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723433716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:41,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:41,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-05 03:54:41,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076539193] [2021-06-05 03:54:41,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:41,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:41,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:41,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:41,505 INFO L87 Difference]: Start difference. First operand 7731 states and 24310 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:41,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:41,698 INFO L93 Difference]: Finished difference Result 7915 states and 24623 transitions. [2021-06-05 03:54:41,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:54:41,699 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:41,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:41,709 INFO L225 Difference]: With dead ends: 7915 [2021-06-05 03:54:41,709 INFO L226 Difference]: Without dead ends: 7902 [2021-06-05 03:54:41,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 245.2ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:54:41,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7902 states. [2021-06-05 03:54:41,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7902 to 7707. [2021-06-05 03:54:41,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7707 states, 7706 states have (on average 3.1418375291980274) internal successors, (24211), 7706 states have internal predecessors, (24211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:41,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7707 states to 7707 states and 24211 transitions. [2021-06-05 03:54:41,807 INFO L78 Accepts]: Start accepts. Automaton has 7707 states and 24211 transitions. Word has length 23 [2021-06-05 03:54:41,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:41,807 INFO L482 AbstractCegarLoop]: Abstraction has 7707 states and 24211 transitions. [2021-06-05 03:54:41,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:41,807 INFO L276 IsEmpty]: Start isEmpty. Operand 7707 states and 24211 transitions. [2021-06-05 03:54:41,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:41,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:41,815 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:42,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-06-05 03:54:42,016 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:42,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:42,016 INFO L82 PathProgramCache]: Analyzing trace with hash -2125386177, now seen corresponding path program 294 times [2021-06-05 03:54:42,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:42,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117738547] [2021-06-05 03:54:42,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:42,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:42,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117738547] [2021-06-05 03:54:42,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117738547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:42,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484658903] [2021-06-05 03:54:42,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:42,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:54:42,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:42,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:42,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:42,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484658903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:42,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:42,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2021-06-05 03:54:42,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255657466] [2021-06-05 03:54:42,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:54:42,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:42,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:54:42,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:42,288 INFO L87 Difference]: Start difference. First operand 7707 states and 24211 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:42,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:42,608 INFO L93 Difference]: Finished difference Result 8283 states and 25598 transitions. [2021-06-05 03:54:42,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:54:42,609 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:42,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:42,619 INFO L225 Difference]: With dead ends: 8283 [2021-06-05 03:54:42,620 INFO L226 Difference]: Without dead ends: 8266 [2021-06-05 03:54:42,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 279.3ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:54:42,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8266 states. [2021-06-05 03:54:42,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8266 to 7931. [2021-06-05 03:54:42,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7931 states, 7930 states have (on average 3.1479192938209333) internal successors, (24963), 7930 states have internal predecessors, (24963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:42,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7931 states to 7931 states and 24963 transitions. [2021-06-05 03:54:42,728 INFO L78 Accepts]: Start accepts. Automaton has 7931 states and 24963 transitions. Word has length 23 [2021-06-05 03:54:42,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:42,728 INFO L482 AbstractCegarLoop]: Abstraction has 7931 states and 24963 transitions. [2021-06-05 03:54:42,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:42,728 INFO L276 IsEmpty]: Start isEmpty. Operand 7931 states and 24963 transitions. [2021-06-05 03:54:42,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:42,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:42,737 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:42,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:42,938 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:42,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:42,938 INFO L82 PathProgramCache]: Analyzing trace with hash -510683453, now seen corresponding path program 295 times [2021-06-05 03:54:42,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:42,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045364539] [2021-06-05 03:54:42,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:43,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:43,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045364539] [2021-06-05 03:54:43,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045364539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:43,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667012245] [2021-06-05 03:54:43,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:43,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:43,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:43,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:43,203 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:43,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667012245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:43,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:43,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-05 03:54:43,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355635075] [2021-06-05 03:54:43,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:43,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:43,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:43,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:43,203 INFO L87 Difference]: Start difference. First operand 7931 states and 24963 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:43,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:43,514 INFO L93 Difference]: Finished difference Result 8281 states and 25535 transitions. [2021-06-05 03:54:43,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:54:43,514 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:43,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:43,526 INFO L225 Difference]: With dead ends: 8281 [2021-06-05 03:54:43,526 INFO L226 Difference]: Without dead ends: 8263 [2021-06-05 03:54:43,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 253.4ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:54:43,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8263 states. [2021-06-05 03:54:43,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8263 to 7865. [2021-06-05 03:54:43,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7865 states, 7864 states have (on average 3.1434384537131232) internal successors, (24720), 7864 states have internal predecessors, (24720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:43,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7865 states to 7865 states and 24720 transitions. [2021-06-05 03:54:43,639 INFO L78 Accepts]: Start accepts. Automaton has 7865 states and 24720 transitions. Word has length 23 [2021-06-05 03:54:43,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:43,639 INFO L482 AbstractCegarLoop]: Abstraction has 7865 states and 24720 transitions. [2021-06-05 03:54:43,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:43,639 INFO L276 IsEmpty]: Start isEmpty. Operand 7865 states and 24720 transitions. [2021-06-05 03:54:43,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:43,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:43,647 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:43,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-06-05 03:54:43,847 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:43,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:43,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1704990015, now seen corresponding path program 296 times [2021-06-05 03:54:43,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:43,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102751963] [2021-06-05 03:54:43,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:43,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:43,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102751963] [2021-06-05 03:54:43,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102751963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:43,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895831616] [2021-06-05 03:54:43,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:43,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:43,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:43,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:43,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:44,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895831616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:44,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:44,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-05 03:54:44,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766057264] [2021-06-05 03:54:44,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:44,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:44,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:44,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:44,101 INFO L87 Difference]: Start difference. First operand 7865 states and 24720 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:44,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:44,432 INFO L93 Difference]: Finished difference Result 8238 states and 25326 transitions. [2021-06-05 03:54:44,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:54:44,433 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:44,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:44,443 INFO L225 Difference]: With dead ends: 8238 [2021-06-05 03:54:44,443 INFO L226 Difference]: Without dead ends: 8216 [2021-06-05 03:54:44,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 258.4ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:54:44,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8216 states. [2021-06-05 03:54:44,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8216 to 7840. [2021-06-05 03:54:44,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7840 states, 7839 states have (on average 3.1408342900880215) internal successors, (24621), 7839 states have internal predecessors, (24621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:44,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7840 states to 7840 states and 24621 transitions. [2021-06-05 03:54:44,556 INFO L78 Accepts]: Start accepts. Automaton has 7840 states and 24621 transitions. Word has length 23 [2021-06-05 03:54:44,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:44,556 INFO L482 AbstractCegarLoop]: Abstraction has 7840 states and 24621 transitions. [2021-06-05 03:54:44,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:44,556 INFO L276 IsEmpty]: Start isEmpty. Operand 7840 states and 24621 transitions. [2021-06-05 03:54:44,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:44,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:44,566 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:44,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2021-06-05 03:54:44,766 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:44,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:44,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1671390787, now seen corresponding path program 297 times [2021-06-05 03:54:44,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:44,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991754270] [2021-06-05 03:54:44,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:44,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:44,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991754270] [2021-06-05 03:54:44,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991754270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:44,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396877973] [2021-06-05 03:54:44,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:44,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:54:44,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:44,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:44,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:45,061 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:45,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396877973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:45,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:45,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-05 03:54:45,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762610642] [2021-06-05 03:54:45,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:45,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:45,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:45,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:45,062 INFO L87 Difference]: Start difference. First operand 7840 states and 24621 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:45,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:45,405 INFO L93 Difference]: Finished difference Result 8244 states and 25274 transitions. [2021-06-05 03:54:45,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:54:45,405 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:45,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:45,415 INFO L225 Difference]: With dead ends: 8244 [2021-06-05 03:54:45,415 INFO L226 Difference]: Without dead ends: 8218 [2021-06-05 03:54:45,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 276.4ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:54:45,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8218 states. [2021-06-05 03:54:45,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8218 to 7816. [2021-06-05 03:54:45,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7816 states, 7815 states have (on average 3.1396033269353807) internal successors, (24536), 7815 states have internal predecessors, (24536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:45,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7816 states to 7816 states and 24536 transitions. [2021-06-05 03:54:45,528 INFO L78 Accepts]: Start accepts. Automaton has 7816 states and 24536 transitions. Word has length 23 [2021-06-05 03:54:45,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:45,528 INFO L482 AbstractCegarLoop]: Abstraction has 7816 states and 24536 transitions. [2021-06-05 03:54:45,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:45,529 INFO L276 IsEmpty]: Start isEmpty. Operand 7816 states and 24536 transitions. [2021-06-05 03:54:45,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:45,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:45,538 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:45,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:45,739 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:45,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:45,739 INFO L82 PathProgramCache]: Analyzing trace with hash 629814719, now seen corresponding path program 298 times [2021-06-05 03:54:45,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:45,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196029651] [2021-06-05 03:54:45,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:45,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:45,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:45,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196029651] [2021-06-05 03:54:45,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196029651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:45,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519683100] [2021-06-05 03:54:45,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:45,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:45,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:45,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:45,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:46,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519683100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:46,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:46,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-05 03:54:46,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576531190] [2021-06-05 03:54:46,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:46,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:46,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:46,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:46,013 INFO L87 Difference]: Start difference. First operand 7816 states and 24536 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:46,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:46,395 INFO L93 Difference]: Finished difference Result 8147 states and 25070 transitions. [2021-06-05 03:54:46,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:46,395 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:46,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:46,406 INFO L225 Difference]: With dead ends: 8147 [2021-06-05 03:54:46,406 INFO L226 Difference]: Without dead ends: 8117 [2021-06-05 03:54:46,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 289.9ms TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:54:46,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-06-05 03:54:46,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 7795. [2021-06-05 03:54:46,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7795 states, 7794 states have (on average 3.1395945599178856) internal successors, (24470), 7794 states have internal predecessors, (24470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:46,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7795 states to 7795 states and 24470 transitions. [2021-06-05 03:54:46,518 INFO L78 Accepts]: Start accepts. Automaton has 7795 states and 24470 transitions. Word has length 23 [2021-06-05 03:54:46,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:46,519 INFO L482 AbstractCegarLoop]: Abstraction has 7795 states and 24470 transitions. [2021-06-05 03:54:46,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:46,519 INFO L276 IsEmpty]: Start isEmpty. Operand 7795 states and 24470 transitions. [2021-06-05 03:54:46,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:46,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:46,527 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:46,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:46,728 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:46,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:46,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1594272317, now seen corresponding path program 299 times [2021-06-05 03:54:46,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:46,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151717769] [2021-06-05 03:54:46,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:46,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:46,854 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:46,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:46,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151717769] [2021-06-05 03:54:46,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151717769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:46,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384990327] [2021-06-05 03:54:46,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:46,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:54:46,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:46,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:46,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:47,003 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:47,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384990327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:47,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:47,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-05 03:54:47,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827235247] [2021-06-05 03:54:47,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:47,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:47,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:47,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:47,004 INFO L87 Difference]: Start difference. First operand 7795 states and 24470 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:47,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:47,396 INFO L93 Difference]: Finished difference Result 8028 states and 24837 transitions. [2021-06-05 03:54:47,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:54:47,396 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:47,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:47,407 INFO L225 Difference]: With dead ends: 8028 [2021-06-05 03:54:47,408 INFO L226 Difference]: Without dead ends: 8021 [2021-06-05 03:54:47,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 289.3ms TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:54:47,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8021 states. [2021-06-05 03:54:47,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8021 to 7797. [2021-06-05 03:54:47,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7797 states, 7796 states have (on average 3.1391739353514625) internal successors, (24473), 7796 states have internal predecessors, (24473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:47,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7797 states to 7797 states and 24473 transitions. [2021-06-05 03:54:47,555 INFO L78 Accepts]: Start accepts. Automaton has 7797 states and 24473 transitions. Word has length 23 [2021-06-05 03:54:47,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:47,555 INFO L482 AbstractCegarLoop]: Abstraction has 7797 states and 24473 transitions. [2021-06-05 03:54:47,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:47,555 INFO L276 IsEmpty]: Start isEmpty. Operand 7797 states and 24473 transitions. [2021-06-05 03:54:47,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:47,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:47,565 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:47,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-05 03:54:47,765 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:47,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:47,765 INFO L82 PathProgramCache]: Analyzing trace with hash 979797397, now seen corresponding path program 300 times [2021-06-05 03:54:47,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:47,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64404795] [2021-06-05 03:54:47,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:47,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:47,895 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:47,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:47,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64404795] [2021-06-05 03:54:47,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64404795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:47,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616989014] [2021-06-05 03:54:47,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:47,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:54:47,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:47,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:47,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:48,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616989014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:48,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:48,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-05 03:54:48,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448406538] [2021-06-05 03:54:48,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:48,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:48,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:48,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:48,060 INFO L87 Difference]: Start difference. First operand 7797 states and 24473 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:48,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:48,271 INFO L93 Difference]: Finished difference Result 7916 states and 24667 transitions. [2021-06-05 03:54:48,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:54:48,271 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:48,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:48,281 INFO L225 Difference]: With dead ends: 7916 [2021-06-05 03:54:48,281 INFO L226 Difference]: Without dead ends: 7903 [2021-06-05 03:54:48,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 266.5ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:54:48,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7903 states. [2021-06-05 03:54:48,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7903 to 7773. [2021-06-05 03:54:48,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7773 states, 7772 states have (on average 3.139475038600103) internal successors, (24400), 7772 states have internal predecessors, (24400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:48,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7773 states to 7773 states and 24400 transitions. [2021-06-05 03:54:48,385 INFO L78 Accepts]: Start accepts. Automaton has 7773 states and 24400 transitions. Word has length 23 [2021-06-05 03:54:48,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:48,386 INFO L482 AbstractCegarLoop]: Abstraction has 7773 states and 24400 transitions. [2021-06-05 03:54:48,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:48,386 INFO L276 IsEmpty]: Start isEmpty. Operand 7773 states and 24400 transitions. [2021-06-05 03:54:48,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:48,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:48,394 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:48,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-06-05 03:54:48,595 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:48,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:48,595 INFO L82 PathProgramCache]: Analyzing trace with hash -339895301, now seen corresponding path program 301 times [2021-06-05 03:54:48,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:48,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120352845] [2021-06-05 03:54:48,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:48,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:48,719 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:48,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:48,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120352845] [2021-06-05 03:54:48,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120352845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:48,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744779927] [2021-06-05 03:54:48,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:48,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:48,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:48,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744779927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:48,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:48,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 03:54:48,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800371381] [2021-06-05 03:54:48,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:54:48,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:48,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:54:48,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:48,889 INFO L87 Difference]: Start difference. First operand 7773 states and 24400 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:49,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:49,201 INFO L93 Difference]: Finished difference Result 8383 states and 25880 transitions. [2021-06-05 03:54:49,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:54:49,202 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:49,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:49,213 INFO L225 Difference]: With dead ends: 8383 [2021-06-05 03:54:49,213 INFO L226 Difference]: Without dead ends: 8366 [2021-06-05 03:54:49,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 279.7ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:54:49,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8366 states. [2021-06-05 03:54:49,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8366 to 8073. [2021-06-05 03:54:49,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8073 states, 8072 states have (on average 3.1385034687809714) internal successors, (25334), 8072 states have internal predecessors, (25334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:49,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8073 states to 8073 states and 25334 transitions. [2021-06-05 03:54:49,330 INFO L78 Accepts]: Start accepts. Automaton has 8073 states and 25334 transitions. Word has length 23 [2021-06-05 03:54:49,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:49,330 INFO L482 AbstractCegarLoop]: Abstraction has 8073 states and 25334 transitions. [2021-06-05 03:54:49,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:49,330 INFO L276 IsEmpty]: Start isEmpty. Operand 8073 states and 25334 transitions. [2021-06-05 03:54:49,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:49,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:49,339 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:49,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable538 [2021-06-05 03:54:49,540 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:49,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:49,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1274807423, now seen corresponding path program 302 times [2021-06-05 03:54:49,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:49,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854509000] [2021-06-05 03:54:49,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:49,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:49,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:49,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854509000] [2021-06-05 03:54:49,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854509000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:49,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965681242] [2021-06-05 03:54:49,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:49,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:49,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:49,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:49,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:49,805 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:49,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965681242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:49,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:49,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 03:54:49,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211757880] [2021-06-05 03:54:49,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:49,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:49,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:49,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:49,806 INFO L87 Difference]: Start difference. First operand 8073 states and 25334 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:50,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:50,098 INFO L93 Difference]: Finished difference Result 8381 states and 25825 transitions. [2021-06-05 03:54:50,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:54:50,099 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:50,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:50,109 INFO L225 Difference]: With dead ends: 8381 [2021-06-05 03:54:50,109 INFO L226 Difference]: Without dead ends: 8365 [2021-06-05 03:54:50,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 255.9ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:54:50,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8365 states. [2021-06-05 03:54:50,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8365 to 8044. [2021-06-05 03:54:50,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8044 states, 8043 states have (on average 3.134526917816735) internal successors, (25211), 8043 states have internal predecessors, (25211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:50,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8044 states to 8044 states and 25211 transitions. [2021-06-05 03:54:50,235 INFO L78 Accepts]: Start accepts. Automaton has 8044 states and 25211 transitions. Word has length 23 [2021-06-05 03:54:50,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:50,236 INFO L482 AbstractCegarLoop]: Abstraction has 8044 states and 25211 transitions. [2021-06-05 03:54:50,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:50,236 INFO L276 IsEmpty]: Start isEmpty. Operand 8044 states and 25211 transitions. [2021-06-05 03:54:50,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:50,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:50,244 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:50,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-05 03:54:50,445 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:50,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:50,445 INFO L82 PathProgramCache]: Analyzing trace with hash -804486405, now seen corresponding path program 303 times [2021-06-05 03:54:50,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:50,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764864633] [2021-06-05 03:54:50,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:50,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:50,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764864633] [2021-06-05 03:54:50,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764864633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:50,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203369200] [2021-06-05 03:54:50,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:50,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:54:50,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:50,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:50,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:50,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203369200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:50,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:50,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 03:54:50,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95202658] [2021-06-05 03:54:50,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:50,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:50,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:50,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:50,716 INFO L87 Difference]: Start difference. First operand 8044 states and 25211 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:51,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:51,049 INFO L93 Difference]: Finished difference Result 8378 states and 25745 transitions. [2021-06-05 03:54:51,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:54:51,050 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:51,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:51,061 INFO L225 Difference]: With dead ends: 8378 [2021-06-05 03:54:51,061 INFO L226 Difference]: Without dead ends: 8360 [2021-06-05 03:54:51,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 269.2ms TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:54:51,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8360 states. [2021-06-05 03:54:51,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8360 to 8008. [2021-06-05 03:54:51,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8008 states, 8007 states have (on average 3.129511677282378) internal successors, (25058), 8007 states have internal predecessors, (25058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:51,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8008 states to 8008 states and 25058 transitions. [2021-06-05 03:54:51,178 INFO L78 Accepts]: Start accepts. Automaton has 8008 states and 25058 transitions. Word has length 23 [2021-06-05 03:54:51,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:51,178 INFO L482 AbstractCegarLoop]: Abstraction has 8008 states and 25058 transitions. [2021-06-05 03:54:51,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:51,178 INFO L276 IsEmpty]: Start isEmpty. Operand 8008 states and 25058 transitions. [2021-06-05 03:54:51,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:51,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:51,187 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:51,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable544 [2021-06-05 03:54:51,388 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:51,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:51,388 INFO L82 PathProgramCache]: Analyzing trace with hash -838085633, now seen corresponding path program 304 times [2021-06-05 03:54:51,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:51,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039294418] [2021-06-05 03:54:51,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:51,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:51,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039294418] [2021-06-05 03:54:51,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039294418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:51,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367133594] [2021-06-05 03:54:51,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:51,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:51,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:51,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:51,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:51,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367133594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:51,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:51,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 03:54:51,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743981547] [2021-06-05 03:54:51,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:51,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:51,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:51,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:51,650 INFO L87 Difference]: Start difference. First operand 8008 states and 25058 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:52,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:52,038 INFO L93 Difference]: Finished difference Result 8369 states and 25633 transitions. [2021-06-05 03:54:52,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:52,038 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:52,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:52,049 INFO L225 Difference]: With dead ends: 8369 [2021-06-05 03:54:52,049 INFO L226 Difference]: Without dead ends: 8349 [2021-06-05 03:54:52,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 282.2ms TimeCoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:54:52,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8349 states. [2021-06-05 03:54:52,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8349 to 7964. [2021-06-05 03:54:52,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7964 states, 7963 states have (on average 3.126585457742057) internal successors, (24897), 7963 states have internal predecessors, (24897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:52,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 24897 transitions. [2021-06-05 03:54:52,159 INFO L78 Accepts]: Start accepts. Automaton has 7964 states and 24897 transitions. Word has length 23 [2021-06-05 03:54:52,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:52,159 INFO L482 AbstractCegarLoop]: Abstraction has 7964 states and 24897 transitions. [2021-06-05 03:54:52,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:52,159 INFO L276 IsEmpty]: Start isEmpty. Operand 7964 states and 24897 transitions. [2021-06-05 03:54:52,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:52,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:52,168 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:52,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-06-05 03:54:52,368 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:52,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:52,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1879661701, now seen corresponding path program 305 times [2021-06-05 03:54:52,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:52,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004551967] [2021-06-05 03:54:52,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:52,495 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:52,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:52,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004551967] [2021-06-05 03:54:52,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004551967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:52,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538313166] [2021-06-05 03:54:52,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:52,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:54:52,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:52,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:52,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:52,663 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:52,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538313166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:52,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:52,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 03:54:52,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952161861] [2021-06-05 03:54:52,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:52,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:52,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:52,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:52,664 INFO L87 Difference]: Start difference. First operand 7964 states and 24897 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:53,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:53,117 INFO L93 Difference]: Finished difference Result 8358 states and 25520 transitions. [2021-06-05 03:54:53,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:54:53,117 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:53,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:53,129 INFO L225 Difference]: With dead ends: 8358 [2021-06-05 03:54:53,130 INFO L226 Difference]: Without dead ends: 8336 [2021-06-05 03:54:53,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 340.0ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:54:53,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8336 states. [2021-06-05 03:54:53,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8336 to 7922. [2021-06-05 03:54:53,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7922 states, 7921 states have (on average 3.1249842191642467) internal successors, (24753), 7921 states have internal predecessors, (24753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:53,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7922 states to 7922 states and 24753 transitions. [2021-06-05 03:54:53,256 INFO L78 Accepts]: Start accepts. Automaton has 7922 states and 24753 transitions. Word has length 23 [2021-06-05 03:54:53,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:53,256 INFO L482 AbstractCegarLoop]: Abstraction has 7922 states and 24753 transitions. [2021-06-05 03:54:53,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:53,256 INFO L276 IsEmpty]: Start isEmpty. Operand 7922 states and 24753 transitions. [2021-06-05 03:54:53,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:53,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:53,266 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:53,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:53,485 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:53,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:53,485 INFO L82 PathProgramCache]: Analyzing trace with hash 191218559, now seen corresponding path program 306 times [2021-06-05 03:54:53,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:53,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327363393] [2021-06-05 03:54:53,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:53,668 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:53,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:53,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327363393] [2021-06-05 03:54:53,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327363393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:53,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130447329] [2021-06-05 03:54:53,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:53,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:54:53,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:53,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:53,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:53,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130447329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:53,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:53,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 03:54:53,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055825938] [2021-06-05 03:54:53,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:53,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:53,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:53,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:53,829 INFO L87 Difference]: Start difference. First operand 7922 states and 24753 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:54,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:54,306 INFO L93 Difference]: Finished difference Result 8208 states and 25204 transitions. [2021-06-05 03:54:54,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:54:54,306 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:54,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:54,318 INFO L225 Difference]: With dead ends: 8208 [2021-06-05 03:54:54,318 INFO L226 Difference]: Without dead ends: 8184 [2021-06-05 03:54:54,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 364.4ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:54:54,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8184 states. [2021-06-05 03:54:54,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8184 to 7881. [2021-06-05 03:54:54,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7881 states, 7880 states have (on average 3.1266497461928933) internal successors, (24638), 7880 states have internal predecessors, (24638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:54,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7881 states to 7881 states and 24638 transitions. [2021-06-05 03:54:54,447 INFO L78 Accepts]: Start accepts. Automaton has 7881 states and 24638 transitions. Word has length 23 [2021-06-05 03:54:54,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:54,447 INFO L482 AbstractCegarLoop]: Abstraction has 7881 states and 24638 transitions. [2021-06-05 03:54:54,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:54,447 INFO L276 IsEmpty]: Start isEmpty. Operand 7881 states and 24638 transitions. [2021-06-05 03:54:54,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:54,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:54,457 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:54,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-06-05 03:54:54,673 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:54,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:54,673 INFO L82 PathProgramCache]: Analyzing trace with hash -36002821, now seen corresponding path program 307 times [2021-06-05 03:54:54,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:54,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311849822] [2021-06-05 03:54:54,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:54,820 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:54,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:54,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311849822] [2021-06-05 03:54:54,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311849822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:54,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327822419] [2021-06-05 03:54:54,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:54,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:54,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:54,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327822419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:54,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:54,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 03:54:54,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901411820] [2021-06-05 03:54:54,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:54,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:54,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:54,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:54,963 INFO L87 Difference]: Start difference. First operand 7881 states and 24638 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:55,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:55,404 INFO L93 Difference]: Finished difference Result 8087 states and 24955 transitions. [2021-06-05 03:54:55,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:54:55,405 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:55,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:55,416 INFO L225 Difference]: With dead ends: 8087 [2021-06-05 03:54:55,417 INFO L226 Difference]: Without dead ends: 8080 [2021-06-05 03:54:55,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 315.7ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:54:55,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8080 states. [2021-06-05 03:54:55,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8080 to 7893. [2021-06-05 03:54:55,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7893 states, 7892 states have (on average 3.124176381145464) internal successors, (24656), 7892 states have internal predecessors, (24656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:55,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7893 states to 7893 states and 24656 transitions. [2021-06-05 03:54:55,580 INFO L78 Accepts]: Start accepts. Automaton has 7893 states and 24656 transitions. Word has length 23 [2021-06-05 03:54:55,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:55,580 INFO L482 AbstractCegarLoop]: Abstraction has 7893 states and 24656 transitions. [2021-06-05 03:54:55,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:55,580 INFO L276 IsEmpty]: Start isEmpty. Operand 7893 states and 24656 transitions. [2021-06-05 03:54:55,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:55,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:55,590 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:55,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable556,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:55,790 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:55,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:55,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1252511357, now seen corresponding path program 308 times [2021-06-05 03:54:55,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:55,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416730360] [2021-06-05 03:54:55,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:55,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:55,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416730360] [2021-06-05 03:54:55,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416730360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:55,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458277129] [2021-06-05 03:54:55,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:55,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:55,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:55,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:55,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:56,104 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:56,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458277129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:56,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:56,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 03:54:56,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245026772] [2021-06-05 03:54:56,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:54:56,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:56,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:54:56,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:56,105 INFO L87 Difference]: Start difference. First operand 7893 states and 24656 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:56,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:56,351 INFO L93 Difference]: Finished difference Result 8261 states and 25496 transitions. [2021-06-05 03:54:56,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:54:56,351 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:56,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:56,362 INFO L225 Difference]: With dead ends: 8261 [2021-06-05 03:54:56,362 INFO L226 Difference]: Without dead ends: 8251 [2021-06-05 03:54:56,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 285.6ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:54:56,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2021-06-05 03:54:56,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 7953. [2021-06-05 03:54:56,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7953 states, 7952 states have (on average 3.1281438631790746) internal successors, (24875), 7952 states have internal predecessors, (24875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:56,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7953 states to 7953 states and 24875 transitions. [2021-06-05 03:54:56,472 INFO L78 Accepts]: Start accepts. Automaton has 7953 states and 24875 transitions. Word has length 23 [2021-06-05 03:54:56,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:56,472 INFO L482 AbstractCegarLoop]: Abstraction has 7953 states and 24875 transitions. [2021-06-05 03:54:56,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:56,473 INFO L276 IsEmpty]: Start isEmpty. Operand 7953 states and 24875 transitions. [2021-06-05 03:54:56,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:56,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:56,481 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:56,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable559 [2021-06-05 03:54:56,697 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:56,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:56,697 INFO L82 PathProgramCache]: Analyzing trace with hash 362191367, now seen corresponding path program 309 times [2021-06-05 03:54:56,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:56,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850369196] [2021-06-05 03:54:56,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:56,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:56,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850369196] [2021-06-05 03:54:56,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850369196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:56,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097600041] [2021-06-05 03:54:56,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:56,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:54:56,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:56,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:56,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:57,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097600041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:57,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:57,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-05 03:54:57,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560951345] [2021-06-05 03:54:57,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:57,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:57,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:57,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:57,030 INFO L87 Difference]: Start difference. First operand 7953 states and 24875 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:57,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:57,269 INFO L93 Difference]: Finished difference Result 8243 states and 25454 transitions. [2021-06-05 03:54:57,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:54:57,270 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:57,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:57,281 INFO L225 Difference]: With dead ends: 8243 [2021-06-05 03:54:57,281 INFO L226 Difference]: Without dead ends: 8236 [2021-06-05 03:54:57,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 290.9ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:54:57,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8236 states. [2021-06-05 03:54:57,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8236 to 7951. [2021-06-05 03:54:57,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7951 states, 7950 states have (on average 3.127924528301887) internal successors, (24867), 7950 states have internal predecessors, (24867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:57,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7951 states to 7951 states and 24867 transitions. [2021-06-05 03:54:57,402 INFO L78 Accepts]: Start accepts. Automaton has 7951 states and 24867 transitions. Word has length 23 [2021-06-05 03:54:57,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:57,403 INFO L482 AbstractCegarLoop]: Abstraction has 7951 states and 24867 transitions. [2021-06-05 03:54:57,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:57,403 INFO L276 IsEmpty]: Start isEmpty. Operand 7951 states and 24867 transitions. [2021-06-05 03:54:57,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:57,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:57,412 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:57,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-06-05 03:54:57,613 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:57,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:57,613 INFO L82 PathProgramCache]: Analyzing trace with hash -681056551, now seen corresponding path program 310 times [2021-06-05 03:54:57,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:57,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288438217] [2021-06-05 03:54:57,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:57,757 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:57,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:57,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288438217] [2021-06-05 03:54:57,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288438217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:57,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013895564] [2021-06-05 03:54:57,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:57,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:57,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:57,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:57,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:57,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013895564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:57,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:57,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-05 03:54:57,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614812858] [2021-06-05 03:54:57,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:57,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:57,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:57,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:57,939 INFO L87 Difference]: Start difference. First operand 7951 states and 24867 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:58,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:58,144 INFO L93 Difference]: Finished difference Result 8146 states and 25212 transitions. [2021-06-05 03:54:58,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:54:58,144 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:58,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:58,156 INFO L225 Difference]: With dead ends: 8146 [2021-06-05 03:54:58,156 INFO L226 Difference]: Without dead ends: 8139 [2021-06-05 03:54:58,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 282.7ms TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:54:58,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8139 states. [2021-06-05 03:54:58,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8139 to 7950. [2021-06-05 03:54:58,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7950 states, 7949 states have (on average 3.127940621461819) internal successors, (24864), 7949 states have internal predecessors, (24864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:58,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7950 states to 7950 states and 24864 transitions. [2021-06-05 03:54:58,292 INFO L78 Accepts]: Start accepts. Automaton has 7950 states and 24864 transitions. Word has length 23 [2021-06-05 03:54:58,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:58,292 INFO L482 AbstractCegarLoop]: Abstraction has 7950 states and 24864 transitions. [2021-06-05 03:54:58,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:58,292 INFO L276 IsEmpty]: Start isEmpty. Operand 7950 states and 24864 transitions. [2021-06-05 03:54:58,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:58,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:58,302 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:58,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-06-05 03:54:58,502 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:58,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:58,502 INFO L82 PathProgramCache]: Analyzing trace with hash 521161979, now seen corresponding path program 311 times [2021-06-05 03:54:58,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:58,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724373579] [2021-06-05 03:54:58,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:58,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:58,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724373579] [2021-06-05 03:54:58,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724373579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:58,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81270388] [2021-06-05 03:54:58,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:58,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 03:54:58,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:58,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:58,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:58,799 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:58,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81270388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:58,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:58,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 03:54:58,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975298375] [2021-06-05 03:54:58,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:58,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:58,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:58,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:58,800 INFO L87 Difference]: Start difference. First operand 7950 states and 24864 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:59,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:59,023 INFO L93 Difference]: Finished difference Result 8403 states and 25974 transitions. [2021-06-05 03:54:59,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:54:59,023 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:59,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:59,033 INFO L225 Difference]: With dead ends: 8403 [2021-06-05 03:54:59,034 INFO L226 Difference]: Without dead ends: 8393 [2021-06-05 03:54:59,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 262.3ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:54:59,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8393 states. [2021-06-05 03:54:59,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8393 to 8044. [2021-06-05 03:54:59,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8044 states, 8043 states have (on average 3.133034937212483) internal successors, (25199), 8043 states have internal predecessors, (25199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:59,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8044 states to 8044 states and 25199 transitions. [2021-06-05 03:54:59,153 INFO L78 Accepts]: Start accepts. Automaton has 8044 states and 25199 transitions. Word has length 23 [2021-06-05 03:54:59,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:59,154 INFO L482 AbstractCegarLoop]: Abstraction has 8044 states and 25199 transitions. [2021-06-05 03:54:59,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:59,154 INFO L276 IsEmpty]: Start isEmpty. Operand 8044 states and 25199 transitions. [2021-06-05 03:54:59,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:54:59,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:59,163 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:59,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable568,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:59,363 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:59,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:59,364 INFO L82 PathProgramCache]: Analyzing trace with hash 2135864703, now seen corresponding path program 312 times [2021-06-05 03:54:59,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:59,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111695518] [2021-06-05 03:54:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:59,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:59,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111695518] [2021-06-05 03:54:59,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111695518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:59,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122395698] [2021-06-05 03:54:59,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:59,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 03:54:59,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:59,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:54:59,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:59,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122395698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:59,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:59,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-05 03:54:59,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106806079] [2021-06-05 03:54:59,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:54:59,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:59,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:54:59,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:59,649 INFO L87 Difference]: Start difference. First operand 8044 states and 25199 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:59,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:59,872 INFO L93 Difference]: Finished difference Result 8384 states and 25924 transitions. [2021-06-05 03:54:59,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:54:59,872 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:54:59,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:59,883 INFO L225 Difference]: With dead ends: 8384 [2021-06-05 03:54:59,883 INFO L226 Difference]: Without dead ends: 8377 [2021-06-05 03:54:59,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 256.5ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:54:59,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8377 states. [2021-06-05 03:54:59,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8377 to 8041. [2021-06-05 03:54:59,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8041 states, 8040 states have (on average 3.1327114427860696) internal successors, (25187), 8040 states have internal predecessors, (25187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:59,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8041 states to 8041 states and 25187 transitions. [2021-06-05 03:54:59,997 INFO L78 Accepts]: Start accepts. Automaton has 8041 states and 25187 transitions. Word has length 23 [2021-06-05 03:54:59,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:59,997 INFO L482 AbstractCegarLoop]: Abstraction has 8041 states and 25187 transitions. [2021-06-05 03:54:59,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:59,997 INFO L276 IsEmpty]: Start isEmpty. Operand 8041 states and 25187 transitions. [2021-06-05 03:55:00,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:55:00,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:00,005 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:00,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:00,206 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:00,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:00,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1092616785, now seen corresponding path program 313 times [2021-06-05 03:55:00,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:00,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203104495] [2021-06-05 03:55:00,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:00,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:00,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203104495] [2021-06-05 03:55:00,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203104495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:00,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851628151] [2021-06-05 03:55:00,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:00,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:00,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:55:00,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:00,497 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:00,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851628151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:00,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:00,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 03:55:00,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956260573] [2021-06-05 03:55:00,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:55:00,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:00,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:55:00,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:55:00,497 INFO L87 Difference]: Start difference. First operand 8041 states and 25187 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:00,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:00,736 INFO L93 Difference]: Finished difference Result 8323 states and 25762 transitions. [2021-06-05 03:55:00,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:55:00,736 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:55:00,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:00,747 INFO L225 Difference]: With dead ends: 8323 [2021-06-05 03:55:00,747 INFO L226 Difference]: Without dead ends: 8310 [2021-06-05 03:55:00,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 274.1ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:55:00,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8310 states. [2021-06-05 03:55:00,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8310 to 8045. [2021-06-05 03:55:00,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8045 states, 8044 states have (on average 3.131775236200895) internal successors, (25192), 8044 states have internal predecessors, (25192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:00,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8045 states to 8045 states and 25192 transitions. [2021-06-05 03:55:00,878 INFO L78 Accepts]: Start accepts. Automaton has 8045 states and 25192 transitions. Word has length 23 [2021-06-05 03:55:00,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:00,878 INFO L482 AbstractCegarLoop]: Abstraction has 8045 states and 25192 transitions. [2021-06-05 03:55:00,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:00,878 INFO L276 IsEmpty]: Start isEmpty. Operand 8045 states and 25192 transitions. [2021-06-05 03:55:00,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:55:00,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:00,887 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:01,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-06-05 03:55:01,088 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:01,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:01,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1627846587, now seen corresponding path program 314 times [2021-06-05 03:55:01,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:01,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711230028] [2021-06-05 03:55:01,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:01,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:01,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711230028] [2021-06-05 03:55:01,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711230028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:01,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331691891] [2021-06-05 03:55:01,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:01,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:01,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:01,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:55:01,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:01,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331691891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:01,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:01,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 03:55:01,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122115766] [2021-06-05 03:55:01,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:55:01,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:01,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:55:01,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:55:01,377 INFO L87 Difference]: Start difference. First operand 8045 states and 25192 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:01,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:01,674 INFO L93 Difference]: Finished difference Result 8231 states and 25513 transitions. [2021-06-05 03:55:01,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:55:01,674 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:55:01,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:01,686 INFO L225 Difference]: With dead ends: 8231 [2021-06-05 03:55:01,686 INFO L226 Difference]: Without dead ends: 8224 [2021-06-05 03:55:01,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 277.2ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:55:01,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8224 states. [2021-06-05 03:55:01,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8224 to 8043. [2021-06-05 03:55:01,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8043 states, 8042 states have (on average 3.1318080079582193) internal successors, (25186), 8042 states have internal predecessors, (25186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:01,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8043 states to 8043 states and 25186 transitions. [2021-06-05 03:55:01,811 INFO L78 Accepts]: Start accepts. Automaton has 8043 states and 25186 transitions. Word has length 23 [2021-06-05 03:55:01,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:01,811 INFO L482 AbstractCegarLoop]: Abstraction has 8043 states and 25186 transitions. [2021-06-05 03:55:01,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:01,812 INFO L276 IsEmpty]: Start isEmpty. Operand 8043 states and 25186 transitions. [2021-06-05 03:55:01,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:55:01,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:01,821 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:02,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:02,036 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:02,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:02,037 INFO L82 PathProgramCache]: Analyzing trace with hash -108653125, now seen corresponding path program 315 times [2021-06-05 03:55:02,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:02,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547579175] [2021-06-05 03:55:02,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:02,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:02,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547579175] [2021-06-05 03:55:02,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547579175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:02,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650147701] [2021-06-05 03:55:02,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:02,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 03:55:02,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:02,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:55:02,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:02,371 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:02,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650147701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:02,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:02,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 03:55:02,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381414612] [2021-06-05 03:55:02,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:55:02,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:02,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:55:02,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:55:02,372 INFO L87 Difference]: Start difference. First operand 8043 states and 25186 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:02,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:02,622 INFO L93 Difference]: Finished difference Result 8179 states and 25417 transitions. [2021-06-05 03:55:02,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:02,623 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:55:02,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:02,634 INFO L225 Difference]: With dead ends: 8179 [2021-06-05 03:55:02,634 INFO L226 Difference]: Without dead ends: 8163 [2021-06-05 03:55:02,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 314.9ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:55:02,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8163 states. [2021-06-05 03:55:02,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8163 to 8022. [2021-06-05 03:55:02,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8022 states, 8021 states have (on average 3.132153098117442) internal successors, (25123), 8021 states have internal predecessors, (25123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:02,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8022 states to 8022 states and 25123 transitions. [2021-06-05 03:55:02,756 INFO L78 Accepts]: Start accepts. Automaton has 8022 states and 25123 transitions. Word has length 23 [2021-06-05 03:55:02,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:02,757 INFO L482 AbstractCegarLoop]: Abstraction has 8022 states and 25123 transitions. [2021-06-05 03:55:02,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:02,757 INFO L276 IsEmpty]: Start isEmpty. Operand 8022 states and 25123 transitions. [2021-06-05 03:55:02,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:55:02,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:02,766 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:02,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,319 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:02,973 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:02,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:02,973 INFO L82 PathProgramCache]: Analyzing trace with hash -329539453, now seen corresponding path program 316 times [2021-06-05 03:55:02,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:02,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417532185] [2021-06-05 03:55:02,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:03,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:03,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417532185] [2021-06-05 03:55:03,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417532185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:03,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330431817] [2021-06-05 03:55:03,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:03,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:03,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:03,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:55:03,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:03,255 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:03,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330431817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:03,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:03,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-05 03:55:03,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665798416] [2021-06-05 03:55:03,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:55:03,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:03,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:55:03,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:55:03,256 INFO L87 Difference]: Start difference. First operand 8022 states and 25123 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:03,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:03,501 INFO L93 Difference]: Finished difference Result 8489 states and 26222 transitions. [2021-06-05 03:55:03,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:55:03,501 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:55:03,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:03,512 INFO L225 Difference]: With dead ends: 8489 [2021-06-05 03:55:03,513 INFO L226 Difference]: Without dead ends: 8479 [2021-06-05 03:55:03,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 249.4ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:55:03,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8479 states. [2021-06-05 03:55:03,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8479 to 8124. [2021-06-05 03:55:03,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8124 states, 8123 states have (on average 3.1368952357503384) internal successors, (25481), 8123 states have internal predecessors, (25481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:03,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8124 states to 8124 states and 25481 transitions. [2021-06-05 03:55:03,644 INFO L78 Accepts]: Start accepts. Automaton has 8124 states and 25481 transitions. Word has length 23 [2021-06-05 03:55:03,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:03,644 INFO L482 AbstractCegarLoop]: Abstraction has 8124 states and 25481 transitions. [2021-06-05 03:55:03,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:03,645 INFO L276 IsEmpty]: Start isEmpty. Operand 8124 states and 25481 transitions. [2021-06-05 03:55:03,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:55:03,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:03,654 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:03,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:03,855 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:03,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:03,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1285163271, now seen corresponding path program 317 times [2021-06-05 03:55:03,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:03,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70303923] [2021-06-05 03:55:03,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:03,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:03,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70303923] [2021-06-05 03:55:03,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70303923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:03,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936246976] [2021-06-05 03:55:03,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:04,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:55:04,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:04,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:55:04,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:04,155 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:04,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936246976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:04,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:04,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-06-05 03:55:04,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780093062] [2021-06-05 03:55:04,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:55:04,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:04,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:55:04,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:04,156 INFO L87 Difference]: Start difference. First operand 8124 states and 25481 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:04,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:04,398 INFO L93 Difference]: Finished difference Result 8470 states and 26170 transitions. [2021-06-05 03:55:04,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:55:04,399 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:55:04,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:04,410 INFO L225 Difference]: With dead ends: 8470 [2021-06-05 03:55:04,410 INFO L226 Difference]: Without dead ends: 8463 [2021-06-05 03:55:04,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 269.8ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:55:04,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8463 states. [2021-06-05 03:55:04,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8463 to 8120. [2021-06-05 03:55:04,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8120 states, 8119 states have (on average 3.1364700086217514) internal successors, (25465), 8119 states have internal predecessors, (25465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:04,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8120 states to 8120 states and 25465 transitions. [2021-06-05 03:55:04,520 INFO L78 Accepts]: Start accepts. Automaton has 8120 states and 25465 transitions. Word has length 23 [2021-06-05 03:55:04,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:04,520 INFO L482 AbstractCegarLoop]: Abstraction has 8120 states and 25465 transitions. [2021-06-05 03:55:04,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:04,520 INFO L276 IsEmpty]: Start isEmpty. Operand 8120 states and 25465 transitions. [2021-06-05 03:55:04,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:55:04,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:04,530 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:04,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-06-05 03:55:04,730 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:04,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:04,730 INFO L82 PathProgramCache]: Analyzing trace with hash 241915353, now seen corresponding path program 318 times [2021-06-05 03:55:04,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:04,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407668331] [2021-06-05 03:55:04,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:04,858 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:04,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:04,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407668331] [2021-06-05 03:55:04,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407668331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:04,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989113029] [2021-06-05 03:55:04,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:04,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 03:55:04,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:04,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:55:04,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:05,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989113029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:05,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:05,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-05 03:55:05,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390106389] [2021-06-05 03:55:05,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:55:05,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:05,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:55:05,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:55:05,019 INFO L87 Difference]: Start difference. First operand 8120 states and 25465 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:05,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:05,306 INFO L93 Difference]: Finished difference Result 8466 states and 26134 transitions. [2021-06-05 03:55:05,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:55:05,306 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:55:05,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:05,318 INFO L225 Difference]: With dead ends: 8466 [2021-06-05 03:55:05,318 INFO L226 Difference]: Without dead ends: 8453 [2021-06-05 03:55:05,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 276.8ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:55:05,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8453 states. [2021-06-05 03:55:05,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8453 to 8117. [2021-06-05 03:55:05,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8117 states, 8116 states have (on average 3.13590438639724) internal successors, (25451), 8116 states have internal predecessors, (25451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:05,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8117 states to 8117 states and 25451 transitions. [2021-06-05 03:55:05,448 INFO L78 Accepts]: Start accepts. Automaton has 8117 states and 25451 transitions. Word has length 23 [2021-06-05 03:55:05,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:05,448 INFO L482 AbstractCegarLoop]: Abstraction has 8117 states and 25451 transitions. [2021-06-05 03:55:05,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:05,448 INFO L276 IsEmpty]: Start isEmpty. Operand 8117 states and 25451 transitions. [2021-06-05 03:55:05,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:55:05,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:05,459 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:05,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-06-05 03:55:05,659 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:05,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:05,659 INFO L82 PathProgramCache]: Analyzing trace with hash 777145155, now seen corresponding path program 319 times [2021-06-05 03:55:05,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:05,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420073067] [2021-06-05 03:55:05,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:05,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:05,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420073067] [2021-06-05 03:55:05,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420073067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:05,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911765939] [2021-06-05 03:55:05,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:05,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:55:05,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:05,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911765939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:05,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:05,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-05 03:55:05,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832624334] [2021-06-05 03:55:05,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:55:05,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:05,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:55:05,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:55:05,974 INFO L87 Difference]: Start difference. First operand 8117 states and 25451 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:06,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:06,381 INFO L93 Difference]: Finished difference Result 8405 states and 25973 transitions. [2021-06-05 03:55:06,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:55:06,381 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:55:06,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:06,392 INFO L225 Difference]: With dead ends: 8405 [2021-06-05 03:55:06,392 INFO L226 Difference]: Without dead ends: 8389 [2021-06-05 03:55:06,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 307.3ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:55:06,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8389 states. [2021-06-05 03:55:06,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8389 to 8120. [2021-06-05 03:55:06,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8120 states, 8119 states have (on average 3.134745658332307) internal successors, (25451), 8119 states have internal predecessors, (25451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:06,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8120 states to 8120 states and 25451 transitions. [2021-06-05 03:55:06,515 INFO L78 Accepts]: Start accepts. Automaton has 8120 states and 25451 transitions. Word has length 23 [2021-06-05 03:55:06,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:06,515 INFO L482 AbstractCegarLoop]: Abstraction has 8120 states and 25451 transitions. [2021-06-05 03:55:06,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:06,515 INFO L276 IsEmpty]: Start isEmpty. Operand 8120 states and 25451 transitions. [2021-06-05 03:55:06,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:55:06,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:06,525 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:06,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:06,726 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:06,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:06,726 INFO L82 PathProgramCache]: Analyzing trace with hash 189399833, now seen corresponding path program 320 times [2021-06-05 03:55:06,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:06,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076928873] [2021-06-05 03:55:06,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:06,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:06,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076928873] [2021-06-05 03:55:06,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076928873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:06,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169081191] [2021-06-05 03:55:06,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:06,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:06,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:06,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:55:06,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:07,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169081191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:07,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:07,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-05 03:55:07,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547401323] [2021-06-05 03:55:07,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:55:07,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:07,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:55:07,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:55:07,051 INFO L87 Difference]: Start difference. First operand 8120 states and 25451 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:07,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:07,367 INFO L93 Difference]: Finished difference Result 8334 states and 25817 transitions. [2021-06-05 03:55:07,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:55:07,368 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:55:07,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:07,380 INFO L225 Difference]: With dead ends: 8334 [2021-06-05 03:55:07,381 INFO L226 Difference]: Without dead ends: 8327 [2021-06-05 03:55:07,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 306.1ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:55:07,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8327 states. [2021-06-05 03:55:07,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8327 to 8117. [2021-06-05 03:55:07,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8117 states, 8116 states have (on average 3.1347954657466732) internal successors, (25442), 8116 states have internal predecessors, (25442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:07,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8117 states to 8117 states and 25442 transitions. [2021-06-05 03:55:07,504 INFO L78 Accepts]: Start accepts. Automaton has 8117 states and 25442 transitions. Word has length 23 [2021-06-05 03:55:07,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:07,504 INFO L482 AbstractCegarLoop]: Abstraction has 8117 states and 25442 transitions. [2021-06-05 03:55:07,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:07,504 INFO L276 IsEmpty]: Start isEmpty. Operand 8117 states and 25442 transitions. [2021-06-05 03:55:07,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:55:07,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:07,514 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:07,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-06-05 03:55:07,715 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:07,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:07,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1894430651, now seen corresponding path program 321 times [2021-06-05 03:55:07,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:07,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185441745] [2021-06-05 03:55:07,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:07,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:07,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:07,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185441745] [2021-06-05 03:55:07,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185441745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:07,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773274239] [2021-06-05 03:55:07,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:07,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:55:07,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:07,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:55:07,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:08,118 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:08,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773274239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:08,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:08,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 03:55:08,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980590708] [2021-06-05 03:55:08,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:55:08,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:08,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:55:08,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:55:08,119 INFO L87 Difference]: Start difference. First operand 8117 states and 25442 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:08,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:08,402 INFO L93 Difference]: Finished difference Result 8376 states and 25895 transitions. [2021-06-05 03:55:08,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:08,402 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:55:08,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:08,414 INFO L225 Difference]: With dead ends: 8376 [2021-06-05 03:55:08,414 INFO L226 Difference]: Without dead ends: 8360 [2021-06-05 03:55:08,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 325.7ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:55:08,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8360 states. [2021-06-05 03:55:08,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8360 to 8101. [2021-06-05 03:55:08,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8101 states, 8100 states have (on average 3.1339506172839506) internal successors, (25385), 8100 states have internal predecessors, (25385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:08,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8101 states to 8101 states and 25385 transitions. [2021-06-05 03:55:08,542 INFO L78 Accepts]: Start accepts. Automaton has 8101 states and 25385 transitions. Word has length 23 [2021-06-05 03:55:08,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:08,542 INFO L482 AbstractCegarLoop]: Abstraction has 8101 states and 25385 transitions. [2021-06-05 03:55:08,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:08,542 INFO L276 IsEmpty]: Start isEmpty. Operand 8101 states and 25385 transitions. [2021-06-05 03:55:08,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:55:08,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:08,552 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:08,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 03:55:08,765 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:08,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:08,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2102483687, now seen corresponding path program 322 times [2021-06-05 03:55:08,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:08,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929139354] [2021-06-05 03:55:08,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:08,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:08,903 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:08,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:08,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929139354] [2021-06-05 03:55:08,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929139354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:08,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157730115] [2021-06-05 03:55:08,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:08,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:08,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:08,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:55:08,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:09,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157730115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:09,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:09,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-05 03:55:09,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005060410] [2021-06-05 03:55:09,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:55:09,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:09,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:55:09,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:55:09,066 INFO L87 Difference]: Start difference. First operand 8101 states and 25385 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:09,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:09,413 INFO L93 Difference]: Finished difference Result 8270 states and 25679 transitions. [2021-06-05 03:55:09,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:55:09,414 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:55:09,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:09,427 INFO L225 Difference]: With dead ends: 8270 [2021-06-05 03:55:09,427 INFO L226 Difference]: Without dead ends: 8251 [2021-06-05 03:55:09,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 294.7ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:55:09,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2021-06-05 03:55:09,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 8085. [2021-06-05 03:55:09,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8085 states, 8084 states have (on average 3.13421573478476) internal successors, (25337), 8084 states have internal predecessors, (25337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:09,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8085 states to 8085 states and 25337 transitions. [2021-06-05 03:55:09,583 INFO L78 Accepts]: Start accepts. Automaton has 8085 states and 25337 transitions. Word has length 23 [2021-06-05 03:55:09,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:09,583 INFO L482 AbstractCegarLoop]: Abstraction has 8085 states and 25337 transitions. [2021-06-05 03:55:09,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:09,583 INFO L276 IsEmpty]: Start isEmpty. Operand 8085 states and 25337 transitions. [2021-06-05 03:55:09,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:55:09,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:09,594 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:09,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-05 03:55:09,795 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:09,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:09,795 INFO L82 PathProgramCache]: Analyzing trace with hash -931480069, now seen corresponding path program 323 times [2021-06-05 03:55:09,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:09,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240711373] [2021-06-05 03:55:09,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:09,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:09,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:09,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240711373] [2021-06-05 03:55:09,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240711373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:09,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083315898] [2021-06-05 03:55:09,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:09,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:55:09,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:09,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:55:09,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:10,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083315898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:10,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:10,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-05 03:55:10,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025867008] [2021-06-05 03:55:10,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:55:10,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:10,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:55:10,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:55:10,092 INFO L87 Difference]: Start difference. First operand 8085 states and 25337 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:10,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:10,354 INFO L93 Difference]: Finished difference Result 8595 states and 26485 transitions. [2021-06-05 03:55:10,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:55:10,354 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:55:10,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:10,366 INFO L225 Difference]: With dead ends: 8595 [2021-06-05 03:55:10,366 INFO L226 Difference]: Without dead ends: 8585 [2021-06-05 03:55:10,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 256.1ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:55:10,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8585 states. [2021-06-05 03:55:10,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8585 to 8181. [2021-06-05 03:55:10,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8181 states, 8180 states have (on average 3.1383863080684598) internal successors, (25672), 8180 states have internal predecessors, (25672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:10,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8181 states to 8181 states and 25672 transitions. [2021-06-05 03:55:10,486 INFO L78 Accepts]: Start accepts. Automaton has 8181 states and 25672 transitions. Word has length 23 [2021-06-05 03:55:10,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:10,486 INFO L482 AbstractCegarLoop]: Abstraction has 8181 states and 25672 transitions. [2021-06-05 03:55:10,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:10,486 INFO L276 IsEmpty]: Start isEmpty. Operand 8181 states and 25672 transitions. [2021-06-05 03:55:10,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:55:10,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:10,495 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:10,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable604,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:10,696 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:10,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:10,696 INFO L82 PathProgramCache]: Analyzing trace with hash 683222655, now seen corresponding path program 324 times [2021-06-05 03:55:10,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:10,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230963213] [2021-06-05 03:55:10,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:10,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:10,825 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:10,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:10,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230963213] [2021-06-05 03:55:10,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230963213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:10,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748854943] [2021-06-05 03:55:10,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:10,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:55:10,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:10,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:55:10,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:10,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748854943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:10,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:10,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2021-06-05 03:55:10,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136723862] [2021-06-05 03:55:10,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:55:10,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:10,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:55:10,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:10,988 INFO L87 Difference]: Start difference. First operand 8181 states and 25672 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:11,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:11,238 INFO L93 Difference]: Finished difference Result 8579 states and 26445 transitions. [2021-06-05 03:55:11,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:55:11,238 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:55:11,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:11,248 INFO L225 Difference]: With dead ends: 8579 [2021-06-05 03:55:11,248 INFO L226 Difference]: Without dead ends: 8572 [2021-06-05 03:55:11,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 256.0ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:55:11,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8572 states. [2021-06-05 03:55:11,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8572 to 8170. [2021-06-05 03:55:11,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8170 states, 8169 states have (on average 3.138082996694822) internal successors, (25635), 8169 states have internal predecessors, (25635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:11,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8170 states to 8170 states and 25635 transitions. [2021-06-05 03:55:11,360 INFO L78 Accepts]: Start accepts. Automaton has 8170 states and 25635 transitions. Word has length 23 [2021-06-05 03:55:11,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:11,360 INFO L482 AbstractCegarLoop]: Abstraction has 8170 states and 25635 transitions. [2021-06-05 03:55:11,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:11,360 INFO L276 IsEmpty]: Start isEmpty. Operand 8170 states and 25635 transitions. [2021-06-05 03:55:11,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:55:11,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:11,369 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:11,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:11,570 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:11,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:11,570 INFO L82 PathProgramCache]: Analyzing trace with hash -360025263, now seen corresponding path program 325 times [2021-06-05 03:55:11,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:11,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984700052] [2021-06-05 03:55:11,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:11,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:11,691 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:11,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:11,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984700052] [2021-06-05 03:55:11,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984700052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:11,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443847593] [2021-06-05 03:55:11,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:11,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:55:11,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:11,841 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:11,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443847593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:11,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:11,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-05 03:55:11,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749700759] [2021-06-05 03:55:11,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:55:11,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:11,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:55:11,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:55:11,842 INFO L87 Difference]: Start difference. First operand 8170 states and 25635 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:12,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:12,117 INFO L93 Difference]: Finished difference Result 8583 states and 26428 transitions. [2021-06-05 03:55:12,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:55:12,117 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:55:12,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:12,128 INFO L225 Difference]: With dead ends: 8583 [2021-06-05 03:55:12,128 INFO L226 Difference]: Without dead ends: 8570 [2021-06-05 03:55:12,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 252.1ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:55:12,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8570 states. [2021-06-05 03:55:12,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8570 to 8166. [2021-06-05 03:55:12,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8166 states, 8165 states have (on average 3.1375382731169625) internal successors, (25618), 8165 states have internal predecessors, (25618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8166 states to 8166 states and 25618 transitions. [2021-06-05 03:55:12,281 INFO L78 Accepts]: Start accepts. Automaton has 8166 states and 25618 transitions. Word has length 23 [2021-06-05 03:55:12,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:12,281 INFO L482 AbstractCegarLoop]: Abstraction has 8166 states and 25618 transitions. [2021-06-05 03:55:12,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:12,281 INFO L276 IsEmpty]: Start isEmpty. Operand 8166 states and 25618 transitions. [2021-06-05 03:55:12,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:55:12,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:12,291 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:12,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable610 [2021-06-05 03:55:12,491 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:12,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:12,492 INFO L82 PathProgramCache]: Analyzing trace with hash 175204539, now seen corresponding path program 326 times [2021-06-05 03:55:12,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:12,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983267602] [2021-06-05 03:55:12,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:12,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:12,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:12,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983267602] [2021-06-05 03:55:12,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983267602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:12,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454096671] [2021-06-05 03:55:12,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:12,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:12,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:12,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:55:12,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:12,781 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:12,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454096671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:12,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:12,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-05 03:55:12,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188454099] [2021-06-05 03:55:12,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:55:12,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:12,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:55:12,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:55:12,782 INFO L87 Difference]: Start difference. First operand 8166 states and 25618 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:13,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:13,099 INFO L93 Difference]: Finished difference Result 8591 states and 26411 transitions. [2021-06-05 03:55:13,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:55:13,100 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:55:13,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:13,111 INFO L225 Difference]: With dead ends: 8591 [2021-06-05 03:55:13,111 INFO L226 Difference]: Without dead ends: 8575 [2021-06-05 03:55:13,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 286.6ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:55:13,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8575 states. [2021-06-05 03:55:13,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8575 to 8162. [2021-06-05 03:55:13,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8162 states, 8161 states have (on average 3.1371155495650043) internal successors, (25602), 8161 states have internal predecessors, (25602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:13,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8162 states to 8162 states and 25602 transitions. [2021-06-05 03:55:13,231 INFO L78 Accepts]: Start accepts. Automaton has 8162 states and 25602 transitions. Word has length 23 [2021-06-05 03:55:13,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:13,231 INFO L482 AbstractCegarLoop]: Abstraction has 8162 states and 25602 transitions. [2021-06-05 03:55:13,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:13,231 INFO L276 IsEmpty]: Start isEmpty. Operand 8162 states and 25602 transitions. [2021-06-05 03:55:13,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:55:13,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:13,240 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:13,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-06-05 03:55:13,441 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:13,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:13,441 INFO L82 PathProgramCache]: Analyzing trace with hash -412540783, now seen corresponding path program 327 times [2021-06-05 03:55:13,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:13,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218218433] [2021-06-05 03:55:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:13,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:13,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218218433] [2021-06-05 03:55:13,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218218433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:13,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300965430] [2021-06-05 03:55:13,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:13,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:55:13,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:13,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:55:13,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:13,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300965430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:13,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:13,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-05 03:55:13,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44660305] [2021-06-05 03:55:13,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:55:13,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:13,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:55:13,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:55:13,757 INFO L87 Difference]: Start difference. First operand 8162 states and 25602 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:14,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:14,147 INFO L93 Difference]: Finished difference Result 8522 states and 26260 transitions. [2021-06-05 03:55:14,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:55:14,147 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:55:14,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:14,159 INFO L225 Difference]: With dead ends: 8522 [2021-06-05 03:55:14,159 INFO L226 Difference]: Without dead ends: 8503 [2021-06-05 03:55:14,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 306.9ms TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:55:14,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8503 states. [2021-06-05 03:55:14,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8503 to 8158. [2021-06-05 03:55:14,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8158 states, 8157 states have (on average 3.136815005516734) internal successors, (25587), 8157 states have internal predecessors, (25587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:14,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8158 states to 8158 states and 25587 transitions. [2021-06-05 03:55:14,275 INFO L78 Accepts]: Start accepts. Automaton has 8158 states and 25587 transitions. Word has length 23 [2021-06-05 03:55:14,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:14,275 INFO L482 AbstractCegarLoop]: Abstraction has 8158 states and 25587 transitions. [2021-06-05 03:55:14,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:14,276 INFO L276 IsEmpty]: Start isEmpty. Operand 8158 states and 25587 transitions. [2021-06-05 03:55:14,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:55:14,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:14,285 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:14,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable616 [2021-06-05 03:55:14,486 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:14,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:14,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1452776581, now seen corresponding path program 328 times [2021-06-05 03:55:14,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:14,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828496911] [2021-06-05 03:55:14,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:14,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:14,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828496911] [2021-06-05 03:55:14,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828496911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:14,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204941066] [2021-06-05 03:55:14,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:14,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:14,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:14,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 03:55:14,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:14,768 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:14,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204941066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:14,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:14,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-05 03:55:14,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944146383] [2021-06-05 03:55:14,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:55:14,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:14,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:55:14,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:55:14,769 INFO L87 Difference]: Start difference. First operand 8158 states and 25587 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:15,112 INFO L93 Difference]: Finished difference Result 8435 states and 26072 transitions. [2021-06-05 03:55:15,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:55:15,112 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:55:15,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:15,124 INFO L225 Difference]: With dead ends: 8435 [2021-06-05 03:55:15,124 INFO L226 Difference]: Without dead ends: 8428 [2021-06-05 03:55:15,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 294.5ms TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:55:15,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8428 states. [2021-06-05 03:55:15,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8428 to 8154. [2021-06-05 03:55:15,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8154 states, 8153 states have (on average 3.1368821292775664) internal successors, (25575), 8153 states have internal predecessors, (25575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:15,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8154 states to 8154 states and 25575 transitions. [2021-06-05 03:55:15,245 INFO L78 Accepts]: Start accepts. Automaton has 8154 states and 25575 transitions. Word has length 23 [2021-06-05 03:55:15,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:15,245 INFO L482 AbstractCegarLoop]: Abstraction has 8154 states and 25575 transitions. [2021-06-05 03:55:15,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:15,245 INFO L276 IsEmpty]: Start isEmpty. Operand 8154 states and 25575 transitions. [2021-06-05 03:55:15,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:15,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:15,259 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:15,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:15,475 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:15,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:15,475 INFO L82 PathProgramCache]: Analyzing trace with hash 835429403, now seen corresponding path program 329 times [2021-06-05 03:55:15,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:15,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206436506] [2021-06-05 03:55:15,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:15,536 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:15,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:15,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206436506] [2021-06-05 03:55:15,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206436506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:15,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905789661] [2021-06-05 03:55:15,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:15,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:55:15,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:15,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:15,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:15,692 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:15,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905789661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:15,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:15,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-05 03:55:15,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146921633] [2021-06-05 03:55:15,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:55:15,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:15,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:55:15,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:15,693 INFO L87 Difference]: Start difference. First operand 8154 states and 25575 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:15,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:15,854 INFO L93 Difference]: Finished difference Result 11007 states and 33833 transitions. [2021-06-05 03:55:15,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 03:55:15,854 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:15,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:15,869 INFO L225 Difference]: With dead ends: 11007 [2021-06-05 03:55:15,869 INFO L226 Difference]: Without dead ends: 10984 [2021-06-05 03:55:15,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 234.7ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 03:55:15,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10984 states. [2021-06-05 03:55:15,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10984 to 8149. [2021-06-05 03:55:15,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8149 states, 8148 states have (on average 3.1375797741777123) internal successors, (25565), 8148 states have internal predecessors, (25565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:15,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8149 states to 8149 states and 25565 transitions. [2021-06-05 03:55:15,996 INFO L78 Accepts]: Start accepts. Automaton has 8149 states and 25565 transitions. Word has length 24 [2021-06-05 03:55:15,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:15,996 INFO L482 AbstractCegarLoop]: Abstraction has 8149 states and 25565 transitions. [2021-06-05 03:55:15,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:15,996 INFO L276 IsEmpty]: Start isEmpty. Operand 8149 states and 25565 transitions. [2021-06-05 03:55:16,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:16,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:16,005 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:16,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2021-06-05 03:55:16,205 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:16,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:16,206 INFO L82 PathProgramCache]: Analyzing trace with hash 2031355403, now seen corresponding path program 330 times [2021-06-05 03:55:16,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:16,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307262737] [2021-06-05 03:55:16,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:16,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:16,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307262737] [2021-06-05 03:55:16,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307262737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:16,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494050927] [2021-06-05 03:55:16,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:16,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:55:16,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:16,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:16,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:16,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494050927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:16,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:16,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-05 03:55:16,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385735146] [2021-06-05 03:55:16,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:55:16,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:16,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:55:16,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:16,397 INFO L87 Difference]: Start difference. First operand 8149 states and 25565 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:16,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:16,582 INFO L93 Difference]: Finished difference Result 11150 states and 34266 transitions. [2021-06-05 03:55:16,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:55:16,583 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:16,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:16,601 INFO L225 Difference]: With dead ends: 11150 [2021-06-05 03:55:16,601 INFO L226 Difference]: Without dead ends: 11150 [2021-06-05 03:55:16,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:55:16,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11150 states. [2021-06-05 03:55:16,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11150 to 8243. [2021-06-05 03:55:16,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8243 states, 8242 states have (on average 3.1360106770201406) internal successors, (25847), 8242 states have internal predecessors, (25847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:16,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8243 states to 8243 states and 25847 transitions. [2021-06-05 03:55:16,742 INFO L78 Accepts]: Start accepts. Automaton has 8243 states and 25847 transitions. Word has length 24 [2021-06-05 03:55:16,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:16,742 INFO L482 AbstractCegarLoop]: Abstraction has 8243 states and 25847 transitions. [2021-06-05 03:55:16,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:16,742 INFO L276 IsEmpty]: Start isEmpty. Operand 8243 states and 25847 transitions. [2021-06-05 03:55:16,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:16,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:16,752 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:16,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable623,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:16,952 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:16,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:16,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1049828081, now seen corresponding path program 331 times [2021-06-05 03:55:16,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:16,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334662111] [2021-06-05 03:55:16,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:16,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:17,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:17,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334662111] [2021-06-05 03:55:17,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334662111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:17,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71729710] [2021-06-05 03:55:17,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:17,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:17,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:17,133 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:17,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71729710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:17,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:17,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 03:55:17,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363657275] [2021-06-05 03:55:17,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:55:17,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:17,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:55:17,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:17,134 INFO L87 Difference]: Start difference. First operand 8243 states and 25847 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:17,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:17,871 INFO L93 Difference]: Finished difference Result 12726 states and 38747 transitions. [2021-06-05 03:55:17,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 03:55:17,871 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:17,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:17,891 INFO L225 Difference]: With dead ends: 12726 [2021-06-05 03:55:17,891 INFO L226 Difference]: Without dead ends: 12716 [2021-06-05 03:55:17,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 575.8ms TimeCoverageRelationStatistics Valid=1502, Invalid=3190, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 03:55:17,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12716 states. [2021-06-05 03:55:18,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12716 to 9550. [2021-06-05 03:55:18,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9550 states, 9549 states have (on average 3.163472614933501) internal successors, (30208), 9549 states have internal predecessors, (30208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:18,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9550 states to 9550 states and 30208 transitions. [2021-06-05 03:55:18,070 INFO L78 Accepts]: Start accepts. Automaton has 9550 states and 30208 transitions. Word has length 24 [2021-06-05 03:55:18,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:18,070 INFO L482 AbstractCegarLoop]: Abstraction has 9550 states and 30208 transitions. [2021-06-05 03:55:18,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:18,070 INFO L276 IsEmpty]: Start isEmpty. Operand 9550 states and 30208 transitions. [2021-06-05 03:55:18,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:18,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:18,082 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:18,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-06-05 03:55:18,282 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:18,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:18,282 INFO L82 PathProgramCache]: Analyzing trace with hash -478373275, now seen corresponding path program 332 times [2021-06-05 03:55:18,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:18,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818657350] [2021-06-05 03:55:18,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:18,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:18,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818657350] [2021-06-05 03:55:18,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818657350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:18,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989472730] [2021-06-05 03:55:18,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:18,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:18,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:18,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:18,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:18,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989472730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:18,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:18,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 03:55:18,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220559208] [2021-06-05 03:55:18,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:55:18,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:18,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:55:18,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:18,495 INFO L87 Difference]: Start difference. First operand 9550 states and 30208 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:19,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:19,230 INFO L93 Difference]: Finished difference Result 12601 states and 38222 transitions. [2021-06-05 03:55:19,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 03:55:19,230 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:19,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:19,249 INFO L225 Difference]: With dead ends: 12601 [2021-06-05 03:55:19,249 INFO L226 Difference]: Without dead ends: 12595 [2021-06-05 03:55:19,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 616.3ms TimeCoverageRelationStatistics Valid=1386, Invalid=4314, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 03:55:19,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12595 states. [2021-06-05 03:55:19,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12595 to 9022. [2021-06-05 03:55:19,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9022 states, 9021 states have (on average 3.1354617004766654) internal successors, (28285), 9021 states have internal predecessors, (28285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:19,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9022 states to 9022 states and 28285 transitions. [2021-06-05 03:55:19,415 INFO L78 Accepts]: Start accepts. Automaton has 9022 states and 28285 transitions. Word has length 24 [2021-06-05 03:55:19,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:19,415 INFO L482 AbstractCegarLoop]: Abstraction has 9022 states and 28285 transitions. [2021-06-05 03:55:19,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:19,415 INFO L276 IsEmpty]: Start isEmpty. Operand 9022 states and 28285 transitions. [2021-06-05 03:55:19,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:19,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:19,425 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:19,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:19,626 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:19,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:19,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1885022475, now seen corresponding path program 333 times [2021-06-05 03:55:19,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:19,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64771693] [2021-06-05 03:55:19,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:19,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:19,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:19,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64771693] [2021-06-05 03:55:19,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64771693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:19,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353498879] [2021-06-05 03:55:19,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:19,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:55:19,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:19,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:19,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:19,812 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:19,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353498879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:19,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:19,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 03:55:19,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572875955] [2021-06-05 03:55:19,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:55:19,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:19,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:55:19,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:19,813 INFO L87 Difference]: Start difference. First operand 9022 states and 28285 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:20,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:20,644 INFO L93 Difference]: Finished difference Result 11076 states and 33757 transitions. [2021-06-05 03:55:20,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 03:55:20,644 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:20,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:20,660 INFO L225 Difference]: With dead ends: 11076 [2021-06-05 03:55:20,660 INFO L226 Difference]: Without dead ends: 11076 [2021-06-05 03:55:20,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 679.0ms TimeCoverageRelationStatistics Valid=2135, Invalid=3871, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 03:55:20,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11076 states. [2021-06-05 03:55:20,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11076 to 9541. [2021-06-05 03:55:20,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9541 states, 9540 states have (on average 3.1517819706498953) internal successors, (30068), 9540 states have internal predecessors, (30068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:20,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9541 states to 9541 states and 30068 transitions. [2021-06-05 03:55:20,824 INFO L78 Accepts]: Start accepts. Automaton has 9541 states and 30068 transitions. Word has length 24 [2021-06-05 03:55:20,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:20,824 INFO L482 AbstractCegarLoop]: Abstraction has 9541 states and 30068 transitions. [2021-06-05 03:55:20,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:20,824 INFO L276 IsEmpty]: Start isEmpty. Operand 9541 states and 30068 transitions. [2021-06-05 03:55:20,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:20,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:20,835 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:21,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:21,036 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:21,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:21,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1420431371, now seen corresponding path program 334 times [2021-06-05 03:55:21,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:21,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630312832] [2021-06-05 03:55:21,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:21,097 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:21,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:21,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630312832] [2021-06-05 03:55:21,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630312832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:21,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376710183] [2021-06-05 03:55:21,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:21,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:21,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:21,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:21,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:21,223 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:21,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376710183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:21,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:21,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 03:55:21,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119034412] [2021-06-05 03:55:21,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:55:21,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:21,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:55:21,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:21,224 INFO L87 Difference]: Start difference. First operand 9541 states and 30068 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:22,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:22,067 INFO L93 Difference]: Finished difference Result 10620 states and 32666 transitions. [2021-06-05 03:55:22,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 03:55:22,067 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:22,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:22,081 INFO L225 Difference]: With dead ends: 10620 [2021-06-05 03:55:22,081 INFO L226 Difference]: Without dead ends: 10616 [2021-06-05 03:55:22,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1908 ImplicationChecksByTransitivity, 696.6ms TimeCoverageRelationStatistics Valid=2587, Invalid=4895, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 03:55:22,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10616 states. [2021-06-05 03:55:22,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10616 to 8587. [2021-06-05 03:55:22,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8587 states, 8586 states have (on average 3.1179827626368506) internal successors, (26771), 8586 states have internal predecessors, (26771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:22,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8587 states to 8587 states and 26771 transitions. [2021-06-05 03:55:22,221 INFO L78 Accepts]: Start accepts. Automaton has 8587 states and 26771 transitions. Word has length 24 [2021-06-05 03:55:22,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:22,221 INFO L482 AbstractCegarLoop]: Abstraction has 8587 states and 26771 transitions. [2021-06-05 03:55:22,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:22,221 INFO L276 IsEmpty]: Start isEmpty. Operand 8587 states and 26771 transitions. [2021-06-05 03:55:22,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:22,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:22,231 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:22,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable627 [2021-06-05 03:55:22,432 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:22,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:22,432 INFO L82 PathProgramCache]: Analyzing trace with hash 56856527, now seen corresponding path program 335 times [2021-06-05 03:55:22,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:22,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706417307] [2021-06-05 03:55:22,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:22,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:22,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706417307] [2021-06-05 03:55:22,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706417307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:22,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713034643] [2021-06-05 03:55:22,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:22,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:55:22,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:22,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:22,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:22,624 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:22,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713034643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:22,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:22,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 03:55:22,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513504679] [2021-06-05 03:55:22,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:55:22,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:22,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:55:22,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:22,625 INFO L87 Difference]: Start difference. First operand 8587 states and 26771 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:23,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:23,302 INFO L93 Difference]: Finished difference Result 11811 states and 35428 transitions. [2021-06-05 03:55:23,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 03:55:23,302 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:23,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:23,318 INFO L225 Difference]: With dead ends: 11811 [2021-06-05 03:55:23,318 INFO L226 Difference]: Without dead ends: 11802 [2021-06-05 03:55:23,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 551.1ms TimeCoverageRelationStatistics Valid=1185, Invalid=3927, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 03:55:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11802 states. [2021-06-05 03:55:23,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11802 to 8719. [2021-06-05 03:55:23,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8719 states, 8718 states have (on average 3.118261069052535) internal successors, (27185), 8718 states have internal predecessors, (27185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:23,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8719 states to 8719 states and 27185 transitions. [2021-06-05 03:55:23,473 INFO L78 Accepts]: Start accepts. Automaton has 8719 states and 27185 transitions. Word has length 24 [2021-06-05 03:55:23,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:23,473 INFO L482 AbstractCegarLoop]: Abstraction has 8719 states and 27185 transitions. [2021-06-05 03:55:23,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:23,473 INFO L276 IsEmpty]: Start isEmpty. Operand 8719 states and 27185 transitions. [2021-06-05 03:55:23,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:23,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:23,484 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:23,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable628,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:23,684 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:23,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:23,684 INFO L82 PathProgramCache]: Analyzing trace with hash -530888795, now seen corresponding path program 336 times [2021-06-05 03:55:23,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:23,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434539473] [2021-06-05 03:55:23,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:23,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:23,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434539473] [2021-06-05 03:55:23,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434539473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:23,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890486750] [2021-06-05 03:55:23,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:23,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:55:23,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:23,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:23,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:23,865 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:23,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890486750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:23,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:23,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 03:55:23,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330752768] [2021-06-05 03:55:23,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:55:23,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:23,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:55:23,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:23,866 INFO L87 Difference]: Start difference. First operand 8719 states and 27185 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:24,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:24,488 INFO L93 Difference]: Finished difference Result 11970 states and 35970 transitions. [2021-06-05 03:55:24,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 03:55:24,489 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:24,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:24,506 INFO L225 Difference]: With dead ends: 11970 [2021-06-05 03:55:24,506 INFO L226 Difference]: Without dead ends: 11958 [2021-06-05 03:55:24,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 513.7ms TimeCoverageRelationStatistics Valid=1016, Invalid=3540, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 03:55:24,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11958 states. [2021-06-05 03:55:24,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11958 to 8793. [2021-06-05 03:55:24,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8793 states, 8792 states have (on average 3.1199954504094634) internal successors, (27431), 8792 states have internal predecessors, (27431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:24,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8793 states to 8793 states and 27431 transitions. [2021-06-05 03:55:24,714 INFO L78 Accepts]: Start accepts. Automaton has 8793 states and 27431 transitions. Word has length 24 [2021-06-05 03:55:24,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:24,714 INFO L482 AbstractCegarLoop]: Abstraction has 8793 states and 27431 transitions. [2021-06-05 03:55:24,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:24,714 INFO L276 IsEmpty]: Start isEmpty. Operand 8793 states and 27431 transitions. [2021-06-05 03:55:24,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:24,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:24,725 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:24,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,340 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:24,941 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:24,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:24,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1571124593, now seen corresponding path program 337 times [2021-06-05 03:55:24,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:24,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725716079] [2021-06-05 03:55:24,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:24,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:25,022 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:25,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:25,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725716079] [2021-06-05 03:55:25,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725716079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:25,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246380301] [2021-06-05 03:55:25,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:25,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:25,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:25,144 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:25,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246380301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:25,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:25,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 03:55:25,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575740454] [2021-06-05 03:55:25,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:55:25,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:25,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:55:25,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:25,145 INFO L87 Difference]: Start difference. First operand 8793 states and 27431 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:25,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:25,668 INFO L93 Difference]: Finished difference Result 12336 states and 37268 transitions. [2021-06-05 03:55:25,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 03:55:25,668 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:25,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:25,685 INFO L225 Difference]: With dead ends: 12336 [2021-06-05 03:55:25,685 INFO L226 Difference]: Without dead ends: 12321 [2021-06-05 03:55:25,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 464.5ms TimeCoverageRelationStatistics Valid=880, Invalid=3152, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 03:55:25,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12321 states. [2021-06-05 03:55:25,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12321 to 8832. [2021-06-05 03:55:25,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8832 states, 8831 states have (on average 3.1192390442758464) internal successors, (27546), 8831 states have internal predecessors, (27546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:25,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8832 states to 8832 states and 27546 transitions. [2021-06-05 03:55:25,848 INFO L78 Accepts]: Start accepts. Automaton has 8832 states and 27546 transitions. Word has length 24 [2021-06-05 03:55:25,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:25,848 INFO L482 AbstractCegarLoop]: Abstraction has 8832 states and 27546 transitions. [2021-06-05 03:55:25,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:25,848 INFO L276 IsEmpty]: Start isEmpty. Operand 8832 states and 27546 transitions. [2021-06-05 03:55:25,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:25,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:25,859 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:26,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-06-05 03:55:26,059 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:26,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:26,059 INFO L82 PathProgramCache]: Analyzing trace with hash 541304037, now seen corresponding path program 338 times [2021-06-05 03:55:26,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:26,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916399063] [2021-06-05 03:55:26,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:26,126 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:26,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:26,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916399063] [2021-06-05 03:55:26,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916399063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:26,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110854624] [2021-06-05 03:55:26,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:26,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:26,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:26,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:26,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:26,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110854624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:26,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:26,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 03:55:26,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231631479] [2021-06-05 03:55:26,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:55:26,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:26,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:55:26,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:26,268 INFO L87 Difference]: Start difference. First operand 8832 states and 27546 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:26,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:26,755 INFO L93 Difference]: Finished difference Result 12564 states and 38035 transitions. [2021-06-05 03:55:26,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 03:55:26,755 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:26,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:26,772 INFO L225 Difference]: With dead ends: 12564 [2021-06-05 03:55:26,772 INFO L226 Difference]: Without dead ends: 12546 [2021-06-05 03:55:26,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 443.1ms TimeCoverageRelationStatistics Valid=778, Invalid=2762, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 03:55:26,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12546 states. [2021-06-05 03:55:26,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12546 to 8863. [2021-06-05 03:55:26,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8863 states, 8862 states have (on average 3.116339426765967) internal successors, (27617), 8862 states have internal predecessors, (27617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:26,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8863 states to 8863 states and 27617 transitions. [2021-06-05 03:55:26,922 INFO L78 Accepts]: Start accepts. Automaton has 8863 states and 27617 transitions. Word has length 24 [2021-06-05 03:55:26,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:26,922 INFO L482 AbstractCegarLoop]: Abstraction has 8863 states and 27617 transitions. [2021-06-05 03:55:26,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:26,922 INFO L276 IsEmpty]: Start isEmpty. Operand 8863 states and 27617 transitions. [2021-06-05 03:55:26,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:26,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:26,933 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:27,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-06-05 03:55:27,134 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:27,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:27,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1602082127, now seen corresponding path program 339 times [2021-06-05 03:55:27,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:27,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562632122] [2021-06-05 03:55:27,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:27,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:27,197 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:27,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:27,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562632122] [2021-06-05 03:55:27,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562632122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:27,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351771388] [2021-06-05 03:55:27,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:27,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:55:27,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:27,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:27,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:27,321 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:27,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351771388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:27,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:27,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 03:55:27,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270006595] [2021-06-05 03:55:27,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:55:27,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:27,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:55:27,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:27,322 INFO L87 Difference]: Start difference. First operand 8863 states and 27617 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:27,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:27,671 INFO L93 Difference]: Finished difference Result 11519 states and 34816 transitions. [2021-06-05 03:55:27,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 03:55:27,671 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:27,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:27,685 INFO L225 Difference]: With dead ends: 11519 [2021-06-05 03:55:27,686 INFO L226 Difference]: Without dead ends: 11501 [2021-06-05 03:55:27,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 350.3ms TimeCoverageRelationStatistics Valid=591, Invalid=1959, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 03:55:27,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11501 states. [2021-06-05 03:55:27,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11501 to 8863. [2021-06-05 03:55:27,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8863 states, 8862 states have (on average 3.115662378695554) internal successors, (27611), 8862 states have internal predecessors, (27611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:27,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8863 states to 8863 states and 27611 transitions. [2021-06-05 03:55:27,848 INFO L78 Accepts]: Start accepts. Automaton has 8863 states and 27611 transitions. Word has length 24 [2021-06-05 03:55:27,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:27,848 INFO L482 AbstractCegarLoop]: Abstraction has 8863 states and 27611 transitions. [2021-06-05 03:55:27,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:27,848 INFO L276 IsEmpty]: Start isEmpty. Operand 8863 states and 27611 transitions. [2021-06-05 03:55:27,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:27,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:27,858 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:28,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable632 [2021-06-05 03:55:28,059 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:28,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:28,059 INFO L82 PathProgramCache]: Analyzing trace with hash 370144463, now seen corresponding path program 340 times [2021-06-05 03:55:28,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:28,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754511022] [2021-06-05 03:55:28,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:28,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:28,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754511022] [2021-06-05 03:55:28,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754511022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:28,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941925883] [2021-06-05 03:55:28,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:28,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:28,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:28,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:28,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:28,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941925883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:28,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:28,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 03:55:28,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783824728] [2021-06-05 03:55:28,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:55:28,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:28,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:55:28,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:28,236 INFO L87 Difference]: Start difference. First operand 8863 states and 27611 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:29,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:29,120 INFO L93 Difference]: Finished difference Result 10540 states and 31822 transitions. [2021-06-05 03:55:29,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 03:55:29,121 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:29,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:29,137 INFO L225 Difference]: With dead ends: 10540 [2021-06-05 03:55:29,137 INFO L226 Difference]: Without dead ends: 10528 [2021-06-05 03:55:29,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 678.5ms TimeCoverageRelationStatistics Valid=2017, Invalid=3683, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 03:55:29,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10528 states. [2021-06-05 03:55:29,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10528 to 9379. [2021-06-05 03:55:29,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9379 states, 9378 states have (on average 3.1330774152271275) internal successors, (29382), 9378 states have internal predecessors, (29382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:29,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9379 states to 9379 states and 29382 transitions. [2021-06-05 03:55:29,294 INFO L78 Accepts]: Start accepts. Automaton has 9379 states and 29382 transitions. Word has length 24 [2021-06-05 03:55:29,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:29,294 INFO L482 AbstractCegarLoop]: Abstraction has 9379 states and 29382 transitions. [2021-06-05 03:55:29,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:29,294 INFO L276 IsEmpty]: Start isEmpty. Operand 9379 states and 29382 transitions. [2021-06-05 03:55:29,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:29,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:29,312 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:29,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable633,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:29,528 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:29,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:29,528 INFO L82 PathProgramCache]: Analyzing trace with hash -94446641, now seen corresponding path program 341 times [2021-06-05 03:55:29,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:29,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810326332] [2021-06-05 03:55:29,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:29,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:29,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810326332] [2021-06-05 03:55:29,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810326332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:29,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131429529] [2021-06-05 03:55:29,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:29,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 03:55:29,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:29,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:29,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:29,725 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:29,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131429529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:29,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:29,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 03:55:29,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465632004] [2021-06-05 03:55:29,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:55:29,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:29,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:55:29,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:29,726 INFO L87 Difference]: Start difference. First operand 9379 states and 29382 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:30,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:30,704 INFO L93 Difference]: Finished difference Result 10146 states and 30795 transitions. [2021-06-05 03:55:30,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 03:55:30,704 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:30,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:30,718 INFO L225 Difference]: With dead ends: 10146 [2021-06-05 03:55:30,719 INFO L226 Difference]: Without dead ends: 10136 [2021-06-05 03:55:30,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1977 ImplicationChecksByTransitivity, 842.8ms TimeCoverageRelationStatistics Valid=2525, Invalid=5131, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 03:55:30,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10136 states. [2021-06-05 03:55:30,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10136 to 8546. [2021-06-05 03:55:30,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8546 states, 8545 states have (on average 3.1049736688121707) internal successors, (26532), 8545 states have internal predecessors, (26532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:30,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8546 states to 8546 states and 26532 transitions. [2021-06-05 03:55:30,863 INFO L78 Accepts]: Start accepts. Automaton has 8546 states and 26532 transitions. Word has length 24 [2021-06-05 03:55:30,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:30,863 INFO L482 AbstractCegarLoop]: Abstraction has 8546 states and 26532 transitions. [2021-06-05 03:55:30,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:30,863 INFO L276 IsEmpty]: Start isEmpty. Operand 8546 states and 26532 transitions. [2021-06-05 03:55:30,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:30,955 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:30,955 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:31,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable634 [2021-06-05 03:55:31,165 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:31,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:31,165 INFO L82 PathProgramCache]: Analyzing trace with hash -128045869, now seen corresponding path program 342 times [2021-06-05 03:55:31,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:31,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950437874] [2021-06-05 03:55:31,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:31,232 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:31,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:31,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950437874] [2021-06-05 03:55:31,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950437874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:31,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218943959] [2021-06-05 03:55:31,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:31,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 03:55:31,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:31,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:31,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:31,380 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:31,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218943959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:31,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:31,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 03:55:31,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368868010] [2021-06-05 03:55:31,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:55:31,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:31,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:55:31,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:55:31,381 INFO L87 Difference]: Start difference. First operand 8546 states and 26532 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:32,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:32,272 INFO L93 Difference]: Finished difference Result 9224 states and 27859 transitions. [2021-06-05 03:55:32,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 03:55:32,273 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:32,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:32,286 INFO L225 Difference]: With dead ends: 9224 [2021-06-05 03:55:32,286 INFO L226 Difference]: Without dead ends: 9216 [2021-06-05 03:55:32,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 777.3ms TimeCoverageRelationStatistics Valid=2548, Invalid=5284, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 03:55:32,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9216 states. [2021-06-05 03:55:32,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9216 to 8570. [2021-06-05 03:55:32,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8570 states, 8569 states have (on average 3.104212860310421) internal successors, (26600), 8569 states have internal predecessors, (26600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:32,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8570 states to 8570 states and 26600 transitions. [2021-06-05 03:55:32,418 INFO L78 Accepts]: Start accepts. Automaton has 8570 states and 26600 transitions. Word has length 24 [2021-06-05 03:55:32,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:32,418 INFO L482 AbstractCegarLoop]: Abstraction has 8570 states and 26600 transitions. [2021-06-05 03:55:32,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:32,418 INFO L276 IsEmpty]: Start isEmpty. Operand 8570 states and 26600 transitions. [2021-06-05 03:55:32,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:32,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:32,429 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:32,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable635 [2021-06-05 03:55:32,644 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:32,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:32,644 INFO L82 PathProgramCache]: Analyzing trace with hash 653566347, now seen corresponding path program 343 times [2021-06-05 03:55:32,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:32,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494659743] [2021-06-05 03:55:32,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:32,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:32,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:32,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494659743] [2021-06-05 03:55:32,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494659743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:32,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652207128] [2021-06-05 03:55:32,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:32,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:32,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:32,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:32,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652207128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:32,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:32,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 03:55:32,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249959241] [2021-06-05 03:55:32,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:55:32,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:32,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:55:32,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:32,841 INFO L87 Difference]: Start difference. First operand 8570 states and 26600 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:33,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:33,719 INFO L93 Difference]: Finished difference Result 10464 states and 31357 transitions. [2021-06-05 03:55:33,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 03:55:33,720 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:33,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:33,736 INFO L225 Difference]: With dead ends: 10464 [2021-06-05 03:55:33,736 INFO L226 Difference]: Without dead ends: 10443 [2021-06-05 03:55:33,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 699.9ms TimeCoverageRelationStatistics Valid=1915, Invalid=3487, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 03:55:33,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10443 states. [2021-06-05 03:55:33,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10443 to 9099. [2021-06-05 03:55:33,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9099 states, 9098 states have (on average 3.1227742360958453) internal successors, (28411), 9098 states have internal predecessors, (28411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:33,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9099 states to 9099 states and 28411 transitions. [2021-06-05 03:55:33,907 INFO L78 Accepts]: Start accepts. Automaton has 9099 states and 28411 transitions. Word has length 24 [2021-06-05 03:55:33,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:33,907 INFO L482 AbstractCegarLoop]: Abstraction has 9099 states and 28411 transitions. [2021-06-05 03:55:33,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:33,907 INFO L276 IsEmpty]: Start isEmpty. Operand 9099 states and 28411 transitions. [2021-06-05 03:55:33,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:33,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:33,919 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:34,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:34,135 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:34,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:34,135 INFO L82 PathProgramCache]: Analyzing trace with hash 188975243, now seen corresponding path program 344 times [2021-06-05 03:55:34,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:34,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439951579] [2021-06-05 03:55:34,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:34,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:34,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:34,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439951579] [2021-06-05 03:55:34,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439951579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:34,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968051537] [2021-06-05 03:55:34,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:34,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:34,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:34,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:34,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:34,336 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:34,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968051537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:34,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:34,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 03:55:34,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906963512] [2021-06-05 03:55:34,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:55:34,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:34,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:55:34,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:34,336 INFO L87 Difference]: Start difference. First operand 9099 states and 28411 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:35,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:35,413 INFO L93 Difference]: Finished difference Result 9961 states and 30084 transitions. [2021-06-05 03:55:35,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 03:55:35,414 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:35,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:35,429 INFO L225 Difference]: With dead ends: 9961 [2021-06-05 03:55:35,429 INFO L226 Difference]: Without dead ends: 9953 [2021-06-05 03:55:35,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2214 ImplicationChecksByTransitivity, 874.1ms TimeCoverageRelationStatistics Valid=2592, Invalid=5598, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 03:55:35,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9953 states. [2021-06-05 03:55:35,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9953 to 8603. [2021-06-05 03:55:35,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8603 states, 8602 states have (on average 3.106370611485701) internal successors, (26721), 8602 states have internal predecessors, (26721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:35,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8603 states to 8603 states and 26721 transitions. [2021-06-05 03:55:35,579 INFO L78 Accepts]: Start accepts. Automaton has 8603 states and 26721 transitions. Word has length 24 [2021-06-05 03:55:35,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:35,579 INFO L482 AbstractCegarLoop]: Abstraction has 8603 states and 26721 transitions. [2021-06-05 03:55:35,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:35,579 INFO L276 IsEmpty]: Start isEmpty. Operand 8603 states and 26721 transitions. [2021-06-05 03:55:35,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:35,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:35,590 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:35,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:35,805 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:35,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:35,805 INFO L82 PathProgramCache]: Analyzing trace with hash 155376015, now seen corresponding path program 345 times [2021-06-05 03:55:35,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:35,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601190585] [2021-06-05 03:55:35,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:35,860 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:35,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:35,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601190585] [2021-06-05 03:55:35,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601190585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:35,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667753928] [2021-06-05 03:55:35,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:35,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 03:55:35,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:35,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:35,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:36,026 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:36,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667753928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:36,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:36,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-06-05 03:55:36,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040036769] [2021-06-05 03:55:36,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:55:36,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:36,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:55:36,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:55:36,027 INFO L87 Difference]: Start difference. First operand 8603 states and 26721 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:36,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:36,984 INFO L93 Difference]: Finished difference Result 9572 states and 28782 transitions. [2021-06-05 03:55:36,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 03:55:36,984 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:36,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:36,997 INFO L225 Difference]: With dead ends: 9572 [2021-06-05 03:55:36,997 INFO L226 Difference]: Without dead ends: 9556 [2021-06-05 03:55:36,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 832.8ms TimeCoverageRelationStatistics Valid=2475, Invalid=5535, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 03:55:37,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9556 states. [2021-06-05 03:55:37,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9556 to 8460. [2021-06-05 03:55:37,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8460 states, 8459 states have (on average 3.1066319895968793) internal successors, (26279), 8459 states have internal predecessors, (26279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:37,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8460 states to 8460 states and 26279 transitions. [2021-06-05 03:55:37,126 INFO L78 Accepts]: Start accepts. Automaton has 8460 states and 26279 transitions. Word has length 24 [2021-06-05 03:55:37,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:37,126 INFO L482 AbstractCegarLoop]: Abstraction has 8460 states and 26279 transitions. [2021-06-05 03:55:37,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:37,126 INFO L276 IsEmpty]: Start isEmpty. Operand 8460 states and 26279 transitions. [2021-06-05 03:55:37,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:37,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:37,136 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:37,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:37,336 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:37,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:37,336 INFO L82 PathProgramCache]: Analyzing trace with hash -886200053, now seen corresponding path program 346 times [2021-06-05 03:55:37,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:37,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261481927] [2021-06-05 03:55:37,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:37,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:37,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261481927] [2021-06-05 03:55:37,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261481927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:37,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139825113] [2021-06-05 03:55:37,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:37,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:37,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:37,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:37,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:37,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139825113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:37,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:37,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 03:55:37,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745399949] [2021-06-05 03:55:37,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:55:37,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:37,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:55:37,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:55:37,533 INFO L87 Difference]: Start difference. First operand 8460 states and 26279 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:38,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:38,381 INFO L93 Difference]: Finished difference Result 9239 states and 27893 transitions. [2021-06-05 03:55:38,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 03:55:38,382 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:38,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:38,392 INFO L225 Difference]: With dead ends: 9239 [2021-06-05 03:55:38,392 INFO L226 Difference]: Without dead ends: 9227 [2021-06-05 03:55:38,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2306 ImplicationChecksByTransitivity, 738.0ms TimeCoverageRelationStatistics Valid=2455, Invalid=5555, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 03:55:38,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9227 states. [2021-06-05 03:55:38,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9227 to 8490. [2021-06-05 03:55:38,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8490 states, 8489 states have (on average 3.107197549770291) internal successors, (26377), 8489 states have internal predecessors, (26377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:38,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8490 states to 8490 states and 26377 transitions. [2021-06-05 03:55:38,503 INFO L78 Accepts]: Start accepts. Automaton has 8490 states and 26377 transitions. Word has length 24 [2021-06-05 03:55:38,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:38,503 INFO L482 AbstractCegarLoop]: Abstraction has 8490 states and 26377 transitions. [2021-06-05 03:55:38,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:38,503 INFO L276 IsEmpty]: Start isEmpty. Operand 8490 states and 26377 transitions. [2021-06-05 03:55:38,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:38,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:38,512 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:38,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable639 [2021-06-05 03:55:38,713 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:38,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:38,713 INFO L82 PathProgramCache]: Analyzing trace with hash 849710159, now seen corresponding path program 347 times [2021-06-05 03:55:38,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:38,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802629222] [2021-06-05 03:55:38,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:38,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:38,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802629222] [2021-06-05 03:55:38,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802629222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:38,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101141410] [2021-06-05 03:55:38,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:38,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:55:38,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:38,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:38,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:38,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101141410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:38,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:38,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-06-05 03:55:38,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234112736] [2021-06-05 03:55:38,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:55:38,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:38,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:55:38,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:38,891 INFO L87 Difference]: Start difference. First operand 8490 states and 26377 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:39,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:39,598 INFO L93 Difference]: Finished difference Result 10604 states and 31742 transitions. [2021-06-05 03:55:39,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 03:55:39,598 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:39,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:39,611 INFO L225 Difference]: With dead ends: 10604 [2021-06-05 03:55:39,611 INFO L226 Difference]: Without dead ends: 10586 [2021-06-05 03:55:39,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 596.8ms TimeCoverageRelationStatistics Valid=1821, Invalid=3291, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 03:55:39,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10586 states. [2021-06-05 03:55:39,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10586 to 8963. [2021-06-05 03:55:39,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8963 states, 8962 states have (on average 3.121513055121625) internal successors, (27975), 8962 states have internal predecessors, (27975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:39,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8963 states to 8963 states and 27975 transitions. [2021-06-05 03:55:39,738 INFO L78 Accepts]: Start accepts. Automaton has 8963 states and 27975 transitions. Word has length 24 [2021-06-05 03:55:39,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:39,738 INFO L482 AbstractCegarLoop]: Abstraction has 8963 states and 27975 transitions. [2021-06-05 03:55:39,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:39,738 INFO L276 IsEmpty]: Start isEmpty. Operand 8963 states and 27975 transitions. [2021-06-05 03:55:39,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:39,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:39,748 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:39,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable640 [2021-06-05 03:55:39,948 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:39,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:39,949 INFO L82 PathProgramCache]: Analyzing trace with hash 385119055, now seen corresponding path program 348 times [2021-06-05 03:55:39,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:39,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148321277] [2021-06-05 03:55:39,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:39,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:39,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:39,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148321277] [2021-06-05 03:55:39,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148321277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:39,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255974715] [2021-06-05 03:55:39,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:40,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 03:55:40,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:40,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:40,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:40,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255974715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:40,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:40,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-06-05 03:55:40,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968323226] [2021-06-05 03:55:40,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:55:40,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:40,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:55:40,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:40,123 INFO L87 Difference]: Start difference. First operand 8963 states and 27975 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:41,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:41,067 INFO L93 Difference]: Finished difference Result 9967 states and 30031 transitions. [2021-06-05 03:55:41,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 03:55:41,068 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:41,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:41,079 INFO L225 Difference]: With dead ends: 9967 [2021-06-05 03:55:41,079 INFO L226 Difference]: Without dead ends: 9961 [2021-06-05 03:55:41,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2668 ImplicationChecksByTransitivity, 827.5ms TimeCoverageRelationStatistics Valid=2787, Invalid=6333, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 03:55:41,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2021-06-05 03:55:41,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 8724. [2021-06-05 03:55:41,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8724 states, 8723 states have (on average 3.112690588100424) internal successors, (27152), 8723 states have internal predecessors, (27152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:41,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8724 states to 8724 states and 27152 transitions. [2021-06-05 03:55:41,223 INFO L78 Accepts]: Start accepts. Automaton has 8724 states and 27152 transitions. Word has length 24 [2021-06-05 03:55:41,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:41,223 INFO L482 AbstractCegarLoop]: Abstraction has 8724 states and 27152 transitions. [2021-06-05 03:55:41,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:41,223 INFO L276 IsEmpty]: Start isEmpty. Operand 8724 states and 27152 transitions. [2021-06-05 03:55:41,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:41,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:41,233 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:41,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable641,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:41,433 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:41,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:41,433 INFO L82 PathProgramCache]: Analyzing trace with hash 351519827, now seen corresponding path program 349 times [2021-06-05 03:55:41,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:41,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043237215] [2021-06-05 03:55:41,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:41,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:41,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:41,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043237215] [2021-06-05 03:55:41,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043237215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:41,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791830364] [2021-06-05 03:55:41,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:41,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:41,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:41,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:41,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791830364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:41,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:41,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-06-05 03:55:41,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976291551] [2021-06-05 03:55:41,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:55:41,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:41,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:55:41,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:55:41,612 INFO L87 Difference]: Start difference. First operand 8724 states and 27152 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:42,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:42,530 INFO L93 Difference]: Finished difference Result 9884 states and 29758 transitions. [2021-06-05 03:55:42,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 03:55:42,530 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:42,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:42,545 INFO L225 Difference]: With dead ends: 9884 [2021-06-05 03:55:42,545 INFO L226 Difference]: Without dead ends: 9874 [2021-06-05 03:55:42,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2512 ImplicationChecksByTransitivity, 791.6ms TimeCoverageRelationStatistics Valid=2529, Invalid=6027, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 03:55:42,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9874 states. [2021-06-05 03:55:42,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9874 to 8701. [2021-06-05 03:55:42,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8701 states, 8700 states have (on average 3.1133333333333333) internal successors, (27086), 8700 states have internal predecessors, (27086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:42,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8701 states to 8701 states and 27086 transitions. [2021-06-05 03:55:42,689 INFO L78 Accepts]: Start accepts. Automaton has 8701 states and 27086 transitions. Word has length 24 [2021-06-05 03:55:42,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:42,689 INFO L482 AbstractCegarLoop]: Abstraction has 8701 states and 27086 transitions. [2021-06-05 03:55:42,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:42,689 INFO L276 IsEmpty]: Start isEmpty. Operand 8701 states and 27086 transitions. [2021-06-05 03:55:42,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:42,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:42,699 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:42,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-06-05 03:55:42,900 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:42,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:42,900 INFO L82 PathProgramCache]: Analyzing trace with hash -690056241, now seen corresponding path program 350 times [2021-06-05 03:55:42,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:42,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916934954] [2021-06-05 03:55:42,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:42,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:42,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:42,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916934954] [2021-06-05 03:55:42,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916934954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:42,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65627123] [2021-06-05 03:55:42,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:42,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:42,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:42,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:42,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:43,093 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:43,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65627123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:43,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:43,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-06-05 03:55:43,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431089961] [2021-06-05 03:55:43,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:55:43,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:43,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:55:43,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:55:43,094 INFO L87 Difference]: Start difference. First operand 8701 states and 27086 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:43,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:43,981 INFO L93 Difference]: Finished difference Result 9922 states and 29903 transitions. [2021-06-05 03:55:43,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 03:55:43,982 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:43,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:43,994 INFO L225 Difference]: With dead ends: 9922 [2021-06-05 03:55:43,994 INFO L226 Difference]: Without dead ends: 9904 [2021-06-05 03:55:43,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2457 ImplicationChecksByTransitivity, 795.9ms TimeCoverageRelationStatistics Valid=2373, Invalid=5817, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 03:55:44,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9904 states. [2021-06-05 03:55:44,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9904 to 8685. [2021-06-05 03:55:44,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8685 states, 8684 states have (on average 3.1182634730538923) internal successors, (27079), 8684 states have internal predecessors, (27079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:44,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8685 states to 8685 states and 27079 transitions. [2021-06-05 03:55:44,148 INFO L78 Accepts]: Start accepts. Automaton has 8685 states and 27079 transitions. Word has length 24 [2021-06-05 03:55:44,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:44,148 INFO L482 AbstractCegarLoop]: Abstraction has 8685 states and 27079 transitions. [2021-06-05 03:55:44,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:44,148 INFO L276 IsEmpty]: Start isEmpty. Operand 8685 states and 27079 transitions. [2021-06-05 03:55:44,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:44,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:44,158 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:44,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable643,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:44,358 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:44,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:44,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1380824019, now seen corresponding path program 351 times [2021-06-05 03:55:44,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:44,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688380666] [2021-06-05 03:55:44,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:44,417 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:44,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:44,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688380666] [2021-06-05 03:55:44,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688380666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:44,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590673689] [2021-06-05 03:55:44,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:44,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 03:55:44,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:44,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:44,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:44,560 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:44,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590673689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:44,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:44,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 03:55:44,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895073963] [2021-06-05 03:55:44,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 03:55:44,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:44,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 03:55:44,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:55:44,561 INFO L87 Difference]: Start difference. First operand 8685 states and 27079 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:45,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:45,310 INFO L93 Difference]: Finished difference Result 9621 states and 29138 transitions. [2021-06-05 03:55:45,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 03:55:45,310 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:45,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:45,322 INFO L225 Difference]: With dead ends: 9621 [2021-06-05 03:55:45,322 INFO L226 Difference]: Without dead ends: 9605 [2021-06-05 03:55:45,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 683.9ms TimeCoverageRelationStatistics Valid=2313, Invalid=5697, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 03:55:45,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9605 states. [2021-06-05 03:55:45,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9605 to 8716. [2021-06-05 03:55:45,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8716 states, 8715 states have (on average 3.119219736087206) internal successors, (27184), 8715 states have internal predecessors, (27184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:45,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8716 states to 8716 states and 27184 transitions. [2021-06-05 03:55:45,437 INFO L78 Accepts]: Start accepts. Automaton has 8716 states and 27184 transitions. Word has length 24 [2021-06-05 03:55:45,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:45,437 INFO L482 AbstractCegarLoop]: Abstraction has 8716 states and 27184 transitions. [2021-06-05 03:55:45,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:45,437 INFO L276 IsEmpty]: Start isEmpty. Operand 8716 states and 27184 transitions. [2021-06-05 03:55:45,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:45,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:45,446 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:45,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable644 [2021-06-05 03:55:45,646 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:45,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:45,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1659766261, now seen corresponding path program 352 times [2021-06-05 03:55:45,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:45,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194303274] [2021-06-05 03:55:45,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:45,684 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:45,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:45,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194303274] [2021-06-05 03:55:45,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194303274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:45,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95025346] [2021-06-05 03:55:45,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:45,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:45,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:45,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:45,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:45,824 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:45,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95025346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:45,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:45,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2021-06-05 03:55:45,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501442339] [2021-06-05 03:55:45,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:55:45,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:45,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:55:45,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:45,825 INFO L87 Difference]: Start difference. First operand 8716 states and 27184 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:46,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:46,537 INFO L93 Difference]: Finished difference Result 11348 states and 34100 transitions. [2021-06-05 03:55:46,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 03:55:46,537 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:46,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:46,551 INFO L225 Difference]: With dead ends: 11348 [2021-06-05 03:55:46,551 INFO L226 Difference]: Without dead ends: 11333 [2021-06-05 03:55:46,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 597.7ms TimeCoverageRelationStatistics Valid=1717, Invalid=3113, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 03:55:46,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11333 states. [2021-06-05 03:55:46,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11333 to 9625. [2021-06-05 03:55:46,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9625 states, 9624 states have (on average 3.1397547797173733) internal successors, (30217), 9624 states have internal predecessors, (30217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:46,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9625 states to 9625 states and 30217 transitions. [2021-06-05 03:55:46,697 INFO L78 Accepts]: Start accepts. Automaton has 9625 states and 30217 transitions. Word has length 24 [2021-06-05 03:55:46,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:46,697 INFO L482 AbstractCegarLoop]: Abstraction has 9625 states and 30217 transitions. [2021-06-05 03:55:46,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:46,697 INFO L276 IsEmpty]: Start isEmpty. Operand 9625 states and 30217 transitions. [2021-06-05 03:55:46,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:46,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:46,708 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:46,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable645,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:46,908 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:46,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:46,909 INFO L82 PathProgramCache]: Analyzing trace with hash -2124357365, now seen corresponding path program 353 times [2021-06-05 03:55:46,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:46,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100908477] [2021-06-05 03:55:46,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:46,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:46,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:46,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100908477] [2021-06-05 03:55:46,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100908477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:46,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925586889] [2021-06-05 03:55:46,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:46,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:55:46,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:46,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:46,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:47,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925586889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:47,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:47,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2021-06-05 03:55:47,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953437200] [2021-06-05 03:55:47,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:55:47,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:47,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:55:47,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:47,089 INFO L87 Difference]: Start difference. First operand 9625 states and 30217 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:48,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:48,160 INFO L93 Difference]: Finished difference Result 10893 states and 32965 transitions. [2021-06-05 03:55:48,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 03:55:48,160 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:48,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:48,173 INFO L225 Difference]: With dead ends: 10893 [2021-06-05 03:55:48,173 INFO L226 Difference]: Without dead ends: 10887 [2021-06-05 03:55:48,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3384 ImplicationChecksByTransitivity, 938.1ms TimeCoverageRelationStatistics Valid=3090, Invalid=7416, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 03:55:48,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10887 states. [2021-06-05 03:55:48,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10887 to 9443. [2021-06-05 03:55:48,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9443 states, 9442 states have (on average 3.133869942808727) internal successors, (29590), 9442 states have internal predecessors, (29590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:48,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9443 states to 9443 states and 29590 transitions. [2021-06-05 03:55:48,308 INFO L78 Accepts]: Start accepts. Automaton has 9443 states and 29590 transitions. Word has length 24 [2021-06-05 03:55:48,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:48,308 INFO L482 AbstractCegarLoop]: Abstraction has 9443 states and 29590 transitions. [2021-06-05 03:55:48,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:48,309 INFO L276 IsEmpty]: Start isEmpty. Operand 9443 states and 29590 transitions. [2021-06-05 03:55:48,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:48,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:48,320 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:48,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable646 [2021-06-05 03:55:48,520 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:48,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:48,520 INFO L82 PathProgramCache]: Analyzing trace with hash 2137010703, now seen corresponding path program 354 times [2021-06-05 03:55:48,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:48,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210325064] [2021-06-05 03:55:48,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:48,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:48,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210325064] [2021-06-05 03:55:48,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210325064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:48,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899624213] [2021-06-05 03:55:48,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:48,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:55:48,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:48,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:48,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:48,703 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:48,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899624213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:48,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:48,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 23 [2021-06-05 03:55:48,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301978893] [2021-06-05 03:55:48,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:55:48,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:48,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:55:48,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:55:48,704 INFO L87 Difference]: Start difference. First operand 9443 states and 29590 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:49,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:49,686 INFO L93 Difference]: Finished difference Result 10963 states and 33243 transitions. [2021-06-05 03:55:49,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 03:55:49,686 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:49,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:49,698 INFO L225 Difference]: With dead ends: 10963 [2021-06-05 03:55:49,699 INFO L226 Difference]: Without dead ends: 10955 [2021-06-05 03:55:49,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3015 ImplicationChecksByTransitivity, 848.4ms TimeCoverageRelationStatistics Valid=2700, Invalid=6806, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 03:55:49,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10955 states. [2021-06-05 03:55:49,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10955 to 9488. [2021-06-05 03:55:49,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9488 states, 9487 states have (on average 3.1347106566880996) internal successors, (29739), 9487 states have internal predecessors, (29739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:49,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9488 states to 9488 states and 29739 transitions. [2021-06-05 03:55:49,827 INFO L78 Accepts]: Start accepts. Automaton has 9488 states and 29739 transitions. Word has length 24 [2021-06-05 03:55:49,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:49,827 INFO L482 AbstractCegarLoop]: Abstraction has 9488 states and 29739 transitions. [2021-06-05 03:55:49,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:49,827 INFO L276 IsEmpty]: Start isEmpty. Operand 9488 states and 29739 transitions. [2021-06-05 03:55:49,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:49,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:49,837 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:50,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable647,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:50,038 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:50,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:50,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1095434635, now seen corresponding path program 355 times [2021-06-05 03:55:50,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:50,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658269953] [2021-06-05 03:55:50,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:50,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:50,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:50,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658269953] [2021-06-05 03:55:50,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658269953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:50,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539501413] [2021-06-05 03:55:50,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:50,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:50,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:50,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539501413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:50,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:50,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-06-05 03:55:50,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41432974] [2021-06-05 03:55:50,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:55:50,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:50,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:55:50,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:55:50,269 INFO L87 Difference]: Start difference. First operand 9488 states and 29739 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:51,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:51,163 INFO L93 Difference]: Finished difference Result 11074 states and 33620 transitions. [2021-06-05 03:55:51,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 03:55:51,164 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:51,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:51,176 INFO L225 Difference]: With dead ends: 11074 [2021-06-05 03:55:51,177 INFO L226 Difference]: Without dead ends: 11062 [2021-06-05 03:55:51,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 836.4ms TimeCoverageRelationStatistics Valid=2410, Invalid=6332, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 03:55:51,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11062 states. [2021-06-05 03:55:51,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11062 to 9716. [2021-06-05 03:55:51,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9716 states, 9715 states have (on average 3.138548636129696) internal successors, (30491), 9715 states have internal predecessors, (30491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:51,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9716 states to 9716 states and 30491 transitions. [2021-06-05 03:55:51,313 INFO L78 Accepts]: Start accepts. Automaton has 9716 states and 30491 transitions. Word has length 24 [2021-06-05 03:55:51,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:51,313 INFO L482 AbstractCegarLoop]: Abstraction has 9716 states and 30491 transitions. [2021-06-05 03:55:51,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:51,313 INFO L276 IsEmpty]: Start isEmpty. Operand 9716 states and 30491 transitions. [2021-06-05 03:55:51,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:51,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:51,323 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:51,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable648 [2021-06-05 03:55:51,523 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:51,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:51,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1128652401, now seen corresponding path program 356 times [2021-06-05 03:55:51,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:51,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275830762] [2021-06-05 03:55:51,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:51,576 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:51,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:51,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275830762] [2021-06-05 03:55:51,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275830762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:51,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307443946] [2021-06-05 03:55:51,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:51,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:51,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:51,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:51,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:51,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307443946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:51,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:51,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-06-05 03:55:51,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775299266] [2021-06-05 03:55:51,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 03:55:51,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:51,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 03:55:51,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:55:51,721 INFO L87 Difference]: Start difference. First operand 9716 states and 30491 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:52,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:52,572 INFO L93 Difference]: Finished difference Result 11386 states and 34650 transitions. [2021-06-05 03:55:52,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 03:55:52,573 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:52,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:52,589 INFO L225 Difference]: With dead ends: 11386 [2021-06-05 03:55:52,589 INFO L226 Difference]: Without dead ends: 11370 [2021-06-05 03:55:52,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2580 ImplicationChecksByTransitivity, 770.2ms TimeCoverageRelationStatistics Valid=2220, Invalid=5970, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 03:55:52,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11370 states. [2021-06-05 03:55:52,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11370 to 9979. [2021-06-05 03:55:52,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9979 states, 9978 states have (on average 3.1449188214070958) internal successors, (31380), 9978 states have internal predecessors, (31380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:52,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9979 states to 9979 states and 31380 transitions. [2021-06-05 03:55:52,751 INFO L78 Accepts]: Start accepts. Automaton has 9979 states and 31380 transitions. Word has length 24 [2021-06-05 03:55:52,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:52,751 INFO L482 AbstractCegarLoop]: Abstraction has 9979 states and 31380 transitions. [2021-06-05 03:55:52,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:52,751 INFO L276 IsEmpty]: Start isEmpty. Operand 9979 states and 31380 transitions. [2021-06-05 03:55:52,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:52,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:52,762 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:52,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable649,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:52,962 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:52,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:52,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1355873781, now seen corresponding path program 357 times [2021-06-05 03:55:52,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:52,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402675622] [2021-06-05 03:55:52,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:53,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:53,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402675622] [2021-06-05 03:55:53,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402675622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:53,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292772604] [2021-06-05 03:55:53,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:53,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:55:53,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:53,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:53,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:53,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292772604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:53,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:53,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-06-05 03:55:53,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108722980] [2021-06-05 03:55:53,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 03:55:53,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:53,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 03:55:53,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:55:53,224 INFO L87 Difference]: Start difference. First operand 9979 states and 31380 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:53,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:53,963 INFO L93 Difference]: Finished difference Result 11190 states and 34200 transitions. [2021-06-05 03:55:53,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 03:55:53,964 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:53,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:53,978 INFO L225 Difference]: With dead ends: 11190 [2021-06-05 03:55:53,979 INFO L226 Difference]: Without dead ends: 11170 [2021-06-05 03:55:53,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2376 ImplicationChecksByTransitivity, 745.1ms TimeCoverageRelationStatistics Valid=2129, Invalid=5703, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 03:55:53,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11170 states. [2021-06-05 03:55:54,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11170 to 10023. [2021-06-05 03:55:54,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10023 states, 10022 states have (on average 3.1446817002594294) internal successors, (31516), 10022 states have internal predecessors, (31516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:54,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10023 states to 10023 states and 31516 transitions. [2021-06-05 03:55:54,112 INFO L78 Accepts]: Start accepts. Automaton has 10023 states and 31516 transitions. Word has length 24 [2021-06-05 03:55:54,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:54,112 INFO L482 AbstractCegarLoop]: Abstraction has 10023 states and 31516 transitions. [2021-06-05 03:55:54,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:54,112 INFO L276 IsEmpty]: Start isEmpty. Operand 10023 states and 31516 transitions. [2021-06-05 03:55:54,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:54,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:54,123 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:54,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-06-05 03:55:54,323 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:54,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:54,324 INFO L82 PathProgramCache]: Analyzing trace with hash -2144123953, now seen corresponding path program 358 times [2021-06-05 03:55:54,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:54,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007828358] [2021-06-05 03:55:54,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:54,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:54,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007828358] [2021-06-05 03:55:54,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007828358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:54,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615039959] [2021-06-05 03:55:54,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:54,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:54,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:54,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:54,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:54,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615039959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:54,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:54,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 22 [2021-06-05 03:55:54,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843600140] [2021-06-05 03:55:54,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:55:54,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:54,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:55:54,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:54,495 INFO L87 Difference]: Start difference. First operand 10023 states and 31516 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:55,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:55,205 INFO L93 Difference]: Finished difference Result 14250 states and 43629 transitions. [2021-06-05 03:55:55,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 03:55:55,206 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:55,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:55,223 INFO L225 Difference]: With dead ends: 14250 [2021-06-05 03:55:55,223 INFO L226 Difference]: Without dead ends: 14238 [2021-06-05 03:55:55,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1555 ImplicationChecksByTransitivity, 572.4ms TimeCoverageRelationStatistics Valid=1679, Invalid=3151, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 03:55:55,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14238 states. [2021-06-05 03:55:55,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14238 to 11906. [2021-06-05 03:55:55,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11906 states, 11905 states have (on average 3.1850482990340194) internal successors, (37918), 11905 states have internal predecessors, (37918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:55,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11906 states to 11906 states and 37918 transitions. [2021-06-05 03:55:55,400 INFO L78 Accepts]: Start accepts. Automaton has 11906 states and 37918 transitions. Word has length 24 [2021-06-05 03:55:55,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:55,400 INFO L482 AbstractCegarLoop]: Abstraction has 11906 states and 37918 transitions. [2021-06-05 03:55:55,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:55,400 INFO L276 IsEmpty]: Start isEmpty. Operand 11906 states and 37918 transitions. [2021-06-05 03:55:55,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:55,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:55,413 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:55,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable651,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:55,614 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:55,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:55,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1686252239, now seen corresponding path program 359 times [2021-06-05 03:55:55,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:55,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016477279] [2021-06-05 03:55:55,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:55,647 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:55,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:55,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016477279] [2021-06-05 03:55:55,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016477279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:55,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075504432] [2021-06-05 03:55:55,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:55,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:55:55,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:55,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:55,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:55,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075504432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:55,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:55,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 22 [2021-06-05 03:55:55,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026271913] [2021-06-05 03:55:55,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:55:55,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:55,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:55:55,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:55,784 INFO L87 Difference]: Start difference. First operand 11906 states and 37918 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:57,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:57,048 INFO L93 Difference]: Finished difference Result 13468 states and 41406 transitions. [2021-06-05 03:55:57,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 03:55:57,048 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:57,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:57,064 INFO L225 Difference]: With dead ends: 13468 [2021-06-05 03:55:57,064 INFO L226 Difference]: Without dead ends: 13464 [2021-06-05 03:55:57,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4938 ImplicationChecksByTransitivity, 1062.2ms TimeCoverageRelationStatistics Valid=3452, Invalid=8980, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 03:55:57,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13464 states. [2021-06-05 03:55:57,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13464 to 11668. [2021-06-05 03:55:57,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11668 states, 11667 states have (on average 3.1784520442273076) internal successors, (37083), 11667 states have internal predecessors, (37083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:57,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11668 states to 11668 states and 37083 transitions. [2021-06-05 03:55:57,240 INFO L78 Accepts]: Start accepts. Automaton has 11668 states and 37083 transitions. Word has length 24 [2021-06-05 03:55:57,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:57,240 INFO L482 AbstractCegarLoop]: Abstraction has 11668 states and 37083 transitions. [2021-06-05 03:55:57,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:57,240 INFO L276 IsEmpty]: Start isEmpty. Operand 11668 states and 37083 transitions. [2021-06-05 03:55:57,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:57,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:57,253 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:57,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-06-05 03:55:57,454 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:57,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:57,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1652653011, now seen corresponding path program 360 times [2021-06-05 03:55:57,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:57,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574328775] [2021-06-05 03:55:57,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:57,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:57,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:57,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574328775] [2021-06-05 03:55:57,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574328775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:57,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046042256] [2021-06-05 03:55:57,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:57,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:55:57,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:57,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:57,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:57,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046042256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:57,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:57,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 23 [2021-06-05 03:55:57,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827519859] [2021-06-05 03:55:57,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:55:57,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:57,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:55:57,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:55:57,633 INFO L87 Difference]: Start difference. First operand 11668 states and 37083 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:58,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:58,771 INFO L93 Difference]: Finished difference Result 13667 states and 42198 transitions. [2021-06-05 03:55:58,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 03:55:58,771 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:55:58,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:58,788 INFO L225 Difference]: With dead ends: 13667 [2021-06-05 03:55:58,788 INFO L226 Difference]: Without dead ends: 13659 [2021-06-05 03:55:58,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4206 ImplicationChecksByTransitivity, 968.8ms TimeCoverageRelationStatistics Valid=2955, Invalid=7965, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 03:55:58,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13659 states. [2021-06-05 03:55:58,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13659 to 11875. [2021-06-05 03:55:58,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11875 states, 11874 states have (on average 3.1847734546067037) internal successors, (37816), 11874 states have internal predecessors, (37816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:58,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11875 states to 11875 states and 37816 transitions. [2021-06-05 03:55:58,993 INFO L78 Accepts]: Start accepts. Automaton has 11875 states and 37816 transitions. Word has length 24 [2021-06-05 03:55:58,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:58,993 INFO L482 AbstractCegarLoop]: Abstraction has 11875 states and 37816 transitions. [2021-06-05 03:55:58,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:58,993 INFO L276 IsEmpty]: Start isEmpty. Operand 11875 states and 37816 transitions. [2021-06-05 03:55:59,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:55:59,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:59,006 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:59,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2021-06-05 03:55:59,206 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:59,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:59,207 INFO L82 PathProgramCache]: Analyzing trace with hash 611076943, now seen corresponding path program 361 times [2021-06-05 03:55:59,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:59,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212052069] [2021-06-05 03:55:59,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:59,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:59,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212052069] [2021-06-05 03:55:59,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212052069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:59,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700772576] [2021-06-05 03:55:59,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:59,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:55:59,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:59,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700772576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:59,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:59,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2021-06-05 03:55:59,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958406966] [2021-06-05 03:55:59,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:55:59,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:59,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:55:59,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:55:59,392 INFO L87 Difference]: Start difference. First operand 11875 states and 37816 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:00,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:00,371 INFO L93 Difference]: Finished difference Result 14012 states and 43421 transitions. [2021-06-05 03:56:00,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 03:56:00,371 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:00,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:00,388 INFO L225 Difference]: With dead ends: 14012 [2021-06-05 03:56:00,388 INFO L226 Difference]: Without dead ends: 14000 [2021-06-05 03:56:00,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3606 ImplicationChecksByTransitivity, 849.5ms TimeCoverageRelationStatistics Valid=2546, Invalid=7156, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 03:56:00,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14000 states. [2021-06-05 03:56:00,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14000 to 12230. [2021-06-05 03:56:00,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12230 states, 12229 states have (on average 3.1900400686891817) internal successors, (39011), 12229 states have internal predecessors, (39011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:00,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12230 states to 12230 states and 39011 transitions. [2021-06-05 03:56:00,568 INFO L78 Accepts]: Start accepts. Automaton has 12230 states and 39011 transitions. Word has length 24 [2021-06-05 03:56:00,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:00,568 INFO L482 AbstractCegarLoop]: Abstraction has 12230 states and 39011 transitions. [2021-06-05 03:56:00,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:00,568 INFO L276 IsEmpty]: Start isEmpty. Operand 12230 states and 39011 transitions. [2021-06-05 03:56:00,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:00,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:00,582 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:00,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable654,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:00,782 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:00,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:00,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1613010093, now seen corresponding path program 362 times [2021-06-05 03:56:00,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:00,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900602616] [2021-06-05 03:56:00,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:00,833 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:56:00,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:00,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900602616] [2021-06-05 03:56:00,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900602616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:00,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200913342] [2021-06-05 03:56:00,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:00,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:56:00,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:00,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:00,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:00,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200913342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:00,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:00,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-06-05 03:56:00,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090010015] [2021-06-05 03:56:00,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 03:56:00,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:00,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 03:56:00,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:56:00,988 INFO L87 Difference]: Start difference. First operand 12230 states and 39011 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:01,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:01,938 INFO L93 Difference]: Finished difference Result 14528 states and 45137 transitions. [2021-06-05 03:56:01,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 03:56:01,938 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:01,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:01,956 INFO L225 Difference]: With dead ends: 14528 [2021-06-05 03:56:01,956 INFO L226 Difference]: Without dead ends: 14512 [2021-06-05 03:56:01,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3124 ImplicationChecksByTransitivity, 837.5ms TimeCoverageRelationStatistics Valid=2232, Invalid=6510, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 03:56:01,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14512 states. [2021-06-05 03:56:02,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14512 to 13019. [2021-06-05 03:56:02,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13019 states, 13018 states have (on average 3.197649408511292) internal successors, (41627), 13018 states have internal predecessors, (41627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:02,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13019 states to 13019 states and 41627 transitions. [2021-06-05 03:56:02,140 INFO L78 Accepts]: Start accepts. Automaton has 13019 states and 41627 transitions. Word has length 24 [2021-06-05 03:56:02,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:02,140 INFO L482 AbstractCegarLoop]: Abstraction has 13019 states and 41627 transitions. [2021-06-05 03:56:02,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:02,141 INFO L276 IsEmpty]: Start isEmpty. Operand 13019 states and 41627 transitions. [2021-06-05 03:56:02,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:02,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:02,156 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:02,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable655 [2021-06-05 03:56:02,357 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:02,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:02,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1840231473, now seen corresponding path program 363 times [2021-06-05 03:56:02,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:02,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896305498] [2021-06-05 03:56:02,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:56:02,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:02,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896305498] [2021-06-05 03:56:02,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896305498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:02,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490029545] [2021-06-05 03:56:02,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:02,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:56:02,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:02,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:02,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:02,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490029545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:02,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:02,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-06-05 03:56:02,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984580767] [2021-06-05 03:56:02,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 03:56:02,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:02,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 03:56:02,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:56:02,569 INFO L87 Difference]: Start difference. First operand 13019 states and 41627 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:03,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:03,427 INFO L93 Difference]: Finished difference Result 15354 states and 47888 transitions. [2021-06-05 03:56:03,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 03:56:03,427 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:03,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:03,450 INFO L225 Difference]: With dead ends: 15354 [2021-06-05 03:56:03,450 INFO L226 Difference]: Without dead ends: 15334 [2021-06-05 03:56:03,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 774.5ms TimeCoverageRelationStatistics Valid=2019, Invalid=5991, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 03:56:03,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15334 states. [2021-06-05 03:56:03,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15334 to 13814. [2021-06-05 03:56:03,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13814 states, 13813 states have (on average 3.2055310215014843) internal successors, (44278), 13813 states have internal predecessors, (44278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:03,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13814 states to 13814 states and 44278 transitions. [2021-06-05 03:56:03,654 INFO L78 Accepts]: Start accepts. Automaton has 13814 states and 44278 transitions. Word has length 24 [2021-06-05 03:56:03,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:03,654 INFO L482 AbstractCegarLoop]: Abstraction has 13814 states and 44278 transitions. [2021-06-05 03:56:03,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:03,654 INFO L276 IsEmpty]: Start isEmpty. Operand 13814 states and 44278 transitions. [2021-06-05 03:56:03,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:03,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:03,671 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:03,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable656,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:03,872 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:03,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:03,872 INFO L82 PathProgramCache]: Analyzing trace with hash -294159661, now seen corresponding path program 364 times [2021-06-05 03:56:03,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:03,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664331114] [2021-06-05 03:56:03,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:03,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:03,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664331114] [2021-06-05 03:56:03,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664331114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:03,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127490992] [2021-06-05 03:56:03,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:03,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:56:03,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:03,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:03,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:04,092 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:04,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127490992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:04,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:04,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 03:56:04,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630117293] [2021-06-05 03:56:04,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 03:56:04,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:04,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 03:56:04,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:56:04,093 INFO L87 Difference]: Start difference. First operand 13814 states and 44278 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:04,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:04,874 INFO L93 Difference]: Finished difference Result 15273 states and 47830 transitions. [2021-06-05 03:56:04,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 03:56:04,874 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:04,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:04,893 INFO L225 Difference]: With dead ends: 15273 [2021-06-05 03:56:04,893 INFO L226 Difference]: Without dead ends: 15249 [2021-06-05 03:56:04,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2434 ImplicationChecksByTransitivity, 726.1ms TimeCoverageRelationStatistics Valid=1912, Invalid=5570, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 03:56:04,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15249 states. [2021-06-05 03:56:05,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15249 to 13872. [2021-06-05 03:56:05,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13872 states, 13871 states have (on average 3.205248359887535) internal successors, (44460), 13871 states have internal predecessors, (44460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:05,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13872 states to 13872 states and 44460 transitions. [2021-06-05 03:56:05,105 INFO L78 Accepts]: Start accepts. Automaton has 13872 states and 44460 transitions. Word has length 24 [2021-06-05 03:56:05,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:05,105 INFO L482 AbstractCegarLoop]: Abstraction has 13872 states and 44460 transitions. [2021-06-05 03:56:05,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:05,105 INFO L276 IsEmpty]: Start isEmpty. Operand 13872 states and 44460 transitions. [2021-06-05 03:56:05,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:05,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:05,121 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:05,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-06-05 03:56:05,322 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:05,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:05,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1105251501, now seen corresponding path program 365 times [2021-06-05 03:56:05,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:05,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801381375] [2021-06-05 03:56:05,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:05,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:05,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801381375] [2021-06-05 03:56:05,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801381375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:05,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093075394] [2021-06-05 03:56:05,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:05,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:56:05,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:05,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:05,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:05,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093075394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:05,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:05,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-05 03:56:05,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367957879] [2021-06-05 03:56:05,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:56:05,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:05,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:56:05,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:56:05,496 INFO L87 Difference]: Start difference. First operand 13872 states and 44460 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:05,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:05,653 INFO L93 Difference]: Finished difference Result 16092 states and 50859 transitions. [2021-06-05 03:56:05,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:56:05,653 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:05,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:05,674 INFO L225 Difference]: With dead ends: 16092 [2021-06-05 03:56:05,674 INFO L226 Difference]: Without dead ends: 16092 [2021-06-05 03:56:05,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:56:05,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16092 states. [2021-06-05 03:56:05,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16092 to 13964. [2021-06-05 03:56:05,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13964 states, 13963 states have (on average 3.2041108644274154) internal successors, (44739), 13963 states have internal predecessors, (44739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:05,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13964 states to 13964 states and 44739 transitions. [2021-06-05 03:56:05,889 INFO L78 Accepts]: Start accepts. Automaton has 13964 states and 44739 transitions. Word has length 24 [2021-06-05 03:56:05,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:05,889 INFO L482 AbstractCegarLoop]: Abstraction has 13964 states and 44739 transitions. [2021-06-05 03:56:05,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:05,889 INFO L276 IsEmpty]: Start isEmpty. Operand 13964 states and 44739 transitions. [2021-06-05 03:56:05,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:05,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:05,907 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:06,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable658,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:06,107 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:06,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:06,107 INFO L82 PathProgramCache]: Analyzing trace with hash -299012217, now seen corresponding path program 366 times [2021-06-05 03:56:06,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:06,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806560416] [2021-06-05 03:56:06,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:06,188 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:06,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:06,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806560416] [2021-06-05 03:56:06,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806560416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:06,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763731990] [2021-06-05 03:56:06,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:06,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:56:06,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:06,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:06,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:06,302 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:06,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763731990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:06,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:06,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 03:56:06,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360987868] [2021-06-05 03:56:06,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:06,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:06,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:06,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:06,303 INFO L87 Difference]: Start difference. First operand 13964 states and 44739 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:06,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:06,551 INFO L93 Difference]: Finished difference Result 14987 states and 47521 transitions. [2021-06-05 03:56:06,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 03:56:06,551 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:06,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:06,571 INFO L225 Difference]: With dead ends: 14987 [2021-06-05 03:56:06,571 INFO L226 Difference]: Without dead ends: 14987 [2021-06-05 03:56:06,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 201.5ms TimeCoverageRelationStatistics Valid=418, Invalid=842, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 03:56:06,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14987 states. [2021-06-05 03:56:06,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14987 to 14007. [2021-06-05 03:56:06,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14007 states, 14006 states have (on average 3.203484221048122) internal successors, (44868), 14006 states have internal predecessors, (44868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:06,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14007 states to 14007 states and 44868 transitions. [2021-06-05 03:56:06,854 INFO L78 Accepts]: Start accepts. Automaton has 14007 states and 44868 transitions. Word has length 24 [2021-06-05 03:56:06,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:06,854 INFO L482 AbstractCegarLoop]: Abstraction has 14007 states and 44868 transitions. [2021-06-05 03:56:06,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:06,854 INFO L276 IsEmpty]: Start isEmpty. Operand 14007 states and 44868 transitions. [2021-06-05 03:56:06,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:06,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:06,871 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:07,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable659,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:07,072 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:07,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:07,072 INFO L82 PathProgramCache]: Analyzing trace with hash 549610255, now seen corresponding path program 367 times [2021-06-05 03:56:07,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:07,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155380639] [2021-06-05 03:56:07,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:07,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:07,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155380639] [2021-06-05 03:56:07,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155380639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:07,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453183564] [2021-06-05 03:56:07,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:07,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:07,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:07,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453183564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:07,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:07,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 03:56:07,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141336604] [2021-06-05 03:56:07,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:07,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:07,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:07,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:07,255 INFO L87 Difference]: Start difference. First operand 14007 states and 44868 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:07,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:07,639 INFO L93 Difference]: Finished difference Result 15501 states and 48982 transitions. [2021-06-05 03:56:07,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 03:56:07,639 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:07,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:07,660 INFO L225 Difference]: With dead ends: 15501 [2021-06-05 03:56:07,660 INFO L226 Difference]: Without dead ends: 15501 [2021-06-05 03:56:07,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 289.2ms TimeCoverageRelationStatistics Valid=677, Invalid=1393, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 03:56:07,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15501 states. [2021-06-05 03:56:07,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15501 to 14056. [2021-06-05 03:56:07,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14056 states, 14055 states have (on average 3.2027748132337246) internal successors, (45015), 14055 states have internal predecessors, (45015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:07,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14056 states to 14056 states and 45015 transitions. [2021-06-05 03:56:07,871 INFO L78 Accepts]: Start accepts. Automaton has 14056 states and 45015 transitions. Word has length 24 [2021-06-05 03:56:07,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:07,872 INFO L482 AbstractCegarLoop]: Abstraction has 14056 states and 45015 transitions. [2021-06-05 03:56:07,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:07,872 INFO L276 IsEmpty]: Start isEmpty. Operand 14056 states and 45015 transitions. [2021-06-05 03:56:07,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:07,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:07,888 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:08,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable660 [2021-06-05 03:56:08,089 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:08,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:08,089 INFO L82 PathProgramCache]: Analyzing trace with hash -2055414137, now seen corresponding path program 368 times [2021-06-05 03:56:08,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:08,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757856767] [2021-06-05 03:56:08,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:08,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:08,146 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:08,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:08,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757856767] [2021-06-05 03:56:08,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757856767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:08,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207368625] [2021-06-05 03:56:08,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:08,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:56:08,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:08,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:08,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:08,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207368625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:08,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:08,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 03:56:08,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645762912] [2021-06-05 03:56:08,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:08,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:08,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:08,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:08,257 INFO L87 Difference]: Start difference. First operand 14056 states and 45015 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:08,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:08,854 INFO L93 Difference]: Finished difference Result 15602 states and 49176 transitions. [2021-06-05 03:56:08,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 03:56:08,855 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:08,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:08,875 INFO L225 Difference]: With dead ends: 15602 [2021-06-05 03:56:08,875 INFO L226 Difference]: Without dead ends: 15602 [2021-06-05 03:56:08,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 442.0ms TimeCoverageRelationStatistics Valid=1179, Invalid=2361, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 03:56:08,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15602 states. [2021-06-05 03:56:09,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15602 to 14172. [2021-06-05 03:56:09,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14172 states, 14171 states have (on average 3.2011149530731777) internal successors, (45363), 14171 states have internal predecessors, (45363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:09,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14172 states to 14172 states and 45363 transitions. [2021-06-05 03:56:09,078 INFO L78 Accepts]: Start accepts. Automaton has 14172 states and 45363 transitions. Word has length 24 [2021-06-05 03:56:09,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:09,078 INFO L482 AbstractCegarLoop]: Abstraction has 14172 states and 45363 transitions. [2021-06-05 03:56:09,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:09,078 INFO L276 IsEmpty]: Start isEmpty. Operand 14172 states and 45363 transitions. [2021-06-05 03:56:09,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:09,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:09,095 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:09,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2021-06-05 03:56:09,305 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:09,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:09,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1169615857, now seen corresponding path program 369 times [2021-06-05 03:56:09,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:09,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728355294] [2021-06-05 03:56:09,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:09,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:09,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:09,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728355294] [2021-06-05 03:56:09,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728355294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:09,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811683175] [2021-06-05 03:56:09,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:09,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:56:09,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:09,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:09,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:09,544 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:09,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811683175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:09,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:09,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 03:56:09,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190228446] [2021-06-05 03:56:09,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:09,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:09,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:09,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:09,545 INFO L87 Difference]: Start difference. First operand 14172 states and 45363 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:10,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:10,365 INFO L93 Difference]: Finished difference Result 15707 states and 49378 transitions. [2021-06-05 03:56:10,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 03:56:10,366 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:10,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:10,392 INFO L225 Difference]: With dead ends: 15707 [2021-06-05 03:56:10,392 INFO L226 Difference]: Without dead ends: 15707 [2021-06-05 03:56:10,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 591.8ms TimeCoverageRelationStatistics Valid=1756, Invalid=3500, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 03:56:10,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15707 states. [2021-06-05 03:56:10,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15707 to 14281. [2021-06-05 03:56:10,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14281 states, 14280 states have (on average 3.1997198879551823) internal successors, (45692), 14280 states have internal predecessors, (45692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:10,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14281 states to 14281 states and 45692 transitions. [2021-06-05 03:56:10,611 INFO L78 Accepts]: Start accepts. Automaton has 14281 states and 45692 transitions. Word has length 24 [2021-06-05 03:56:10,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:10,612 INFO L482 AbstractCegarLoop]: Abstraction has 14281 states and 45692 transitions. [2021-06-05 03:56:10,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:10,612 INFO L276 IsEmpty]: Start isEmpty. Operand 14281 states and 45692 transitions. [2021-06-05 03:56:10,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:10,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:10,629 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:10,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable662 [2021-06-05 03:56:10,829 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:10,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:10,833 INFO L82 PathProgramCache]: Analyzing trace with hash 937168263, now seen corresponding path program 370 times [2021-06-05 03:56:10,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:10,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924047878] [2021-06-05 03:56:10,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:10,890 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:10,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:10,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924047878] [2021-06-05 03:56:10,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924047878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:10,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802914441] [2021-06-05 03:56:10,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:10,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:56:10,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:10,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:10,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:11,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802914441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:11,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:11,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 03:56:11,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933819170] [2021-06-05 03:56:11,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:11,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:11,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:11,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:11,006 INFO L87 Difference]: Start difference. First operand 14281 states and 45692 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:11,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:11,858 INFO L93 Difference]: Finished difference Result 15913 states and 49910 transitions. [2021-06-05 03:56:11,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 03:56:11,859 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:11,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:11,879 INFO L225 Difference]: With dead ends: 15913 [2021-06-05 03:56:11,879 INFO L226 Difference]: Without dead ends: 15913 [2021-06-05 03:56:11,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 664.7ms TimeCoverageRelationStatistics Valid=2091, Invalid=4071, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 03:56:11,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15913 states. [2021-06-05 03:56:12,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15913 to 14413. [2021-06-05 03:56:12,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14413 states, 14412 states have (on average 3.1991396058839854) internal successors, (46106), 14412 states have internal predecessors, (46106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:12,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14413 states to 14413 states and 46106 transitions. [2021-06-05 03:56:12,136 INFO L78 Accepts]: Start accepts. Automaton has 14413 states and 46106 transitions. Word has length 24 [2021-06-05 03:56:12,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:12,136 INFO L482 AbstractCegarLoop]: Abstraction has 14413 states and 46106 transitions. [2021-06-05 03:56:12,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:12,136 INFO L276 IsEmpty]: Start isEmpty. Operand 14413 states and 46106 transitions. [2021-06-05 03:56:12,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:12,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:12,152 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:12,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable663 [2021-06-05 03:56:12,352 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:12,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:12,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1211628273, now seen corresponding path program 371 times [2021-06-05 03:56:12,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:12,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533328588] [2021-06-05 03:56:12,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:12,411 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:12,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:12,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533328588] [2021-06-05 03:56:12,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533328588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:12,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717543898] [2021-06-05 03:56:12,411 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:12,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:56:12,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:12,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:12,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:12,525 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:12,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717543898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:12,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:12,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 03:56:12,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264879392] [2021-06-05 03:56:12,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:12,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:12,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:12,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:12,526 INFO L87 Difference]: Start difference. First operand 14413 states and 46106 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:13,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:13,409 INFO L93 Difference]: Finished difference Result 16226 states and 50863 transitions. [2021-06-05 03:56:13,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 03:56:13,409 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:13,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:13,433 INFO L225 Difference]: With dead ends: 16226 [2021-06-05 03:56:13,433 INFO L226 Difference]: Without dead ends: 16226 [2021-06-05 03:56:13,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 648.0ms TimeCoverageRelationStatistics Valid=2135, Invalid=3871, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 03:56:13,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16226 states. [2021-06-05 03:56:13,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16226 to 14455. [2021-06-05 03:56:13,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14455 states, 14454 states have (on average 3.204649232046492) internal successors, (46320), 14454 states have internal predecessors, (46320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:13,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14455 states to 14455 states and 46320 transitions. [2021-06-05 03:56:13,657 INFO L78 Accepts]: Start accepts. Automaton has 14455 states and 46320 transitions. Word has length 24 [2021-06-05 03:56:13,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:13,657 INFO L482 AbstractCegarLoop]: Abstraction has 14455 states and 46320 transitions. [2021-06-05 03:56:13,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:13,658 INFO L276 IsEmpty]: Start isEmpty. Operand 14455 states and 46320 transitions. [2021-06-05 03:56:13,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:13,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:13,675 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:13,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-06-05 03:56:13,875 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:13,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:13,876 INFO L82 PathProgramCache]: Analyzing trace with hash -640173467, now seen corresponding path program 372 times [2021-06-05 03:56:13,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:13,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911761670] [2021-06-05 03:56:13,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:13,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:13,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911761670] [2021-06-05 03:56:13,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911761670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:13,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123771636] [2021-06-05 03:56:13,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:13,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 03:56:13,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:13,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:13,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:14,058 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:14,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123771636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:14,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:14,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 03:56:14,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834783992] [2021-06-05 03:56:14,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:14,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:14,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:14,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:14,059 INFO L87 Difference]: Start difference. First operand 14455 states and 46320 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:14,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:14,911 INFO L93 Difference]: Finished difference Result 15474 states and 48762 transitions. [2021-06-05 03:56:14,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 03:56:14,911 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:14,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:14,932 INFO L225 Difference]: With dead ends: 15474 [2021-06-05 03:56:14,932 INFO L226 Difference]: Without dead ends: 15468 [2021-06-05 03:56:14,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 672.9ms TimeCoverageRelationStatistics Valid=2587, Invalid=4895, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 03:56:14,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15468 states. [2021-06-05 03:56:15,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15468 to 13787. [2021-06-05 03:56:15,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13787 states, 13786 states have (on average 3.198752357464094) internal successors, (44098), 13786 states have internal predecessors, (44098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:15,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13787 states to 13787 states and 44098 transitions. [2021-06-05 03:56:15,169 INFO L78 Accepts]: Start accepts. Automaton has 13787 states and 44098 transitions. Word has length 24 [2021-06-05 03:56:15,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:15,169 INFO L482 AbstractCegarLoop]: Abstraction has 13787 states and 44098 transitions. [2021-06-05 03:56:15,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:15,169 INFO L276 IsEmpty]: Start isEmpty. Operand 13787 states and 44098 transitions. [2021-06-05 03:56:15,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:15,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:15,186 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:15,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable665 [2021-06-05 03:56:15,386 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:15,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:15,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1723222283, now seen corresponding path program 373 times [2021-06-05 03:56:15,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:15,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518918494] [2021-06-05 03:56:15,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:15,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:15,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518918494] [2021-06-05 03:56:15,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518918494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:15,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643006174] [2021-06-05 03:56:15,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:15,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:15,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:15,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643006174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:15,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:15,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 03:56:15,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591763285] [2021-06-05 03:56:15,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:15,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:15,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:15,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:15,564 INFO L87 Difference]: Start difference. First operand 13787 states and 44098 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:16,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:16,248 INFO L93 Difference]: Finished difference Result 17863 states and 56145 transitions. [2021-06-05 03:56:16,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 03:56:16,248 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:16,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:16,272 INFO L225 Difference]: With dead ends: 17863 [2021-06-05 03:56:16,272 INFO L226 Difference]: Without dead ends: 17848 [2021-06-05 03:56:16,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 556.0ms TimeCoverageRelationStatistics Valid=1502, Invalid=3190, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 03:56:16,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17848 states. [2021-06-05 03:56:16,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17848 to 15969. [2021-06-05 03:56:16,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15969 states, 15968 states have (on average 3.2116107214428857) internal successors, (51283), 15968 states have internal predecessors, (51283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:16,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15969 states to 15969 states and 51283 transitions. [2021-06-05 03:56:16,526 INFO L78 Accepts]: Start accepts. Automaton has 15969 states and 51283 transitions. Word has length 24 [2021-06-05 03:56:16,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:16,526 INFO L482 AbstractCegarLoop]: Abstraction has 15969 states and 51283 transitions. [2021-06-05 03:56:16,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:16,526 INFO L276 IsEmpty]: Start isEmpty. Operand 15969 states and 51283 transitions. [2021-06-05 03:56:16,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:16,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:16,545 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:16,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-06-05 03:56:16,745 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:16,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:16,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1258631179, now seen corresponding path program 374 times [2021-06-05 03:56:16,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:16,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728546486] [2021-06-05 03:56:16,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:16,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:16,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728546486] [2021-06-05 03:56:16,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728546486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:16,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788618621] [2021-06-05 03:56:16,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:16,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:56:16,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:16,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:16,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:16,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788618621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:16,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:16,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 03:56:16,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905227595] [2021-06-05 03:56:16,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:16,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:16,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:16,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:16,930 INFO L87 Difference]: Start difference. First operand 15969 states and 51283 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:17,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:17,672 INFO L93 Difference]: Finished difference Result 17633 states and 55417 transitions. [2021-06-05 03:56:17,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 03:56:17,673 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:17,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:17,695 INFO L225 Difference]: With dead ends: 17633 [2021-06-05 03:56:17,695 INFO L226 Difference]: Without dead ends: 17629 [2021-06-05 03:56:17,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 606.9ms TimeCoverageRelationStatistics Valid=1386, Invalid=4314, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 03:56:17,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17629 states. [2021-06-05 03:56:17,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17629 to 15243. [2021-06-05 03:56:17,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15243 states, 15242 states have (on average 3.1953811835717096) internal successors, (48704), 15242 states have internal predecessors, (48704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:17,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15243 states to 15243 states and 48704 transitions. [2021-06-05 03:56:17,926 INFO L78 Accepts]: Start accepts. Automaton has 15243 states and 48704 transitions. Word has length 24 [2021-06-05 03:56:17,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:17,926 INFO L482 AbstractCegarLoop]: Abstraction has 15243 states and 48704 transitions. [2021-06-05 03:56:17,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:17,927 INFO L276 IsEmpty]: Start isEmpty. Operand 15243 states and 48704 transitions. [2021-06-05 03:56:17,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:17,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:17,944 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:18,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable667 [2021-06-05 03:56:18,145 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:18,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:18,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1225031951, now seen corresponding path program 375 times [2021-06-05 03:56:18,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:18,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874832989] [2021-06-05 03:56:18,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:18,204 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:18,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:18,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874832989] [2021-06-05 03:56:18,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874832989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:18,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846103727] [2021-06-05 03:56:18,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:18,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:56:18,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:18,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:18,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:18,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846103727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:18,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:18,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 03:56:18,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615336015] [2021-06-05 03:56:18,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:18,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:18,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:18,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:18,325 INFO L87 Difference]: Start difference. First operand 15243 states and 48704 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:18,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:18,985 INFO L93 Difference]: Finished difference Result 17307 states and 54169 transitions. [2021-06-05 03:56:18,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 03:56:18,985 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:18,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:19,007 INFO L225 Difference]: With dead ends: 17307 [2021-06-05 03:56:19,007 INFO L226 Difference]: Without dead ends: 17299 [2021-06-05 03:56:19,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 530.4ms TimeCoverageRelationStatistics Valid=1185, Invalid=3927, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 03:56:19,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17299 states. [2021-06-05 03:56:19,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17299 to 15525. [2021-06-05 03:56:19,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15525 states, 15524 states have (on average 3.1944730739500127) internal successors, (49591), 15524 states have internal predecessors, (49591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:19,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15525 states to 15525 states and 49591 transitions. [2021-06-05 03:56:19,243 INFO L78 Accepts]: Start accepts. Automaton has 15525 states and 49591 transitions. Word has length 24 [2021-06-05 03:56:19,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:19,243 INFO L482 AbstractCegarLoop]: Abstraction has 15525 states and 49591 transitions. [2021-06-05 03:56:19,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:19,243 INFO L276 IsEmpty]: Start isEmpty. Operand 15525 states and 49591 transitions. [2021-06-05 03:56:19,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:19,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:19,261 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:19,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable668,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:19,461 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:19,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:19,461 INFO L82 PathProgramCache]: Analyzing trace with hash 183455883, now seen corresponding path program 376 times [2021-06-05 03:56:19,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:19,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743664043] [2021-06-05 03:56:19,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:19,518 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:19,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:19,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743664043] [2021-06-05 03:56:19,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743664043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:19,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763788615] [2021-06-05 03:56:19,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:19,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:56:19,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:19,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:19,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:19,637 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:19,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763788615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:19,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:19,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 03:56:19,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12503489] [2021-06-05 03:56:19,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:19,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:19,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:19,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:19,638 INFO L87 Difference]: Start difference. First operand 15525 states and 49591 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:20,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:20,265 INFO L93 Difference]: Finished difference Result 17843 states and 55959 transitions. [2021-06-05 03:56:20,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 03:56:20,265 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:20,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:20,287 INFO L225 Difference]: With dead ends: 17843 [2021-06-05 03:56:20,288 INFO L226 Difference]: Without dead ends: 17831 [2021-06-05 03:56:20,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 518.8ms TimeCoverageRelationStatistics Valid=1016, Invalid=3540, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 03:56:20,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17831 states. [2021-06-05 03:56:20,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17831 to 15785. [2021-06-05 03:56:20,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15785 states, 15784 states have (on average 3.192663456664977) internal successors, (50393), 15784 states have internal predecessors, (50393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:20,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15785 states to 15785 states and 50393 transitions. [2021-06-05 03:56:20,527 INFO L78 Accepts]: Start accepts. Automaton has 15785 states and 50393 transitions. Word has length 24 [2021-06-05 03:56:20,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:20,528 INFO L482 AbstractCegarLoop]: Abstraction has 15785 states and 50393 transitions. [2021-06-05 03:56:20,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:20,528 INFO L276 IsEmpty]: Start isEmpty. Operand 15785 states and 50393 transitions. [2021-06-05 03:56:20,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:20,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:20,548 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:20,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:20,749 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:20,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:20,749 INFO L82 PathProgramCache]: Analyzing trace with hash -2040631153, now seen corresponding path program 377 times [2021-06-05 03:56:20,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:20,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770145726] [2021-06-05 03:56:20,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:20,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:20,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:20,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770145726] [2021-06-05 03:56:20,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770145726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:20,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348081906] [2021-06-05 03:56:20,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:20,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:56:20,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:20,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:20,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:20,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348081906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:20,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:20,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 03:56:20,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604745808] [2021-06-05 03:56:20,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:20,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:20,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:20,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:20,925 INFO L87 Difference]: Start difference. First operand 15785 states and 50393 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:21,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:21,461 INFO L93 Difference]: Finished difference Result 18546 states and 58331 transitions. [2021-06-05 03:56:21,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 03:56:21,462 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:21,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:21,485 INFO L225 Difference]: With dead ends: 18546 [2021-06-05 03:56:21,486 INFO L226 Difference]: Without dead ends: 18530 [2021-06-05 03:56:21,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 448.6ms TimeCoverageRelationStatistics Valid=880, Invalid=3152, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 03:56:21,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18530 states. [2021-06-05 03:56:21,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18530 to 15941. [2021-06-05 03:56:21,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15941 states, 15940 states have (on average 3.1888331242158094) internal successors, (50830), 15940 states have internal predecessors, (50830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:21,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15941 states to 15941 states and 50830 transitions. [2021-06-05 03:56:21,723 INFO L78 Accepts]: Start accepts. Automaton has 15941 states and 50830 transitions. Word has length 24 [2021-06-05 03:56:21,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:21,723 INFO L482 AbstractCegarLoop]: Abstraction has 15941 states and 50830 transitions. [2021-06-05 03:56:21,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:21,723 INFO L276 IsEmpty]: Start isEmpty. Operand 15941 states and 50830 transitions. [2021-06-05 03:56:21,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:21,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:21,741 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:21,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable670,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:21,942 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:21,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:21,942 INFO L82 PathProgramCache]: Analyzing trace with hash 2027114763, now seen corresponding path program 378 times [2021-06-05 03:56:21,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:21,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372654727] [2021-06-05 03:56:21,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:21,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:22,000 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:22,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:22,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372654727] [2021-06-05 03:56:22,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372654727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:22,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048757520] [2021-06-05 03:56:22,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:22,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:56:22,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:22,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:22,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:22,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048757520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:22,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:22,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 03:56:22,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971798032] [2021-06-05 03:56:22,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:22,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:22,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:22,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:22,125 INFO L87 Difference]: Start difference. First operand 15941 states and 50830 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:22,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:22,643 INFO L93 Difference]: Finished difference Result 18841 states and 59191 transitions. [2021-06-05 03:56:22,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 03:56:22,644 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:22,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:22,668 INFO L225 Difference]: With dead ends: 18841 [2021-06-05 03:56:22,668 INFO L226 Difference]: Without dead ends: 18821 [2021-06-05 03:56:22,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 462.6ms TimeCoverageRelationStatistics Valid=778, Invalid=2762, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 03:56:22,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18821 states. [2021-06-05 03:56:22,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18821 to 15970. [2021-06-05 03:56:22,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15970 states, 15969 states have (on average 3.1873003945143714) internal successors, (50898), 15969 states have internal predecessors, (50898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:22,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15970 states to 15970 states and 50898 transitions. [2021-06-05 03:56:22,923 INFO L78 Accepts]: Start accepts. Automaton has 15970 states and 50898 transitions. Word has length 24 [2021-06-05 03:56:22,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:22,923 INFO L482 AbstractCegarLoop]: Abstraction has 15970 states and 50898 transitions. [2021-06-05 03:56:22,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:22,923 INFO L276 IsEmpty]: Start isEmpty. Operand 15970 states and 50898 transitions. [2021-06-05 03:56:22,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:22,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:22,942 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:23,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:23,142 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:23,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:23,142 INFO L82 PathProgramCache]: Analyzing trace with hash -721780721, now seen corresponding path program 379 times [2021-06-05 03:56:23,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:23,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201492976] [2021-06-05 03:56:23,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:23,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:23,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201492976] [2021-06-05 03:56:23,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201492976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:23,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729904203] [2021-06-05 03:56:23,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:23,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:23,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:23,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:23,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729904203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:23,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:23,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 03:56:23,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179651690] [2021-06-05 03:56:23,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:23,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:23,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:23,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:23,323 INFO L87 Difference]: Start difference. First operand 15970 states and 50898 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:23,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:23,679 INFO L93 Difference]: Finished difference Result 17288 states and 54299 transitions. [2021-06-05 03:56:23,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 03:56:23,679 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:23,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:23,701 INFO L225 Difference]: With dead ends: 17288 [2021-06-05 03:56:23,701 INFO L226 Difference]: Without dead ends: 17276 [2021-06-05 03:56:23,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 334.8ms TimeCoverageRelationStatistics Valid=591, Invalid=1959, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 03:56:23,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17276 states. [2021-06-05 03:56:23,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17276 to 15970. [2021-06-05 03:56:23,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15970 states, 15969 states have (on average 3.186924666541424) internal successors, (50892), 15969 states have internal predecessors, (50892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:23,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15970 states to 15970 states and 50892 transitions. [2021-06-05 03:56:23,937 INFO L78 Accepts]: Start accepts. Automaton has 15970 states and 50892 transitions. Word has length 24 [2021-06-05 03:56:23,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:23,937 INFO L482 AbstractCegarLoop]: Abstraction has 15970 states and 50892 transitions. [2021-06-05 03:56:23,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:23,937 INFO L276 IsEmpty]: Start isEmpty. Operand 15970 states and 50892 transitions. [2021-06-05 03:56:23,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:23,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:23,956 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:24,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-06-05 03:56:24,156 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:24,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:24,157 INFO L82 PathProgramCache]: Analyzing trace with hash -731252469, now seen corresponding path program 380 times [2021-06-05 03:56:24,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:24,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442233718] [2021-06-05 03:56:24,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:24,218 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:24,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:24,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442233718] [2021-06-05 03:56:24,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442233718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:24,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400479428] [2021-06-05 03:56:24,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:24,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:56:24,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:24,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:24,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:24,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400479428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:24,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:24,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-05 03:56:24,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650982287] [2021-06-05 03:56:24,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:56:24,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:24,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:56:24,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:56:24,331 INFO L87 Difference]: Start difference. First operand 15970 states and 50892 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:24,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:24,486 INFO L93 Difference]: Finished difference Result 17070 states and 53913 transitions. [2021-06-05 03:56:24,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:56:24,487 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:24,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:24,509 INFO L225 Difference]: With dead ends: 17070 [2021-06-05 03:56:24,509 INFO L226 Difference]: Without dead ends: 17056 [2021-06-05 03:56:24,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 03:56:24,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17056 states. [2021-06-05 03:56:24,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17056 to 15970. [2021-06-05 03:56:24,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15970 states, 15969 states have (on average 3.1868620452125995) internal successors, (50891), 15969 states have internal predecessors, (50891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:24,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15970 states to 15970 states and 50891 transitions. [2021-06-05 03:56:24,778 INFO L78 Accepts]: Start accepts. Automaton has 15970 states and 50891 transitions. Word has length 24 [2021-06-05 03:56:24,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:24,778 INFO L482 AbstractCegarLoop]: Abstraction has 15970 states and 50891 transitions. [2021-06-05 03:56:24,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:24,778 INFO L276 IsEmpty]: Start isEmpty. Operand 15970 states and 50891 transitions. [2021-06-05 03:56:24,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:24,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:24,798 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:24,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2021-06-05 03:56:24,998 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:24,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:24,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1075398189, now seen corresponding path program 381 times [2021-06-05 03:56:24,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:24,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319430492] [2021-06-05 03:56:24,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:25,057 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:25,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:25,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319430492] [2021-06-05 03:56:25,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319430492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:25,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854847174] [2021-06-05 03:56:25,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:25,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:56:25,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:25,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:25,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:25,179 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:25,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854847174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:25,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:25,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 03:56:25,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803197899] [2021-06-05 03:56:25,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:56:25,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:25,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:56:25,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:56:25,180 INFO L87 Difference]: Start difference. First operand 15970 states and 50891 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:25,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:25,729 INFO L93 Difference]: Finished difference Result 17305 states and 54554 transitions. [2021-06-05 03:56:25,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 03:56:25,729 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:25,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:25,752 INFO L225 Difference]: With dead ends: 17305 [2021-06-05 03:56:25,752 INFO L226 Difference]: Without dead ends: 17305 [2021-06-05 03:56:25,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 450.3ms TimeCoverageRelationStatistics Valid=1224, Invalid=2558, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 03:56:25,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17305 states. [2021-06-05 03:56:25,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17305 to 16020. [2021-06-05 03:56:25,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16020 states, 16019 states have (on average 3.1862787939322055) internal successors, (51041), 16019 states have internal predecessors, (51041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:25,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16020 states to 16020 states and 51041 transitions. [2021-06-05 03:56:25,991 INFO L78 Accepts]: Start accepts. Automaton has 16020 states and 51041 transitions. Word has length 24 [2021-06-05 03:56:25,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:25,991 INFO L482 AbstractCegarLoop]: Abstraction has 16020 states and 51041 transitions. [2021-06-05 03:56:25,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:25,991 INFO L276 IsEmpty]: Start isEmpty. Operand 16020 states and 51041 transitions. [2021-06-05 03:56:26,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:26,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:26,009 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:26,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable674,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:26,212 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:26,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:26,212 INFO L82 PathProgramCache]: Analyzing trace with hash 310717139, now seen corresponding path program 382 times [2021-06-05 03:56:26,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:26,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043425477] [2021-06-05 03:56:26,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:26,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:26,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043425477] [2021-06-05 03:56:26,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043425477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:26,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902145996] [2021-06-05 03:56:26,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:26,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:56:26,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:26,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:26,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:26,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902145996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:26,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:26,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 03:56:26,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888339822] [2021-06-05 03:56:26,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:26,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:26,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:26,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:26,385 INFO L87 Difference]: Start difference. First operand 16020 states and 51041 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:26,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:26,912 INFO L93 Difference]: Finished difference Result 17722 states and 55602 transitions. [2021-06-05 03:56:26,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 03:56:26,913 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:26,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:26,936 INFO L225 Difference]: With dead ends: 17722 [2021-06-05 03:56:26,936 INFO L226 Difference]: Without dead ends: 17708 [2021-06-05 03:56:26,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 397.3ms TimeCoverageRelationStatistics Valid=944, Invalid=2026, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 03:56:26,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17708 states. [2021-06-05 03:56:27,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17708 to 16053. [2021-06-05 03:56:27,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16053 states, 16052 states have (on average 3.185771243458759) internal successors, (51138), 16052 states have internal predecessors, (51138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:27,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16053 states to 16053 states and 51138 transitions. [2021-06-05 03:56:27,227 INFO L78 Accepts]: Start accepts. Automaton has 16053 states and 51138 transitions. Word has length 24 [2021-06-05 03:56:27,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:27,227 INFO L482 AbstractCegarLoop]: Abstraction has 16053 states and 51138 transitions. [2021-06-05 03:56:27,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:27,227 INFO L276 IsEmpty]: Start isEmpty. Operand 16053 states and 51138 transitions. [2021-06-05 03:56:27,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:27,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:27,246 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:27,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-06-05 03:56:27,447 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:27,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:27,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1445684781, now seen corresponding path program 383 times [2021-06-05 03:56:27,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:27,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458613269] [2021-06-05 03:56:27,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:27,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:27,503 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:27,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:27,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458613269] [2021-06-05 03:56:27,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458613269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:27,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103051385] [2021-06-05 03:56:27,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:27,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:56:27,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:27,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:27,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:27,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103051385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:27,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:27,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 03:56:27,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54259781] [2021-06-05 03:56:27,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:27,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:27,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:27,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:27,632 INFO L87 Difference]: Start difference. First operand 16053 states and 51138 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:28,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:28,157 INFO L93 Difference]: Finished difference Result 17524 states and 54984 transitions. [2021-06-05 03:56:28,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 03:56:28,157 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:28,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:28,181 INFO L225 Difference]: With dead ends: 17524 [2021-06-05 03:56:28,181 INFO L226 Difference]: Without dead ends: 17506 [2021-06-05 03:56:28,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 398.3ms TimeCoverageRelationStatistics Valid=862, Invalid=1894, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 03:56:28,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17506 states. [2021-06-05 03:56:28,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17506 to 16094. [2021-06-05 03:56:28,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16094 states, 16093 states have (on average 3.1848008450879264) internal successors, (51253), 16093 states have internal predecessors, (51253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:28,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16094 states to 16094 states and 51253 transitions. [2021-06-05 03:56:28,442 INFO L78 Accepts]: Start accepts. Automaton has 16094 states and 51253 transitions. Word has length 24 [2021-06-05 03:56:28,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:28,442 INFO L482 AbstractCegarLoop]: Abstraction has 16094 states and 51253 transitions. [2021-06-05 03:56:28,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:28,442 INFO L276 IsEmpty]: Start isEmpty. Operand 16094 states and 51253 transitions. [2021-06-05 03:56:28,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:28,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:28,462 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:28,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable676,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:28,662 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:28,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:28,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1130056403, now seen corresponding path program 384 times [2021-06-05 03:56:28,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:28,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968629414] [2021-06-05 03:56:28,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:28,713 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:28,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:28,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968629414] [2021-06-05 03:56:28,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968629414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:28,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993789643] [2021-06-05 03:56:28,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:28,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:56:28,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:28,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:28,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:28,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993789643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:28,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:28,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 03:56:28,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532124223] [2021-06-05 03:56:28,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:28,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:28,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:28,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:28,832 INFO L87 Difference]: Start difference. First operand 16094 states and 51253 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:29,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:29,541 INFO L93 Difference]: Finished difference Result 17741 states and 55478 transitions. [2021-06-05 03:56:29,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 03:56:29,541 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:29,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:29,564 INFO L225 Difference]: With dead ends: 17741 [2021-06-05 03:56:29,564 INFO L226 Difference]: Without dead ends: 17731 [2021-06-05 03:56:29,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 542.3ms TimeCoverageRelationStatistics Valid=1433, Invalid=2989, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 03:56:29,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17731 states. [2021-06-05 03:56:29,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17731 to 16203. [2021-06-05 03:56:29,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16203 states, 16202 states have (on average 3.1827552154055057) internal successors, (51567), 16202 states have internal predecessors, (51567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16203 states to 16203 states and 51567 transitions. [2021-06-05 03:56:29,799 INFO L78 Accepts]: Start accepts. Automaton has 16203 states and 51567 transitions. Word has length 24 [2021-06-05 03:56:29,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:29,799 INFO L482 AbstractCegarLoop]: Abstraction has 16203 states and 51567 transitions. [2021-06-05 03:56:29,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:29,799 INFO L276 IsEmpty]: Start isEmpty. Operand 16203 states and 51567 transitions. [2021-06-05 03:56:29,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:29,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:29,817 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:30,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable677 [2021-06-05 03:56:30,018 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:30,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:30,018 INFO L82 PathProgramCache]: Analyzing trace with hash -172328493, now seen corresponding path program 385 times [2021-06-05 03:56:30,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:30,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945446857] [2021-06-05 03:56:30,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:30,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:30,069 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:30,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:30,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945446857] [2021-06-05 03:56:30,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945446857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:30,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521086119] [2021-06-05 03:56:30,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:30,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:30,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:30,184 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:30,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521086119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:30,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:30,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 03:56:30,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855760279] [2021-06-05 03:56:30,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:30,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:30,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:30,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:30,185 INFO L87 Difference]: Start difference. First operand 16203 states and 51567 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:31,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:31,047 INFO L93 Difference]: Finished difference Result 18351 states and 57209 transitions. [2021-06-05 03:56:31,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 03:56:31,048 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:31,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:31,071 INFO L225 Difference]: With dead ends: 18351 [2021-06-05 03:56:31,071 INFO L226 Difference]: Without dead ends: 18347 [2021-06-05 03:56:31,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 680.3ms TimeCoverageRelationStatistics Valid=1920, Invalid=3780, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 03:56:31,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18347 states. [2021-06-05 03:56:31,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18347 to 16270. [2021-06-05 03:56:31,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16270 states, 16269 states have (on average 3.1803429835884196) internal successors, (51741), 16269 states have internal predecessors, (51741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:31,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16270 states to 16270 states and 51741 transitions. [2021-06-05 03:56:31,314 INFO L78 Accepts]: Start accepts. Automaton has 16270 states and 51741 transitions. Word has length 24 [2021-06-05 03:56:31,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:31,314 INFO L482 AbstractCegarLoop]: Abstraction has 16270 states and 51741 transitions. [2021-06-05 03:56:31,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:31,314 INFO L276 IsEmpty]: Start isEmpty. Operand 16270 states and 51741 transitions. [2021-06-05 03:56:31,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:31,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:31,333 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:31,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable678,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:31,533 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:31,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:31,533 INFO L82 PathProgramCache]: Analyzing trace with hash -214340909, now seen corresponding path program 386 times [2021-06-05 03:56:31,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:31,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35509276] [2021-06-05 03:56:31,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:31,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:31,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:31,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35509276] [2021-06-05 03:56:31,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35509276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:31,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278400191] [2021-06-05 03:56:31,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:31,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:56:31,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:31,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:31,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:31,701 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:31,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278400191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:31,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:31,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 03:56:31,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316342827] [2021-06-05 03:56:31,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:31,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:31,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:31,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:31,702 INFO L87 Difference]: Start difference. First operand 16270 states and 51741 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:32,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:32,494 INFO L93 Difference]: Finished difference Result 18812 states and 58615 transitions. [2021-06-05 03:56:32,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 03:56:32,494 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:32,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:32,518 INFO L225 Difference]: With dead ends: 18812 [2021-06-05 03:56:32,518 INFO L226 Difference]: Without dead ends: 18812 [2021-06-05 03:56:32,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 624.3ms TimeCoverageRelationStatistics Valid=2017, Invalid=3683, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 03:56:32,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18812 states. [2021-06-05 03:56:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18812 to 16419. [2021-06-05 03:56:32,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16419 states, 16418 states have (on average 3.188451699354367) internal successors, (52348), 16418 states have internal predecessors, (52348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:32,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16419 states to 16419 states and 52348 transitions. [2021-06-05 03:56:32,770 INFO L78 Accepts]: Start accepts. Automaton has 16419 states and 52348 transitions. Word has length 24 [2021-06-05 03:56:32,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:32,770 INFO L482 AbstractCegarLoop]: Abstraction has 16419 states and 52348 transitions. [2021-06-05 03:56:32,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:32,770 INFO L276 IsEmpty]: Start isEmpty. Operand 16419 states and 52348 transitions. [2021-06-05 03:56:32,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:32,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:32,789 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:32,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable679 [2021-06-05 03:56:32,989 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:32,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:32,989 INFO L82 PathProgramCache]: Analyzing trace with hash 357113897, now seen corresponding path program 387 times [2021-06-05 03:56:32,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:32,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652672788] [2021-06-05 03:56:32,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:56:33,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:33,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652672788] [2021-06-05 03:56:33,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652672788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:33,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479022719] [2021-06-05 03:56:33,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:33,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 03:56:33,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:33,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:33,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:33,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479022719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:33,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:33,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 03:56:33,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164815176] [2021-06-05 03:56:33,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:33,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:33,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:33,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:33,169 INFO L87 Difference]: Start difference. First operand 16419 states and 52348 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:34,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:34,096 INFO L93 Difference]: Finished difference Result 17894 states and 55882 transitions. [2021-06-05 03:56:34,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 03:56:34,096 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:34,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:34,119 INFO L225 Difference]: With dead ends: 17894 [2021-06-05 03:56:34,119 INFO L226 Difference]: Without dead ends: 17879 [2021-06-05 03:56:34,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1989 ImplicationChecksByTransitivity, 749.3ms TimeCoverageRelationStatistics Valid=2525, Invalid=5131, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 03:56:34,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17879 states. [2021-06-05 03:56:34,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17879 to 15868. [2021-06-05 03:56:34,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15868 states, 15867 states have (on average 3.1803743618831537) internal successors, (50463), 15867 states have internal predecessors, (50463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:34,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15868 states to 15868 states and 50463 transitions. [2021-06-05 03:56:34,360 INFO L78 Accepts]: Start accepts. Automaton has 15868 states and 50463 transitions. Word has length 24 [2021-06-05 03:56:34,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:34,360 INFO L482 AbstractCegarLoop]: Abstraction has 15868 states and 50463 transitions. [2021-06-05 03:56:34,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:34,360 INFO L276 IsEmpty]: Start isEmpty. Operand 15868 states and 50463 transitions. [2021-06-05 03:56:34,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:34,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:34,380 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:34,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:34,580 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:34,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:34,580 INFO L82 PathProgramCache]: Analyzing trace with hash 892343699, now seen corresponding path program 388 times [2021-06-05 03:56:34,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:34,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243146775] [2021-06-05 03:56:34,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:34,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:34,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243146775] [2021-06-05 03:56:34,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243146775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:34,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193463327] [2021-06-05 03:56:34,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:34,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:56:34,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:34,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:34,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:34,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193463327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:34,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:34,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 03:56:34,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252464452] [2021-06-05 03:56:34,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:56:34,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:34,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:56:34,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:56:34,795 INFO L87 Difference]: Start difference. First operand 15868 states and 50463 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:35,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:35,609 INFO L93 Difference]: Finished difference Result 17262 states and 53968 transitions. [2021-06-05 03:56:35,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 03:56:35,610 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:35,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:35,633 INFO L225 Difference]: With dead ends: 17262 [2021-06-05 03:56:35,634 INFO L226 Difference]: Without dead ends: 17250 [2021-06-05 03:56:35,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2152 ImplicationChecksByTransitivity, 685.8ms TimeCoverageRelationStatistics Valid=2548, Invalid=5284, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 03:56:35,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17250 states. [2021-06-05 03:56:35,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17250 to 15928. [2021-06-05 03:56:35,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15928 states, 15927 states have (on average 3.1800087901048535) internal successors, (50648), 15927 states have internal predecessors, (50648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:35,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15928 states to 15928 states and 50648 transitions. [2021-06-05 03:56:35,876 INFO L78 Accepts]: Start accepts. Automaton has 15928 states and 50648 transitions. Word has length 24 [2021-06-05 03:56:35,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:35,876 INFO L482 AbstractCegarLoop]: Abstraction has 15928 states and 50648 transitions. [2021-06-05 03:56:35,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:35,876 INFO L276 IsEmpty]: Start isEmpty. Operand 15928 states and 50648 transitions. [2021-06-05 03:56:35,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:35,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:35,895 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:36,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable681,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:36,095 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:36,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:36,096 INFO L82 PathProgramCache]: Analyzing trace with hash 626440455, now seen corresponding path program 389 times [2021-06-05 03:56:36,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:36,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748510015] [2021-06-05 03:56:36,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:36,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:36,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748510015] [2021-06-05 03:56:36,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748510015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:36,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354614137] [2021-06-05 03:56:36,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:36,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:56:36,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:36,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:36,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:36,288 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:36,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354614137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:36,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:36,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 03:56:36,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92085896] [2021-06-05 03:56:36,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:56:36,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:36,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:56:36,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:56:36,289 INFO L87 Difference]: Start difference. First operand 15928 states and 50648 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:37,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:37,003 INFO L93 Difference]: Finished difference Result 17178 states and 53993 transitions. [2021-06-05 03:56:37,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 03:56:37,003 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:37,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:37,024 INFO L225 Difference]: With dead ends: 17178 [2021-06-05 03:56:37,025 INFO L226 Difference]: Without dead ends: 17178 [2021-06-05 03:56:37,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 587.3ms TimeCoverageRelationStatistics Valid=1411, Invalid=3145, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 03:56:37,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17178 states. [2021-06-05 03:56:37,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17178 to 15887. [2021-06-05 03:56:37,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15887 states, 15886 states have (on average 3.1804733727810652) internal successors, (50525), 15886 states have internal predecessors, (50525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:37,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15887 states to 15887 states and 50525 transitions. [2021-06-05 03:56:37,261 INFO L78 Accepts]: Start accepts. Automaton has 15887 states and 50525 transitions. Word has length 24 [2021-06-05 03:56:37,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:37,262 INFO L482 AbstractCegarLoop]: Abstraction has 15887 states and 50525 transitions. [2021-06-05 03:56:37,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:37,262 INFO L276 IsEmpty]: Start isEmpty. Operand 15887 states and 50525 transitions. [2021-06-05 03:56:37,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:37,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:37,281 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:37,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:37,481 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:37,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:37,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1494965135, now seen corresponding path program 390 times [2021-06-05 03:56:37,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:37,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664517155] [2021-06-05 03:56:37,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:37,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:37,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:37,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664517155] [2021-06-05 03:56:37,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664517155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:37,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124475804] [2021-06-05 03:56:37,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:37,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:56:37,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:37,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:37,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:37,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124475804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:37,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:37,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-06-05 03:56:37,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762176526] [2021-06-05 03:56:37,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:56:37,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:37,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:56:37,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:56:37,663 INFO L87 Difference]: Start difference. First operand 15887 states and 50525 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:38,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:38,249 INFO L93 Difference]: Finished difference Result 17298 states and 54207 transitions. [2021-06-05 03:56:38,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 03:56:38,249 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:38,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:38,271 INFO L225 Difference]: With dead ends: 17298 [2021-06-05 03:56:38,272 INFO L226 Difference]: Without dead ends: 17284 [2021-06-05 03:56:38,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 467.4ms TimeCoverageRelationStatistics Valid=1112, Invalid=2548, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 03:56:38,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17284 states. [2021-06-05 03:56:38,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17284 to 15888. [2021-06-05 03:56:38,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15888 states, 15887 states have (on average 3.180147290237301) internal successors, (50523), 15887 states have internal predecessors, (50523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:38,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15888 states to 15888 states and 50523 transitions. [2021-06-05 03:56:38,515 INFO L78 Accepts]: Start accepts. Automaton has 15888 states and 50523 transitions. Word has length 24 [2021-06-05 03:56:38,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:38,515 INFO L482 AbstractCegarLoop]: Abstraction has 15888 states and 50523 transitions. [2021-06-05 03:56:38,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:38,515 INFO L276 IsEmpty]: Start isEmpty. Operand 15888 states and 50523 transitions. [2021-06-05 03:56:38,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:38,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:38,534 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:38,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-06-05 03:56:38,735 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:38,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:38,735 INFO L82 PathProgramCache]: Analyzing trace with hash 276056071, now seen corresponding path program 391 times [2021-06-05 03:56:38,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:38,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070855050] [2021-06-05 03:56:38,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:38,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:38,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:38,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070855050] [2021-06-05 03:56:38,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070855050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:38,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048200397] [2021-06-05 03:56:38,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:38,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:38,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:38,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048200397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:38,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:38,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 03:56:38,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406180767] [2021-06-05 03:56:38,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:38,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:38,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:38,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:38,928 INFO L87 Difference]: Start difference. First operand 15888 states and 50523 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:39,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:39,523 INFO L93 Difference]: Finished difference Result 17783 states and 55482 transitions. [2021-06-05 03:56:39,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 03:56:39,523 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:39,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:39,547 INFO L225 Difference]: With dead ends: 17783 [2021-06-05 03:56:39,547 INFO L226 Difference]: Without dead ends: 17773 [2021-06-05 03:56:39,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 490.0ms TimeCoverageRelationStatistics Valid=1178, Invalid=2604, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 03:56:39,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17773 states. [2021-06-05 03:56:39,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17773 to 16003. [2021-06-05 03:56:39,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16003 states, 16002 states have (on average 3.1781652293463316) internal successors, (50857), 16002 states have internal predecessors, (50857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:39,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16003 states to 16003 states and 50857 transitions. [2021-06-05 03:56:39,822 INFO L78 Accepts]: Start accepts. Automaton has 16003 states and 50857 transitions. Word has length 24 [2021-06-05 03:56:39,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:39,822 INFO L482 AbstractCegarLoop]: Abstraction has 16003 states and 50857 transitions. [2021-06-05 03:56:39,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:39,822 INFO L276 IsEmpty]: Start isEmpty. Operand 16003 states and 50857 transitions. [2021-06-05 03:56:39,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:39,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:39,841 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:40,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable684,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:40,041 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:40,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:40,041 INFO L82 PathProgramCache]: Analyzing trace with hash -594547569, now seen corresponding path program 392 times [2021-06-05 03:56:40,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:40,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630416832] [2021-06-05 03:56:40,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:40,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:40,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630416832] [2021-06-05 03:56:40,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630416832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:40,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124037125] [2021-06-05 03:56:40,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:40,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:56:40,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:40,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:40,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:40,209 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:40,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124037125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:40,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:40,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 03:56:40,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737635989] [2021-06-05 03:56:40,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:40,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:40,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:40,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:40,210 INFO L87 Difference]: Start difference. First operand 16003 states and 50857 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:40,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:40,843 INFO L93 Difference]: Finished difference Result 17914 states and 55910 transitions. [2021-06-05 03:56:40,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 03:56:40,843 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:40,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:40,866 INFO L225 Difference]: With dead ends: 17914 [2021-06-05 03:56:40,866 INFO L226 Difference]: Without dead ends: 17904 [2021-06-05 03:56:40,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 488.2ms TimeCoverageRelationStatistics Valid=1233, Invalid=2549, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 03:56:40,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17904 states. [2021-06-05 03:56:41,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17904 to 16144. [2021-06-05 03:56:41,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16144 states, 16143 states have (on average 3.1767329492659355) internal successors, (51282), 16143 states have internal predecessors, (51282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:41,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16144 states to 16144 states and 51282 transitions. [2021-06-05 03:56:41,104 INFO L78 Accepts]: Start accepts. Automaton has 16144 states and 51282 transitions. Word has length 24 [2021-06-05 03:56:41,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:41,104 INFO L482 AbstractCegarLoop]: Abstraction has 16144 states and 51282 transitions. [2021-06-05 03:56:41,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:41,104 INFO L276 IsEmpty]: Start isEmpty. Operand 16144 states and 51282 transitions. [2021-06-05 03:56:41,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:41,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:41,123 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:41,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable685 [2021-06-05 03:56:41,323 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:41,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:41,323 INFO L82 PathProgramCache]: Analyzing trace with hash -206989561, now seen corresponding path program 393 times [2021-06-05 03:56:41,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:41,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577834095] [2021-06-05 03:56:41,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:41,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:41,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:41,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577834095] [2021-06-05 03:56:41,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577834095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:41,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831786051] [2021-06-05 03:56:41,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:41,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 03:56:41,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:41,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:41,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:41,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831786051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:41,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:41,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 03:56:41,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617641300] [2021-06-05 03:56:41,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:41,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:41,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:41,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:41,497 INFO L87 Difference]: Start difference. First operand 16144 states and 51282 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:42,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:42,272 INFO L93 Difference]: Finished difference Result 18800 states and 58404 transitions. [2021-06-05 03:56:42,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 03:56:42,272 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:42,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:42,297 INFO L225 Difference]: With dead ends: 18800 [2021-06-05 03:56:42,297 INFO L226 Difference]: Without dead ends: 18796 [2021-06-05 03:56:42,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 600.3ms TimeCoverageRelationStatistics Valid=1723, Invalid=3389, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 03:56:42,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18796 states. [2021-06-05 03:56:42,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18796 to 16306. [2021-06-05 03:56:42,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16306 states, 16305 states have (on average 3.176448942042318) internal successors, (51792), 16305 states have internal predecessors, (51792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:42,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16306 states to 16306 states and 51792 transitions. [2021-06-05 03:56:42,553 INFO L78 Accepts]: Start accepts. Automaton has 16306 states and 51792 transitions. Word has length 24 [2021-06-05 03:56:42,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:42,553 INFO L482 AbstractCegarLoop]: Abstraction has 16306 states and 51792 transitions. [2021-06-05 03:56:42,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:42,553 INFO L276 IsEmpty]: Start isEmpty. Operand 16306 states and 51792 transitions. [2021-06-05 03:56:42,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:42,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:42,649 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:42,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable686 [2021-06-05 03:56:42,850 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:42,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:42,850 INFO L82 PathProgramCache]: Analyzing trace with hash 636796303, now seen corresponding path program 394 times [2021-06-05 03:56:42,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:42,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89475892] [2021-06-05 03:56:42,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:42,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:42,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89475892] [2021-06-05 03:56:42,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89475892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:42,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722520252] [2021-06-05 03:56:42,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:42,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:56:42,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:42,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:42,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:43,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722520252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:43,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:43,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 03:56:43,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346791054] [2021-06-05 03:56:43,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:43,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:43,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:43,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:43,040 INFO L87 Difference]: Start difference. First operand 16306 states and 51792 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:43,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:43,827 INFO L93 Difference]: Finished difference Result 19224 states and 59687 transitions. [2021-06-05 03:56:43,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 03:56:43,827 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:43,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:43,852 INFO L225 Difference]: With dead ends: 19224 [2021-06-05 03:56:43,852 INFO L226 Difference]: Without dead ends: 19224 [2021-06-05 03:56:43,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 604.7ms TimeCoverageRelationStatistics Valid=1915, Invalid=3487, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 03:56:43,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19224 states. [2021-06-05 03:56:44,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19224 to 16395. [2021-06-05 03:56:44,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16395 states, 16394 states have (on average 3.1835427595461754) internal successors, (52191), 16394 states have internal predecessors, (52191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:44,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16395 states to 16395 states and 52191 transitions. [2021-06-05 03:56:44,102 INFO L78 Accepts]: Start accepts. Automaton has 16395 states and 52191 transitions. Word has length 24 [2021-06-05 03:56:44,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:44,102 INFO L482 AbstractCegarLoop]: Abstraction has 16395 states and 52191 transitions. [2021-06-05 03:56:44,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:44,102 INFO L276 IsEmpty]: Start isEmpty. Operand 16395 states and 52191 transitions. [2021-06-05 03:56:44,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:44,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:44,121 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:44,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable687,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:44,321 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:44,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:44,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1208251109, now seen corresponding path program 395 times [2021-06-05 03:56:44,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:44,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821884202] [2021-06-05 03:56:44,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:44,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:56:44,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:44,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821884202] [2021-06-05 03:56:44,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821884202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:44,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446326130] [2021-06-05 03:56:44,368 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:44,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 03:56:44,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:44,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:44,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:44,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446326130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:44,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:44,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 03:56:44,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037225869] [2021-06-05 03:56:44,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:44,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:44,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:44,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:44,493 INFO L87 Difference]: Start difference. First operand 16395 states and 52191 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:45,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:45,441 INFO L93 Difference]: Finished difference Result 18347 states and 57068 transitions. [2021-06-05 03:56:45,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 03:56:45,442 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:45,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:45,466 INFO L225 Difference]: With dead ends: 18347 [2021-06-05 03:56:45,466 INFO L226 Difference]: Without dead ends: 18335 [2021-06-05 03:56:45,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2217 ImplicationChecksByTransitivity, 766.5ms TimeCoverageRelationStatistics Valid=2592, Invalid=5598, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 03:56:45,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18335 states. [2021-06-05 03:56:45,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18335 to 16091. [2021-06-05 03:56:45,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16091 states, 16090 states have (on average 3.1781852082038533) internal successors, (51137), 16090 states have internal predecessors, (51137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:45,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16091 states to 16091 states and 51137 transitions. [2021-06-05 03:56:45,800 INFO L78 Accepts]: Start accepts. Automaton has 16091 states and 51137 transitions. Word has length 24 [2021-06-05 03:56:45,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:45,800 INFO L482 AbstractCegarLoop]: Abstraction has 16091 states and 51137 transitions. [2021-06-05 03:56:45,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:45,800 INFO L276 IsEmpty]: Start isEmpty. Operand 16091 states and 51137 transitions. [2021-06-05 03:56:45,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:45,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:45,819 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:46,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable688 [2021-06-05 03:56:46,027 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:46,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:46,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1743480911, now seen corresponding path program 396 times [2021-06-05 03:56:46,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:46,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498623472] [2021-06-05 03:56:46,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:46,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:56:46,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:46,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498623472] [2021-06-05 03:56:46,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498623472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:46,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230568385] [2021-06-05 03:56:46,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:46,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 03:56:46,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:46,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:46,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:46,209 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:46,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230568385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:46,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:46,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-06-05 03:56:46,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16530647] [2021-06-05 03:56:46,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:56:46,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:46,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:56:46,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:56:46,209 INFO L87 Difference]: Start difference. First operand 16091 states and 51137 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:47,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:47,127 INFO L93 Difference]: Finished difference Result 18125 states and 56330 transitions. [2021-06-05 03:56:47,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 03:56:47,127 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:47,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:47,154 INFO L225 Difference]: With dead ends: 18125 [2021-06-05 03:56:47,154 INFO L226 Difference]: Without dead ends: 18101 [2021-06-05 03:56:47,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 776.0ms TimeCoverageRelationStatistics Valid=2475, Invalid=5535, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 03:56:47,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18101 states. [2021-06-05 03:56:47,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18101 to 15884. [2021-06-05 03:56:47,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15884 states, 15883 states have (on average 3.1798148964301456) internal successors, (50505), 15883 states have internal predecessors, (50505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:47,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15884 states to 15884 states and 50505 transitions. [2021-06-05 03:56:47,406 INFO L78 Accepts]: Start accepts. Automaton has 15884 states and 50505 transitions. Word has length 24 [2021-06-05 03:56:47,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:47,406 INFO L482 AbstractCegarLoop]: Abstraction has 15884 states and 50505 transitions. [2021-06-05 03:56:47,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:47,406 INFO L276 IsEmpty]: Start isEmpty. Operand 15884 states and 50505 transitions. [2021-06-05 03:56:47,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:47,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:47,425 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:47,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-06-05 03:56:47,626 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:47,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:47,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1155735589, now seen corresponding path program 397 times [2021-06-05 03:56:47,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:47,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548755086] [2021-06-05 03:56:47,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:47,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:47,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:47,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548755086] [2021-06-05 03:56:47,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548755086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:47,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666177264] [2021-06-05 03:56:47,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:47,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:47,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:47,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666177264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:47,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:47,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 03:56:47,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370908508] [2021-06-05 03:56:47,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:56:47,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:47,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:56:47,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:56:47,818 INFO L87 Difference]: Start difference. First operand 15884 states and 50505 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:48,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:48,641 INFO L93 Difference]: Finished difference Result 17742 states and 55315 transitions. [2021-06-05 03:56:48,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 03:56:48,641 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:48,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:48,665 INFO L225 Difference]: With dead ends: 17742 [2021-06-05 03:56:48,665 INFO L226 Difference]: Without dead ends: 17724 [2021-06-05 03:56:48,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2321 ImplicationChecksByTransitivity, 688.3ms TimeCoverageRelationStatistics Valid=2455, Invalid=5555, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 03:56:48,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17724 states. [2021-06-05 03:56:48,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17724 to 15928. [2021-06-05 03:56:48,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15928 states, 15927 states have (on average 3.180322722421046) internal successors, (50653), 15927 states have internal predecessors, (50653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:49,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15928 states to 15928 states and 50653 transitions. [2021-06-05 03:56:49,007 INFO L78 Accepts]: Start accepts. Automaton has 15928 states and 50653 transitions. Word has length 24 [2021-06-05 03:56:49,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:49,007 INFO L482 AbstractCegarLoop]: Abstraction has 15928 states and 50653 transitions. [2021-06-05 03:56:49,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:49,007 INFO L276 IsEmpty]: Start isEmpty. Operand 15928 states and 50653 transitions. [2021-06-05 03:56:49,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:49,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:49,025 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:49,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:49,226 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:49,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:49,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1843830867, now seen corresponding path program 398 times [2021-06-05 03:56:49,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:49,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977834851] [2021-06-05 03:56:49,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:49,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:49,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977834851] [2021-06-05 03:56:49,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977834851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:49,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752311206] [2021-06-05 03:56:49,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:49,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:56:49,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:49,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:49,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:49,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752311206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:49,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:49,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 03:56:49,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614187094] [2021-06-05 03:56:49,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 03:56:49,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:49,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 03:56:49,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:56:49,449 INFO L87 Difference]: Start difference. First operand 15928 states and 50653 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:50,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:50,232 INFO L93 Difference]: Finished difference Result 16795 states and 52835 transitions. [2021-06-05 03:56:50,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 03:56:50,232 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:50,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:50,255 INFO L225 Difference]: With dead ends: 16795 [2021-06-05 03:56:50,255 INFO L226 Difference]: Without dead ends: 16795 [2021-06-05 03:56:50,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 649.9ms TimeCoverageRelationStatistics Valid=1571, Invalid=3685, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 03:56:50,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16795 states. [2021-06-05 03:56:50,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16795 to 15853. [2021-06-05 03:56:50,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15853 states, 15852 states have (on average 3.181049709815796) internal successors, (50426), 15852 states have internal predecessors, (50426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:50,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15853 states to 15853 states and 50426 transitions. [2021-06-05 03:56:50,512 INFO L78 Accepts]: Start accepts. Automaton has 15853 states and 50426 transitions. Word has length 24 [2021-06-05 03:56:50,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:50,512 INFO L482 AbstractCegarLoop]: Abstraction has 15853 states and 50426 transitions. [2021-06-05 03:56:50,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:50,512 INFO L276 IsEmpty]: Start isEmpty. Operand 15853 states and 50426 transitions. [2021-06-05 03:56:50,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:50,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:50,532 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:50,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:50,737 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:50,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:50,737 INFO L82 PathProgramCache]: Analyzing trace with hash -448052653, now seen corresponding path program 399 times [2021-06-05 03:56:50,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:50,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000280336] [2021-06-05 03:56:50,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:50,788 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:50,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:50,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000280336] [2021-06-05 03:56:50,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000280336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:50,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129778346] [2021-06-05 03:56:50,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:50,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:56:50,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:50,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:50,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:50,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129778346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:50,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:50,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-06-05 03:56:50,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439008496] [2021-06-05 03:56:50,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:56:50,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:50,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:56:50,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:56:50,927 INFO L87 Difference]: Start difference. First operand 15853 states and 50426 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:51,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:51,614 INFO L93 Difference]: Finished difference Result 16783 states and 52633 transitions. [2021-06-05 03:56:51,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 03:56:51,614 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:51,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:51,636 INFO L225 Difference]: With dead ends: 16783 [2021-06-05 03:56:51,636 INFO L226 Difference]: Without dead ends: 16769 [2021-06-05 03:56:51,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1182 ImplicationChecksByTransitivity, 537.3ms TimeCoverageRelationStatistics Valid=1254, Invalid=3036, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 03:56:51,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16769 states. [2021-06-05 03:56:51,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16769 to 15761. [2021-06-05 03:56:51,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15761 states, 15760 states have (on average 3.1805837563451775) internal successors, (50126), 15760 states have internal predecessors, (50126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:51,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15761 states to 15761 states and 50126 transitions. [2021-06-05 03:56:51,873 INFO L78 Accepts]: Start accepts. Automaton has 15761 states and 50126 transitions. Word has length 24 [2021-06-05 03:56:51,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:51,873 INFO L482 AbstractCegarLoop]: Abstraction has 15761 states and 50126 transitions. [2021-06-05 03:56:51,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:51,873 INFO L276 IsEmpty]: Start isEmpty. Operand 15761 states and 50126 transitions. [2021-06-05 03:56:51,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:51,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:51,891 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:52,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:52,092 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:52,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:52,092 INFO L82 PathProgramCache]: Analyzing trace with hash 2110414931, now seen corresponding path program 400 times [2021-06-05 03:56:52,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:52,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477212748] [2021-06-05 03:56:52,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:52,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:52,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477212748] [2021-06-05 03:56:52,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477212748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:52,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780788530] [2021-06-05 03:56:52,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:52,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:56:52,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:52,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:52,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:52,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780788530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:52,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:52,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-06-05 03:56:52,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502150476] [2021-06-05 03:56:52,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:56:52,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:52,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:56:52,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:56:52,285 INFO L87 Difference]: Start difference. First operand 15761 states and 50126 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:53,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:53,024 INFO L93 Difference]: Finished difference Result 17488 states and 54534 transitions. [2021-06-05 03:56:53,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 03:56:53,024 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:53,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:53,050 INFO L225 Difference]: With dead ends: 17488 [2021-06-05 03:56:53,050 INFO L226 Difference]: Without dead ends: 17478 [2021-06-05 03:56:53,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 554.0ms TimeCoverageRelationStatistics Valid=1312, Invalid=2978, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 03:56:53,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17478 states. [2021-06-05 03:56:53,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17478 to 15724. [2021-06-05 03:56:53,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15724 states, 15723 states have (on average 3.179800292565032) internal successors, (49996), 15723 states have internal predecessors, (49996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15724 states to 15724 states and 49996 transitions. [2021-06-05 03:56:53,320 INFO L78 Accepts]: Start accepts. Automaton has 15724 states and 49996 transitions. Word has length 24 [2021-06-05 03:56:53,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:53,320 INFO L482 AbstractCegarLoop]: Abstraction has 15724 states and 49996 transitions. [2021-06-05 03:56:53,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:53,321 INFO L276 IsEmpty]: Start isEmpty. Operand 15724 states and 49996 transitions. [2021-06-05 03:56:53,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:53,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:53,339 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:53,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable693,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:53,539 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:53,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:53,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1777304147, now seen corresponding path program 401 times [2021-06-05 03:56:53,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:53,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357181898] [2021-06-05 03:56:53,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:53,582 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:53,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:53,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357181898] [2021-06-05 03:56:53,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357181898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:53,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671042174] [2021-06-05 03:56:53,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:53,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:56:53,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:53,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:53,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:53,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671042174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:53,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:53,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-06-05 03:56:53,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153201301] [2021-06-05 03:56:53,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:53,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:53,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:53,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:53,713 INFO L87 Difference]: Start difference. First operand 15724 states and 49996 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:54,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:54,422 INFO L93 Difference]: Finished difference Result 19027 states and 59058 transitions. [2021-06-05 03:56:54,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 03:56:54,422 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:54,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:54,447 INFO L225 Difference]: With dead ends: 19027 [2021-06-05 03:56:54,447 INFO L226 Difference]: Without dead ends: 19021 [2021-06-05 03:56:54,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 525.9ms TimeCoverageRelationStatistics Valid=1353, Invalid=2807, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 03:56:54,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19021 states. [2021-06-05 03:56:54,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19021 to 16139. [2021-06-05 03:56:54,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16139 states, 16138 states have (on average 3.178584706902962) internal successors, (51296), 16138 states have internal predecessors, (51296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:54,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16139 states to 16139 states and 51296 transitions. [2021-06-05 03:56:54,691 INFO L78 Accepts]: Start accepts. Automaton has 16139 states and 51296 transitions. Word has length 24 [2021-06-05 03:56:54,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:54,691 INFO L482 AbstractCegarLoop]: Abstraction has 16139 states and 51296 transitions. [2021-06-05 03:56:54,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:54,691 INFO L276 IsEmpty]: Start isEmpty. Operand 16139 states and 51296 transitions. [2021-06-05 03:56:54,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:54,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:54,712 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:54,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2021-06-05 03:56:54,921 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:54,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:54,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1281482669, now seen corresponding path program 402 times [2021-06-05 03:56:54,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:54,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854178380] [2021-06-05 03:56:54,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:54,961 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:54,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:54,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854178380] [2021-06-05 03:56:54,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854178380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:54,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108073204] [2021-06-05 03:56:54,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:54,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:56:54,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:54,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:54,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:55,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108073204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:55,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:55,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-06-05 03:56:55,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085639779] [2021-06-05 03:56:55,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:55,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:55,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:55,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:55,090 INFO L87 Difference]: Start difference. First operand 16139 states and 51296 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:55,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:55,816 INFO L93 Difference]: Finished difference Result 18678 states and 58104 transitions. [2021-06-05 03:56:55,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 03:56:55,817 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:55,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:55,842 INFO L225 Difference]: With dead ends: 18678 [2021-06-05 03:56:55,842 INFO L226 Difference]: Without dead ends: 18674 [2021-06-05 03:56:55,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 557.2ms TimeCoverageRelationStatistics Valid=1546, Invalid=3010, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 03:56:55,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18674 states. [2021-06-05 03:56:56,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18674 to 16227. [2021-06-05 03:56:56,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16227 states, 16226 states have (on average 3.1787255022802907) internal successors, (51578), 16226 states have internal predecessors, (51578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:56,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16227 states to 16227 states and 51578 transitions. [2021-06-05 03:56:56,117 INFO L78 Accepts]: Start accepts. Automaton has 16227 states and 51578 transitions. Word has length 24 [2021-06-05 03:56:56,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:56,117 INFO L482 AbstractCegarLoop]: Abstraction has 16227 states and 51578 transitions. [2021-06-05 03:56:56,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:56,117 INFO L276 IsEmpty]: Start isEmpty. Operand 16227 states and 51578 transitions. [2021-06-05 03:56:56,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:56,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:56,137 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:56,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable695 [2021-06-05 03:56:56,337 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:56,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:56,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1252246099, now seen corresponding path program 403 times [2021-06-05 03:56:56,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:56,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881299239] [2021-06-05 03:56:56,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:56,384 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:56,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:56,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881299239] [2021-06-05 03:56:56,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881299239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:56,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989793809] [2021-06-05 03:56:56,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:56,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:56,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:56,513 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:56,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989793809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:56,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:56,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-06-05 03:56:56,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281251416] [2021-06-05 03:56:56,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:56,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:56,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:56,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:56,514 INFO L87 Difference]: Start difference. First operand 16227 states and 51578 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:57,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:57,288 INFO L93 Difference]: Finished difference Result 19416 states and 60144 transitions. [2021-06-05 03:56:57,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 03:56:57,288 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:57,314 INFO L225 Difference]: With dead ends: 19416 [2021-06-05 03:56:57,314 INFO L226 Difference]: Without dead ends: 19416 [2021-06-05 03:56:57,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 626.4ms TimeCoverageRelationStatistics Valid=1821, Invalid=3291, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 03:56:57,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19416 states. [2021-06-05 03:56:57,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19416 to 16138. [2021-06-05 03:56:57,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16138 states, 16137 states have (on average 3.1851645287228108) internal successors, (51399), 16137 states have internal predecessors, (51399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:57,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16138 states to 16138 states and 51399 transitions. [2021-06-05 03:56:57,560 INFO L78 Accepts]: Start accepts. Automaton has 16138 states and 51399 transitions. Word has length 24 [2021-06-05 03:56:57,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:57,560 INFO L482 AbstractCegarLoop]: Abstraction has 16138 states and 51399 transitions. [2021-06-05 03:56:57,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:57,561 INFO L276 IsEmpty]: Start isEmpty. Operand 16138 states and 51399 transitions. [2021-06-05 03:56:57,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:57,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:57,579 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:57,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable696 [2021-06-05 03:56:57,779 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:57,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:57,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1823700905, now seen corresponding path program 404 times [2021-06-05 03:56:57,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:57,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475790041] [2021-06-05 03:56:57,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:56:57,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:57,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475790041] [2021-06-05 03:56:57,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475790041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:57,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727721594] [2021-06-05 03:56:57,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:57,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:56:57,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:57,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:57,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:57,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727721594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:57,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:57,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-06-05 03:56:57,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887189608] [2021-06-05 03:56:57,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:57,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:57,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:57,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:57,966 INFO L87 Difference]: Start difference. First operand 16138 states and 51399 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:58,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:58,964 INFO L93 Difference]: Finished difference Result 18584 states and 57665 transitions. [2021-06-05 03:56:58,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 03:56:58,964 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:56:58,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:58,988 INFO L225 Difference]: With dead ends: 18584 [2021-06-05 03:56:58,988 INFO L226 Difference]: Without dead ends: 18575 [2021-06-05 03:56:58,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2672 ImplicationChecksByTransitivity, 839.6ms TimeCoverageRelationStatistics Valid=2787, Invalid=6333, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 03:56:58,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18575 states. [2021-06-05 03:56:59,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18575 to 16009. [2021-06-05 03:56:59,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16009 states, 16008 states have (on average 3.182408795602199) internal successors, (50944), 16008 states have internal predecessors, (50944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:59,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16009 states to 16009 states and 50944 transitions. [2021-06-05 03:56:59,232 INFO L78 Accepts]: Start accepts. Automaton has 16009 states and 50944 transitions. Word has length 24 [2021-06-05 03:56:59,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:59,232 INFO L482 AbstractCegarLoop]: Abstraction has 16009 states and 50944 transitions. [2021-06-05 03:56:59,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:59,233 INFO L276 IsEmpty]: Start isEmpty. Operand 16009 states and 50944 transitions. [2021-06-05 03:56:59,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:56:59,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:59,251 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:59,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 408 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-06-05 03:56:59,452 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:59,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:59,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1936036589, now seen corresponding path program 405 times [2021-06-05 03:56:59,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:59,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694359871] [2021-06-05 03:56:59,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:59,498 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:56:59,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:59,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694359871] [2021-06-05 03:56:59,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694359871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:59,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801257847] [2021-06-05 03:56:59,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:56:59,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 03:56:59,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:59,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:56:59,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:59,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801257847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:59,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:59,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-06-05 03:56:59,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560367869] [2021-06-05 03:56:59,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:56:59,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:59,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:56:59,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:56:59,646 INFO L87 Difference]: Start difference. First operand 16009 states and 50944 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:00,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:00,582 INFO L93 Difference]: Finished difference Result 18529 states and 57461 transitions. [2021-06-05 03:57:00,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 03:57:00,583 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:57:00,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:00,606 INFO L225 Difference]: With dead ends: 18529 [2021-06-05 03:57:00,607 INFO L226 Difference]: Without dead ends: 18514 [2021-06-05 03:57:00,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2513 ImplicationChecksByTransitivity, 784.3ms TimeCoverageRelationStatistics Valid=2529, Invalid=6027, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 03:57:00,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18514 states. [2021-06-05 03:57:00,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18514 to 15897. [2021-06-05 03:57:00,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15897 states, 15896 states have (on average 3.1817438349270257) internal successors, (50577), 15896 states have internal predecessors, (50577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:00,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15897 states to 15897 states and 50577 transitions. [2021-06-05 03:57:00,883 INFO L78 Accepts]: Start accepts. Automaton has 15897 states and 50577 transitions. Word has length 24 [2021-06-05 03:57:00,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:00,883 INFO L482 AbstractCegarLoop]: Abstraction has 15897 states and 50577 transitions. [2021-06-05 03:57:00,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:00,883 INFO L276 IsEmpty]: Start isEmpty. Operand 15897 states and 50577 transitions. [2021-06-05 03:57:00,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:57:00,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:00,902 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:01,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable698 [2021-06-05 03:57:01,102 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:01,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:01,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1771185385, now seen corresponding path program 406 times [2021-06-05 03:57:01,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:01,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074366203] [2021-06-05 03:57:01,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:01,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:57:01,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:01,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074366203] [2021-06-05 03:57:01,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074366203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:01,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277582012] [2021-06-05 03:57:01,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:01,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:57:01,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:01,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:57:01,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:01,290 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:01,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277582012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:01,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:01,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-06-05 03:57:01,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744147389] [2021-06-05 03:57:01,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:57:01,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:01,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:57:01,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:57:01,290 INFO L87 Difference]: Start difference. First operand 15897 states and 50577 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:02,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:02,158 INFO L93 Difference]: Finished difference Result 18517 states and 57409 transitions. [2021-06-05 03:57:02,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 03:57:02,158 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:57:02,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:02,182 INFO L225 Difference]: With dead ends: 18517 [2021-06-05 03:57:02,182 INFO L226 Difference]: Without dead ends: 18490 [2021-06-05 03:57:02,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2460 ImplicationChecksByTransitivity, 757.3ms TimeCoverageRelationStatistics Valid=2373, Invalid=5817, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 03:57:02,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18490 states. [2021-06-05 03:57:02,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18490 to 15779. [2021-06-05 03:57:02,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15779 states, 15778 states have (on average 3.1827227785524146) internal successors, (50217), 15778 states have internal predecessors, (50217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:02,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15779 states to 15779 states and 50217 transitions. [2021-06-05 03:57:02,414 INFO L78 Accepts]: Start accepts. Automaton has 15779 states and 50217 transitions. Word has length 24 [2021-06-05 03:57:02,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:02,414 INFO L482 AbstractCegarLoop]: Abstraction has 15779 states and 50217 transitions. [2021-06-05 03:57:02,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:02,414 INFO L276 IsEmpty]: Start isEmpty. Operand 15779 states and 50217 transitions. [2021-06-05 03:57:02,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:57:02,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:02,434 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:02,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable699 [2021-06-05 03:57:02,634 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:02,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:02,634 INFO L82 PathProgramCache]: Analyzing trace with hash 730949587, now seen corresponding path program 407 times [2021-06-05 03:57:02,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:02,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022268101] [2021-06-05 03:57:02,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:02,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:02,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:02,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022268101] [2021-06-05 03:57:02,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022268101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:02,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162848500] [2021-06-05 03:57:02,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:02,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 03:57:02,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:02,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:57:02,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:02,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162848500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:02,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:02,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 03:57:02,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290591707] [2021-06-05 03:57:02,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 03:57:02,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:02,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 03:57:02,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:57:02,838 INFO L87 Difference]: Start difference. First operand 15779 states and 50217 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:03,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:03,646 INFO L93 Difference]: Finished difference Result 18160 states and 56473 transitions. [2021-06-05 03:57:03,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 03:57:03,646 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:57:03,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:03,673 INFO L225 Difference]: With dead ends: 18160 [2021-06-05 03:57:03,673 INFO L226 Difference]: Without dead ends: 18136 [2021-06-05 03:57:03,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2410 ImplicationChecksByTransitivity, 690.1ms TimeCoverageRelationStatistics Valid=2313, Invalid=5697, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 03:57:03,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18136 states. [2021-06-05 03:57:03,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18136 to 15810. [2021-06-05 03:57:03,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15810 states, 15809 states have (on average 3.183123537225631) internal successors, (50322), 15809 states have internal predecessors, (50322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:03,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15810 states to 15810 states and 50322 transitions. [2021-06-05 03:57:03,934 INFO L78 Accepts]: Start accepts. Automaton has 15810 states and 50322 transitions. Word has length 24 [2021-06-05 03:57:03,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:03,934 INFO L482 AbstractCegarLoop]: Abstraction has 15810 states and 50322 transitions. [2021-06-05 03:57:03,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:03,934 INFO L276 IsEmpty]: Start isEmpty. Operand 15810 states and 50322 transitions. [2021-06-05 03:57:03,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:57:03,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:03,953 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:04,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable700,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:04,154 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:04,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:04,154 INFO L82 PathProgramCache]: Analyzing trace with hash 928227975, now seen corresponding path program 408 times [2021-06-05 03:57:04,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:04,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120228622] [2021-06-05 03:57:04,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:04,214 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:04,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:04,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120228622] [2021-06-05 03:57:04,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120228622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:04,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288871378] [2021-06-05 03:57:04,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:04,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:57:04,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:04,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:57:04,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:04,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288871378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:04,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:04,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-06-05 03:57:04,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206278596] [2021-06-05 03:57:04,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 03:57:04,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:04,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 03:57:04,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:57:04,373 INFO L87 Difference]: Start difference. First operand 15810 states and 50322 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:05,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:05,173 INFO L93 Difference]: Finished difference Result 16413 states and 51718 transitions. [2021-06-05 03:57:05,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 03:57:05,173 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:57:05,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:05,194 INFO L225 Difference]: With dead ends: 16413 [2021-06-05 03:57:05,194 INFO L226 Difference]: Without dead ends: 16413 [2021-06-05 03:57:05,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 708.0ms TimeCoverageRelationStatistics Valid=1699, Invalid=4153, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 03:57:05,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16413 states. [2021-06-05 03:57:05,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16413 to 15703. [2021-06-05 03:57:05,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15703 states, 15702 states have (on average 3.1823971468602728) internal successors, (49970), 15702 states have internal predecessors, (49970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:05,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15703 states to 15703 states and 49970 transitions. [2021-06-05 03:57:05,418 INFO L78 Accepts]: Start accepts. Automaton has 15703 states and 49970 transitions. Word has length 24 [2021-06-05 03:57:05,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:05,419 INFO L482 AbstractCegarLoop]: Abstraction has 15703 states and 49970 transitions. [2021-06-05 03:57:05,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:05,419 INFO L276 IsEmpty]: Start isEmpty. Operand 15703 states and 49970 transitions. [2021-06-05 03:57:05,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:57:05,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:05,438 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:05,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable701 [2021-06-05 03:57:05,638 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:05,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:05,639 INFO L82 PathProgramCache]: Analyzing trace with hash -552061937, now seen corresponding path program 409 times [2021-06-05 03:57:05,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:05,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420153996] [2021-06-05 03:57:05,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:05,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:05,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420153996] [2021-06-05 03:57:05,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420153996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:05,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53949396] [2021-06-05 03:57:05,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:05,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:57:05,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:05,841 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:05,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53949396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:05,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:05,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-06-05 03:57:05,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6124409] [2021-06-05 03:57:05,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 03:57:05,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:05,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 03:57:05,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:57:05,842 INFO L87 Difference]: Start difference. First operand 15703 states and 49970 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:06,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:06,586 INFO L93 Difference]: Finished difference Result 16653 states and 52172 transitions. [2021-06-05 03:57:06,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 03:57:06,587 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:57:06,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:06,608 INFO L225 Difference]: With dead ends: 16653 [2021-06-05 03:57:06,609 INFO L226 Difference]: Without dead ends: 16639 [2021-06-05 03:57:06,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 608.7ms TimeCoverageRelationStatistics Valid=1371, Invalid=3459, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 03:57:06,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16639 states. [2021-06-05 03:57:06,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16639 to 15440. [2021-06-05 03:57:06,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15440 states, 15439 states have (on average 3.1834315694021633) internal successors, (49149), 15439 states have internal predecessors, (49149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:06,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15440 states to 15440 states and 49149 transitions. [2021-06-05 03:57:06,846 INFO L78 Accepts]: Start accepts. Automaton has 15440 states and 49149 transitions. Word has length 24 [2021-06-05 03:57:06,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:06,846 INFO L482 AbstractCegarLoop]: Abstraction has 15440 states and 49149 transitions. [2021-06-05 03:57:06,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:06,846 INFO L276 IsEmpty]: Start isEmpty. Operand 15440 states and 49149 transitions. [2021-06-05 03:57:06,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:57:06,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:06,865 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:07,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable702,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:07,066 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:07,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:07,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1154002553, now seen corresponding path program 410 times [2021-06-05 03:57:07,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:07,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234026980] [2021-06-05 03:57:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:07,116 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:07,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:07,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234026980] [2021-06-05 03:57:07,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234026980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:07,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103706147] [2021-06-05 03:57:07,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:07,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:57:07,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:07,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:57:07,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:07,265 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:07,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103706147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:07,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:07,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-06-05 03:57:07,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173568493] [2021-06-05 03:57:07,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:57:07,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:07,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:57:07,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:57:07,266 INFO L87 Difference]: Start difference. First operand 15440 states and 49149 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:08,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:08,056 INFO L93 Difference]: Finished difference Result 17145 states and 53340 transitions. [2021-06-05 03:57:08,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 03:57:08,057 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:57:08,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:08,078 INFO L225 Difference]: With dead ends: 17145 [2021-06-05 03:57:08,078 INFO L226 Difference]: Without dead ends: 17135 [2021-06-05 03:57:08,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 597.2ms TimeCoverageRelationStatistics Valid=1349, Invalid=3207, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 03:57:08,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17135 states. [2021-06-05 03:57:08,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17135 to 15065. [2021-06-05 03:57:08,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15065 states, 15064 states have (on average 3.1838157195963888) internal successors, (47961), 15064 states have internal predecessors, (47961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:08,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15065 states to 15065 states and 47961 transitions. [2021-06-05 03:57:08,294 INFO L78 Accepts]: Start accepts. Automaton has 15065 states and 47961 transitions. Word has length 24 [2021-06-05 03:57:08,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:08,294 INFO L482 AbstractCegarLoop]: Abstraction has 15065 states and 47961 transitions. [2021-06-05 03:57:08,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:08,294 INFO L276 IsEmpty]: Start isEmpty. Operand 15065 states and 47961 transitions. [2021-06-05 03:57:08,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:57:08,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:08,312 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:08,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable703 [2021-06-05 03:57:08,513 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:08,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:08,513 INFO L82 PathProgramCache]: Analyzing trace with hash -2004703985, now seen corresponding path program 411 times [2021-06-05 03:57:08,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:08,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961609989] [2021-06-05 03:57:08,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:08,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:08,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961609989] [2021-06-05 03:57:08,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961609989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:08,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476388993] [2021-06-05 03:57:08,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:08,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 03:57:08,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:08,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:57:08,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:08,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476388993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:08,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:08,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 23 [2021-06-05 03:57:08,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602740034] [2021-06-05 03:57:08,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:57:08,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:08,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:57:08,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:57:08,765 INFO L87 Difference]: Start difference. First operand 15065 states and 47961 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:09,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:09,509 INFO L93 Difference]: Finished difference Result 18361 states and 56965 transitions. [2021-06-05 03:57:09,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 03:57:09,509 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:57:09,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:09,533 INFO L225 Difference]: With dead ends: 18361 [2021-06-05 03:57:09,533 INFO L226 Difference]: Without dead ends: 18355 [2021-06-05 03:57:09,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 556.0ms TimeCoverageRelationStatistics Valid=1388, Invalid=3034, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 03:57:09,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18355 states. [2021-06-05 03:57:09,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18355 to 15150. [2021-06-05 03:57:09,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15150 states, 15149 states have (on average 3.1832464189055383) internal successors, (48223), 15149 states have internal predecessors, (48223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:09,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15150 states to 15150 states and 48223 transitions. [2021-06-05 03:57:09,763 INFO L78 Accepts]: Start accepts. Automaton has 15150 states and 48223 transitions. Word has length 24 [2021-06-05 03:57:09,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:09,764 INFO L482 AbstractCegarLoop]: Abstraction has 15150 states and 48223 transitions. [2021-06-05 03:57:09,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:09,764 INFO L276 IsEmpty]: Start isEmpty. Operand 15150 states and 48223 transitions. [2021-06-05 03:57:09,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:57:09,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:09,782 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:09,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable704 [2021-06-05 03:57:09,982 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:09,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:09,982 INFO L82 PathProgramCache]: Analyzing trace with hash -231030649, now seen corresponding path program 412 times [2021-06-05 03:57:09,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:09,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606272337] [2021-06-05 03:57:09,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:09,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:10,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:10,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606272337] [2021-06-05 03:57:10,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606272337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:10,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547901852] [2021-06-05 03:57:10,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:10,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:57:10,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:10,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:57:10,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:10,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547901852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:10,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:10,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2021-06-05 03:57:10,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630635395] [2021-06-05 03:57:10,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:57:10,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:10,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:57:10,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:57:10,157 INFO L87 Difference]: Start difference. First operand 15150 states and 48223 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:10,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:10,867 INFO L93 Difference]: Finished difference Result 20262 states and 62769 transitions. [2021-06-05 03:57:10,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 03:57:10,867 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:57:10,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:10,893 INFO L225 Difference]: With dead ends: 20262 [2021-06-05 03:57:10,894 INFO L226 Difference]: Without dead ends: 20260 [2021-06-05 03:57:10,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 570.4ms TimeCoverageRelationStatistics Valid=1573, Invalid=3119, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 03:57:10,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20260 states. [2021-06-05 03:57:11,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20260 to 16488. [2021-06-05 03:57:11,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16488 states, 16487 states have (on average 3.178746891490265) internal successors, (52408), 16487 states have internal predecessors, (52408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:11,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16488 states to 16488 states and 52408 transitions. [2021-06-05 03:57:11,156 INFO L78 Accepts]: Start accepts. Automaton has 16488 states and 52408 transitions. Word has length 24 [2021-06-05 03:57:11,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:11,156 INFO L482 AbstractCegarLoop]: Abstraction has 16488 states and 52408 transitions. [2021-06-05 03:57:11,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:11,156 INFO L276 IsEmpty]: Start isEmpty. Operand 16488 states and 52408 transitions. [2021-06-05 03:57:11,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:57:11,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:11,175 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:11,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable705,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:11,375 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:11,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:11,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1143646705, now seen corresponding path program 413 times [2021-06-05 03:57:11,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:11,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061980614] [2021-06-05 03:57:11,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:11,413 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:11,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:11,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061980614] [2021-06-05 03:57:11,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061980614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:11,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914383767] [2021-06-05 03:57:11,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:11,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:57:11,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:11,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:57:11,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:11,546 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:11,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914383767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:11,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:11,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2021-06-05 03:57:11,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937533062] [2021-06-05 03:57:11,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:57:11,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:11,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:57:11,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:57:11,547 INFO L87 Difference]: Start difference. First operand 16488 states and 52408 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:12,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:12,301 INFO L93 Difference]: Finished difference Result 19932 states and 61591 transitions. [2021-06-05 03:57:12,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 03:57:12,302 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:57:12,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:12,327 INFO L225 Difference]: With dead ends: 19932 [2021-06-05 03:57:12,328 INFO L226 Difference]: Without dead ends: 19932 [2021-06-05 03:57:12,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 574.4ms TimeCoverageRelationStatistics Valid=1717, Invalid=3113, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 03:57:12,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19932 states. [2021-06-05 03:57:12,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19932 to 16990. [2021-06-05 03:57:12,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16990 states, 16989 states have (on average 3.183648242980752) internal successors, (54087), 16989 states have internal predecessors, (54087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:12,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16990 states to 16990 states and 54087 transitions. [2021-06-05 03:57:12,670 INFO L78 Accepts]: Start accepts. Automaton has 16990 states and 54087 transitions. Word has length 24 [2021-06-05 03:57:12,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:12,670 INFO L482 AbstractCegarLoop]: Abstraction has 16990 states and 54087 transitions. [2021-06-05 03:57:12,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:12,670 INFO L276 IsEmpty]: Start isEmpty. Operand 16990 states and 54087 transitions. [2021-06-05 03:57:12,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:57:12,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:12,693 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:12,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:12,894 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:12,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:12,894 INFO L82 PathProgramCache]: Analyzing trace with hash -572191899, now seen corresponding path program 414 times [2021-06-05 03:57:12,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:12,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694530401] [2021-06-05 03:57:12,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:57:12,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:12,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694530401] [2021-06-05 03:57:12,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694530401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:12,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348175778] [2021-06-05 03:57:12,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:12,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:57:12,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:12,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:57:12,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:13,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348175778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:13,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:13,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2021-06-05 03:57:13,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58952672] [2021-06-05 03:57:13,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:57:13,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:13,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:57:13,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:57:13,090 INFO L87 Difference]: Start difference. First operand 16990 states and 54087 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:14,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:14,297 INFO L93 Difference]: Finished difference Result 19753 states and 61171 transitions. [2021-06-05 03:57:14,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 03:57:14,297 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:57:14,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:14,325 INFO L225 Difference]: With dead ends: 19753 [2021-06-05 03:57:14,325 INFO L226 Difference]: Without dead ends: 19744 [2021-06-05 03:57:14,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3393 ImplicationChecksByTransitivity, 1003.8ms TimeCoverageRelationStatistics Valid=3090, Invalid=7416, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 03:57:14,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19744 states. [2021-06-05 03:57:14,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19744 to 16867. [2021-06-05 03:57:14,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16867 states, 16866 states have (on average 3.1820230048618523) internal successors, (53668), 16866 states have internal predecessors, (53668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:14,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16867 states to 16867 states and 53668 transitions. [2021-06-05 03:57:14,604 INFO L78 Accepts]: Start accepts. Automaton has 16867 states and 53668 transitions. Word has length 24 [2021-06-05 03:57:14,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:14,604 INFO L482 AbstractCegarLoop]: Abstraction has 16867 states and 53668 transitions. [2021-06-05 03:57:14,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:14,604 INFO L276 IsEmpty]: Start isEmpty. Operand 16867 states and 53668 transitions. [2021-06-05 03:57:14,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:57:14,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:14,625 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:14,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:14,825 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:14,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:14,825 INFO L82 PathProgramCache]: Analyzing trace with hash -36962097, now seen corresponding path program 415 times [2021-06-05 03:57:14,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:14,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170267163] [2021-06-05 03:57:14,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:14,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:57:14,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:14,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170267163] [2021-06-05 03:57:14,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170267163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:14,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153575912] [2021-06-05 03:57:14,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:14,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:57:14,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:15,019 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:15,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153575912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:15,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:15,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 23 [2021-06-05 03:57:15,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099254537] [2021-06-05 03:57:15,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:57:15,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:15,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:57:15,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:57:15,020 INFO L87 Difference]: Start difference. First operand 16867 states and 53668 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:16,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:16,014 INFO L93 Difference]: Finished difference Result 19710 states and 61049 transitions. [2021-06-05 03:57:16,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 03:57:16,014 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:57:16,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:16,039 INFO L225 Difference]: With dead ends: 19710 [2021-06-05 03:57:16,040 INFO L226 Difference]: Without dead ends: 19698 [2021-06-05 03:57:16,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3019 ImplicationChecksByTransitivity, 846.8ms TimeCoverageRelationStatistics Valid=2700, Invalid=6806, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 03:57:16,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19698 states. [2021-06-05 03:57:16,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19698 to 16758. [2021-06-05 03:57:16,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16758 states, 16757 states have (on average 3.181476397923256) internal successors, (53312), 16757 states have internal predecessors, (53312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:16,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16758 states to 16758 states and 53312 transitions. [2021-06-05 03:57:16,349 INFO L78 Accepts]: Start accepts. Automaton has 16758 states and 53312 transitions. Word has length 24 [2021-06-05 03:57:16,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:16,349 INFO L482 AbstractCegarLoop]: Abstraction has 16758 states and 53312 transitions. [2021-06-05 03:57:16,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:16,349 INFO L276 IsEmpty]: Start isEmpty. Operand 16758 states and 53312 transitions. [2021-06-05 03:57:16,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:57:16,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:16,368 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:16,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable708 [2021-06-05 03:57:16,569 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:16,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:16,569 INFO L82 PathProgramCache]: Analyzing trace with hash -624707419, now seen corresponding path program 416 times [2021-06-05 03:57:16,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:16,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710443500] [2021-06-05 03:57:16,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:16,616 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:57:16,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:16,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710443500] [2021-06-05 03:57:16,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710443500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:16,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340738160] [2021-06-05 03:57:16,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:16,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:57:16,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:16,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:57:16,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:16,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340738160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:16,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:16,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-06-05 03:57:16,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651142334] [2021-06-05 03:57:16,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:57:16,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:16,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:57:16,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:57:16,756 INFO L87 Difference]: Start difference. First operand 16758 states and 53312 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:17,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:17,698 INFO L93 Difference]: Finished difference Result 19755 states and 61167 transitions. [2021-06-05 03:57:17,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 03:57:17,698 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:57:17,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:17,723 INFO L225 Difference]: With dead ends: 19755 [2021-06-05 03:57:17,724 INFO L226 Difference]: Without dead ends: 19737 [2021-06-05 03:57:17,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2755 ImplicationChecksByTransitivity, 794.8ms TimeCoverageRelationStatistics Valid=2410, Invalid=6332, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 03:57:17,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19737 states. [2021-06-05 03:57:17,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19737 to 16856. [2021-06-05 03:57:17,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16856 states, 16855 states have (on average 3.18119252447345) internal successors, (53619), 16855 states have internal predecessors, (53619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:17,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16856 states to 16856 states and 53619 transitions. [2021-06-05 03:57:17,987 INFO L78 Accepts]: Start accepts. Automaton has 16856 states and 53619 transitions. Word has length 24 [2021-06-05 03:57:17,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:17,987 INFO L482 AbstractCegarLoop]: Abstraction has 16856 states and 53619 transitions. [2021-06-05 03:57:17,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:17,987 INFO L276 IsEmpty]: Start isEmpty. Operand 16856 states and 53619 transitions. [2021-06-05 03:57:18,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:57:18,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:18,006 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:18,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable709,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:18,206 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:18,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:18,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1664943217, now seen corresponding path program 417 times [2021-06-05 03:57:18,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:18,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675190491] [2021-06-05 03:57:18,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:57:18,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:18,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675190491] [2021-06-05 03:57:18,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675190491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:18,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089314874] [2021-06-05 03:57:18,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:18,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:57:18,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:18,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:57:18,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:18,407 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:18,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089314874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:18,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:18,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-06-05 03:57:18,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127828638] [2021-06-05 03:57:18,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 03:57:18,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:18,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 03:57:18,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:57:18,407 INFO L87 Difference]: Start difference. First operand 16856 states and 53619 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:19,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:19,303 INFO L93 Difference]: Finished difference Result 20000 states and 61915 transitions. [2021-06-05 03:57:19,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 03:57:19,304 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:57:19,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:19,332 INFO L225 Difference]: With dead ends: 20000 [2021-06-05 03:57:19,332 INFO L226 Difference]: Without dead ends: 19976 [2021-06-05 03:57:19,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2584 ImplicationChecksByTransitivity, 778.7ms TimeCoverageRelationStatistics Valid=2220, Invalid=5970, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 03:57:19,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19976 states. [2021-06-05 03:57:19,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19976 to 17037. [2021-06-05 03:57:19,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17037 states, 17036 states have (on average 3.181908898802536) internal successors, (54207), 17036 states have internal predecessors, (54207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:19,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17037 states to 17037 states and 54207 transitions. [2021-06-05 03:57:19,602 INFO L78 Accepts]: Start accepts. Automaton has 17037 states and 54207 transitions. Word has length 24 [2021-06-05 03:57:19,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:19,602 INFO L482 AbstractCegarLoop]: Abstraction has 17037 states and 54207 transitions. [2021-06-05 03:57:19,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:19,602 INFO L276 IsEmpty]: Start isEmpty. Operand 17037 states and 54207 transitions. [2021-06-05 03:57:19,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:57:19,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:19,624 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:19,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable710 [2021-06-05 03:57:19,837 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:19,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:19,837 INFO L82 PathProgramCache]: Analyzing trace with hash 447485413, now seen corresponding path program 418 times [2021-06-05 03:57:19,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:19,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137111297] [2021-06-05 03:57:19,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:19,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:19,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137111297] [2021-06-05 03:57:19,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137111297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:19,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093035774] [2021-06-05 03:57:19,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:19,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:57:19,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:19,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:57:19,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:20,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093035774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:20,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:20,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-06-05 03:57:20,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552879491] [2021-06-05 03:57:20,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 03:57:20,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:20,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 03:57:20,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:57:20,049 INFO L87 Difference]: Start difference. First operand 17037 states and 54207 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:20,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:20,897 INFO L93 Difference]: Finished difference Result 19762 states and 61367 transitions. [2021-06-05 03:57:20,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 03:57:20,898 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:57:20,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:20,923 INFO L225 Difference]: With dead ends: 19762 [2021-06-05 03:57:20,923 INFO L226 Difference]: Without dead ends: 19732 [2021-06-05 03:57:20,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2409 ImplicationChecksByTransitivity, 756.1ms TimeCoverageRelationStatistics Valid=2129, Invalid=5703, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 03:57:20,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19732 states. [2021-06-05 03:57:21,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19732 to 17071. [2021-06-05 03:57:21,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17071 states, 17070 states have (on average 3.1825424721734037) internal successors, (54326), 17070 states have internal predecessors, (54326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:21,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17071 states to 17071 states and 54326 transitions. [2021-06-05 03:57:21,187 INFO L78 Accepts]: Start accepts. Automaton has 17071 states and 54326 transitions. Word has length 24 [2021-06-05 03:57:21,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:21,187 INFO L482 AbstractCegarLoop]: Abstraction has 17071 states and 54326 transitions. [2021-06-05 03:57:21,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:21,187 INFO L276 IsEmpty]: Start isEmpty. Operand 17071 states and 54326 transitions. [2021-06-05 03:57:21,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:57:21,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:21,206 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:21,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable711,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:21,406 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:21,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:21,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1685657901, now seen corresponding path program 419 times [2021-06-05 03:57:21,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:21,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559008811] [2021-06-05 03:57:21,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:21,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:21,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559008811] [2021-06-05 03:57:21,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559008811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:21,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509726595] [2021-06-05 03:57:21,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:21,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:57:21,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:21,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:57:21,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:21,636 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:21,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509726595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:21,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:21,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 03:57:21,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238674019] [2021-06-05 03:57:21,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 03:57:21,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:21,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 03:57:21,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:57:21,637 INFO L87 Difference]: Start difference. First operand 17071 states and 54326 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:22,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:22,503 INFO L93 Difference]: Finished difference Result 18326 states and 57555 transitions. [2021-06-05 03:57:22,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 03:57:22,503 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:57:22,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:22,529 INFO L225 Difference]: With dead ends: 18326 [2021-06-05 03:57:22,529 INFO L226 Difference]: Without dead ends: 18326 [2021-06-05 03:57:22,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1972 ImplicationChecksByTransitivity, 721.4ms TimeCoverageRelationStatistics Valid=1794, Invalid=4526, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 03:57:22,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18326 states. [2021-06-05 03:57:22,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18326 to 17148. [2021-06-05 03:57:22,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17148 states, 17147 states have (on average 3.1787484691199626) internal successors, (54506), 17147 states have internal predecessors, (54506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:22,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17148 states to 17148 states and 54506 transitions. [2021-06-05 03:57:22,783 INFO L78 Accepts]: Start accepts. Automaton has 17148 states and 54506 transitions. Word has length 24 [2021-06-05 03:57:22,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:22,783 INFO L482 AbstractCegarLoop]: Abstraction has 17148 states and 54506 transitions. [2021-06-05 03:57:22,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:22,783 INFO L276 IsEmpty]: Start isEmpty. Operand 17148 states and 54506 transitions. [2021-06-05 03:57:22,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:57:22,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:22,803 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:23,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable712 [2021-06-05 03:57:23,003 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:23,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:23,004 INFO L82 PathProgramCache]: Analyzing trace with hash 518617555, now seen corresponding path program 420 times [2021-06-05 03:57:23,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:23,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074808240] [2021-06-05 03:57:23,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:23,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:23,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074808240] [2021-06-05 03:57:23,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074808240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:23,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957969414] [2021-06-05 03:57:23,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:23,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:57:23,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:23,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:57:23,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:23,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957969414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:23,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:23,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-06-05 03:57:23,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508411868] [2021-06-05 03:57:23,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 03:57:23,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:23,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 03:57:23,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:57:23,217 INFO L87 Difference]: Start difference. First operand 17148 states and 54506 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:23,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:23,984 INFO L93 Difference]: Finished difference Result 19278 states and 60184 transitions. [2021-06-05 03:57:23,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 03:57:23,984 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:57:23,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:24,013 INFO L225 Difference]: With dead ends: 19278 [2021-06-05 03:57:24,013 INFO L226 Difference]: Without dead ends: 19278 [2021-06-05 03:57:24,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 622.8ms TimeCoverageRelationStatistics Valid=1413, Invalid=3699, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 03:57:24,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19278 states. [2021-06-05 03:57:24,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19278 to 17371. [2021-06-05 03:57:24,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17371 states, 17370 states have (on average 3.1773172135866434) internal successors, (55190), 17370 states have internal predecessors, (55190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:24,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17371 states to 17371 states and 55190 transitions. [2021-06-05 03:57:24,319 INFO L78 Accepts]: Start accepts. Automaton has 17371 states and 55190 transitions. Word has length 24 [2021-06-05 03:57:24,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:24,319 INFO L482 AbstractCegarLoop]: Abstraction has 17371 states and 55190 transitions. [2021-06-05 03:57:24,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:24,320 INFO L276 IsEmpty]: Start isEmpty. Operand 17371 states and 55190 transitions. [2021-06-05 03:57:24,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:57:24,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:24,339 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:24,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:24,540 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:24,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:24,540 INFO L82 PathProgramCache]: Analyzing trace with hash 728270547, now seen corresponding path program 421 times [2021-06-05 03:57:24,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:24,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195680697] [2021-06-05 03:57:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:24,586 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:24,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:24,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195680697] [2021-06-05 03:57:24,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195680697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:24,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285098985] [2021-06-05 03:57:24,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:24,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:57:24,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:24,741 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:24,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285098985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:24,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:24,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-06-05 03:57:24,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977315562] [2021-06-05 03:57:24,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 03:57:24,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:24,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 03:57:24,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:57:24,742 INFO L87 Difference]: Start difference. First operand 17371 states and 55190 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:25,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:25,455 INFO L93 Difference]: Finished difference Result 20178 states and 62903 transitions. [2021-06-05 03:57:25,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 03:57:25,455 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:57:25,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:25,482 INFO L225 Difference]: With dead ends: 20178 [2021-06-05 03:57:25,482 INFO L226 Difference]: Without dead ends: 20178 [2021-06-05 03:57:25,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 591.7ms TimeCoverageRelationStatistics Valid=1369, Invalid=3461, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 03:57:25,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20178 states. [2021-06-05 03:57:25,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20178 to 17685. [2021-06-05 03:57:25,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17685 states, 17684 states have (on average 3.17852295860665) internal successors, (56209), 17684 states have internal predecessors, (56209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:25,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17685 states to 17685 states and 56209 transitions. [2021-06-05 03:57:25,759 INFO L78 Accepts]: Start accepts. Automaton has 17685 states and 56209 transitions. Word has length 24 [2021-06-05 03:57:25,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:25,759 INFO L482 AbstractCegarLoop]: Abstraction has 17685 states and 56209 transitions. [2021-06-05 03:57:25,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:25,759 INFO L276 IsEmpty]: Start isEmpty. Operand 17685 states and 56209 transitions. [2021-06-05 03:57:25,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:57:25,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:25,780 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:25,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:25,980 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:25,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:25,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1012128211, now seen corresponding path program 422 times [2021-06-05 03:57:25,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:25,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115898119] [2021-06-05 03:57:25,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:26,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:26,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115898119] [2021-06-05 03:57:26,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115898119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:26,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242194025] [2021-06-05 03:57:26,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:26,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:57:26,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:26,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:57:26,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:26,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242194025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:26,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:26,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2021-06-05 03:57:26,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842110595] [2021-06-05 03:57:26,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:57:26,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:26,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:57:26,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:57:26,173 INFO L87 Difference]: Start difference. First operand 17685 states and 56209 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:26,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:26,939 INFO L93 Difference]: Finished difference Result 21110 states and 65699 transitions. [2021-06-05 03:57:26,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 03:57:26,940 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:57:26,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:26,969 INFO L225 Difference]: With dead ends: 21110 [2021-06-05 03:57:26,969 INFO L226 Difference]: Without dead ends: 21110 [2021-06-05 03:57:26,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 602.0ms TimeCoverageRelationStatistics Valid=1403, Invalid=3289, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 03:57:26,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21110 states. [2021-06-05 03:57:27,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21110 to 18003. [2021-06-05 03:57:27,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18003 states, 18002 states have (on average 3.180702144206199) internal successors, (57259), 18002 states have internal predecessors, (57259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:27,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18003 states to 18003 states and 57259 transitions. [2021-06-05 03:57:27,252 INFO L78 Accepts]: Start accepts. Automaton has 18003 states and 57259 transitions. Word has length 24 [2021-06-05 03:57:27,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:27,253 INFO L482 AbstractCegarLoop]: Abstraction has 18003 states and 57259 transitions. [2021-06-05 03:57:27,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:27,253 INFO L276 IsEmpty]: Start isEmpty. Operand 18003 states and 57259 transitions. [2021-06-05 03:57:27,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:57:27,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:27,273 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:27,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable715,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:27,474 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:27,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:27,474 INFO L82 PathProgramCache]: Analyzing trace with hash -2026756397, now seen corresponding path program 423 times [2021-06-05 03:57:27,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:27,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509290406] [2021-06-05 03:57:27,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:27,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:27,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509290406] [2021-06-05 03:57:27,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509290406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:27,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643378357] [2021-06-05 03:57:27,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:27,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 03:57:27,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:27,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:57:27,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:27,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643378357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:27,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:27,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 23 [2021-06-05 03:57:27,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936173462] [2021-06-05 03:57:27,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:57:27,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:27,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:57:27,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:57:27,654 INFO L87 Difference]: Start difference. First operand 18003 states and 57259 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:28,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:28,498 INFO L93 Difference]: Finished difference Result 22604 states and 70090 transitions. [2021-06-05 03:57:28,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 03:57:28,498 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:57:28,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:28,530 INFO L225 Difference]: With dead ends: 22604 [2021-06-05 03:57:28,530 INFO L226 Difference]: Without dead ends: 22604 [2021-06-05 03:57:28,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 605.0ms TimeCoverageRelationStatistics Valid=1595, Invalid=3375, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 03:57:28,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22604 states. [2021-06-05 03:57:28,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22604 to 18724. [2021-06-05 03:57:28,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18724 states, 18723 states have (on average 3.182395983549645) internal successors, (59584), 18723 states have internal predecessors, (59584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:28,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18724 states to 18724 states and 59584 transitions. [2021-06-05 03:57:28,848 INFO L78 Accepts]: Start accepts. Automaton has 18724 states and 59584 transitions. Word has length 24 [2021-06-05 03:57:28,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:28,848 INFO L482 AbstractCegarLoop]: Abstraction has 18724 states and 59584 transitions. [2021-06-05 03:57:28,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:28,848 INFO L276 IsEmpty]: Start isEmpty. Operand 18724 states and 59584 transitions. [2021-06-05 03:57:28,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:57:28,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:28,871 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:29,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable716 [2021-06-05 03:57:29,071 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:29,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:29,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1893087699, now seen corresponding path program 424 times [2021-06-05 03:57:29,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:29,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776940312] [2021-06-05 03:57:29,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:29,104 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:29,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:29,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776940312] [2021-06-05 03:57:29,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776940312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:29,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043006284] [2021-06-05 03:57:29,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:29,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:57:29,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:29,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:57:29,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:29,242 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:29,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043006284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:29,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:29,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 22 [2021-06-05 03:57:29,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587373798] [2021-06-05 03:57:29,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:57:29,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:29,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:57:29,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:57:29,242 INFO L87 Difference]: Start difference. First operand 18724 states and 59584 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:29,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:29,980 INFO L93 Difference]: Finished difference Result 26877 states and 83547 transitions. [2021-06-05 03:57:29,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 03:57:29,980 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:57:29,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:30,020 INFO L225 Difference]: With dead ends: 26877 [2021-06-05 03:57:30,020 INFO L226 Difference]: Without dead ends: 26877 [2021-06-05 03:57:30,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 567.7ms TimeCoverageRelationStatistics Valid=1679, Invalid=3151, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 03:57:30,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26877 states. [2021-06-05 03:57:30,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26877 to 23210. [2021-06-05 03:57:30,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23210 states, 23209 states have (on average 3.1894092808824164) internal successors, (74023), 23209 states have internal predecessors, (74023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:30,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23210 states to 23210 states and 74023 transitions. [2021-06-05 03:57:30,408 INFO L78 Accepts]: Start accepts. Automaton has 23210 states and 74023 transitions. Word has length 24 [2021-06-05 03:57:30,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:30,408 INFO L482 AbstractCegarLoop]: Abstraction has 23210 states and 74023 transitions. [2021-06-05 03:57:30,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:30,408 INFO L276 IsEmpty]: Start isEmpty. Operand 23210 states and 74023 transitions. [2021-06-05 03:57:30,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:57:30,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:30,433 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:30,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:30,634 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:30,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:30,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1830424791, now seen corresponding path program 425 times [2021-06-05 03:57:30,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:30,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65405531] [2021-06-05 03:57:30,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:57:30,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:30,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65405531] [2021-06-05 03:57:30,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65405531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:30,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211053131] [2021-06-05 03:57:30,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:30,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:57:30,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:30,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:57:30,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:30,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211053131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:30,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:30,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 22 [2021-06-05 03:57:30,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499143453] [2021-06-05 03:57:30,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:57:30,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:30,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:57:30,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:57:30,804 INFO L87 Difference]: Start difference. First operand 23210 states and 74023 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:32,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:32,094 INFO L93 Difference]: Finished difference Result 25835 states and 80460 transitions. [2021-06-05 03:57:32,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 03:57:32,094 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:57:32,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:32,134 INFO L225 Difference]: With dead ends: 25835 [2021-06-05 03:57:32,134 INFO L226 Difference]: Without dead ends: 25829 [2021-06-05 03:57:32,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4960 ImplicationChecksByTransitivity, 1063.6ms TimeCoverageRelationStatistics Valid=3452, Invalid=8980, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 03:57:32,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25829 states. [2021-06-05 03:57:32,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25829 to 23125. [2021-06-05 03:57:32,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23125 states, 23124 states have (on average 3.187900017298045) internal successors, (73717), 23124 states have internal predecessors, (73717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:32,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23125 states to 23125 states and 73717 transitions. [2021-06-05 03:57:32,520 INFO L78 Accepts]: Start accepts. Automaton has 23125 states and 73717 transitions. Word has length 24 [2021-06-05 03:57:32,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:32,520 INFO L482 AbstractCegarLoop]: Abstraction has 23125 states and 73717 transitions. [2021-06-05 03:57:32,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:32,520 INFO L276 IsEmpty]: Start isEmpty. Operand 23125 states and 73717 transitions. [2021-06-05 03:57:32,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:57:32,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:32,546 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:32,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:32,746 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:32,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:32,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1295194989, now seen corresponding path program 426 times [2021-06-05 03:57:32,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:32,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496390831] [2021-06-05 03:57:32,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:57:32,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:32,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496390831] [2021-06-05 03:57:32,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496390831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:32,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918889421] [2021-06-05 03:57:32,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:32,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:57:32,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:32,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:57:32,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:32,922 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:32,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918889421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:32,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:32,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 23 [2021-06-05 03:57:32,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674098315] [2021-06-05 03:57:32,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:57:32,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:32,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:57:32,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:57:32,923 INFO L87 Difference]: Start difference. First operand 23125 states and 73717 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:34,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:34,096 INFO L93 Difference]: Finished difference Result 25817 states and 80521 transitions. [2021-06-05 03:57:34,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 03:57:34,097 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:57:34,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:34,138 INFO L225 Difference]: With dead ends: 25817 [2021-06-05 03:57:34,138 INFO L226 Difference]: Without dead ends: 25805 [2021-06-05 03:57:34,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4219 ImplicationChecksByTransitivity, 942.2ms TimeCoverageRelationStatistics Valid=2955, Invalid=7965, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 03:57:34,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25805 states. [2021-06-05 03:57:34,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25805 to 23100. [2021-06-05 03:57:34,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23100 states, 23099 states have (on average 3.188536300272739) internal successors, (73652), 23099 states have internal predecessors, (73652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:34,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23100 states to 23100 states and 73652 transitions. [2021-06-05 03:57:34,555 INFO L78 Accepts]: Start accepts. Automaton has 23100 states and 73652 transitions. Word has length 24 [2021-06-05 03:57:34,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:34,555 INFO L482 AbstractCegarLoop]: Abstraction has 23100 states and 73652 transitions. [2021-06-05 03:57:34,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:34,556 INFO L276 IsEmpty]: Start isEmpty. Operand 23100 states and 73652 transitions. [2021-06-05 03:57:34,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:57:34,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:34,582 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:34,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable719,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:34,782 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:34,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:34,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1882940311, now seen corresponding path program 427 times [2021-06-05 03:57:34,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:34,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739086096] [2021-06-05 03:57:34,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:57:34,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:34,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739086096] [2021-06-05 03:57:34,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739086096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:34,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475503910] [2021-06-05 03:57:34,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:34,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:57:34,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:35,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475503910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:35,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:35,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2021-06-05 03:57:35,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226609625] [2021-06-05 03:57:35,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:57:35,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:35,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:57:35,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:57:35,074 INFO L87 Difference]: Start difference. First operand 23100 states and 73652 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:36,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:36,122 INFO L93 Difference]: Finished difference Result 25937 states and 80963 transitions. [2021-06-05 03:57:36,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 03:57:36,122 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:57:36,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:36,159 INFO L225 Difference]: With dead ends: 25937 [2021-06-05 03:57:36,159 INFO L226 Difference]: Without dead ends: 25919 [2021-06-05 03:57:36,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3615 ImplicationChecksByTransitivity, 866.1ms TimeCoverageRelationStatistics Valid=2546, Invalid=7156, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 03:57:36,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25919 states. [2021-06-05 03:57:36,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25919 to 23155. [2021-06-05 03:57:36,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23155 states, 23154 states have (on average 3.18916817828453) internal successors, (73842), 23154 states have internal predecessors, (73842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:36,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23155 states to 23155 states and 73842 transitions. [2021-06-05 03:57:36,551 INFO L78 Accepts]: Start accepts. Automaton has 23155 states and 73842 transitions. Word has length 24 [2021-06-05 03:57:36,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:36,551 INFO L482 AbstractCegarLoop]: Abstraction has 23155 states and 73842 transitions. [2021-06-05 03:57:36,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:36,551 INFO L276 IsEmpty]: Start isEmpty. Operand 23155 states and 73842 transitions. [2021-06-05 03:57:36,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:57:36,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:36,576 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:36,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable720 [2021-06-05 03:57:36,777 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:36,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:36,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1371791187, now seen corresponding path program 428 times [2021-06-05 03:57:36,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:36,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778667492] [2021-06-05 03:57:36,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:57:36,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:36,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778667492] [2021-06-05 03:57:36,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778667492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:36,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746291128] [2021-06-05 03:57:36,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:36,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:57:36,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:36,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:57:36,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:36,986 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:36,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746291128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:36,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:36,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-06-05 03:57:36,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098571648] [2021-06-05 03:57:36,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 03:57:36,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:36,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 03:57:36,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:57:36,987 INFO L87 Difference]: Start difference. First operand 23155 states and 73842 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:37,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:37,939 INFO L93 Difference]: Finished difference Result 26264 states and 82006 transitions. [2021-06-05 03:57:37,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 03:57:37,939 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:57:37,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:37,978 INFO L225 Difference]: With dead ends: 26264 [2021-06-05 03:57:37,978 INFO L226 Difference]: Without dead ends: 26240 [2021-06-05 03:57:37,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3134 ImplicationChecksByTransitivity, 803.0ms TimeCoverageRelationStatistics Valid=2232, Invalid=6510, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 03:57:37,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26240 states. [2021-06-05 03:57:38,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26240 to 23691. [2021-06-05 03:57:38,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23691 states, 23690 states have (on average 3.1908400168847617) internal successors, (75591), 23690 states have internal predecessors, (75591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:38,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23691 states to 23691 states and 75591 transitions. [2021-06-05 03:57:38,426 INFO L78 Accepts]: Start accepts. Automaton has 23691 states and 75591 transitions. Word has length 24 [2021-06-05 03:57:38,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:38,426 INFO L482 AbstractCegarLoop]: Abstraction has 23691 states and 75591 transitions. [2021-06-05 03:57:38,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:38,426 INFO L276 IsEmpty]: Start isEmpty. Operand 23691 states and 75591 transitions. [2021-06-05 03:57:38,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:57:38,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:38,452 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:38,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable721 [2021-06-05 03:57:38,653 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:38,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:38,653 INFO L82 PathProgramCache]: Analyzing trace with hash -810747479, now seen corresponding path program 429 times [2021-06-05 03:57:38,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:38,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707825290] [2021-06-05 03:57:38,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:38,714 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:57:38,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:38,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707825290] [2021-06-05 03:57:38,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707825290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:38,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163475842] [2021-06-05 03:57:38,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:38,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:57:38,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:38,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:57:38,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:38,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163475842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:38,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:38,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-06-05 03:57:38,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965534210] [2021-06-05 03:57:38,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 03:57:38,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:38,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 03:57:38,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:57:38,867 INFO L87 Difference]: Start difference. First operand 23691 states and 75591 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:39,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:39,788 INFO L93 Difference]: Finished difference Result 26956 states and 84218 transitions. [2021-06-05 03:57:39,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 03:57:39,788 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:57:39,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:39,826 INFO L225 Difference]: With dead ends: 26956 [2021-06-05 03:57:39,827 INFO L226 Difference]: Without dead ends: 26926 [2021-06-05 03:57:39,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 773.6ms TimeCoverageRelationStatistics Valid=2019, Invalid=5991, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 03:57:39,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26926 states. [2021-06-05 03:57:40,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26926 to 24343. [2021-06-05 03:57:40,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24343 states, 24342 states have (on average 3.1921370470791226) internal successors, (77703), 24342 states have internal predecessors, (77703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:40,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24343 states to 24343 states and 77703 transitions. [2021-06-05 03:57:40,255 INFO L78 Accepts]: Start accepts. Automaton has 24343 states and 77703 transitions. Word has length 24 [2021-06-05 03:57:40,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:40,255 INFO L482 AbstractCegarLoop]: Abstraction has 24343 states and 77703 transitions. [2021-06-05 03:57:40,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:40,255 INFO L276 IsEmpty]: Start isEmpty. Operand 24343 states and 77703 transitions. [2021-06-05 03:57:40,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 03:57:40,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:40,286 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:40,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable722 [2021-06-05 03:57:40,486 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:40,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:40,486 INFO L82 PathProgramCache]: Analyzing trace with hash 250030611, now seen corresponding path program 430 times [2021-06-05 03:57:40,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:40,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016424988] [2021-06-05 03:57:40,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:40,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:40,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:40,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016424988] [2021-06-05 03:57:40,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016424988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:40,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564472856] [2021-06-05 03:57:40,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:40,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:57:40,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:40,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:57:40,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:40,712 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:40,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564472856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:40,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:40,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 03:57:40,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548643470] [2021-06-05 03:57:40,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 03:57:40,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:40,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 03:57:40,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:57:40,713 INFO L87 Difference]: Start difference. First operand 24343 states and 77703 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:41,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:41,533 INFO L93 Difference]: Finished difference Result 26813 states and 84024 transitions. [2021-06-05 03:57:41,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 03:57:41,534 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 03:57:41,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:41,572 INFO L225 Difference]: With dead ends: 26813 [2021-06-05 03:57:41,573 INFO L226 Difference]: Without dead ends: 26777 [2021-06-05 03:57:41,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2479 ImplicationChecksByTransitivity, 693.5ms TimeCoverageRelationStatistics Valid=1912, Invalid=5570, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 03:57:41,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26777 states. [2021-06-05 03:57:41,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26777 to 24407. [2021-06-05 03:57:41,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24407 states, 24406 states have (on average 3.1917561255428994) internal successors, (77898), 24406 states have internal predecessors, (77898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:42,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24407 states to 24407 states and 77898 transitions. [2021-06-05 03:57:42,040 INFO L78 Accepts]: Start accepts. Automaton has 24407 states and 77898 transitions. Word has length 24 [2021-06-05 03:57:42,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:42,040 INFO L482 AbstractCegarLoop]: Abstraction has 24407 states and 77898 transitions. [2021-06-05 03:57:42,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:42,040 INFO L276 IsEmpty]: Start isEmpty. Operand 24407 states and 77898 transitions. [2021-06-05 03:57:42,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:42,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:42,069 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:42,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable723,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:42,270 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:42,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:42,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1425864693, now seen corresponding path program 431 times [2021-06-05 03:57:42,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:42,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629857342] [2021-06-05 03:57:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:42,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:42,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629857342] [2021-06-05 03:57:42,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629857342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:42,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449473300] [2021-06-05 03:57:42,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:42,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:57:42,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:42,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:57:42,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:42,600 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:42,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449473300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:42,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:42,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 03:57:42,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738077598] [2021-06-05 03:57:42,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:57:42,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:42,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:57:42,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:57:42,600 INFO L87 Difference]: Start difference. First operand 24407 states and 77898 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:43,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:43,155 INFO L93 Difference]: Finished difference Result 24899 states and 78823 transitions. [2021-06-05 03:57:43,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 03:57:43,156 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:43,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:43,197 INFO L225 Difference]: With dead ends: 24899 [2021-06-05 03:57:43,197 INFO L226 Difference]: Without dead ends: 24867 [2021-06-05 03:57:43,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 391.0ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-06-05 03:57:43,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24867 states. [2021-06-05 03:57:43,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24867 to 24479. [2021-06-05 03:57:43,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24479 states, 24478 states have (on average 3.185145845248795) internal successors, (77966), 24478 states have internal predecessors, (77966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:43,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24479 states to 24479 states and 77966 transitions. [2021-06-05 03:57:43,606 INFO L78 Accepts]: Start accepts. Automaton has 24479 states and 77966 transitions. Word has length 25 [2021-06-05 03:57:43,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:43,606 INFO L482 AbstractCegarLoop]: Abstraction has 24479 states and 77966 transitions. [2021-06-05 03:57:43,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:43,606 INFO L276 IsEmpty]: Start isEmpty. Operand 24479 states and 77966 transitions. [2021-06-05 03:57:43,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:43,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:43,636 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:43,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:43,837 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:43,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:43,837 INFO L82 PathProgramCache]: Analyzing trace with hash 983845119, now seen corresponding path program 432 times [2021-06-05 03:57:43,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:43,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906528088] [2021-06-05 03:57:43,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:43,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:43,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:43,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906528088] [2021-06-05 03:57:43,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906528088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:43,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024502633] [2021-06-05 03:57:43,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:44,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:57:44,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:44,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:57:44,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:44,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024502633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:44,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:44,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-06-05 03:57:44,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794802063] [2021-06-05 03:57:44,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:57:44,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:44,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:57:44,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:57:44,177 INFO L87 Difference]: Start difference. First operand 24479 states and 77966 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:44,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:44,560 INFO L93 Difference]: Finished difference Result 25039 states and 79187 transitions. [2021-06-05 03:57:44,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:57:44,560 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:44,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:44,600 INFO L225 Difference]: With dead ends: 25039 [2021-06-05 03:57:44,600 INFO L226 Difference]: Without dead ends: 25032 [2021-06-05 03:57:44,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 308.7ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:57:44,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25032 states. [2021-06-05 03:57:45,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25032 to 24640. [2021-06-05 03:57:45,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24640 states, 24639 states have (on average 3.186979991071066) internal successors, (78524), 24639 states have internal predecessors, (78524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:45,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24640 states to 24640 states and 78524 transitions. [2021-06-05 03:57:45,135 INFO L78 Accepts]: Start accepts. Automaton has 24640 states and 78524 transitions. Word has length 25 [2021-06-05 03:57:45,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:45,135 INFO L482 AbstractCegarLoop]: Abstraction has 24640 states and 78524 transitions. [2021-06-05 03:57:45,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:45,135 INFO L276 IsEmpty]: Start isEmpty. Operand 24640 states and 78524 transitions. [2021-06-05 03:57:45,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:45,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:45,164 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:45,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable727,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:45,365 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:45,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:45,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1696419453, now seen corresponding path program 433 times [2021-06-05 03:57:45,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:45,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303355306] [2021-06-05 03:57:45,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:45,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:45,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303355306] [2021-06-05 03:57:45,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303355306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:45,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671699270] [2021-06-05 03:57:45,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:45,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:57:45,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:45,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671699270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:45,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:45,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-06-05 03:57:45,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433906765] [2021-06-05 03:57:45,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:57:45,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:45,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:57:45,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:57:45,701 INFO L87 Difference]: Start difference. First operand 24640 states and 78524 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:46,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:46,130 INFO L93 Difference]: Finished difference Result 25025 states and 79167 transitions. [2021-06-05 03:57:46,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:57:46,130 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:46,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:46,167 INFO L225 Difference]: With dead ends: 25025 [2021-06-05 03:57:46,168 INFO L226 Difference]: Without dead ends: 25009 [2021-06-05 03:57:46,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 325.4ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:57:46,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25009 states. [2021-06-05 03:57:46,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25009 to 24488. [2021-06-05 03:57:46,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:46,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-06-05 03:57:46,568 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-06-05 03:57:46,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:46,568 INFO L482 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-06-05 03:57:46,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:46,569 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-06-05 03:57:46,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:46,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:46,596 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:46,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-06-05 03:57:46,811 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:46,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:46,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1555299925, now seen corresponding path program 434 times [2021-06-05 03:57:46,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:46,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880412035] [2021-06-05 03:57:46,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:46,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:46,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880412035] [2021-06-05 03:57:46,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880412035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:46,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174414947] [2021-06-05 03:57:46,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:46,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:57:46,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:46,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:57:46,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:47,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174414947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:47,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:47,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 03:57:47,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780087882] [2021-06-05 03:57:47,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:57:47,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:47,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:57:47,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:57:47,164 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:47,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:47,562 INFO L93 Difference]: Finished difference Result 24884 states and 78643 transitions. [2021-06-05 03:57:47,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:57:47,562 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:47,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:47,600 INFO L225 Difference]: With dead ends: 24884 [2021-06-05 03:57:47,601 INFO L226 Difference]: Without dead ends: 24877 [2021-06-05 03:57:47,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 330.9ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:57:47,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24877 states. [2021-06-05 03:57:47,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24877 to 24488. [2021-06-05 03:57:47,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:48,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-06-05 03:57:48,001 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-06-05 03:57:48,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:48,001 INFO L482 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-06-05 03:57:48,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:48,001 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-06-05 03:57:48,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:48,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:48,028 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:48,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable733 [2021-06-05 03:57:48,229 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:48,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:48,229 INFO L82 PathProgramCache]: Analyzing trace with hash 2090529727, now seen corresponding path program 435 times [2021-06-05 03:57:48,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:48,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159031224] [2021-06-05 03:57:48,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:48,383 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:48,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:48,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159031224] [2021-06-05 03:57:48,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159031224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:48,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851554642] [2021-06-05 03:57:48,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:48,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:57:48,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:48,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:57:48,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:48,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851554642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:48,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:48,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 03:57:48,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723471535] [2021-06-05 03:57:48,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:57:48,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:48,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:57:48,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:57:48,682 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:49,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:49,137 INFO L93 Difference]: Finished difference Result 24901 states and 78668 transitions. [2021-06-05 03:57:49,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:57:49,137 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:49,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:49,174 INFO L225 Difference]: With dead ends: 24901 [2021-06-05 03:57:49,174 INFO L226 Difference]: Without dead ends: 24894 [2021-06-05 03:57:49,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 326.5ms TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:57:49,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24894 states. [2021-06-05 03:57:49,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24894 to 24488. [2021-06-05 03:57:49,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:49,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-06-05 03:57:49,557 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-06-05 03:57:49,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:49,558 INFO L482 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-06-05 03:57:49,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:49,558 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-06-05 03:57:49,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:49,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:49,584 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:49,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:49,784 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:49,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:49,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1502784405, now seen corresponding path program 436 times [2021-06-05 03:57:49,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:49,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668016458] [2021-06-05 03:57:49,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:49,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:49,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668016458] [2021-06-05 03:57:49,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668016458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:49,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248461142] [2021-06-05 03:57:49,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:49,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:57:49,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:49,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:57:49,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:50,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248461142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:50,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:50,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 03:57:50,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600139598] [2021-06-05 03:57:50,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:57:50,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:50,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:57:50,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:57:50,102 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:50,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:50,595 INFO L93 Difference]: Finished difference Result 24921 states and 78698 transitions. [2021-06-05 03:57:50,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:57:50,595 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:50,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:50,633 INFO L225 Difference]: With dead ends: 24921 [2021-06-05 03:57:50,633 INFO L226 Difference]: Without dead ends: 24914 [2021-06-05 03:57:50,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 342.4ms TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:57:50,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24914 states. [2021-06-05 03:57:50,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24914 to 24488. [2021-06-05 03:57:50,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:51,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-06-05 03:57:51,014 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-06-05 03:57:51,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:51,014 INFO L482 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-06-05 03:57:51,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:51,014 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-06-05 03:57:51,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:51,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:51,042 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:51,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:51,242 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:51,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:51,242 INFO L82 PathProgramCache]: Analyzing trace with hash 462548607, now seen corresponding path program 437 times [2021-06-05 03:57:51,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:51,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543602281] [2021-06-05 03:57:51,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:51,393 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:51,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:51,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543602281] [2021-06-05 03:57:51,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543602281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:51,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287021749] [2021-06-05 03:57:51,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:51,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:57:51,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:51,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:57:51,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:51,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287021749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:51,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:51,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 03:57:51,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913080945] [2021-06-05 03:57:51,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:57:51,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:51,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:57:51,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:57:51,576 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:52,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:52,128 INFO L93 Difference]: Finished difference Result 24944 states and 78733 transitions. [2021-06-05 03:57:52,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:57:52,128 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:52,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:52,170 INFO L225 Difference]: With dead ends: 24944 [2021-06-05 03:57:52,170 INFO L226 Difference]: Without dead ends: 24937 [2021-06-05 03:57:52,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 361.8ms TimeCoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:57:52,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24937 states. [2021-06-05 03:57:52,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24937 to 24488. [2021-06-05 03:57:52,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:52,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-06-05 03:57:52,582 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-06-05 03:57:52,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:52,582 INFO L482 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-06-05 03:57:52,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:52,582 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-06-05 03:57:52,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:52,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:52,610 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:52,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-06-05 03:57:52,811 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:52,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:52,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1719990059, now seen corresponding path program 438 times [2021-06-05 03:57:52,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:52,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548055795] [2021-06-05 03:57:52,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:52,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:52,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548055795] [2021-06-05 03:57:52,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548055795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:52,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44106087] [2021-06-05 03:57:52,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:52,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:57:52,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:52,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:57:52,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:53,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44106087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:53,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:53,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 03:57:53,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556120494] [2021-06-05 03:57:53,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:57:53,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:53,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:57:53,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:57:53,138 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:53,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:53,695 INFO L93 Difference]: Finished difference Result 24802 states and 78491 transitions. [2021-06-05 03:57:53,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 03:57:53,695 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:53,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:53,733 INFO L225 Difference]: With dead ends: 24802 [2021-06-05 03:57:53,733 INFO L226 Difference]: Without dead ends: 24795 [2021-06-05 03:57:53,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 369.0ms TimeCoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-06-05 03:57:53,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24795 states. [2021-06-05 03:57:54,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24795 to 24488. [2021-06-05 03:57:54,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:54,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-06-05 03:57:54,108 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-06-05 03:57:54,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:54,108 INFO L482 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-06-05 03:57:54,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:54,108 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-06-05 03:57:54,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:54,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:54,136 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:54,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable745,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:54,337 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:54,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:54,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1617763643, now seen corresponding path program 439 times [2021-06-05 03:57:54,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:54,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525146478] [2021-06-05 03:57:54,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:54,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:54,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525146478] [2021-06-05 03:57:54,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525146478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:54,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956272033] [2021-06-05 03:57:54,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:54,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:57:54,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:54,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956272033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:54,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:54,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 23 [2021-06-05 03:57:54,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357317357] [2021-06-05 03:57:54,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:57:54,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:54,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:57:54,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:57:54,731 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:55,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:55,052 INFO L93 Difference]: Finished difference Result 25074 states and 79435 transitions. [2021-06-05 03:57:55,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:57:55,053 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:55,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:55,096 INFO L225 Difference]: With dead ends: 25074 [2021-06-05 03:57:55,096 INFO L226 Difference]: Without dead ends: 25067 [2021-06-05 03:57:55,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 352.8ms TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:57:55,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25067 states. [2021-06-05 03:57:55,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25067 to 24661. [2021-06-05 03:57:55,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24661 states, 24660 states have (on average 3.1872668288726684) internal successors, (78598), 24660 states have internal predecessors, (78598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:55,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 78598 transitions. [2021-06-05 03:57:55,554 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 78598 transitions. Word has length 25 [2021-06-05 03:57:55,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:55,554 INFO L482 AbstractCegarLoop]: Abstraction has 24661 states and 78598 transitions. [2021-06-05 03:57:55,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:55,554 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 78598 transitions. [2021-06-05 03:57:55,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:55,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:55,581 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:55,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable748,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:55,781 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:55,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:55,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1062500929, now seen corresponding path program 440 times [2021-06-05 03:57:55,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:55,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181251681] [2021-06-05 03:57:55,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:55,934 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:55,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:55,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181251681] [2021-06-05 03:57:55,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181251681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:55,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408862202] [2021-06-05 03:57:55,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:55,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:57:55,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:55,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:57:55,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:56,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408862202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:56,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:56,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 23 [2021-06-05 03:57:56,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679635413] [2021-06-05 03:57:56,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:57:56,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:56,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:57:56,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:57:56,176 INFO L87 Difference]: Start difference. First operand 24661 states and 78598 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:56,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:56,511 INFO L93 Difference]: Finished difference Result 25075 states and 79432 transitions. [2021-06-05 03:57:56,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:57:56,511 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:56,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:56,547 INFO L225 Difference]: With dead ends: 25075 [2021-06-05 03:57:56,547 INFO L226 Difference]: Without dead ends: 25066 [2021-06-05 03:57:56,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 365.5ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:57:56,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25066 states. [2021-06-05 03:57:56,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25066 to 24661. [2021-06-05 03:57:56,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24661 states, 24660 states have (on average 3.1870235198702352) internal successors, (78592), 24660 states have internal predecessors, (78592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 78592 transitions. [2021-06-05 03:57:56,940 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 78592 transitions. Word has length 25 [2021-06-05 03:57:56,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:56,940 INFO L482 AbstractCegarLoop]: Abstraction has 24661 states and 78592 transitions. [2021-06-05 03:57:56,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:56,941 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 78592 transitions. [2021-06-05 03:57:56,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:56,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:56,968 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:57,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-06-05 03:57:57,168 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:57,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:57,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1153172539, now seen corresponding path program 441 times [2021-06-05 03:57:57,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:57,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870389860] [2021-06-05 03:57:57,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:57,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:57,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870389860] [2021-06-05 03:57:57,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870389860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:57,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426261339] [2021-06-05 03:57:57,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:57,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 03:57:57,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:57,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:57:57,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:57,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426261339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:57,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:57,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-06-05 03:57:57,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565592043] [2021-06-05 03:57:57,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:57:57,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:57,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:57:57,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:57:57,554 INFO L87 Difference]: Start difference. First operand 24661 states and 78592 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:57,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:57,882 INFO L93 Difference]: Finished difference Result 24947 states and 79111 transitions. [2021-06-05 03:57:57,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:57:57,882 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:57,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:57,918 INFO L225 Difference]: With dead ends: 24947 [2021-06-05 03:57:57,918 INFO L226 Difference]: Without dead ends: 24940 [2021-06-05 03:57:57,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 353.2ms TimeCoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:57:57,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24940 states. [2021-06-05 03:57:58,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24940 to 24661. [2021-06-05 03:57:58,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24661 states, 24660 states have (on average 3.1870235198702352) internal successors, (78592), 24660 states have internal predecessors, (78592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:58,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 78592 transitions. [2021-06-05 03:57:58,384 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 78592 transitions. Word has length 25 [2021-06-05 03:57:58,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:58,384 INFO L482 AbstractCegarLoop]: Abstraction has 24661 states and 78592 transitions. [2021-06-05 03:57:58,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:58,384 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 78592 transitions. [2021-06-05 03:57:58,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:58,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:58,412 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:58,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable754 [2021-06-05 03:57:58,612 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:58,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:58,612 INFO L82 PathProgramCache]: Analyzing trace with hash -205598593, now seen corresponding path program 442 times [2021-06-05 03:57:58,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:58,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451325749] [2021-06-05 03:57:58,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:58,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:58,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:58,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451325749] [2021-06-05 03:57:58,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451325749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:58,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132109114] [2021-06-05 03:57:58,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:58,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:57:58,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:58,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:57:58,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:58,959 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:58,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132109114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:58,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:58,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2021-06-05 03:57:58,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030432463] [2021-06-05 03:57:58,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:57:58,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:58,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:57:58,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:57:58,960 INFO L87 Difference]: Start difference. First operand 24661 states and 78592 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:59,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:59,354 INFO L93 Difference]: Finished difference Result 25694 states and 81409 transitions. [2021-06-05 03:57:59,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:57:59,355 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:57:59,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:59,390 INFO L225 Difference]: With dead ends: 25694 [2021-06-05 03:57:59,390 INFO L226 Difference]: Without dead ends: 25677 [2021-06-05 03:57:59,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 342.2ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:57:59,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25677 states. [2021-06-05 03:57:59,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25677 to 25073. [2021-06-05 03:57:59,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25073 states, 25072 states have (on average 3.1924058710912573) internal successors, (80040), 25072 states have internal predecessors, (80040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:59,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25073 states to 25073 states and 80040 transitions. [2021-06-05 03:57:59,782 INFO L78 Accepts]: Start accepts. Automaton has 25073 states and 80040 transitions. Word has length 25 [2021-06-05 03:57:59,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:59,782 INFO L482 AbstractCegarLoop]: Abstraction has 25073 states and 80040 transitions. [2021-06-05 03:57:59,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:59,782 INFO L276 IsEmpty]: Start isEmpty. Operand 25073 states and 80040 transitions. [2021-06-05 03:57:59,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:57:59,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:59,809 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:00,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:00,009 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:00,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:00,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1409104131, now seen corresponding path program 443 times [2021-06-05 03:58:00,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:00,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579176519] [2021-06-05 03:58:00,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:00,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:00,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579176519] [2021-06-05 03:58:00,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579176519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:00,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286893979] [2021-06-05 03:58:00,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:00,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 03:58:00,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:00,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:00,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:00,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286893979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:00,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:00,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2021-06-05 03:58:00,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589192258] [2021-06-05 03:58:00,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:58:00,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:00,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:58:00,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:58:00,361 INFO L87 Difference]: Start difference. First operand 25073 states and 80040 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:00,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:00,740 INFO L93 Difference]: Finished difference Result 25700 states and 81360 transitions. [2021-06-05 03:58:00,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:58:00,741 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:00,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:00,777 INFO L225 Difference]: With dead ends: 25700 [2021-06-05 03:58:00,777 INFO L226 Difference]: Without dead ends: 25682 [2021-06-05 03:58:00,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 337.6ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:58:00,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25682 states. [2021-06-05 03:58:01,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25682 to 24970. [2021-06-05 03:58:01,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24970 states, 24969 states have (on average 3.1887140053666547) internal successors, (79619), 24969 states have internal predecessors, (79619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:01,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24970 states to 24970 states and 79619 transitions. [2021-06-05 03:58:01,314 INFO L78 Accepts]: Start accepts. Automaton has 24970 states and 79619 transitions. Word has length 25 [2021-06-05 03:58:01,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:01,314 INFO L482 AbstractCegarLoop]: Abstraction has 24970 states and 79619 transitions. [2021-06-05 03:58:01,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:01,314 INFO L276 IsEmpty]: Start isEmpty. Operand 24970 states and 79619 transitions. [2021-06-05 03:58:01,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:01,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:01,344 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:01,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable760 [2021-06-05 03:58:01,544 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:01,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:01,544 INFO L82 PathProgramCache]: Analyzing trace with hash -670189697, now seen corresponding path program 444 times [2021-06-05 03:58:01,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:01,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527021403] [2021-06-05 03:58:01,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:01,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:01,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:01,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527021403] [2021-06-05 03:58:01,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527021403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:01,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053448974] [2021-06-05 03:58:01,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:01,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 03:58:01,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:01,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:01,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:01,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053448974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:01,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:01,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-06-05 03:58:01,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183870194] [2021-06-05 03:58:01,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:01,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:01,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:01,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:01,941 INFO L87 Difference]: Start difference. First operand 24970 states and 79619 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:02,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:02,398 INFO L93 Difference]: Finished difference Result 25480 states and 80657 transitions. [2021-06-05 03:58:02,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:58:02,399 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:02,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:02,437 INFO L225 Difference]: With dead ends: 25480 [2021-06-05 03:58:02,437 INFO L226 Difference]: Without dead ends: 25458 [2021-06-05 03:58:02,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 390.4ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:58:02,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25458 states. [2021-06-05 03:58:02,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25458 to 24939. [2021-06-05 03:58:02,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24939 states, 24938 states have (on average 3.1885876974897744) internal successors, (79517), 24938 states have internal predecessors, (79517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:02,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24939 states to 24939 states and 79517 transitions. [2021-06-05 03:58:02,890 INFO L78 Accepts]: Start accepts. Automaton has 24939 states and 79517 transitions. Word has length 25 [2021-06-05 03:58:02,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:02,890 INFO L482 AbstractCegarLoop]: Abstraction has 24939 states and 79517 transitions. [2021-06-05 03:58:02,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:02,890 INFO L276 IsEmpty]: Start isEmpty. Operand 24939 states and 79517 transitions. [2021-06-05 03:58:02,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:02,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:02,917 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:03,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable763 [2021-06-05 03:58:03,117 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:03,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:03,117 INFO L82 PathProgramCache]: Analyzing trace with hash -703788925, now seen corresponding path program 445 times [2021-06-05 03:58:03,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:03,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164433009] [2021-06-05 03:58:03,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:03,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:03,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:03,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164433009] [2021-06-05 03:58:03,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164433009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:03,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902193515] [2021-06-05 03:58:03,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:03,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:03,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:03,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902193515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:03,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:03,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-06-05 03:58:03,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465041519] [2021-06-05 03:58:03,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:03,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:03,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:03,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:03,491 INFO L87 Difference]: Start difference. First operand 24939 states and 79517 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:03,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:03,867 INFO L93 Difference]: Finished difference Result 25309 states and 80217 transitions. [2021-06-05 03:58:03,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:58:03,867 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:03,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:03,904 INFO L225 Difference]: With dead ends: 25309 [2021-06-05 03:58:03,904 INFO L226 Difference]: Without dead ends: 25302 [2021-06-05 03:58:03,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 354.2ms TimeCoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:58:03,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25302 states. [2021-06-05 03:58:04,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25302 to 24939. [2021-06-05 03:58:04,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24939 states, 24938 states have (on average 3.1885876974897744) internal successors, (79517), 24938 states have internal predecessors, (79517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:04,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24939 states to 24939 states and 79517 transitions. [2021-06-05 03:58:04,309 INFO L78 Accepts]: Start accepts. Automaton has 24939 states and 79517 transitions. Word has length 25 [2021-06-05 03:58:04,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:04,309 INFO L482 AbstractCegarLoop]: Abstraction has 24939 states and 79517 transitions. [2021-06-05 03:58:04,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:04,309 INFO L276 IsEmpty]: Start isEmpty. Operand 24939 states and 79517 transitions. [2021-06-05 03:58:04,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:04,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:04,338 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:04,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable766,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:04,539 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:04,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:04,539 INFO L82 PathProgramCache]: Analyzing trace with hash 323843797, now seen corresponding path program 446 times [2021-06-05 03:58:04,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:04,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754115598] [2021-06-05 03:58:04,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:04,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:04,678 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:04,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:04,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754115598] [2021-06-05 03:58:04,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754115598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:04,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293387749] [2021-06-05 03:58:04,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:04,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:58:04,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:04,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:04,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:04,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293387749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:04,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:04,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-06-05 03:58:04,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686765558] [2021-06-05 03:58:04,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:04,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:04,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:04,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:04,900 INFO L87 Difference]: Start difference. First operand 24939 states and 79517 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:05,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:05,224 INFO L93 Difference]: Finished difference Result 25226 states and 80018 transitions. [2021-06-05 03:58:05,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:58:05,224 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:05,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:05,261 INFO L225 Difference]: With dead ends: 25226 [2021-06-05 03:58:05,261 INFO L226 Difference]: Without dead ends: 25213 [2021-06-05 03:58:05,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 328.3ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:58:05,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25213 states. [2021-06-05 03:58:05,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25213 to 24914. [2021-06-05 03:58:05,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24914 states, 24913 states have (on average 3.1877333119255007) internal successors, (79416), 24913 states have internal predecessors, (79416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:05,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24914 states to 24914 states and 79416 transitions. [2021-06-05 03:58:05,740 INFO L78 Accepts]: Start accepts. Automaton has 24914 states and 79416 transitions. Word has length 25 [2021-06-05 03:58:05,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:05,740 INFO L482 AbstractCegarLoop]: Abstraction has 24914 states and 79416 transitions. [2021-06-05 03:58:05,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:05,740 INFO L276 IsEmpty]: Start isEmpty. Operand 24914 states and 79416 transitions. [2021-06-05 03:58:05,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:05,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:05,768 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:05,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable769,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:05,969 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:05,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:05,969 INFO L82 PathProgramCache]: Analyzing trace with hash -895253061, now seen corresponding path program 447 times [2021-06-05 03:58:05,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:05,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160971003] [2021-06-05 03:58:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:05,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:06,126 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:06,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:06,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160971003] [2021-06-05 03:58:06,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160971003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:06,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001571031] [2021-06-05 03:58:06,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:06,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 03:58:06,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:06,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:06,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:06,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001571031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:06,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:06,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 23 [2021-06-05 03:58:06,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254406083] [2021-06-05 03:58:06,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:58:06,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:06,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:58:06,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:58:06,326 INFO L87 Difference]: Start difference. First operand 24914 states and 79416 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:06,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:06,758 INFO L93 Difference]: Finished difference Result 26019 states and 82469 transitions. [2021-06-05 03:58:06,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:58:06,758 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:06,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:06,799 INFO L225 Difference]: With dead ends: 26019 [2021-06-05 03:58:06,799 INFO L226 Difference]: Without dead ends: 26002 [2021-06-05 03:58:06,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 362.0ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:58:06,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26002 states. [2021-06-05 03:58:07,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26002 to 25397. [2021-06-05 03:58:07,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25397 states, 25396 states have (on average 3.193416286029296) internal successors, (81100), 25396 states have internal predecessors, (81100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:07,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25397 states to 25397 states and 81100 transitions. [2021-06-05 03:58:07,243 INFO L78 Accepts]: Start accepts. Automaton has 25397 states and 81100 transitions. Word has length 25 [2021-06-05 03:58:07,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:07,243 INFO L482 AbstractCegarLoop]: Abstraction has 25397 states and 81100 transitions. [2021-06-05 03:58:07,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:07,243 INFO L276 IsEmpty]: Start isEmpty. Operand 25397 states and 81100 transitions. [2021-06-05 03:58:07,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:07,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:07,273 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:07,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable772 [2021-06-05 03:58:07,473 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:07,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:07,473 INFO L82 PathProgramCache]: Analyzing trace with hash 719449663, now seen corresponding path program 448 times [2021-06-05 03:58:07,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:07,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058527047] [2021-06-05 03:58:07,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:07,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:07,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058527047] [2021-06-05 03:58:07,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058527047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:07,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620479286] [2021-06-05 03:58:07,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:07,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:58:07,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:07,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:07,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:07,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620479286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:07,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:07,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 23 [2021-06-05 03:58:07,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243270156] [2021-06-05 03:58:07,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:58:07,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:07,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:58:07,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:58:07,840 INFO L87 Difference]: Start difference. First operand 25397 states and 81100 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:08,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:08,246 INFO L93 Difference]: Finished difference Result 26023 states and 82394 transitions. [2021-06-05 03:58:08,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:58:08,246 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:08,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:08,288 INFO L225 Difference]: With dead ends: 26023 [2021-06-05 03:58:08,288 INFO L226 Difference]: Without dead ends: 26005 [2021-06-05 03:58:08,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 348.1ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:58:08,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26005 states. [2021-06-05 03:58:08,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26005 to 25282. [2021-06-05 03:58:08,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25282 states, 25281 states have (on average 3.189628574819034) internal successors, (80637), 25281 states have internal predecessors, (80637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:08,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25282 states to 25282 states and 80637 transitions. [2021-06-05 03:58:08,742 INFO L78 Accepts]: Start accepts. Automaton has 25282 states and 80637 transitions. Word has length 25 [2021-06-05 03:58:08,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:08,742 INFO L482 AbstractCegarLoop]: Abstraction has 25282 states and 80637 transitions. [2021-06-05 03:58:08,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:08,742 INFO L276 IsEmpty]: Start isEmpty. Operand 25282 states and 80637 transitions. [2021-06-05 03:58:08,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:08,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:08,776 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:08,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable775 [2021-06-05 03:58:08,989 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:08,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:08,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1359844165, now seen corresponding path program 449 times [2021-06-05 03:58:08,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:08,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52761756] [2021-06-05 03:58:08,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:09,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:09,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52761756] [2021-06-05 03:58:09,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52761756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:09,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461355355] [2021-06-05 03:58:09,131 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:09,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 03:58:09,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:09,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:09,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:09,339 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:09,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461355355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:09,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:09,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-06-05 03:58:09,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307670116] [2021-06-05 03:58:09,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:09,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:09,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:09,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:09,340 INFO L87 Difference]: Start difference. First operand 25282 states and 80637 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:09,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:09,839 INFO L93 Difference]: Finished difference Result 25873 states and 81826 transitions. [2021-06-05 03:58:09,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:58:09,839 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:09,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:09,875 INFO L225 Difference]: With dead ends: 25873 [2021-06-05 03:58:09,875 INFO L226 Difference]: Without dead ends: 25851 [2021-06-05 03:58:09,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 350.2ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:58:09,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25851 states. [2021-06-05 03:58:10,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25851 to 25224. [2021-06-05 03:58:10,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25224 states, 25223 states have (on average 3.1875669032232485) internal successors, (80400), 25223 states have internal predecessors, (80400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:10,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25224 states to 25224 states and 80400 transitions. [2021-06-05 03:58:10,279 INFO L78 Accepts]: Start accepts. Automaton has 25224 states and 80400 transitions. Word has length 25 [2021-06-05 03:58:10,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:10,279 INFO L482 AbstractCegarLoop]: Abstraction has 25224 states and 80400 transitions. [2021-06-05 03:58:10,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:10,279 INFO L276 IsEmpty]: Start isEmpty. Operand 25224 states and 80400 transitions. [2021-06-05 03:58:10,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:10,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:10,306 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:10,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 453 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable778 [2021-06-05 03:58:10,507 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:10,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:10,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1393443393, now seen corresponding path program 450 times [2021-06-05 03:58:10,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:10,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703808676] [2021-06-05 03:58:10,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:10,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:10,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703808676] [2021-06-05 03:58:10,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703808676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:10,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280949525] [2021-06-05 03:58:10,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:10,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 03:58:10,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:10,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:10,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:10,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280949525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:10,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:10,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-06-05 03:58:10,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868855137] [2021-06-05 03:58:10,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:10,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:10,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:10,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:10,902 INFO L87 Difference]: Start difference. First operand 25224 states and 80400 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:11,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:11,369 INFO L93 Difference]: Finished difference Result 25707 states and 81351 transitions. [2021-06-05 03:58:11,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:58:11,369 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:11,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:11,407 INFO L225 Difference]: With dead ends: 25707 [2021-06-05 03:58:11,407 INFO L226 Difference]: Without dead ends: 25681 [2021-06-05 03:58:11,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 400.5ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:58:11,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25681 states. [2021-06-05 03:58:11,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25681 to 25191. [2021-06-05 03:58:11,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25191 states, 25190 states have (on average 3.1873362445414846) internal successors, (80289), 25190 states have internal predecessors, (80289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:11,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25191 states to 25191 states and 80289 transitions. [2021-06-05 03:58:11,816 INFO L78 Accepts]: Start accepts. Automaton has 25191 states and 80289 transitions. Word has length 25 [2021-06-05 03:58:11,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:11,816 INFO L482 AbstractCegarLoop]: Abstraction has 25191 states and 80289 transitions. [2021-06-05 03:58:11,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:11,816 INFO L276 IsEmpty]: Start isEmpty. Operand 25191 states and 80289 transitions. [2021-06-05 03:58:11,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:11,844 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:11,844 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:12,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,454 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:12,044 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:12,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:12,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1859947835, now seen corresponding path program 451 times [2021-06-05 03:58:12,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:12,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481088207] [2021-06-05 03:58:12,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:12,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:12,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481088207] [2021-06-05 03:58:12,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481088207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:12,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340414320] [2021-06-05 03:58:12,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:12,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:12,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:12,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:12,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340414320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:12,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:12,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-06-05 03:58:12,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132599778] [2021-06-05 03:58:12,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:12,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:12,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:12,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:12,361 INFO L87 Difference]: Start difference. First operand 25191 states and 80289 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:12,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:12,780 INFO L93 Difference]: Finished difference Result 25528 states and 80917 transitions. [2021-06-05 03:58:12,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:58:12,780 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:12,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:12,817 INFO L225 Difference]: With dead ends: 25528 [2021-06-05 03:58:12,817 INFO L226 Difference]: Without dead ends: 25521 [2021-06-05 03:58:12,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 317.4ms TimeCoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:58:12,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25521 states. [2021-06-05 03:58:13,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25521 to 25191. [2021-06-05 03:58:13,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25191 states, 25190 states have (on average 3.1873362445414846) internal successors, (80289), 25190 states have internal predecessors, (80289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:13,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25191 states to 25191 states and 80289 transitions. [2021-06-05 03:58:13,320 INFO L78 Accepts]: Start accepts. Automaton has 25191 states and 80289 transitions. Word has length 25 [2021-06-05 03:58:13,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:13,320 INFO L482 AbstractCegarLoop]: Abstraction has 25191 states and 80289 transitions. [2021-06-05 03:58:13,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:13,320 INFO L276 IsEmpty]: Start isEmpty. Operand 25191 states and 80289 transitions. [2021-06-05 03:58:13,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:13,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:13,349 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:13,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable784 [2021-06-05 03:58:13,550 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:13,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:13,550 INFO L82 PathProgramCache]: Analyzing trace with hash 519987609, now seen corresponding path program 452 times [2021-06-05 03:58:13,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:13,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222625156] [2021-06-05 03:58:13,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:13,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:13,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:13,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222625156] [2021-06-05 03:58:13,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222625156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:13,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202053674] [2021-06-05 03:58:13,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:13,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:58:13,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:13,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:13,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:13,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202053674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:13,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:13,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-06-05 03:58:13,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433168973] [2021-06-05 03:58:13,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:13,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:13,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:13,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:13,930 INFO L87 Difference]: Start difference. First operand 25191 states and 80289 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:14,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:14,260 INFO L93 Difference]: Finished difference Result 25433 states and 80707 transitions. [2021-06-05 03:58:14,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:58:14,260 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:14,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:14,301 INFO L225 Difference]: With dead ends: 25433 [2021-06-05 03:58:14,301 INFO L226 Difference]: Without dead ends: 25420 [2021-06-05 03:58:14,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 333.6ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:58:14,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25420 states. [2021-06-05 03:58:14,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25420 to 25149. [2021-06-05 03:58:14,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25149 states, 25148 states have (on average 3.185819945920153) internal successors, (80117), 25148 states have internal predecessors, (80117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:14,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25149 states to 25149 states and 80117 transitions. [2021-06-05 03:58:14,738 INFO L78 Accepts]: Start accepts. Automaton has 25149 states and 80117 transitions. Word has length 25 [2021-06-05 03:58:14,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:14,738 INFO L482 AbstractCegarLoop]: Abstraction has 25149 states and 80117 transitions. [2021-06-05 03:58:14,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:14,738 INFO L276 IsEmpty]: Start isEmpty. Operand 25149 states and 80117 transitions. [2021-06-05 03:58:14,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:14,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:14,767 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:14,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable787,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:14,968 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:14,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:14,968 INFO L82 PathProgramCache]: Analyzing trace with hash -799705089, now seen corresponding path program 453 times [2021-06-05 03:58:14,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:14,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421810754] [2021-06-05 03:58:14,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:14,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:15,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:15,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421810754] [2021-06-05 03:58:15,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421810754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:15,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647556419] [2021-06-05 03:58:15,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:15,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 03:58:15,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:15,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:15,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:15,316 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:15,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647556419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:15,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:15,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-06-05 03:58:15,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999368565] [2021-06-05 03:58:15,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:58:15,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:15,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:58:15,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:58:15,317 INFO L87 Difference]: Start difference. First operand 25149 states and 80117 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:15,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:15,724 INFO L93 Difference]: Finished difference Result 26300 states and 83236 transitions. [2021-06-05 03:58:15,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:58:15,725 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:15,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:15,769 INFO L225 Difference]: With dead ends: 26300 [2021-06-05 03:58:15,769 INFO L226 Difference]: Without dead ends: 26283 [2021-06-05 03:58:15,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 335.4ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:58:15,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26283 states. [2021-06-05 03:58:16,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26283 to 25645. [2021-06-05 03:58:16,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25645 states, 25644 states have (on average 3.1899469661519264) internal successors, (81803), 25644 states have internal predecessors, (81803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:16,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25645 states to 25645 states and 81803 transitions. [2021-06-05 03:58:16,228 INFO L78 Accepts]: Start accepts. Automaton has 25645 states and 81803 transitions. Word has length 25 [2021-06-05 03:58:16,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:16,228 INFO L482 AbstractCegarLoop]: Abstraction has 25645 states and 81803 transitions. [2021-06-05 03:58:16,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:16,229 INFO L276 IsEmpty]: Start isEmpty. Operand 25645 states and 81803 transitions. [2021-06-05 03:58:16,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:16,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:16,268 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:16,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable790,457 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:16,469 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:16,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:16,469 INFO L82 PathProgramCache]: Analyzing trace with hash 814997635, now seen corresponding path program 454 times [2021-06-05 03:58:16,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:16,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738190188] [2021-06-05 03:58:16,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:16,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:16,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738190188] [2021-06-05 03:58:16,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738190188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:16,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125478368] [2021-06-05 03:58:16,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:16,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:58:16,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:16,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:16,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:16,811 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:16,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125478368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:16,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:16,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-06-05 03:58:16,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116171219] [2021-06-05 03:58:16,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:58:16,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:16,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:58:16,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:58:16,812 INFO L87 Difference]: Start difference. First operand 25645 states and 81803 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:17,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:17,196 INFO L93 Difference]: Finished difference Result 26302 states and 83129 transitions. [2021-06-05 03:58:17,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:58:17,196 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:17,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:17,241 INFO L225 Difference]: With dead ends: 26302 [2021-06-05 03:58:17,241 INFO L226 Difference]: Without dead ends: 26284 [2021-06-05 03:58:17,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 331.4ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:58:17,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26284 states. [2021-06-05 03:58:17,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26284 to 25519. [2021-06-05 03:58:17,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25519 states, 25518 states have (on average 3.186966063171095) internal successors, (81325), 25518 states have internal predecessors, (81325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:17,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25519 states to 25519 states and 81325 transitions. [2021-06-05 03:58:17,755 INFO L78 Accepts]: Start accepts. Automaton has 25519 states and 81325 transitions. Word has length 25 [2021-06-05 03:58:17,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:17,755 INFO L482 AbstractCegarLoop]: Abstraction has 25519 states and 81325 transitions. [2021-06-05 03:58:17,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:17,755 INFO L276 IsEmpty]: Start isEmpty. Operand 25519 states and 81325 transitions. [2021-06-05 03:58:17,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:17,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:17,790 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:17,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable793 [2021-06-05 03:58:17,990 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:17,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:17,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1264296193, now seen corresponding path program 455 times [2021-06-05 03:58:17,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:17,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107447459] [2021-06-05 03:58:17,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:18,128 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:18,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:18,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107447459] [2021-06-05 03:58:18,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107447459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:18,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032974771] [2021-06-05 03:58:18,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:18,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 03:58:18,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:18,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:18,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:18,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032974771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:18,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:18,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-05 03:58:18,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148324528] [2021-06-05 03:58:18,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:18,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:18,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:18,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:18,326 INFO L87 Difference]: Start difference. First operand 25519 states and 81325 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:18,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:18,760 INFO L93 Difference]: Finished difference Result 26169 states and 82620 transitions. [2021-06-05 03:58:18,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:58:18,761 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:18,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:18,802 INFO L225 Difference]: With dead ends: 26169 [2021-06-05 03:58:18,802 INFO L226 Difference]: Without dead ends: 26147 [2021-06-05 03:58:18,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 335.5ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:58:18,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26147 states. [2021-06-05 03:58:19,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26147 to 25469. [2021-06-05 03:58:19,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25469 states, 25468 states have (on average 3.1853698759227265) internal successors, (81125), 25468 states have internal predecessors, (81125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:19,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25469 states to 25469 states and 81125 transitions. [2021-06-05 03:58:19,231 INFO L78 Accepts]: Start accepts. Automaton has 25469 states and 81125 transitions. Word has length 25 [2021-06-05 03:58:19,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:19,231 INFO L482 AbstractCegarLoop]: Abstraction has 25469 states and 81125 transitions. [2021-06-05 03:58:19,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:19,231 INFO L276 IsEmpty]: Start isEmpty. Operand 25469 states and 81125 transitions. [2021-06-05 03:58:19,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:19,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:19,259 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:19,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable796,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:19,460 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:19,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:19,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1297895421, now seen corresponding path program 456 times [2021-06-05 03:58:19,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:19,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073775913] [2021-06-05 03:58:19,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:19,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:19,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073775913] [2021-06-05 03:58:19,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073775913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:19,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109911395] [2021-06-05 03:58:19,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:19,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 03:58:19,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:19,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:19,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:19,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109911395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:19,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:19,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-05 03:58:19,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875636118] [2021-06-05 03:58:19,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:19,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:19,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:19,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:19,801 INFO L87 Difference]: Start difference. First operand 25469 states and 81125 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:20,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:20,325 INFO L93 Difference]: Finished difference Result 26109 states and 82367 transitions. [2021-06-05 03:58:20,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:58:20,325 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:20,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:20,363 INFO L225 Difference]: With dead ends: 26109 [2021-06-05 03:58:20,363 INFO L226 Difference]: Without dead ends: 26083 [2021-06-05 03:58:20,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 357.2ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:58:20,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26083 states. [2021-06-05 03:58:20,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26083 to 25423. [2021-06-05 03:58:20,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25423 states, 25422 states have (on average 3.1845645503894264) internal successors, (80958), 25422 states have internal predecessors, (80958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:20,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25423 states to 25423 states and 80958 transitions. [2021-06-05 03:58:20,778 INFO L78 Accepts]: Start accepts. Automaton has 25423 states and 80958 transitions. Word has length 25 [2021-06-05 03:58:20,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:20,778 INFO L482 AbstractCegarLoop]: Abstraction has 25423 states and 80958 transitions. [2021-06-05 03:58:20,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:20,778 INFO L276 IsEmpty]: Start isEmpty. Operand 25423 states and 80958 transitions. [2021-06-05 03:58:20,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:20,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:20,806 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:21,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable799,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:21,006 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:21,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:21,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1955495807, now seen corresponding path program 457 times [2021-06-05 03:58:21,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:21,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482335195] [2021-06-05 03:58:21,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:21,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:21,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482335195] [2021-06-05 03:58:21,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482335195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:21,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446421062] [2021-06-05 03:58:21,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:21,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:21,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:21,458 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:21,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446421062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:21,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:21,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-05 03:58:21,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293067777] [2021-06-05 03:58:21,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:21,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:21,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:21,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:21,458 INFO L87 Difference]: Start difference. First operand 25423 states and 80958 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:22,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:22,018 INFO L93 Difference]: Finished difference Result 25930 states and 81933 transitions. [2021-06-05 03:58:22,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:58:22,018 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:22,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:22,055 INFO L225 Difference]: With dead ends: 25930 [2021-06-05 03:58:22,055 INFO L226 Difference]: Without dead ends: 25900 [2021-06-05 03:58:22,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 391.3ms TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:58:22,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25900 states. [2021-06-05 03:58:22,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25900 to 25388. [2021-06-05 03:58:22,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25388 states, 25387 states have (on average 3.184425099460354) internal successors, (80843), 25387 states have internal predecessors, (80843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:22,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25388 states to 25388 states and 80843 transitions. [2021-06-05 03:58:22,459 INFO L78 Accepts]: Start accepts. Automaton has 25388 states and 80843 transitions. Word has length 25 [2021-06-05 03:58:22,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:22,459 INFO L482 AbstractCegarLoop]: Abstraction has 25388 states and 80843 transitions. [2021-06-05 03:58:22,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:22,459 INFO L276 IsEmpty]: Start isEmpty. Operand 25388 states and 80843 transitions. [2021-06-05 03:58:22,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:22,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:22,488 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:22,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable802 [2021-06-05 03:58:22,689 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:22,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:22,689 INFO L82 PathProgramCache]: Analyzing trace with hash -268591229, now seen corresponding path program 458 times [2021-06-05 03:58:22,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:22,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438968717] [2021-06-05 03:58:22,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:22,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:22,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438968717] [2021-06-05 03:58:22,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438968717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:22,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525387339] [2021-06-05 03:58:22,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:22,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:58:22,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:22,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:22,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:23,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525387339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:23,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:23,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-05 03:58:23,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654443829] [2021-06-05 03:58:23,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:23,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:23,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:23,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:23,023 INFO L87 Difference]: Start difference. First operand 25388 states and 80843 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:23,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:23,558 INFO L93 Difference]: Finished difference Result 25727 states and 81464 transitions. [2021-06-05 03:58:23,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:58:23,559 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:23,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:23,599 INFO L225 Difference]: With dead ends: 25727 [2021-06-05 03:58:23,599 INFO L226 Difference]: Without dead ends: 25720 [2021-06-05 03:58:23,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 355.0ms TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:58:23,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25720 states. [2021-06-05 03:58:23,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25720 to 25388. [2021-06-05 03:58:23,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25388 states, 25387 states have (on average 3.184425099460354) internal successors, (80843), 25387 states have internal predecessors, (80843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:24,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25388 states to 25388 states and 80843 transitions. [2021-06-05 03:58:24,033 INFO L78 Accepts]: Start accepts. Automaton has 25388 states and 80843 transitions. Word has length 25 [2021-06-05 03:58:24,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:24,033 INFO L482 AbstractCegarLoop]: Abstraction has 25388 states and 80843 transitions. [2021-06-05 03:58:24,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:24,033 INFO L276 IsEmpty]: Start isEmpty. Operand 25388 states and 80843 transitions. [2021-06-05 03:58:24,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:24,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:24,062 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:24,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable805,462 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:24,265 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:24,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:24,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1989488811, now seen corresponding path program 459 times [2021-06-05 03:58:24,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:24,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791709767] [2021-06-05 03:58:24,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:24,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:24,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791709767] [2021-06-05 03:58:24,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791709767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:24,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102475039] [2021-06-05 03:58:24,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:24,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:58:24,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:24,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:24,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:24,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102475039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:24,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:24,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-06-05 03:58:24,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103415855] [2021-06-05 03:58:24,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:24,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:24,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:24,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:24,608 INFO L87 Difference]: Start difference. First operand 25388 states and 80843 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:24,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:24,902 INFO L93 Difference]: Finished difference Result 25601 states and 81204 transitions. [2021-06-05 03:58:24,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:58:24,903 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:24,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:24,940 INFO L225 Difference]: With dead ends: 25601 [2021-06-05 03:58:24,941 INFO L226 Difference]: Without dead ends: 25588 [2021-06-05 03:58:24,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 313.4ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:58:24,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25588 states. [2021-06-05 03:58:25,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25588 to 25330. [2021-06-05 03:58:25,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25330 states, 25329 states have (on average 3.1820837774882547) internal successors, (80599), 25329 states have internal predecessors, (80599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:25,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25330 states to 25330 states and 80599 transitions. [2021-06-05 03:58:25,407 INFO L78 Accepts]: Start accepts. Automaton has 25330 states and 80599 transitions. Word has length 25 [2021-06-05 03:58:25,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:25,407 INFO L482 AbstractCegarLoop]: Abstraction has 25330 states and 80599 transitions. [2021-06-05 03:58:25,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:25,407 INFO L276 IsEmpty]: Start isEmpty. Operand 25330 states and 80599 transitions. [2021-06-05 03:58:25,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:25,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:25,434 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:25,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable808,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:25,634 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:25,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:25,635 INFO L82 PathProgramCache]: Analyzing trace with hash -2132685253, now seen corresponding path program 460 times [2021-06-05 03:58:25,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:25,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341095971] [2021-06-05 03:58:25,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:25,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:25,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341095971] [2021-06-05 03:58:25,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341095971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:25,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3740797] [2021-06-05 03:58:25,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:25,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:58:25,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:25,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:25,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:25,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3740797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:25,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:25,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-06-05 03:58:25,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830107441] [2021-06-05 03:58:25,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:58:25,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:25,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:58:25,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:58:25,964 INFO L87 Difference]: Start difference. First operand 25330 states and 80599 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:26,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:26,449 INFO L93 Difference]: Finished difference Result 26240 states and 82962 transitions. [2021-06-05 03:58:26,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:58:26,449 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:26,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:26,494 INFO L225 Difference]: With dead ends: 26240 [2021-06-05 03:58:26,495 INFO L226 Difference]: Without dead ends: 26223 [2021-06-05 03:58:26,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 318.8ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:58:26,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26223 states. [2021-06-05 03:58:26,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26223 to 25777. [2021-06-05 03:58:26,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25777 states, 25776 states have (on average 3.1840083798882683) internal successors, (82071), 25776 states have internal predecessors, (82071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:26,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25777 states to 25777 states and 82071 transitions. [2021-06-05 03:58:26,922 INFO L78 Accepts]: Start accepts. Automaton has 25777 states and 82071 transitions. Word has length 25 [2021-06-05 03:58:26,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:26,922 INFO L482 AbstractCegarLoop]: Abstraction has 25777 states and 82071 transitions. [2021-06-05 03:58:26,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:26,922 INFO L276 IsEmpty]: Start isEmpty. Operand 25777 states and 82071 transitions. [2021-06-05 03:58:26,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:26,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:26,956 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:27,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable811 [2021-06-05 03:58:27,156 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:27,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:27,157 INFO L82 PathProgramCache]: Analyzing trace with hash -517982529, now seen corresponding path program 461 times [2021-06-05 03:58:27,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:27,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810239789] [2021-06-05 03:58:27,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:27,305 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:27,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:27,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810239789] [2021-06-05 03:58:27,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810239789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:27,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519145752] [2021-06-05 03:58:27,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:27,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:58:27,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:27,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:27,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:27,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519145752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:27,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:27,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-06-05 03:58:27,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353845509] [2021-06-05 03:58:27,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:58:27,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:27,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:58:27,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:58:27,494 INFO L87 Difference]: Start difference. First operand 25777 states and 82071 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:27,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:27,905 INFO L93 Difference]: Finished difference Result 26238 states and 82828 transitions. [2021-06-05 03:58:27,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:58:27,905 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:27,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:27,945 INFO L225 Difference]: With dead ends: 26238 [2021-06-05 03:58:27,945 INFO L226 Difference]: Without dead ends: 26220 [2021-06-05 03:58:27,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 323.2ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:58:27,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26220 states. [2021-06-05 03:58:28,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26220 to 25645. [2021-06-05 03:58:28,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25645 states, 25644 states have (on average 3.181913897987833) internal successors, (81597), 25644 states have internal predecessors, (81597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:28,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25645 states to 25645 states and 81597 transitions. [2021-06-05 03:58:28,363 INFO L78 Accepts]: Start accepts. Automaton has 25645 states and 81597 transitions. Word has length 25 [2021-06-05 03:58:28,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:28,363 INFO L482 AbstractCegarLoop]: Abstraction has 25645 states and 81597 transitions. [2021-06-05 03:58:28,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:28,363 INFO L276 IsEmpty]: Start isEmpty. Operand 25645 states and 81597 transitions. [2021-06-05 03:58:28,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:28,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:28,398 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:28,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable814,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:28,598 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:28,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:28,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1697690939, now seen corresponding path program 462 times [2021-06-05 03:58:28,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:28,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122453381] [2021-06-05 03:58:28,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:28,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:28,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:28,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122453381] [2021-06-05 03:58:28,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122453381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:28,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491143564] [2021-06-05 03:58:28,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:28,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:58:28,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:28,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:28,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:28,928 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:28,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491143564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:28,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:28,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-05 03:58:28,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606043706] [2021-06-05 03:58:28,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:28,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:28,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:28,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:28,929 INFO L87 Difference]: Start difference. First operand 25645 states and 81597 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:29,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:29,419 INFO L93 Difference]: Finished difference Result 26128 states and 82385 transitions. [2021-06-05 03:58:29,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:58:29,419 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:29,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:29,455 INFO L225 Difference]: With dead ends: 26128 [2021-06-05 03:58:29,455 INFO L226 Difference]: Without dead ends: 26106 [2021-06-05 03:58:29,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 325.7ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:58:29,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26106 states. [2021-06-05 03:58:29,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26106 to 25607. [2021-06-05 03:58:29,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25607 states, 25606 states have (on average 3.180465515894712) internal successors, (81439), 25606 states have internal predecessors, (81439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:29,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25607 states to 25607 states and 81439 transitions. [2021-06-05 03:58:29,859 INFO L78 Accepts]: Start accepts. Automaton has 25607 states and 81439 transitions. Word has length 25 [2021-06-05 03:58:29,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:29,859 INFO L482 AbstractCegarLoop]: Abstraction has 25607 states and 81439 transitions. [2021-06-05 03:58:29,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:29,859 INFO L276 IsEmpty]: Start isEmpty. Operand 25607 states and 81439 transitions. [2021-06-05 03:58:29,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:29,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:29,892 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:30,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable817,466 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:30,093 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:30,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:30,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1664091711, now seen corresponding path program 463 times [2021-06-05 03:58:30,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:30,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752236810] [2021-06-05 03:58:30,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:30,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:30,240 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:30,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:30,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752236810] [2021-06-05 03:58:30,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752236810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:30,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907030010] [2021-06-05 03:58:30,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:30,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:30,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:30,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907030010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:30,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:30,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-05 03:58:30,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433333737] [2021-06-05 03:58:30,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:30,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:30,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:30,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:30,422 INFO L87 Difference]: Start difference. First operand 25607 states and 81439 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:30,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:30,919 INFO L93 Difference]: Finished difference Result 26123 states and 82279 transitions. [2021-06-05 03:58:30,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:58:30,919 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:30,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:30,958 INFO L225 Difference]: With dead ends: 26123 [2021-06-05 03:58:30,958 INFO L226 Difference]: Without dead ends: 26097 [2021-06-05 03:58:30,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 343.2ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:58:30,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26097 states. [2021-06-05 03:58:31,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26097 to 25568. [2021-06-05 03:58:31,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25568 states, 25567 states have (on average 3.179645636953886) internal successors, (81294), 25567 states have internal predecessors, (81294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:31,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25568 states to 25568 states and 81294 transitions. [2021-06-05 03:58:31,374 INFO L78 Accepts]: Start accepts. Automaton has 25568 states and 81294 transitions. Word has length 25 [2021-06-05 03:58:31,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:31,374 INFO L482 AbstractCegarLoop]: Abstraction has 25568 states and 81294 transitions. [2021-06-05 03:58:31,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:31,375 INFO L276 IsEmpty]: Start isEmpty. Operand 25568 states and 81294 transitions. [2021-06-05 03:58:31,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:31,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:31,407 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:31,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable820,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:31,608 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:31,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:31,608 INFO L82 PathProgramCache]: Analyzing trace with hash 622515643, now seen corresponding path program 464 times [2021-06-05 03:58:31,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:31,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745871918] [2021-06-05 03:58:31,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:31,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:31,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745871918] [2021-06-05 03:58:31,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745871918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:31,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967431344] [2021-06-05 03:58:31,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:31,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:58:31,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:31,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:31,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:31,921 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:31,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967431344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:31,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:31,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-05 03:58:31,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853501884] [2021-06-05 03:58:31,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:31,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:31,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:31,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:31,921 INFO L87 Difference]: Start difference. First operand 25568 states and 81294 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:32,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:32,524 INFO L93 Difference]: Finished difference Result 26123 states and 82191 transitions. [2021-06-05 03:58:32,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:58:32,528 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:32,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:32,569 INFO L225 Difference]: With dead ends: 26123 [2021-06-05 03:58:32,569 INFO L226 Difference]: Without dead ends: 26093 [2021-06-05 03:58:32,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 349.8ms TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:58:32,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26093 states. [2021-06-05 03:58:32,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26093 to 25530. [2021-06-05 03:58:33,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25530 states, 25529 states have (on average 3.179286301852795) internal successors, (81164), 25529 states have internal predecessors, (81164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:33,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25530 states to 25530 states and 81164 transitions. [2021-06-05 03:58:33,078 INFO L78 Accepts]: Start accepts. Automaton has 25530 states and 81164 transitions. Word has length 25 [2021-06-05 03:58:33,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:33,078 INFO L482 AbstractCegarLoop]: Abstraction has 25530 states and 81164 transitions. [2021-06-05 03:58:33,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:33,078 INFO L276 IsEmpty]: Start isEmpty. Operand 25530 states and 81164 transitions. [2021-06-05 03:58:33,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:33,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:33,107 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:33,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable823,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:33,307 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:33,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:33,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1601571393, now seen corresponding path program 465 times [2021-06-05 03:58:33,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:33,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40277683] [2021-06-05 03:58:33,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:33,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:33,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40277683] [2021-06-05 03:58:33,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40277683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:33,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429876803] [2021-06-05 03:58:33,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:33,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:58:33,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:33,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:33,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:33,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429876803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:33,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:33,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-05 03:58:33,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942517020] [2021-06-05 03:58:33,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:33,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:33,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:33,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:33,653 INFO L87 Difference]: Start difference. First operand 25530 states and 81164 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:34,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:34,191 INFO L93 Difference]: Finished difference Result 25971 states and 81876 transitions. [2021-06-05 03:58:34,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:58:34,191 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:34,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:34,230 INFO L225 Difference]: With dead ends: 25971 [2021-06-05 03:58:34,230 INFO L226 Difference]: Without dead ends: 25937 [2021-06-05 03:58:34,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 372.4ms TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-06-05 03:58:34,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25937 states. [2021-06-05 03:58:34,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25937 to 25500. [2021-06-05 03:58:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25500 states, 25499 states have (on average 3.179379583513079) internal successors, (81071), 25499 states have internal predecessors, (81071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:34,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25500 states to 25500 states and 81071 transitions. [2021-06-05 03:58:34,641 INFO L78 Accepts]: Start accepts. Automaton has 25500 states and 81071 transitions. Word has length 25 [2021-06-05 03:58:34,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:34,642 INFO L482 AbstractCegarLoop]: Abstraction has 25500 states and 81071 transitions. [2021-06-05 03:58:34,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:34,642 INFO L276 IsEmpty]: Start isEmpty. Operand 25500 states and 81071 transitions. [2021-06-05 03:58:34,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:34,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:34,669 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:34,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable826,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:34,869 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:34,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:34,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1828792773, now seen corresponding path program 466 times [2021-06-05 03:58:34,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:34,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148262361] [2021-06-05 03:58:34,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:35,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:35,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148262361] [2021-06-05 03:58:35,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148262361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:35,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359536192] [2021-06-05 03:58:35,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:35,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:58:35,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:35,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:35,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:35,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359536192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:35,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:35,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-05 03:58:35,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534974077] [2021-06-05 03:58:35,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:35,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:35,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:35,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:35,199 INFO L87 Difference]: Start difference. First operand 25500 states and 81071 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:35,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:35,802 INFO L93 Difference]: Finished difference Result 25807 states and 81556 transitions. [2021-06-05 03:58:35,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:58:35,802 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:35,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:35,841 INFO L225 Difference]: With dead ends: 25807 [2021-06-05 03:58:35,841 INFO L226 Difference]: Without dead ends: 25800 [2021-06-05 03:58:35,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 365.3ms TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:58:35,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25800 states. [2021-06-05 03:58:36,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25800 to 25502. [2021-06-05 03:58:36,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25502 states, 25501 states have (on average 3.1792478726324456) internal successors, (81074), 25501 states have internal predecessors, (81074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:36,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25502 states to 25502 states and 81074 transitions. [2021-06-05 03:58:36,268 INFO L78 Accepts]: Start accepts. Automaton has 25502 states and 81074 transitions. Word has length 25 [2021-06-05 03:58:36,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:36,268 INFO L482 AbstractCegarLoop]: Abstraction has 25502 states and 81074 transitions. [2021-06-05 03:58:36,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:36,269 INFO L276 IsEmpty]: Start isEmpty. Operand 25502 states and 81074 transitions. [2021-06-05 03:58:36,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:36,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:36,299 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:36,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable829,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:36,500 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:36,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:36,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1821120793, now seen corresponding path program 467 times [2021-06-05 03:58:36,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:36,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468674090] [2021-06-05 03:58:36,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:36,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:36,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468674090] [2021-06-05 03:58:36,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468674090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:36,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614893783] [2021-06-05 03:58:36,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:36,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:58:36,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:36,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:36,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:36,878 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:36,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614893783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:36,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:36,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-06-05 03:58:36,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765483253] [2021-06-05 03:58:36,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:36,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:36,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:36,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:36,879 INFO L87 Difference]: Start difference. First operand 25502 states and 81074 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:37,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:37,322 INFO L93 Difference]: Finished difference Result 25654 states and 81322 transitions. [2021-06-05 03:58:37,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:58:37,322 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:37,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:37,357 INFO L225 Difference]: With dead ends: 25654 [2021-06-05 03:58:37,357 INFO L226 Difference]: Without dead ends: 25641 [2021-06-05 03:58:37,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 343.4ms TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:58:37,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25641 states. [2021-06-05 03:58:37,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25641 to 25457. [2021-06-05 03:58:37,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25457 states, 25456 states have (on average 3.179525455688246) internal successors, (80938), 25456 states have internal predecessors, (80938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:37,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25457 states to 25457 states and 80938 transitions. [2021-06-05 03:58:37,833 INFO L78 Accepts]: Start accepts. Automaton has 25457 states and 80938 transitions. Word has length 25 [2021-06-05 03:58:37,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:37,834 INFO L482 AbstractCegarLoop]: Abstraction has 25457 states and 80938 transitions. [2021-06-05 03:58:37,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:37,834 INFO L276 IsEmpty]: Start isEmpty. Operand 25457 states and 80938 transitions. [2021-06-05 03:58:37,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:37,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:37,862 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:38,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable832 [2021-06-05 03:58:38,063 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:38,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:38,063 INFO L82 PathProgramCache]: Analyzing trace with hash -505397377, now seen corresponding path program 468 times [2021-06-05 03:58:38,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:38,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788444327] [2021-06-05 03:58:38,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:38,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:38,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:38,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788444327] [2021-06-05 03:58:38,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788444327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:38,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818334637] [2021-06-05 03:58:38,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:38,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:58:38,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:38,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:38,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:38,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818334637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:38,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:38,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-06-05 03:58:38,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749642686] [2021-06-05 03:58:38,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:58:38,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:38,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:58:38,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:58:38,431 INFO L87 Difference]: Start difference. First operand 25457 states and 80938 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:38,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:38,880 INFO L93 Difference]: Finished difference Result 26445 states and 83499 transitions. [2021-06-05 03:58:38,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:58:38,880 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:38,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:38,919 INFO L225 Difference]: With dead ends: 26445 [2021-06-05 03:58:38,919 INFO L226 Difference]: Without dead ends: 26428 [2021-06-05 03:58:38,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 349.1ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:58:38,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26428 states. [2021-06-05 03:58:39,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26428 to 26047. [2021-06-05 03:58:39,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26047 states, 26046 states have (on average 3.1769177608845887) internal successors, (82746), 26046 states have internal predecessors, (82746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:39,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26047 states to 26047 states and 82746 transitions. [2021-06-05 03:58:39,336 INFO L78 Accepts]: Start accepts. Automaton has 26047 states and 82746 transitions. Word has length 25 [2021-06-05 03:58:39,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:39,336 INFO L482 AbstractCegarLoop]: Abstraction has 26047 states and 82746 transitions. [2021-06-05 03:58:39,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:39,336 INFO L276 IsEmpty]: Start isEmpty. Operand 26047 states and 82746 transitions. [2021-06-05 03:58:39,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:39,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:39,368 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:39,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable835,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:39,569 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:39,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:39,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1109305347, now seen corresponding path program 469 times [2021-06-05 03:58:39,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:39,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011008304] [2021-06-05 03:58:39,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:39,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:39,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011008304] [2021-06-05 03:58:39,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011008304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:39,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241869059] [2021-06-05 03:58:39,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:39,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:39,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:39,904 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:39,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241869059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:39,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:39,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-06-05 03:58:39,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570974695] [2021-06-05 03:58:39,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:58:39,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:39,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:58:39,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:58:39,905 INFO L87 Difference]: Start difference. First operand 26047 states and 82746 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:40,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:40,329 INFO L93 Difference]: Finished difference Result 26443 states and 83380 transitions. [2021-06-05 03:58:40,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:58:40,329 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:40,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:40,369 INFO L225 Difference]: With dead ends: 26443 [2021-06-05 03:58:40,369 INFO L226 Difference]: Without dead ends: 26427 [2021-06-05 03:58:40,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 326.1ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:58:40,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26427 states. [2021-06-05 03:58:40,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26427 to 26006. [2021-06-05 03:58:40,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26006 states, 26005 states have (on average 3.173658911747741) internal successors, (82531), 26005 states have internal predecessors, (82531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:40,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26006 states to 26006 states and 82531 transitions. [2021-06-05 03:58:40,789 INFO L78 Accepts]: Start accepts. Automaton has 26006 states and 82531 transitions. Word has length 25 [2021-06-05 03:58:40,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:40,789 INFO L482 AbstractCegarLoop]: Abstraction has 26006 states and 82531 transitions. [2021-06-05 03:58:40,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:40,789 INFO L276 IsEmpty]: Start isEmpty. Operand 26006 states and 82531 transitions. [2021-06-05 03:58:40,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:40,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:40,822 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:41,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable838,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:41,022 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:41,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:41,022 INFO L82 PathProgramCache]: Analyzing trace with hash -969988481, now seen corresponding path program 470 times [2021-06-05 03:58:41,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:41,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387780931] [2021-06-05 03:58:41,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:41,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:41,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:41,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387780931] [2021-06-05 03:58:41,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387780931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:41,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275538998] [2021-06-05 03:58:41,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:41,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:58:41,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:41,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:41,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:41,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275538998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:41,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:41,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 03:58:41,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817692467] [2021-06-05 03:58:41,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:41,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:41,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:41,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:41,363 INFO L87 Difference]: Start difference. First operand 26006 states and 82531 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:41,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:41,823 INFO L93 Difference]: Finished difference Result 26428 states and 83208 transitions. [2021-06-05 03:58:41,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:58:41,823 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:41,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:41,862 INFO L225 Difference]: With dead ends: 26428 [2021-06-05 03:58:41,862 INFO L226 Difference]: Without dead ends: 26410 [2021-06-05 03:58:41,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 328.5ms TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:58:41,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26410 states. [2021-06-05 03:58:42,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26410 to 25949. [2021-06-05 03:58:42,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25949 states, 25948 states have (on average 3.1697240635116386) internal successors, (82248), 25948 states have internal predecessors, (82248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:42,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25949 states to 25949 states and 82248 transitions. [2021-06-05 03:58:42,334 INFO L78 Accepts]: Start accepts. Automaton has 25949 states and 82248 transitions. Word has length 25 [2021-06-05 03:58:42,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:42,334 INFO L482 AbstractCegarLoop]: Abstraction has 25949 states and 82248 transitions. [2021-06-05 03:58:42,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:42,335 INFO L276 IsEmpty]: Start isEmpty. Operand 25949 states and 82248 transitions. [2021-06-05 03:58:42,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:42,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:42,368 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:42,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable841 [2021-06-05 03:58:42,569 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:42,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:42,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1003587709, now seen corresponding path program 471 times [2021-06-05 03:58:42,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:42,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12363790] [2021-06-05 03:58:42,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:42,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:42,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12363790] [2021-06-05 03:58:42,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12363790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:42,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101474078] [2021-06-05 03:58:42,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:42,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:58:42,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:42,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:42,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:42,923 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:42,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101474078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:42,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:42,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 03:58:42,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673361352] [2021-06-05 03:58:42,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:42,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:42,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:42,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:42,924 INFO L87 Difference]: Start difference. First operand 25949 states and 82248 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:43,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:43,432 INFO L93 Difference]: Finished difference Result 26398 states and 82966 transitions. [2021-06-05 03:58:43,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:58:43,432 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:43,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:43,474 INFO L225 Difference]: With dead ends: 26398 [2021-06-05 03:58:43,474 INFO L226 Difference]: Without dead ends: 26378 [2021-06-05 03:58:43,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 367.4ms TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:58:43,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26378 states. [2021-06-05 03:58:43,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26378 to 25877. [2021-06-05 03:58:43,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25877 states, 25876 states have (on average 3.166409027670428) internal successors, (81934), 25876 states have internal predecessors, (81934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:43,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25877 states to 25877 states and 81934 transitions. [2021-06-05 03:58:43,890 INFO L78 Accepts]: Start accepts. Automaton has 25877 states and 81934 transitions. Word has length 25 [2021-06-05 03:58:43,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:43,890 INFO L482 AbstractCegarLoop]: Abstraction has 25877 states and 81934 transitions. [2021-06-05 03:58:43,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:43,890 INFO L276 IsEmpty]: Start isEmpty. Operand 25877 states and 81934 transitions. [2021-06-05 03:58:43,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:43,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:43,923 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:44,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable844,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:44,123 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:44,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:44,124 INFO L82 PathProgramCache]: Analyzing trace with hash -2045163777, now seen corresponding path program 472 times [2021-06-05 03:58:44,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:44,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143856127] [2021-06-05 03:58:44,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:44,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:44,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143856127] [2021-06-05 03:58:44,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143856127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:44,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945495179] [2021-06-05 03:58:44,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:44,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:58:44,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:44,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:44,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:44,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945495179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:44,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:44,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 03:58:44,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669796043] [2021-06-05 03:58:44,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:44,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:44,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:44,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:44,449 INFO L87 Difference]: Start difference. First operand 25877 states and 81934 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:44,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:44,974 INFO L93 Difference]: Finished difference Result 26361 states and 82705 transitions. [2021-06-05 03:58:44,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:58:44,974 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:44,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:45,016 INFO L225 Difference]: With dead ends: 26361 [2021-06-05 03:58:45,016 INFO L226 Difference]: Without dead ends: 26339 [2021-06-05 03:58:45,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 359.5ms TimeCoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:58:45,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26339 states. [2021-06-05 03:58:45,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26339 to 25791. [2021-06-05 03:58:45,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25791 states, 25790 states have (on average 3.164831329972858) internal successors, (81621), 25790 states have internal predecessors, (81621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:45,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25791 states to 25791 states and 81621 transitions. [2021-06-05 03:58:45,471 INFO L78 Accepts]: Start accepts. Automaton has 25791 states and 81621 transitions. Word has length 25 [2021-06-05 03:58:45,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:45,471 INFO L482 AbstractCegarLoop]: Abstraction has 25791 states and 81621 transitions. [2021-06-05 03:58:45,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:45,471 INFO L276 IsEmpty]: Start isEmpty. Operand 25791 states and 81621 transitions. [2021-06-05 03:58:45,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:45,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:45,505 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:45,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable847,476 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:45,706 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:45,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:45,706 INFO L82 PathProgramCache]: Analyzing trace with hash 25716483, now seen corresponding path program 473 times [2021-06-05 03:58:45,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:45,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774108176] [2021-06-05 03:58:45,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:45,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:45,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:45,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774108176] [2021-06-05 03:58:45,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774108176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:45,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624467665] [2021-06-05 03:58:45,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:45,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:58:45,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:45,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:45,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:46,033 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:46,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624467665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:46,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:46,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 03:58:46,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378726387] [2021-06-05 03:58:46,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:46,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:46,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:46,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:46,033 INFO L87 Difference]: Start difference. First operand 25791 states and 81621 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:46,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:46,610 INFO L93 Difference]: Finished difference Result 26316 states and 82452 transitions. [2021-06-05 03:58:46,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 03:58:46,611 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:46,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:46,732 INFO L225 Difference]: With dead ends: 26316 [2021-06-05 03:58:46,733 INFO L226 Difference]: Without dead ends: 26292 [2021-06-05 03:58:46,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 374.1ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-06-05 03:58:46,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26292 states. [2021-06-05 03:58:47,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26292 to 25713. [2021-06-05 03:58:47,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25713 states, 25712 states have (on average 3.164281269446173) internal successors, (81360), 25712 states have internal predecessors, (81360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:47,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25713 states to 25713 states and 81360 transitions. [2021-06-05 03:58:47,148 INFO L78 Accepts]: Start accepts. Automaton has 25713 states and 81360 transitions. Word has length 25 [2021-06-05 03:58:47,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:47,148 INFO L482 AbstractCegarLoop]: Abstraction has 25713 states and 81360 transitions. [2021-06-05 03:58:47,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:47,148 INFO L276 IsEmpty]: Start isEmpty. Operand 25713 states and 81360 transitions. [2021-06-05 03:58:47,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:47,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:47,182 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:47,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable850 [2021-06-05 03:58:47,383 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:47,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:47,383 INFO L82 PathProgramCache]: Analyzing trace with hash -201504897, now seen corresponding path program 474 times [2021-06-05 03:58:47,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:47,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978626704] [2021-06-05 03:58:47,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:47,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:47,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978626704] [2021-06-05 03:58:47,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978626704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:47,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738924767] [2021-06-05 03:58:47,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:47,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:58:47,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:47,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:47,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:47,730 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:47,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738924767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:47,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:47,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 03:58:47,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63983324] [2021-06-05 03:58:47,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:47,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:47,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:47,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:47,730 INFO L87 Difference]: Start difference. First operand 25713 states and 81360 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:48,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:48,334 INFO L93 Difference]: Finished difference Result 26083 states and 81944 transitions. [2021-06-05 03:58:48,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 03:58:48,334 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:48,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:48,377 INFO L225 Difference]: With dead ends: 26083 [2021-06-05 03:58:48,377 INFO L226 Difference]: Without dead ends: 26057 [2021-06-05 03:58:48,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 406.2ms TimeCoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-06-05 03:58:48,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26057 states. [2021-06-05 03:58:48,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26057 to 25637. [2021-06-05 03:58:48,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25637 states, 25636 states have (on average 3.1651973786862224) internal successors, (81143), 25636 states have internal predecessors, (81143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:48,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25637 states to 25637 states and 81143 transitions. [2021-06-05 03:58:48,830 INFO L78 Accepts]: Start accepts. Automaton has 25637 states and 81143 transitions. Word has length 25 [2021-06-05 03:58:48,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:48,830 INFO L482 AbstractCegarLoop]: Abstraction has 25637 states and 81143 transitions. [2021-06-05 03:58:48,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:48,830 INFO L276 IsEmpty]: Start isEmpty. Operand 25637 states and 81143 transitions. [2021-06-05 03:58:48,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:48,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:48,865 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:49,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable853 [2021-06-05 03:58:49,066 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:49,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:49,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1344566915, now seen corresponding path program 475 times [2021-06-05 03:58:49,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:49,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410801846] [2021-06-05 03:58:49,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:49,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:49,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410801846] [2021-06-05 03:58:49,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410801846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:49,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136805644] [2021-06-05 03:58:49,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:49,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:49,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:49,422 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:49,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136805644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:49,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:49,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 03:58:49,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173470364] [2021-06-05 03:58:49,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:49,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:49,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:49,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:49,423 INFO L87 Difference]: Start difference. First operand 25637 states and 81143 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:49,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:49,998 INFO L93 Difference]: Finished difference Result 25903 states and 81553 transitions. [2021-06-05 03:58:49,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 03:58:49,998 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:49,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:50,035 INFO L225 Difference]: With dead ends: 25903 [2021-06-05 03:58:50,036 INFO L226 Difference]: Without dead ends: 25896 [2021-06-05 03:58:50,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 379.8ms TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-06-05 03:58:50,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25896 states. [2021-06-05 03:58:50,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25896 to 25651. [2021-06-05 03:58:50,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25651 states, 25650 states have (on average 3.164288499025341) internal successors, (81164), 25650 states have internal predecessors, (81164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:50,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25651 states to 25651 states and 81164 transitions. [2021-06-05 03:58:50,440 INFO L78 Accepts]: Start accepts. Automaton has 25651 states and 81164 transitions. Word has length 25 [2021-06-05 03:58:50,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:50,440 INFO L482 AbstractCegarLoop]: Abstraction has 25651 states and 81164 transitions. [2021-06-05 03:58:50,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:50,440 INFO L276 IsEmpty]: Start isEmpty. Operand 25651 states and 81164 transitions. [2021-06-05 03:58:50,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:50,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:50,474 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:50,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable856,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:50,675 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:50,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:50,675 INFO L82 PathProgramCache]: Analyzing trace with hash -880520577, now seen corresponding path program 476 times [2021-06-05 03:58:50,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:50,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552962401] [2021-06-05 03:58:50,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:50,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:50,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:50,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552962401] [2021-06-05 03:58:50,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552962401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:50,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383880769] [2021-06-05 03:58:50,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:50,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:58:50,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:50,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:50,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:51,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383880769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:51,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:51,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 23 [2021-06-05 03:58:51,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832826042] [2021-06-05 03:58:51,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:58:51,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:51,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:58:51,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:58:51,040 INFO L87 Difference]: Start difference. First operand 25651 states and 81164 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:51,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:51,437 INFO L93 Difference]: Finished difference Result 26339 states and 82876 transitions. [2021-06-05 03:58:51,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:58:51,438 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:51,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:51,469 INFO L225 Difference]: With dead ends: 26339 [2021-06-05 03:58:51,470 INFO L226 Difference]: Without dead ends: 26329 [2021-06-05 03:58:51,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 335.6ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:58:51,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26329 states. [2021-06-05 03:58:51,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26329 to 25789. [2021-06-05 03:58:51,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25789 states, 25788 states have (on average 3.167248332557779) internal successors, (81677), 25788 states have internal predecessors, (81677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:51,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25789 states to 25789 states and 81677 transitions. [2021-06-05 03:58:51,867 INFO L78 Accepts]: Start accepts. Automaton has 25789 states and 81677 transitions. Word has length 25 [2021-06-05 03:58:51,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:51,867 INFO L482 AbstractCegarLoop]: Abstraction has 25789 states and 81677 transitions. [2021-06-05 03:58:51,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:51,867 INFO L276 IsEmpty]: Start isEmpty. Operand 25789 states and 81677 transitions. [2021-06-05 03:58:51,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:51,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:51,900 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:52,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable859 [2021-06-05 03:58:52,101 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:52,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:52,101 INFO L82 PathProgramCache]: Analyzing trace with hash 734182147, now seen corresponding path program 477 times [2021-06-05 03:58:52,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:52,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558616343] [2021-06-05 03:58:52,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:52,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:52,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558616343] [2021-06-05 03:58:52,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558616343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:52,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859257164] [2021-06-05 03:58:52,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:52,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 03:58:52,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:52,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:52,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:52,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859257164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:52,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:52,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 23 [2021-06-05 03:58:52,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518994322] [2021-06-05 03:58:52,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:58:52,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:52,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:58:52,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:58:52,557 INFO L87 Difference]: Start difference. First operand 25789 states and 81677 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:52,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:52,895 INFO L93 Difference]: Finished difference Result 26321 states and 82830 transitions. [2021-06-05 03:58:52,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:58:52,895 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:52,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:52,934 INFO L225 Difference]: With dead ends: 26321 [2021-06-05 03:58:52,934 INFO L226 Difference]: Without dead ends: 26314 [2021-06-05 03:58:52,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 382.9ms TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:58:52,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26314 states. [2021-06-05 03:58:53,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26314 to 25787. [2021-06-05 03:58:53,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25787 states, 25786 states have (on average 3.1671837431164196) internal successors, (81669), 25786 states have internal predecessors, (81669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:53,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25787 states to 25787 states and 81669 transitions. [2021-06-05 03:58:53,348 INFO L78 Accepts]: Start accepts. Automaton has 25787 states and 81669 transitions. Word has length 25 [2021-06-05 03:58:53,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:53,348 INFO L482 AbstractCegarLoop]: Abstraction has 25787 states and 81669 transitions. [2021-06-05 03:58:53,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:53,349 INFO L276 IsEmpty]: Start isEmpty. Operand 25787 states and 81669 transitions. [2021-06-05 03:58:53,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:53,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:53,381 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:53,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 481 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable862 [2021-06-05 03:58:53,581 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:53,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:53,581 INFO L82 PathProgramCache]: Analyzing trace with hash -309065771, now seen corresponding path program 478 times [2021-06-05 03:58:53,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:53,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899993178] [2021-06-05 03:58:53,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:53,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:53,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899993178] [2021-06-05 03:58:53,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899993178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:53,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164971245] [2021-06-05 03:58:53,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:53,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:58:53,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:53,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:53,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:53,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164971245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:53,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:53,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-06-05 03:58:53,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781810526] [2021-06-05 03:58:53,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:53,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:53,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:53,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:53,980 INFO L87 Difference]: Start difference. First operand 25787 states and 81669 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:54,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:54,323 INFO L93 Difference]: Finished difference Result 26101 states and 82243 transitions. [2021-06-05 03:58:54,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:58:54,323 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:54,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:54,361 INFO L225 Difference]: With dead ends: 26101 [2021-06-05 03:58:54,361 INFO L226 Difference]: Without dead ends: 26094 [2021-06-05 03:58:54,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 358.1ms TimeCoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:58:54,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26094 states. [2021-06-05 03:58:54,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26094 to 25786. [2021-06-05 03:58:54,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25786 states, 25785 states have (on average 3.1671902268760905) internal successors, (81666), 25785 states have internal predecessors, (81666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:54,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25786 states to 25786 states and 81666 transitions. [2021-06-05 03:58:54,786 INFO L78 Accepts]: Start accepts. Automaton has 25786 states and 81666 transitions. Word has length 25 [2021-06-05 03:58:54,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:54,786 INFO L482 AbstractCegarLoop]: Abstraction has 25786 states and 81666 transitions. [2021-06-05 03:58:54,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:54,786 INFO L276 IsEmpty]: Start isEmpty. Operand 25786 states and 81666 transitions. [2021-06-05 03:58:54,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:54,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:54,818 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:55,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable865 [2021-06-05 03:58:55,019 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:55,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:55,019 INFO L82 PathProgramCache]: Analyzing trace with hash 375562111, now seen corresponding path program 479 times [2021-06-05 03:58:55,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:55,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870074017] [2021-06-05 03:58:55,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:55,174 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:55,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:55,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870074017] [2021-06-05 03:58:55,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870074017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:55,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148589561] [2021-06-05 03:58:55,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:55,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 03:58:55,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:55,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:55,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:55,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148589561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:55,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:55,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2021-06-05 03:58:55,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967229660] [2021-06-05 03:58:55,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:58:55,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:55,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:58:55,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:58:55,392 INFO L87 Difference]: Start difference. First operand 25786 states and 81666 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:55,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:55,737 INFO L93 Difference]: Finished difference Result 26623 states and 83970 transitions. [2021-06-05 03:58:55,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:58:55,737 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:55,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:55,777 INFO L225 Difference]: With dead ends: 26623 [2021-06-05 03:58:55,777 INFO L226 Difference]: Without dead ends: 26613 [2021-06-05 03:58:55,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 340.2ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:58:55,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26613 states. [2021-06-05 03:58:56,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26613 to 26000. [2021-06-05 03:58:56,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26000 states, 25999 states have (on average 3.1711219662294705) internal successors, (82446), 25999 states have internal predecessors, (82446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:56,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26000 states to 26000 states and 82446 transitions. [2021-06-05 03:58:56,268 INFO L78 Accepts]: Start accepts. Automaton has 26000 states and 82446 transitions. Word has length 25 [2021-06-05 03:58:56,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:56,268 INFO L482 AbstractCegarLoop]: Abstraction has 26000 states and 82446 transitions. [2021-06-05 03:58:56,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:56,268 INFO L276 IsEmpty]: Start isEmpty. Operand 26000 states and 82446 transitions. [2021-06-05 03:58:56,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:56,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:56,303 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:56,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable868,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:56,503 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:56,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:56,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1990264835, now seen corresponding path program 480 times [2021-06-05 03:58:56,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:56,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65082601] [2021-06-05 03:58:56,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:56,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:56,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65082601] [2021-06-05 03:58:56,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65082601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:56,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404256957] [2021-06-05 03:58:56,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:56,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 03:58:56,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:56,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:56,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:56,881 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:56,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404256957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:56,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:56,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2021-06-05 03:58:56,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010563751] [2021-06-05 03:58:56,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:58:56,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:56,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:58:56,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:58:56,882 INFO L87 Difference]: Start difference. First operand 26000 states and 82446 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:57,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:57,250 INFO L93 Difference]: Finished difference Result 26604 states and 83911 transitions. [2021-06-05 03:58:57,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:58:57,250 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:57,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:57,292 INFO L225 Difference]: With dead ends: 26604 [2021-06-05 03:58:57,292 INFO L226 Difference]: Without dead ends: 26597 [2021-06-05 03:58:57,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 349.8ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:58:57,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26597 states. [2021-06-05 03:58:57,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26597 to 25997. [2021-06-05 03:58:57,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25997 states, 25996 states have (on average 3.1710263117402677) internal successors, (82434), 25996 states have internal predecessors, (82434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:57,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25997 states to 25997 states and 82434 transitions. [2021-06-05 03:58:57,721 INFO L78 Accepts]: Start accepts. Automaton has 25997 states and 82434 transitions. Word has length 25 [2021-06-05 03:58:57,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:57,721 INFO L482 AbstractCegarLoop]: Abstraction has 25997 states and 82434 transitions. [2021-06-05 03:58:57,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:57,721 INFO L276 IsEmpty]: Start isEmpty. Operand 25997 states and 82434 transitions. [2021-06-05 03:58:57,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:57,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:57,754 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:57,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable871 [2021-06-05 03:58:57,954 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:57,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:57,955 INFO L82 PathProgramCache]: Analyzing trace with hash 947016917, now seen corresponding path program 481 times [2021-06-05 03:58:57,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:57,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519861523] [2021-06-05 03:58:57,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:58,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:58,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519861523] [2021-06-05 03:58:58,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519861523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:58,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440027418] [2021-06-05 03:58:58,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:58,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:58,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:58,312 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:58,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440027418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:58,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:58,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-06-05 03:58:58,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971459521] [2021-06-05 03:58:58,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:58,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:58,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:58,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:58,313 INFO L87 Difference]: Start difference. First operand 25997 states and 82434 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:58,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:58,697 INFO L93 Difference]: Finished difference Result 26449 states and 83488 transitions. [2021-06-05 03:58:58,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:58:58,697 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:58:58,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:58,736 INFO L225 Difference]: With dead ends: 26449 [2021-06-05 03:58:58,736 INFO L226 Difference]: Without dead ends: 26436 [2021-06-05 03:58:58,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 338.5ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:58:58,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26436 states. [2021-06-05 03:58:59,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26436 to 26004. [2021-06-05 03:58:59,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26004 states, 26003 states have (on average 3.1706341575972004) internal successors, (82446), 26003 states have internal predecessors, (82446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:59,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26004 states to 26004 states and 82446 transitions. [2021-06-05 03:58:59,150 INFO L78 Accepts]: Start accepts. Automaton has 26004 states and 82446 transitions. Word has length 25 [2021-06-05 03:58:59,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:59,150 INFO L482 AbstractCegarLoop]: Abstraction has 26004 states and 82446 transitions. [2021-06-05 03:58:59,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:59,150 INFO L276 IsEmpty]: Start isEmpty. Operand 26004 states and 82446 transitions. [2021-06-05 03:58:59,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:58:59,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:59,184 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:59,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable874,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:59,385 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:59,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:59,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1482246719, now seen corresponding path program 482 times [2021-06-05 03:58:59,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:59,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479443149] [2021-06-05 03:58:59,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:59,528 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:59,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:59,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479443149] [2021-06-05 03:58:59,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479443149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:59,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619996415] [2021-06-05 03:58:59,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:59,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:58:59,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:59,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:58:59,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:59,753 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:59,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619996415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:59,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:59,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-06-05 03:58:59,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439732137] [2021-06-05 03:58:59,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:58:59,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:59,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:58:59,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:58:59,754 INFO L87 Difference]: Start difference. First operand 26004 states and 82446 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:00,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:00,134 INFO L93 Difference]: Finished difference Result 26271 states and 82944 transitions. [2021-06-05 03:59:00,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:59:00,134 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:00,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:00,173 INFO L225 Difference]: With dead ends: 26271 [2021-06-05 03:59:00,173 INFO L226 Difference]: Without dead ends: 26264 [2021-06-05 03:59:00,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 349.8ms TimeCoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:59:00,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26264 states. [2021-06-05 03:59:00,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26264 to 26002. [2021-06-05 03:59:00,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26002 states, 26001 states have (on average 3.1706472827968155) internal successors, (82440), 26001 states have internal predecessors, (82440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:00,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26002 states to 26002 states and 82440 transitions. [2021-06-05 03:59:00,652 INFO L78 Accepts]: Start accepts. Automaton has 26002 states and 82440 transitions. Word has length 25 [2021-06-05 03:59:00,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:00,652 INFO L482 AbstractCegarLoop]: Abstraction has 26002 states and 82440 transitions. [2021-06-05 03:59:00,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:00,652 INFO L276 IsEmpty]: Start isEmpty. Operand 26002 states and 82440 transitions. [2021-06-05 03:59:00,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:00,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:00,685 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:00,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable877 [2021-06-05 03:59:00,885 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:00,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:00,886 INFO L82 PathProgramCache]: Analyzing trace with hash 880306103, now seen corresponding path program 483 times [2021-06-05 03:59:00,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:00,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654094029] [2021-06-05 03:59:00,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:01,030 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:01,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:01,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654094029] [2021-06-05 03:59:01,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654094029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:01,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712582810] [2021-06-05 03:59:01,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:01,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 03:59:01,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:01,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:59:01,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:01,253 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:01,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712582810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:01,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:01,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-06-05 03:59:01,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512851433] [2021-06-05 03:59:01,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:59:01,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:01,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:59:01,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:59:01,254 INFO L87 Difference]: Start difference. First operand 26002 states and 82440 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:01,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:01,612 INFO L93 Difference]: Finished difference Result 26167 states and 82719 transitions. [2021-06-05 03:59:01,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:01,612 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:01,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:01,651 INFO L225 Difference]: With dead ends: 26167 [2021-06-05 03:59:01,651 INFO L226 Difference]: Without dead ends: 26151 [2021-06-05 03:59:01,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 350.2ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:59:01,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26151 states. [2021-06-05 03:59:01,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26151 to 25962. [2021-06-05 03:59:02,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25962 states, 25961 states have (on average 3.170910211471053) internal successors, (82320), 25961 states have internal predecessors, (82320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:02,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25962 states to 25962 states and 82320 transitions. [2021-06-05 03:59:02,066 INFO L78 Accepts]: Start accepts. Automaton has 25962 states and 82320 transitions. Word has length 25 [2021-06-05 03:59:02,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:02,066 INFO L482 AbstractCegarLoop]: Abstraction has 25962 states and 82320 transitions. [2021-06-05 03:59:02,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:02,067 INFO L276 IsEmpty]: Start isEmpty. Operand 25962 states and 82320 transitions. [2021-06-05 03:59:02,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:02,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:02,100 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:02,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:02,301 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:02,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:02,301 INFO L82 PathProgramCache]: Analyzing trace with hash 659419775, now seen corresponding path program 484 times [2021-06-05 03:59:02,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:02,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984674529] [2021-06-05 03:59:02,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:02,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:02,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984674529] [2021-06-05 03:59:02,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984674529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:02,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978485497] [2021-06-05 03:59:02,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:02,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:02,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:02,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:59:02,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:02,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978485497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:02,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:02,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 23 [2021-06-05 03:59:02,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579666872] [2021-06-05 03:59:02,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:59:02,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:02,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:59:02,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:59:02,671 INFO L87 Difference]: Start difference. First operand 25962 states and 82320 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:03,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:03,023 INFO L93 Difference]: Finished difference Result 26771 states and 84501 transitions. [2021-06-05 03:59:03,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:59:03,023 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:03,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:03,068 INFO L225 Difference]: With dead ends: 26771 [2021-06-05 03:59:03,068 INFO L226 Difference]: Without dead ends: 26761 [2021-06-05 03:59:03,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 338.6ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:59:03,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26761 states. [2021-06-05 03:59:03,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26761 to 26195. [2021-06-05 03:59:03,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26195 states, 26194 states have (on average 3.1746964953806214) internal successors, (83158), 26194 states have internal predecessors, (83158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:03,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26195 states to 26195 states and 83158 transitions. [2021-06-05 03:59:03,543 INFO L78 Accepts]: Start accepts. Automaton has 26195 states and 83158 transitions. Word has length 25 [2021-06-05 03:59:03,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:03,543 INFO L482 AbstractCegarLoop]: Abstraction has 26195 states and 83158 transitions. [2021-06-05 03:59:03,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:03,543 INFO L276 IsEmpty]: Start isEmpty. Operand 26195 states and 83158 transitions. [2021-06-05 03:59:03,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:03,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:03,578 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:03,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable883 [2021-06-05 03:59:03,778 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:03,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:03,779 INFO L82 PathProgramCache]: Analyzing trace with hash -2020844797, now seen corresponding path program 485 times [2021-06-05 03:59:03,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:03,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161479019] [2021-06-05 03:59:03,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:03,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:03,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161479019] [2021-06-05 03:59:03,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161479019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:03,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291488673] [2021-06-05 03:59:03,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:03,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 03:59:03,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:03,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:59:03,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:04,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291488673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:04,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:04,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 23 [2021-06-05 03:59:04,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340280876] [2021-06-05 03:59:04,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:59:04,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:04,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:59:04,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:59:04,142 INFO L87 Difference]: Start difference. First operand 26195 states and 83158 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:04,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:04,492 INFO L93 Difference]: Finished difference Result 26752 states and 84431 transitions. [2021-06-05 03:59:04,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:59:04,492 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:04,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:04,537 INFO L225 Difference]: With dead ends: 26752 [2021-06-05 03:59:04,538 INFO L226 Difference]: Without dead ends: 26745 [2021-06-05 03:59:04,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 331.3ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:59:04,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26745 states. [2021-06-05 03:59:04,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26745 to 26191. [2021-06-05 03:59:05,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26191 states, 26190 states have (on average 3.174570446735395) internal successors, (83142), 26190 states have internal predecessors, (83142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:05,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26191 states to 26191 states and 83142 transitions. [2021-06-05 03:59:05,072 INFO L78 Accepts]: Start accepts. Automaton has 26191 states and 83142 transitions. Word has length 25 [2021-06-05 03:59:05,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:05,072 INFO L482 AbstractCegarLoop]: Abstraction has 26191 states and 83142 transitions. [2021-06-05 03:59:05,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:05,072 INFO L276 IsEmpty]: Start isEmpty. Operand 26191 states and 83142 transitions. [2021-06-05 03:59:05,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:05,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:05,108 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:05,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable886,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:05,308 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:05,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:05,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1230874581, now seen corresponding path program 486 times [2021-06-05 03:59:05,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:05,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948141217] [2021-06-05 03:59:05,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:05,449 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:05,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:05,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948141217] [2021-06-05 03:59:05,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948141217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:05,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52766536] [2021-06-05 03:59:05,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:05,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 03:59:05,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:05,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:59:05,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:05,668 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:05,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52766536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:05,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:05,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-06-05 03:59:05,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503743891] [2021-06-05 03:59:05,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:59:05,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:05,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:59:05,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:59:05,669 INFO L87 Difference]: Start difference. First operand 26191 states and 83142 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:06,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:06,041 INFO L93 Difference]: Finished difference Result 26690 states and 84238 transitions. [2021-06-05 03:59:06,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:59:06,041 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:06,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:06,085 INFO L225 Difference]: With dead ends: 26690 [2021-06-05 03:59:06,085 INFO L226 Difference]: Without dead ends: 26677 [2021-06-05 03:59:06,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 338.6ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:59:06,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26677 states. [2021-06-05 03:59:06,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26677 to 26188. [2021-06-05 03:59:06,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26188 states, 26187 states have (on average 3.1743613243212283) internal successors, (83127), 26187 states have internal predecessors, (83127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:06,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26188 states to 26188 states and 83127 transitions. [2021-06-05 03:59:06,516 INFO L78 Accepts]: Start accepts. Automaton has 26188 states and 83127 transitions. Word has length 25 [2021-06-05 03:59:06,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:06,516 INFO L482 AbstractCegarLoop]: Abstraction has 26188 states and 83127 transitions. [2021-06-05 03:59:06,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:06,516 INFO L276 IsEmpty]: Start isEmpty. Operand 26188 states and 83127 transitions. [2021-06-05 03:59:06,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:06,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:06,550 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:06,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable889 [2021-06-05 03:59:06,750 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:06,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:06,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1766104383, now seen corresponding path program 487 times [2021-06-05 03:59:06,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:06,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626790948] [2021-06-05 03:59:06,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:06,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:06,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626790948] [2021-06-05 03:59:06,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626790948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:06,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965399020] [2021-06-05 03:59:06,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:06,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:59:06,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:07,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965399020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:07,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:07,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-06-05 03:59:07,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024035947] [2021-06-05 03:59:07,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:59:07,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:07,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:59:07,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:59:07,132 INFO L87 Difference]: Start difference. First operand 26188 states and 83127 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:07,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:07,533 INFO L93 Difference]: Finished difference Result 26573 states and 83882 transitions. [2021-06-05 03:59:07,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:59:07,533 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:07,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:07,573 INFO L225 Difference]: With dead ends: 26573 [2021-06-05 03:59:07,573 INFO L226 Difference]: Without dead ends: 26557 [2021-06-05 03:59:07,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 369.0ms TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:59:07,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26557 states. [2021-06-05 03:59:07,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26557 to 26197. [2021-06-05 03:59:07,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26197 states, 26196 states have (on average 3.1737288135593222) internal successors, (83139), 26196 states have internal predecessors, (83139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:07,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26197 states to 26197 states and 83139 transitions. [2021-06-05 03:59:07,994 INFO L78 Accepts]: Start accepts. Automaton has 26197 states and 83139 transitions. Word has length 25 [2021-06-05 03:59:07,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:07,994 INFO L482 AbstractCegarLoop]: Abstraction has 26197 states and 83139 transitions. [2021-06-05 03:59:07,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:07,994 INFO L276 IsEmpty]: Start isEmpty. Operand 26197 states and 83139 transitions. [2021-06-05 03:59:08,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:08,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:08,029 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:08,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable892,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:08,229 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:08,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:08,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1178359061, now seen corresponding path program 488 times [2021-06-05 03:59:08,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:08,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477884295] [2021-06-05 03:59:08,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:08,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:08,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477884295] [2021-06-05 03:59:08,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477884295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:08,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704528785] [2021-06-05 03:59:08,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:08,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:59:08,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:08,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:59:08,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:08,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704528785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:08,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:08,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-06-05 03:59:08,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280750960] [2021-06-05 03:59:08,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:59:08,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:08,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:59:08,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:59:08,564 INFO L87 Difference]: Start difference. First operand 26197 states and 83139 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:08,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:08,958 INFO L93 Difference]: Finished difference Result 26468 states and 83627 transitions. [2021-06-05 03:59:08,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:59:08,959 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:08,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:08,998 INFO L225 Difference]: With dead ends: 26468 [2021-06-05 03:59:08,999 INFO L226 Difference]: Without dead ends: 26461 [2021-06-05 03:59:08,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 333.9ms TimeCoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:59:09,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26461 states. [2021-06-05 03:59:09,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26461 to 26194. [2021-06-05 03:59:09,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26194 states, 26193 states have (on average 3.1737487114878022) internal successors, (83130), 26193 states have internal predecessors, (83130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:09,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26194 states to 26194 states and 83130 transitions. [2021-06-05 03:59:09,497 INFO L78 Accepts]: Start accepts. Automaton has 26194 states and 83130 transitions. Word has length 25 [2021-06-05 03:59:09,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:09,497 INFO L482 AbstractCegarLoop]: Abstraction has 26194 states and 83130 transitions. [2021-06-05 03:59:09,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:09,497 INFO L276 IsEmpty]: Start isEmpty. Operand 26194 states and 83130 transitions. [2021-06-05 03:59:09,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:09,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:09,529 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:09,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable895 [2021-06-05 03:59:09,730 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:09,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:09,730 INFO L82 PathProgramCache]: Analyzing trace with hash -599983809, now seen corresponding path program 489 times [2021-06-05 03:59:09,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:09,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98000647] [2021-06-05 03:59:09,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:09,874 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:09,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:09,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98000647] [2021-06-05 03:59:09,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98000647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:09,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794381342] [2021-06-05 03:59:09,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:09,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 03:59:09,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:09,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:59:09,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:10,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794381342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:10,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:10,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-06-05 03:59:10,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375308301] [2021-06-05 03:59:10,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:59:10,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:10,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:59:10,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:59:10,088 INFO L87 Difference]: Start difference. First operand 26194 states and 83130 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:10,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:10,413 INFO L93 Difference]: Finished difference Result 26478 states and 83625 transitions. [2021-06-05 03:59:10,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:10,413 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:10,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:10,453 INFO L225 Difference]: With dead ends: 26478 [2021-06-05 03:59:10,453 INFO L226 Difference]: Without dead ends: 26462 [2021-06-05 03:59:10,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 335.5ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:59:10,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26462 states. [2021-06-05 03:59:10,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26462 to 26156. [2021-06-05 03:59:10,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26156 states, 26155 states have (on average 3.172968839610017) internal successors, (82989), 26155 states have internal predecessors, (82989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:10,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26156 states to 26156 states and 82989 transitions. [2021-06-05 03:59:10,863 INFO L78 Accepts]: Start accepts. Automaton has 26156 states and 82989 transitions. Word has length 25 [2021-06-05 03:59:10,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:10,863 INFO L482 AbstractCegarLoop]: Abstraction has 26156 states and 82989 transitions. [2021-06-05 03:59:10,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:10,863 INFO L276 IsEmpty]: Start isEmpty. Operand 26156 states and 82989 transitions. [2021-06-05 03:59:10,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:10,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:10,896 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:11,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable898,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:11,097 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:11,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:11,097 INFO L82 PathProgramCache]: Analyzing trace with hash -301930851, now seen corresponding path program 490 times [2021-06-05 03:59:11,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:11,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407892915] [2021-06-05 03:59:11,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:11,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:11,242 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:11,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:11,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407892915] [2021-06-05 03:59:11,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407892915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:11,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753561024] [2021-06-05 03:59:11,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:11,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:11,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:11,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:59:11,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:11,442 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:11,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753561024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:11,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:11,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-06-05 03:59:11,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495834635] [2021-06-05 03:59:11,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:59:11,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:11,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:59:11,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:59:11,443 INFO L87 Difference]: Start difference. First operand 26156 states and 82989 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:11,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:11,801 INFO L93 Difference]: Finished difference Result 26350 states and 83325 transitions. [2021-06-05 03:59:11,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:59:11,801 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:11,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:11,839 INFO L225 Difference]: With dead ends: 26350 [2021-06-05 03:59:11,839 INFO L226 Difference]: Without dead ends: 26331 [2021-06-05 03:59:11,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 345.1ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:59:11,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26331 states. [2021-06-05 03:59:12,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26331 to 26122. [2021-06-05 03:59:12,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26122 states, 26121 states have (on average 3.173193981853681) internal successors, (82887), 26121 states have internal predecessors, (82887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:12,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26122 states to 26122 states and 82887 transitions. [2021-06-05 03:59:12,256 INFO L78 Accepts]: Start accepts. Automaton has 26122 states and 82887 transitions. Word has length 25 [2021-06-05 03:59:12,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:12,256 INFO L482 AbstractCegarLoop]: Abstraction has 26122 states and 82887 transitions. [2021-06-05 03:59:12,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:12,256 INFO L276 IsEmpty]: Start isEmpty. Operand 26122 states and 82887 transitions. [2021-06-05 03:59:12,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:12,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:12,290 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:12,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable901,494 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:12,490 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:12,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:12,490 INFO L82 PathProgramCache]: Analyzing trace with hash 869072767, now seen corresponding path program 491 times [2021-06-05 03:59:12,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:12,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277096272] [2021-06-05 03:59:12,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:12,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:12,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:12,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277096272] [2021-06-05 03:59:12,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277096272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:12,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891515499] [2021-06-05 03:59:12,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:12,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 03:59:12,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:12,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:59:12,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:12,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891515499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:12,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:12,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-06-05 03:59:12,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154807493] [2021-06-05 03:59:12,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:59:12,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:12,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:59:12,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:59:12,834 INFO L87 Difference]: Start difference. First operand 26122 states and 82887 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:13,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:13,209 INFO L93 Difference]: Finished difference Result 26878 states and 84798 transitions. [2021-06-05 03:59:13,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:59:13,209 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:13,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:13,249 INFO L225 Difference]: With dead ends: 26878 [2021-06-05 03:59:13,249 INFO L226 Difference]: Without dead ends: 26868 [2021-06-05 03:59:13,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 313.1ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:59:13,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26868 states. [2021-06-05 03:59:13,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26868 to 26338. [2021-06-05 03:59:13,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26338 states, 26337 states have (on average 3.1761780005315714) internal successors, (83651), 26337 states have internal predecessors, (83651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:13,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26338 states to 26338 states and 83651 transitions. [2021-06-05 03:59:13,823 INFO L78 Accepts]: Start accepts. Automaton has 26338 states and 83651 transitions. Word has length 25 [2021-06-05 03:59:13,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:13,823 INFO L482 AbstractCegarLoop]: Abstraction has 26338 states and 83651 transitions. [2021-06-05 03:59:13,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:13,824 INFO L276 IsEmpty]: Start isEmpty. Operand 26338 states and 83651 transitions. [2021-06-05 03:59:13,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:13,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:13,856 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:14,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable904,495 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:14,056 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:14,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:14,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1811191805, now seen corresponding path program 492 times [2021-06-05 03:59:14,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:14,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465493171] [2021-06-05 03:59:14,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:14,204 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:14,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:14,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465493171] [2021-06-05 03:59:14,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465493171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:14,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079947866] [2021-06-05 03:59:14,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:14,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 03:59:14,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:14,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:59:14,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:14,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079947866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:14,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:14,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-06-05 03:59:14,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787656456] [2021-06-05 03:59:14,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:59:14,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:14,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:59:14,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:59:14,403 INFO L87 Difference]: Start difference. First operand 26338 states and 83651 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:14,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:14,771 INFO L93 Difference]: Finished difference Result 26859 states and 84730 transitions. [2021-06-05 03:59:14,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:59:14,772 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:14,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:14,811 INFO L225 Difference]: With dead ends: 26859 [2021-06-05 03:59:14,811 INFO L226 Difference]: Without dead ends: 26852 [2021-06-05 03:59:14,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 315.7ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:59:14,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26852 states. [2021-06-05 03:59:15,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26852 to 26333. [2021-06-05 03:59:15,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26333 states, 26332 states have (on average 3.1760215707124413) internal successors, (83631), 26332 states have internal predecessors, (83631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:15,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26333 states to 26333 states and 83631 transitions. [2021-06-05 03:59:15,245 INFO L78 Accepts]: Start accepts. Automaton has 26333 states and 83631 transitions. Word has length 25 [2021-06-05 03:59:15,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:15,245 INFO L482 AbstractCegarLoop]: Abstraction has 26333 states and 83631 transitions. [2021-06-05 03:59:15,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:15,245 INFO L276 IsEmpty]: Start isEmpty. Operand 26333 states and 83631 transitions. [2021-06-05 03:59:15,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:15,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:15,279 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:15,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable907,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:15,479 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:15,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:15,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1440527573, now seen corresponding path program 493 times [2021-06-05 03:59:15,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:15,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608135297] [2021-06-05 03:59:15,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:15,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:15,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608135297] [2021-06-05 03:59:15,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608135297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:15,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751020014] [2021-06-05 03:59:15,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:15,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:59:15,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:15,809 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:15,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751020014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:15,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:15,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-05 03:59:15,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039211732] [2021-06-05 03:59:15,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:59:15,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:15,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:59:15,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:59:15,809 INFO L87 Difference]: Start difference. First operand 26333 states and 83631 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:16,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:16,176 INFO L93 Difference]: Finished difference Result 26840 states and 84655 transitions. [2021-06-05 03:59:16,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:59:16,177 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:16,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:16,218 INFO L225 Difference]: With dead ends: 26840 [2021-06-05 03:59:16,218 INFO L226 Difference]: Without dead ends: 26827 [2021-06-05 03:59:16,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 314.6ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:59:16,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26827 states. [2021-06-05 03:59:16,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26827 to 26329. [2021-06-05 03:59:16,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26329 states, 26328 states have (on average 3.175820419325433) internal successors, (83613), 26328 states have internal predecessors, (83613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26329 states to 26329 states and 83613 transitions. [2021-06-05 03:59:16,667 INFO L78 Accepts]: Start accepts. Automaton has 26329 states and 83613 transitions. Word has length 25 [2021-06-05 03:59:16,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:16,667 INFO L482 AbstractCegarLoop]: Abstraction has 26329 states and 83613 transitions. [2021-06-05 03:59:16,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:16,667 INFO L276 IsEmpty]: Start isEmpty. Operand 26329 states and 83613 transitions. [2021-06-05 03:59:16,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:16,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:16,707 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:16,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable910 [2021-06-05 03:59:16,921 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:16,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:16,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1975757375, now seen corresponding path program 494 times [2021-06-05 03:59:16,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:16,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267313272] [2021-06-05 03:59:16,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:17,062 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:17,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:17,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267313272] [2021-06-05 03:59:17,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267313272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:17,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509312390] [2021-06-05 03:59:17,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:17,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:59:17,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:17,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:59:17,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:17,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509312390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:17,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:17,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-05 03:59:17,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428680064] [2021-06-05 03:59:17,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:59:17,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:17,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:59:17,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:59:17,263 INFO L87 Difference]: Start difference. First operand 26329 states and 83613 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:17,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:17,710 INFO L93 Difference]: Finished difference Result 26818 states and 84533 transitions. [2021-06-05 03:59:17,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:59:17,710 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:17,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:17,749 INFO L225 Difference]: With dead ends: 26818 [2021-06-05 03:59:17,749 INFO L226 Difference]: Without dead ends: 26802 [2021-06-05 03:59:17,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 333.5ms TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:59:17,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26802 states. [2021-06-05 03:59:18,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26802 to 26325. [2021-06-05 03:59:18,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26325 states, 26324 states have (on average 3.175657194955174) internal successors, (83596), 26324 states have internal predecessors, (83596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:18,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26325 states to 26325 states and 83596 transitions. [2021-06-05 03:59:18,322 INFO L78 Accepts]: Start accepts. Automaton has 26325 states and 83596 transitions. Word has length 25 [2021-06-05 03:59:18,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:18,323 INFO L482 AbstractCegarLoop]: Abstraction has 26325 states and 83596 transitions. [2021-06-05 03:59:18,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:18,323 INFO L276 IsEmpty]: Start isEmpty. Operand 26325 states and 83596 transitions. [2021-06-05 03:59:18,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:18,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:18,356 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:18,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable913,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:18,556 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:18,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:18,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1388012053, now seen corresponding path program 495 times [2021-06-05 03:59:18,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:18,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588828049] [2021-06-05 03:59:18,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:18,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:18,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588828049] [2021-06-05 03:59:18,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588828049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:18,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161331545] [2021-06-05 03:59:18,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:18,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 03:59:18,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:18,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:59:18,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:18,903 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:18,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161331545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:18,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:18,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-05 03:59:18,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911529574] [2021-06-05 03:59:18,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:59:18,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:18,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:59:18,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:59:18,904 INFO L87 Difference]: Start difference. First operand 26325 states and 83596 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:19,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:19,368 INFO L93 Difference]: Finished difference Result 26741 states and 84363 transitions. [2021-06-05 03:59:19,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:59:19,369 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:19,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:19,408 INFO L225 Difference]: With dead ends: 26741 [2021-06-05 03:59:19,408 INFO L226 Difference]: Without dead ends: 26722 [2021-06-05 03:59:19,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 357.2ms TimeCoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:59:19,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26722 states. [2021-06-05 03:59:19,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26722 to 26330. [2021-06-05 03:59:19,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26330 states, 26329 states have (on average 3.1751300846974817) internal successors, (83598), 26329 states have internal predecessors, (83598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:19,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26330 states to 26330 states and 83598 transitions. [2021-06-05 03:59:19,828 INFO L78 Accepts]: Start accepts. Automaton has 26330 states and 83598 transitions. Word has length 25 [2021-06-05 03:59:19,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:19,828 INFO L482 AbstractCegarLoop]: Abstraction has 26330 states and 83598 transitions. [2021-06-05 03:59:19,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:19,828 INFO L276 IsEmpty]: Start isEmpty. Operand 26330 states and 83598 transitions. [2021-06-05 03:59:19,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:19,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:19,861 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:20,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable916,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:20,061 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:20,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:20,062 INFO L82 PathProgramCache]: Analyzing trace with hash 347776255, now seen corresponding path program 496 times [2021-06-05 03:59:20,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:20,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385071207] [2021-06-05 03:59:20,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:20,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:20,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385071207] [2021-06-05 03:59:20,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385071207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:20,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661635301] [2021-06-05 03:59:20,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:20,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:20,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:20,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:59:20,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:20,410 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:20,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661635301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:20,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:20,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-05 03:59:20,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544464625] [2021-06-05 03:59:20,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:59:20,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:20,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:59:20,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:59:20,411 INFO L87 Difference]: Start difference. First operand 26330 states and 83598 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:20,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:20,892 INFO L93 Difference]: Finished difference Result 26637 states and 84135 transitions. [2021-06-05 03:59:20,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:59:20,892 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:20,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:20,930 INFO L225 Difference]: With dead ends: 26637 [2021-06-05 03:59:20,930 INFO L226 Difference]: Without dead ends: 26630 [2021-06-05 03:59:20,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 363.4ms TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:59:20,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26630 states. [2021-06-05 03:59:21,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26630 to 26326. [2021-06-05 03:59:21,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26326 states, 26325 states have (on average 3.175156695156695) internal successors, (83586), 26325 states have internal predecessors, (83586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:21,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26326 states to 26326 states and 83586 transitions. [2021-06-05 03:59:21,360 INFO L78 Accepts]: Start accepts. Automaton has 26326 states and 83586 transitions. Word has length 25 [2021-06-05 03:59:21,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:21,361 INFO L482 AbstractCegarLoop]: Abstraction has 26326 states and 83586 transitions. [2021-06-05 03:59:21,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:21,361 INFO L276 IsEmpty]: Start isEmpty. Operand 26326 states and 83586 transitions. [2021-06-05 03:59:21,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:21,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:21,395 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:21,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable919 [2021-06-05 03:59:21,595 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:21,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:21,595 INFO L82 PathProgramCache]: Analyzing trace with hash 755669175, now seen corresponding path program 497 times [2021-06-05 03:59:21,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:21,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830720216] [2021-06-05 03:59:21,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:21,738 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:21,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:21,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830720216] [2021-06-05 03:59:21,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830720216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:21,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729034972] [2021-06-05 03:59:21,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:21,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:59:21,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:21,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:59:21,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:21,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729034972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:21,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:21,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-06-05 03:59:21,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154200614] [2021-06-05 03:59:21,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:59:21,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:21,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:59:21,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:59:21,972 INFO L87 Difference]: Start difference. First operand 26326 states and 83586 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:22,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:22,331 INFO L93 Difference]: Finished difference Result 26655 states and 84164 transitions. [2021-06-05 03:59:22,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:22,332 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:22,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:22,371 INFO L225 Difference]: With dead ends: 26655 [2021-06-05 03:59:22,371 INFO L226 Difference]: Without dead ends: 26639 [2021-06-05 03:59:22,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 356.9ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:59:22,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26639 states. [2021-06-05 03:59:22,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26639 to 26300. [2021-06-05 03:59:22,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26300 states, 26299 states have (on average 3.1746073995208945) internal successors, (83489), 26299 states have internal predecessors, (83489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:22,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26300 states to 26300 states and 83489 transitions. [2021-06-05 03:59:22,913 INFO L78 Accepts]: Start accepts. Automaton has 26300 states and 83489 transitions. Word has length 25 [2021-06-05 03:59:22,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:22,913 INFO L482 AbstractCegarLoop]: Abstraction has 26300 states and 83489 transitions. [2021-06-05 03:59:22,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:22,913 INFO L276 IsEmpty]: Start isEmpty. Operand 26300 states and 83489 transitions. [2021-06-05 03:59:22,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:22,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:22,950 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:23,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable922,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:23,151 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:23,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:23,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1053722133, now seen corresponding path program 498 times [2021-06-05 03:59:23,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:23,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394404160] [2021-06-05 03:59:23,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:23,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:23,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394404160] [2021-06-05 03:59:23,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394404160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:23,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320717209] [2021-06-05 03:59:23,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:23,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:59:23,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:23,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:59:23,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:23,514 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:23,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320717209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:23,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:23,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-06-05 03:59:23,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169068836] [2021-06-05 03:59:23,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:59:23,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:23,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:59:23,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:59:23,515 INFO L87 Difference]: Start difference. First operand 26300 states and 83489 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:23,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:23,920 INFO L93 Difference]: Finished difference Result 26683 states and 84164 transitions. [2021-06-05 03:59:23,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:59:23,920 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:23,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:23,962 INFO L225 Difference]: With dead ends: 26683 [2021-06-05 03:59:23,962 INFO L226 Difference]: Without dead ends: 26664 [2021-06-05 03:59:23,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 355.1ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:59:23,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26664 states. [2021-06-05 03:59:24,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26664 to 26276. [2021-06-05 03:59:24,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26276 states, 26275 states have (on average 3.1743482397716463) internal successors, (83406), 26275 states have internal predecessors, (83406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:24,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26276 states to 26276 states and 83406 transitions. [2021-06-05 03:59:24,426 INFO L78 Accepts]: Start accepts. Automaton has 26276 states and 83406 transitions. Word has length 25 [2021-06-05 03:59:24,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:24,426 INFO L482 AbstractCegarLoop]: Abstraction has 26276 states and 83406 transitions. [2021-06-05 03:59:24,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:24,426 INFO L276 IsEmpty]: Start isEmpty. Operand 26276 states and 83406 transitions. [2021-06-05 03:59:24,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:24,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:24,462 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:24,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable925 [2021-06-05 03:59:24,663 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:24,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:24,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1703429239, now seen corresponding path program 499 times [2021-06-05 03:59:24,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:24,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796236650] [2021-06-05 03:59:24,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:24,812 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:24,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:24,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796236650] [2021-06-05 03:59:24,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796236650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:24,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042719134] [2021-06-05 03:59:24,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:24,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:59:24,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:24,999 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:24,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042719134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:24,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:24,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-05 03:59:24,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633330601] [2021-06-05 03:59:25,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:59:25,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:25,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:59:25,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:59:25,000 INFO L87 Difference]: Start difference. First operand 26276 states and 83406 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:25,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:25,412 INFO L93 Difference]: Finished difference Result 26515 states and 83825 transitions. [2021-06-05 03:59:25,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:59:25,413 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:25,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:25,455 INFO L225 Difference]: With dead ends: 26515 [2021-06-05 03:59:25,455 INFO L226 Difference]: Without dead ends: 26493 [2021-06-05 03:59:25,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 352.8ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:59:25,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26493 states. [2021-06-05 03:59:25,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26493 to 26252. [2021-06-05 03:59:25,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26252 states, 26251 states have (on average 3.174507637804274) internal successors, (83334), 26251 states have internal predecessors, (83334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:25,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26252 states to 26252 states and 83334 transitions. [2021-06-05 03:59:25,918 INFO L78 Accepts]: Start accepts. Automaton has 26252 states and 83334 transitions. Word has length 25 [2021-06-05 03:59:25,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:25,918 INFO L482 AbstractCegarLoop]: Abstraction has 26252 states and 83334 transitions. [2021-06-05 03:59:25,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:25,919 INFO L276 IsEmpty]: Start isEmpty. Operand 26252 states and 83334 transitions. [2021-06-05 03:59:25,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:25,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:25,954 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:26,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable928,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:26,154 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:26,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:26,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1221619073, now seen corresponding path program 500 times [2021-06-05 03:59:26,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:26,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17674149] [2021-06-05 03:59:26,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:26,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:26,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17674149] [2021-06-05 03:59:26,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17674149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:26,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101002880] [2021-06-05 03:59:26,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:26,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:59:26,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:26,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:59:26,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:26,491 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:26,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101002880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:26,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:26,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-06-05 03:59:26,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643725556] [2021-06-05 03:59:26,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:59:26,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:26,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:59:26,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:59:26,492 INFO L87 Difference]: Start difference. First operand 26252 states and 83334 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:26,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:26,855 INFO L93 Difference]: Finished difference Result 27031 states and 85190 transitions. [2021-06-05 03:59:26,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:59:26,856 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:26,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:26,897 INFO L225 Difference]: With dead ends: 27031 [2021-06-05 03:59:26,897 INFO L226 Difference]: Without dead ends: 27021 [2021-06-05 03:59:26,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 306.5ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:59:26,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27021 states. [2021-06-05 03:59:27,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27021 to 26424. [2021-06-05 03:59:27,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26424 states, 26423 states have (on average 3.1765885781326872) internal successors, (83935), 26423 states have internal predecessors, (83935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26424 states to 26424 states and 83935 transitions. [2021-06-05 03:59:27,460 INFO L78 Accepts]: Start accepts. Automaton has 26424 states and 83935 transitions. Word has length 25 [2021-06-05 03:59:27,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:27,460 INFO L482 AbstractCegarLoop]: Abstraction has 26424 states and 83935 transitions. [2021-06-05 03:59:27,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:27,460 INFO L276 IsEmpty]: Start isEmpty. Operand 26424 states and 83935 transitions. [2021-06-05 03:59:27,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:27,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:27,494 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:27,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable931,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:27,695 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:27,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:27,695 INFO L82 PathProgramCache]: Analyzing trace with hash 393083651, now seen corresponding path program 501 times [2021-06-05 03:59:27,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:27,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935153664] [2021-06-05 03:59:27,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:27,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:27,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935153664] [2021-06-05 03:59:27,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935153664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:27,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219829865] [2021-06-05 03:59:27,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:27,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:59:27,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:27,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:59:27,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:28,019 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:28,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219829865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:28,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:28,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-06-05 03:59:28,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589757910] [2021-06-05 03:59:28,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:59:28,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:28,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:59:28,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:59:28,020 INFO L87 Difference]: Start difference. First operand 26424 states and 83935 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:28,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:28,365 INFO L93 Difference]: Finished difference Result 27015 states and 85143 transitions. [2021-06-05 03:59:28,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:59:28,365 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:28,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:28,407 INFO L225 Difference]: With dead ends: 27015 [2021-06-05 03:59:28,407 INFO L226 Difference]: Without dead ends: 27008 [2021-06-05 03:59:28,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 295.8ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:59:28,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27008 states. [2021-06-05 03:59:28,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27008 to 26408. [2021-06-05 03:59:28,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26408 states, 26407 states have (on average 3.176506229408869) internal successors, (83882), 26407 states have internal predecessors, (83882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:28,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26408 states to 26408 states and 83882 transitions. [2021-06-05 03:59:28,841 INFO L78 Accepts]: Start accepts. Automaton has 26408 states and 83882 transitions. Word has length 25 [2021-06-05 03:59:28,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:28,841 INFO L482 AbstractCegarLoop]: Abstraction has 26408 states and 83882 transitions. [2021-06-05 03:59:28,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:28,841 INFO L276 IsEmpty]: Start isEmpty. Operand 26408 states and 83882 transitions. [2021-06-05 03:59:28,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:28,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:28,875 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:29,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable934 [2021-06-05 03:59:29,075 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:29,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:29,076 INFO L82 PathProgramCache]: Analyzing trace with hash -650164267, now seen corresponding path program 502 times [2021-06-05 03:59:29,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:29,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522863054] [2021-06-05 03:59:29,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:29,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:29,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522863054] [2021-06-05 03:59:29,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522863054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:29,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751477719] [2021-06-05 03:59:29,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:29,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:29,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:29,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:59:29,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:29,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751477719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:29,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:29,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-05 03:59:29,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859944358] [2021-06-05 03:59:29,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:59:29,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:29,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:59:29,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:59:29,404 INFO L87 Difference]: Start difference. First operand 26408 states and 83882 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:29,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:29,778 INFO L93 Difference]: Finished difference Result 27006 states and 85093 transitions. [2021-06-05 03:59:29,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:59:29,779 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:29,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:29,820 INFO L225 Difference]: With dead ends: 27006 [2021-06-05 03:59:29,820 INFO L226 Difference]: Without dead ends: 26993 [2021-06-05 03:59:29,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 300.7ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:59:29,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26993 states. [2021-06-05 03:59:30,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26993 to 26403. [2021-06-05 03:59:30,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26403 states, 26402 states have (on average 3.176312400575714) internal successors, (83861), 26402 states have internal predecessors, (83861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:30,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26403 states to 26403 states and 83861 transitions. [2021-06-05 03:59:30,247 INFO L78 Accepts]: Start accepts. Automaton has 26403 states and 83861 transitions. Word has length 25 [2021-06-05 03:59:30,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:30,248 INFO L482 AbstractCegarLoop]: Abstraction has 26403 states and 83861 transitions. [2021-06-05 03:59:30,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:30,248 INFO L276 IsEmpty]: Start isEmpty. Operand 26403 states and 83861 transitions. [2021-06-05 03:59:30,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:30,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:30,281 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:30,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable937,506 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:30,481 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:30,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:30,481 INFO L82 PathProgramCache]: Analyzing trace with hash -114934465, now seen corresponding path program 503 times [2021-06-05 03:59:30,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:30,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98141150] [2021-06-05 03:59:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:30,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:30,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98141150] [2021-06-05 03:59:30,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98141150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:30,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143384830] [2021-06-05 03:59:30,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:30,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:59:30,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:30,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:59:30,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:30,816 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:30,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143384830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:30,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:30,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-05 03:59:30,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859732305] [2021-06-05 03:59:30,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:59:30,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:30,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:59:30,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:59:30,817 INFO L87 Difference]: Start difference. First operand 26403 states and 83861 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:31,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:31,203 INFO L93 Difference]: Finished difference Result 27006 states and 85046 transitions. [2021-06-05 03:59:31,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:59:31,203 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:31,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:31,242 INFO L225 Difference]: With dead ends: 27006 [2021-06-05 03:59:31,242 INFO L226 Difference]: Without dead ends: 26990 [2021-06-05 03:59:31,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 329.2ms TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:59:31,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26990 states. [2021-06-05 03:59:31,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26990 to 26398. [2021-06-05 03:59:31,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26398 states, 26397 states have (on average 3.176156381406978) internal successors, (83841), 26397 states have internal predecessors, (83841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:31,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26398 states to 26398 states and 83841 transitions. [2021-06-05 03:59:31,820 INFO L78 Accepts]: Start accepts. Automaton has 26398 states and 83841 transitions. Word has length 25 [2021-06-05 03:59:31,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:31,820 INFO L482 AbstractCegarLoop]: Abstraction has 26398 states and 83841 transitions. [2021-06-05 03:59:31,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:31,820 INFO L276 IsEmpty]: Start isEmpty. Operand 26398 states and 83841 transitions. [2021-06-05 03:59:31,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:31,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:31,851 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:32,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable940 [2021-06-05 03:59:32,051 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:32,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:32,052 INFO L82 PathProgramCache]: Analyzing trace with hash -702679787, now seen corresponding path program 504 times [2021-06-05 03:59:32,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:32,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525437847] [2021-06-05 03:59:32,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:32,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:32,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:32,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525437847] [2021-06-05 03:59:32,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525437847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:32,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240437740] [2021-06-05 03:59:32,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:32,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:59:32,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:32,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:59:32,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:32,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240437740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:32,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:32,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-05 03:59:32,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036773556] [2021-06-05 03:59:32,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:59:32,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:32,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:59:32,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:59:32,370 INFO L87 Difference]: Start difference. First operand 26398 states and 83841 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:32,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:32,801 INFO L93 Difference]: Finished difference Result 27010 states and 85005 transitions. [2021-06-05 03:59:32,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:59:32,802 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:32,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:32,843 INFO L225 Difference]: With dead ends: 27010 [2021-06-05 03:59:32,843 INFO L226 Difference]: Without dead ends: 26991 [2021-06-05 03:59:32,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 330.3ms TimeCoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:59:32,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26991 states. [2021-06-05 03:59:33,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26991 to 26393. [2021-06-05 03:59:33,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26393 states, 26392 states have (on average 3.176038193391937) internal successors, (83822), 26392 states have internal predecessors, (83822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:33,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26393 states to 26393 states and 83822 transitions. [2021-06-05 03:59:33,266 INFO L78 Accepts]: Start accepts. Automaton has 26393 states and 83822 transitions. Word has length 25 [2021-06-05 03:59:33,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:33,267 INFO L482 AbstractCegarLoop]: Abstraction has 26393 states and 83822 transitions. [2021-06-05 03:59:33,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:33,267 INFO L276 IsEmpty]: Start isEmpty. Operand 26393 states and 83822 transitions. [2021-06-05 03:59:33,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:33,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:33,301 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:33,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable943,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:33,501 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:33,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:33,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1742915585, now seen corresponding path program 505 times [2021-06-05 03:59:33,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:33,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286238651] [2021-06-05 03:59:33,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:33,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:33,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286238651] [2021-06-05 03:59:33,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286238651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:33,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28128533] [2021-06-05 03:59:33,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:33,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:59:33,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:33,866 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:33,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28128533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:33,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:33,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-05 03:59:33,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327195146] [2021-06-05 03:59:33,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:59:33,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:33,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:59:33,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:59:33,867 INFO L87 Difference]: Start difference. First operand 26393 states and 83822 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:34,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:34,319 INFO L93 Difference]: Finished difference Result 26898 states and 84763 transitions. [2021-06-05 03:59:34,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:59:34,319 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:34,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:34,360 INFO L225 Difference]: With dead ends: 26898 [2021-06-05 03:59:34,360 INFO L226 Difference]: Without dead ends: 26876 [2021-06-05 03:59:34,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 374.4ms TimeCoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:59:34,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26876 states. [2021-06-05 03:59:34,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26876 to 26388. [2021-06-05 03:59:34,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26388 states, 26387 states have (on average 3.175957858036154) internal successors, (83804), 26387 states have internal predecessors, (83804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:34,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26388 states to 26388 states and 83804 transitions. [2021-06-05 03:59:34,798 INFO L78 Accepts]: Start accepts. Automaton has 26388 states and 83804 transitions. Word has length 25 [2021-06-05 03:59:34,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:34,798 INFO L482 AbstractCegarLoop]: Abstraction has 26388 states and 83804 transitions. [2021-06-05 03:59:34,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:34,798 INFO L276 IsEmpty]: Start isEmpty. Operand 26388 states and 83804 transitions. [2021-06-05 03:59:34,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 03:59:34,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:34,832 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:35,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable946 [2021-06-05 03:59:35,033 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:35,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:35,033 INFO L82 PathProgramCache]: Analyzing trace with hash 369513045, now seen corresponding path program 506 times [2021-06-05 03:59:35,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:35,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806076510] [2021-06-05 03:59:35,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:35,182 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:35,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:35,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806076510] [2021-06-05 03:59:35,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806076510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:35,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584725279] [2021-06-05 03:59:35,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:35,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:59:35,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:35,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 03:59:35,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:35,356 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:35,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584725279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:35,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:35,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-05 03:59:35,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143034032] [2021-06-05 03:59:35,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:59:35,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:35,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:59:35,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:59:35,356 INFO L87 Difference]: Start difference. First operand 26388 states and 83804 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:35,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:35,917 INFO L93 Difference]: Finished difference Result 26777 states and 84498 transitions. [2021-06-05 03:59:35,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:59:35,917 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 03:59:35,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:35,956 INFO L225 Difference]: With dead ends: 26777 [2021-06-05 03:59:35,957 INFO L226 Difference]: Without dead ends: 26770 [2021-06-05 03:59:35,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 355.0ms TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:59:35,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26770 states. [2021-06-05 03:59:36,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26770 to 26383. [2021-06-05 03:59:36,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26383 states, 26382 states have (on average 3.1759912061253885) internal successors, (83789), 26382 states have internal predecessors, (83789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:36,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26383 states to 26383 states and 83789 transitions. [2021-06-05 03:59:36,485 INFO L78 Accepts]: Start accepts. Automaton has 26383 states and 83789 transitions. Word has length 25 [2021-06-05 03:59:36,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:36,485 INFO L482 AbstractCegarLoop]: Abstraction has 26383 states and 83789 transitions. [2021-06-05 03:59:36,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:36,485 INFO L276 IsEmpty]: Start isEmpty. Operand 26383 states and 83789 transitions. [2021-06-05 03:59:36,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:59:36,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:36,519 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:36,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable949,510 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:36,719 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:36,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:36,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1225505269, now seen corresponding path program 507 times [2021-06-05 03:59:36,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:36,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167539303] [2021-06-05 03:59:36,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:36,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:36,800 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:36,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:36,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167539303] [2021-06-05 03:59:36,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167539303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:36,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838614409] [2021-06-05 03:59:36,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:36,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:59:36,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:36,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:59:36,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:36,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838614409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:36,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:36,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-06-05 03:59:36,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82290693] [2021-06-05 03:59:36,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:59:36,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:36,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:59:36,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:59:36,965 INFO L87 Difference]: Start difference. First operand 26383 states and 83789 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:37,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:37,215 INFO L93 Difference]: Finished difference Result 34009 states and 106082 transitions. [2021-06-05 03:59:37,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 03:59:37,215 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:59:37,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:37,266 INFO L225 Difference]: With dead ends: 34009 [2021-06-05 03:59:37,267 INFO L226 Difference]: Without dead ends: 33983 [2021-06-05 03:59:37,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 253.1ms TimeCoverageRelationStatistics Valid=386, Invalid=1174, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 03:59:37,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33983 states. [2021-06-05 03:59:37,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33983 to 26378. [2021-06-05 03:59:37,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26378 states, 26377 states have (on average 3.1762141259430563) internal successors, (83779), 26377 states have internal predecessors, (83779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:37,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26378 states to 26378 states and 83779 transitions. [2021-06-05 03:59:37,773 INFO L78 Accepts]: Start accepts. Automaton has 26378 states and 83779 transitions. Word has length 26 [2021-06-05 03:59:37,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:37,773 INFO L482 AbstractCegarLoop]: Abstraction has 26378 states and 83779 transitions. [2021-06-05 03:59:37,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:37,773 INFO L276 IsEmpty]: Start isEmpty. Operand 26378 states and 83779 transitions. [2021-06-05 03:59:37,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:59:37,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:37,808 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:38,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable952,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:38,009 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:38,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:38,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1488462363, now seen corresponding path program 508 times [2021-06-05 03:59:38,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:38,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803845055] [2021-06-05 03:59:38,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:38,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:38,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803845055] [2021-06-05 03:59:38,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803845055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:38,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807996923] [2021-06-05 03:59:38,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:38,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:38,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:38,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:59:38,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:38,215 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:38,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807996923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:38,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:38,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-06-05 03:59:38,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218996280] [2021-06-05 03:59:38,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:59:38,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:38,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:59:38,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:59:38,216 INFO L87 Difference]: Start difference. First operand 26378 states and 83779 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:38,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:38,456 INFO L93 Difference]: Finished difference Result 34313 states and 106998 transitions. [2021-06-05 03:59:38,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:59:38,456 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:59:38,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:38,508 INFO L225 Difference]: With dead ends: 34313 [2021-06-05 03:59:38,508 INFO L226 Difference]: Without dead ends: 34313 [2021-06-05 03:59:38,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 176.9ms TimeCoverageRelationStatistics Valid=307, Invalid=685, Unknown=0, NotChecked=0, Total=992 [2021-06-05 03:59:38,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34313 states. [2021-06-05 03:59:38,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34313 to 26571. [2021-06-05 03:59:38,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26571 states, 26570 states have (on average 3.174934136243884) internal successors, (84358), 26570 states have internal predecessors, (84358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:39,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26571 states to 26571 states and 84358 transitions. [2021-06-05 03:59:39,012 INFO L78 Accepts]: Start accepts. Automaton has 26571 states and 84358 transitions. Word has length 26 [2021-06-05 03:59:39,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:39,013 INFO L482 AbstractCegarLoop]: Abstraction has 26571 states and 84358 transitions. [2021-06-05 03:59:39,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:39,013 INFO L276 IsEmpty]: Start isEmpty. Operand 26571 states and 84358 transitions. [2021-06-05 03:59:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:59:39,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:39,048 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:39,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable953 [2021-06-05 03:59:39,248 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:39,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:39,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1597240143, now seen corresponding path program 509 times [2021-06-05 03:59:39,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:39,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898466070] [2021-06-05 03:59:39,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:39,319 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:39,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:39,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898466070] [2021-06-05 03:59:39,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898466070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:39,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958128145] [2021-06-05 03:59:39,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:39,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:59:39,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:39,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:59:39,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:39,469 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:39,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958128145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:39,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:39,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 03:59:39,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456423369] [2021-06-05 03:59:39,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 03:59:39,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:39,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 03:59:39,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:59:39,470 INFO L87 Difference]: Start difference. First operand 26571 states and 84358 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:40,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:40,497 INFO L93 Difference]: Finished difference Result 38199 states and 118872 transitions. [2021-06-05 03:59:40,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 03:59:40,498 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:59:40,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:40,558 INFO L225 Difference]: With dead ends: 38199 [2021-06-05 03:59:40,558 INFO L226 Difference]: Without dead ends: 38187 [2021-06-05 03:59:40,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2365 ImplicationChecksByTransitivity, 809.9ms TimeCoverageRelationStatistics Valid=2504, Invalid=5506, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 03:59:40,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38187 states. [2021-06-05 03:59:41,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38187 to 30268. [2021-06-05 03:59:41,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30268 states, 30267 states have (on average 3.1952621667162258) internal successors, (96711), 30267 states have internal predecessors, (96711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:41,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30268 states to 30268 states and 96711 transitions. [2021-06-05 03:59:41,211 INFO L78 Accepts]: Start accepts. Automaton has 30268 states and 96711 transitions. Word has length 26 [2021-06-05 03:59:41,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:41,211 INFO L482 AbstractCegarLoop]: Abstraction has 30268 states and 96711 transitions. [2021-06-05 03:59:41,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:41,211 INFO L276 IsEmpty]: Start isEmpty. Operand 30268 states and 96711 transitions. [2021-06-05 03:59:41,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:59:41,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:41,253 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:41,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 513 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable954 [2021-06-05 03:59:41,453 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:41,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:41,454 INFO L82 PathProgramCache]: Analyzing trace with hash -2126272347, now seen corresponding path program 510 times [2021-06-05 03:59:41,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:41,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190064108] [2021-06-05 03:59:41,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:41,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:41,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190064108] [2021-06-05 03:59:41,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190064108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:41,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413216785] [2021-06-05 03:59:41,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:41,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:59:41,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:41,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:59:41,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:41,672 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:41,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413216785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:41,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:41,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 03:59:41,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098123844] [2021-06-05 03:59:41,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 03:59:41,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:41,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 03:59:41,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:59:41,673 INFO L87 Difference]: Start difference. First operand 30268 states and 96711 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:42,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:42,684 INFO L93 Difference]: Finished difference Result 37783 states and 117254 transitions. [2021-06-05 03:59:42,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 03:59:42,685 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:59:42,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:42,760 INFO L225 Difference]: With dead ends: 37783 [2021-06-05 03:59:42,760 INFO L226 Difference]: Without dead ends: 37777 [2021-06-05 03:59:42,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2858 ImplicationChecksByTransitivity, 772.5ms TimeCoverageRelationStatistics Valid=2139, Invalid=6791, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 03:59:42,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37777 states. [2021-06-05 03:59:43,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37777 to 28751. [2021-06-05 03:59:43,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28751 states, 28750 states have (on average 3.173495652173913) internal successors, (91238), 28750 states have internal predecessors, (91238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:43,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28751 states to 28751 states and 91238 transitions. [2021-06-05 03:59:43,350 INFO L78 Accepts]: Start accepts. Automaton has 28751 states and 91238 transitions. Word has length 26 [2021-06-05 03:59:43,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:43,350 INFO L482 AbstractCegarLoop]: Abstraction has 28751 states and 91238 transitions. [2021-06-05 03:59:43,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:43,350 INFO L276 IsEmpty]: Start isEmpty. Operand 28751 states and 91238 transitions. [2021-06-05 03:59:43,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:59:43,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:43,388 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:43,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable955,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:43,588 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:43,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:43,588 INFO L82 PathProgramCache]: Analyzing trace with hash 237123403, now seen corresponding path program 511 times [2021-06-05 03:59:43,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:43,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906535260] [2021-06-05 03:59:43,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:43,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:43,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906535260] [2021-06-05 03:59:43,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906535260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:43,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303924051] [2021-06-05 03:59:43,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:43,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:59:43,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:43,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303924051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:43,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:43,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 03:59:43,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535789013] [2021-06-05 03:59:43,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 03:59:43,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:43,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 03:59:43,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:59:43,796 INFO L87 Difference]: Start difference. First operand 28751 states and 91238 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:45,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:45,034 INFO L93 Difference]: Finished difference Result 33431 states and 104589 transitions. [2021-06-05 03:59:45,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 03:59:45,034 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:59:45,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:45,083 INFO L225 Difference]: With dead ends: 33431 [2021-06-05 03:59:45,084 INFO L226 Difference]: Without dead ends: 33431 [2021-06-05 03:59:45,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 956.9ms TimeCoverageRelationStatistics Valid=3559, Invalid=6541, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 03:59:45,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33431 states. [2021-06-05 03:59:45,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33431 to 30211. [2021-06-05 03:59:45,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30211 states, 30210 states have (on average 3.1860973187686197) internal successors, (96252), 30210 states have internal predecessors, (96252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:45,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30211 states to 30211 states and 96252 transitions. [2021-06-05 03:59:45,702 INFO L78 Accepts]: Start accepts. Automaton has 30211 states and 96252 transitions. Word has length 26 [2021-06-05 03:59:45,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:45,703 INFO L482 AbstractCegarLoop]: Abstraction has 30211 states and 96252 transitions. [2021-06-05 03:59:45,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:45,703 INFO L276 IsEmpty]: Start isEmpty. Operand 30211 states and 96252 transitions. [2021-06-05 03:59:45,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:59:45,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:45,742 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:45,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable956,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:45,942 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:45,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:45,943 INFO L82 PathProgramCache]: Analyzing trace with hash -227467701, now seen corresponding path program 512 times [2021-06-05 03:59:45,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:45,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61387474] [2021-06-05 03:59:45,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:46,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:46,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61387474] [2021-06-05 03:59:46,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61387474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:46,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552556878] [2021-06-05 03:59:46,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:46,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:59:46,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:46,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:59:46,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:46,152 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:46,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552556878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:46,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:46,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 03:59:46,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106627547] [2021-06-05 03:59:46,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 03:59:46,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:46,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 03:59:46,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:59:46,153 INFO L87 Difference]: Start difference. First operand 30211 states and 96252 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:47,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:47,353 INFO L93 Difference]: Finished difference Result 32625 states and 102515 transitions. [2021-06-05 03:59:47,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 03:59:47,353 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:59:47,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:47,402 INFO L225 Difference]: With dead ends: 32625 [2021-06-05 03:59:47,402 INFO L226 Difference]: Without dead ends: 32621 [2021-06-05 03:59:47,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3357 ImplicationChecksByTransitivity, 961.6ms TimeCoverageRelationStatistics Valid=4219, Invalid=7991, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 03:59:47,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32621 states. [2021-06-05 03:59:47,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32621 to 27450. [2021-06-05 03:59:47,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27450 states, 27449 states have (on average 3.1584757186054135) internal successors, (86697), 27449 states have internal predecessors, (86697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:47,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27450 states to 27450 states and 86697 transitions. [2021-06-05 03:59:47,886 INFO L78 Accepts]: Start accepts. Automaton has 27450 states and 86697 transitions. Word has length 26 [2021-06-05 03:59:47,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:47,886 INFO L482 AbstractCegarLoop]: Abstraction has 27450 states and 86697 transitions. [2021-06-05 03:59:47,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:47,886 INFO L276 IsEmpty]: Start isEmpty. Operand 27450 states and 86697 transitions. [2021-06-05 03:59:47,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:59:47,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:47,921 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:48,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable957,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:48,121 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:48,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:48,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1591042545, now seen corresponding path program 513 times [2021-06-05 03:59:48,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:48,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903432231] [2021-06-05 03:59:48,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:48,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:48,194 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:48,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:48,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903432231] [2021-06-05 03:59:48,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903432231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:48,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319818809] [2021-06-05 03:59:48,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:48,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:59:48,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:48,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:59:48,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:48,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319818809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:48,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:48,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 03:59:48,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985761704] [2021-06-05 03:59:48,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 03:59:48,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:48,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 03:59:48,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:59:48,343 INFO L87 Difference]: Start difference. First operand 27450 states and 86697 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:49,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:49,263 INFO L93 Difference]: Finished difference Result 35448 states and 108975 transitions. [2021-06-05 03:59:49,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 03:59:49,263 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:59:49,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:49,316 INFO L225 Difference]: With dead ends: 35448 [2021-06-05 03:59:49,317 INFO L226 Difference]: Without dead ends: 35439 [2021-06-05 03:59:49,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2569 ImplicationChecksByTransitivity, 723.1ms TimeCoverageRelationStatistics Valid=1836, Invalid=6174, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 03:59:49,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35439 states. [2021-06-05 03:59:49,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35439 to 27796. [2021-06-05 03:59:49,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27796 states, 27795 states have (on average 3.1588774959525097) internal successors, (87801), 27795 states have internal predecessors, (87801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:49,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27796 states to 27796 states and 87801 transitions. [2021-06-05 03:59:49,829 INFO L78 Accepts]: Start accepts. Automaton has 27796 states and 87801 transitions. Word has length 26 [2021-06-05 03:59:49,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:49,829 INFO L482 AbstractCegarLoop]: Abstraction has 27796 states and 87801 transitions. [2021-06-05 03:59:49,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:49,829 INFO L276 IsEmpty]: Start isEmpty. Operand 27796 states and 87801 transitions. [2021-06-05 03:59:49,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:59:49,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:49,865 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:50,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable958 [2021-06-05 03:59:50,065 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:50,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:50,066 INFO L82 PathProgramCache]: Analyzing trace with hash 2116179429, now seen corresponding path program 514 times [2021-06-05 03:59:50,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:50,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264099231] [2021-06-05 03:59:50,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:50,136 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:50,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:50,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264099231] [2021-06-05 03:59:50,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264099231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:50,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306941039] [2021-06-05 03:59:50,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:50,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:50,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:50,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:59:50,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:50,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306941039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:50,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:50,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 03:59:50,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983297775] [2021-06-05 03:59:50,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 03:59:50,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:50,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 03:59:50,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:59:50,395 INFO L87 Difference]: Start difference. First operand 27796 states and 87801 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:51,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:51,264 INFO L93 Difference]: Finished difference Result 35824 states and 110259 transitions. [2021-06-05 03:59:51,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 03:59:51,265 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:59:51,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:51,317 INFO L225 Difference]: With dead ends: 35824 [2021-06-05 03:59:51,318 INFO L226 Difference]: Without dead ends: 35812 [2021-06-05 03:59:51,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2284 ImplicationChecksByTransitivity, 664.7ms TimeCoverageRelationStatistics Valid=1573, Invalid=5567, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 03:59:51,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35812 states. [2021-06-05 03:59:51,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35812 to 28033. [2021-06-05 03:59:51,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28033 states, 28032 states have (on average 3.161208618721461) internal successors, (88615), 28032 states have internal predecessors, (88615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:51,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28033 states to 28033 states and 88615 transitions. [2021-06-05 03:59:51,833 INFO L78 Accepts]: Start accepts. Automaton has 28033 states and 88615 transitions. Word has length 26 [2021-06-05 03:59:51,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:51,833 INFO L482 AbstractCegarLoop]: Abstraction has 28033 states and 88615 transitions. [2021-06-05 03:59:51,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:51,834 INFO L276 IsEmpty]: Start isEmpty. Operand 28033 states and 88615 transitions. [2021-06-05 03:59:51,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:59:51,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:51,868 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:52,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable959,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:52,069 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:52,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:52,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1075943631, now seen corresponding path program 515 times [2021-06-05 03:59:52,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:52,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091306000] [2021-06-05 03:59:52,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:52,139 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:52,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:52,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091306000] [2021-06-05 03:59:52,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091306000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:52,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696210760] [2021-06-05 03:59:52,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:52,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:59:52,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:52,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:59:52,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:52,281 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:52,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696210760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:52,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:52,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 03:59:52,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861832760] [2021-06-05 03:59:52,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 03:59:52,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:52,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 03:59:52,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:59:52,282 INFO L87 Difference]: Start difference. First operand 28033 states and 88615 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:53,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:53,076 INFO L93 Difference]: Finished difference Result 36830 states and 113799 transitions. [2021-06-05 03:59:53,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 03:59:53,076 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:59:53,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:53,134 INFO L225 Difference]: With dead ends: 36830 [2021-06-05 03:59:53,134 INFO L226 Difference]: Without dead ends: 36815 [2021-06-05 03:59:53,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2000 ImplicationChecksByTransitivity, 616.0ms TimeCoverageRelationStatistics Valid=1351, Invalid=4969, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 03:59:53,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36815 states. [2021-06-05 03:59:53,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36815 to 28168. [2021-06-05 03:59:53,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28168 states, 28167 states have (on average 3.161856072709199) internal successors, (89060), 28167 states have internal predecessors, (89060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:53,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28168 states to 28168 states and 89060 transitions. [2021-06-05 03:59:53,653 INFO L78 Accepts]: Start accepts. Automaton has 28168 states and 89060 transitions. Word has length 26 [2021-06-05 03:59:53,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:53,653 INFO L482 AbstractCegarLoop]: Abstraction has 28168 states and 89060 transitions. [2021-06-05 03:59:53,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:53,653 INFO L276 IsEmpty]: Start isEmpty. Operand 28168 states and 89060 transitions. [2021-06-05 03:59:53,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:59:53,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:53,690 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:53,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable960 [2021-06-05 03:59:53,890 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:53,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:53,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1106595035, now seen corresponding path program 516 times [2021-06-05 03:59:53,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:53,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168048141] [2021-06-05 03:59:53,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:53,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:53,961 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:53,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:53,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168048141] [2021-06-05 03:59:53,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168048141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:53,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38653230] [2021-06-05 03:59:53,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:53,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:59:53,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:53,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:59:53,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:54,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38653230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:54,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:54,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 03:59:54,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395665444] [2021-06-05 03:59:54,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 03:59:54,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:54,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 03:59:54,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:59:54,106 INFO L87 Difference]: Start difference. First operand 28168 states and 89060 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:54,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:54,815 INFO L93 Difference]: Finished difference Result 38080 states and 118134 transitions. [2021-06-05 03:59:54,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 03:59:54,816 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:59:54,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:54,872 INFO L225 Difference]: With dead ends: 38080 [2021-06-05 03:59:54,873 INFO L226 Difference]: Without dead ends: 38062 [2021-06-05 03:59:54,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1716 ImplicationChecksByTransitivity, 571.2ms TimeCoverageRelationStatistics Valid=1171, Invalid=4379, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 03:59:54,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38062 states. [2021-06-05 03:59:55,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38062 to 28241. [2021-06-05 03:59:55,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28241 states, 28240 states have (on average 3.1613668555240793) internal successors, (89277), 28240 states have internal predecessors, (89277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:55,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28241 states to 28241 states and 89277 transitions. [2021-06-05 03:59:55,427 INFO L78 Accepts]: Start accepts. Automaton has 28241 states and 89277 transitions. Word has length 26 [2021-06-05 03:59:55,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:55,427 INFO L482 AbstractCegarLoop]: Abstraction has 28241 states and 89277 transitions. [2021-06-05 03:59:55,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:55,427 INFO L276 IsEmpty]: Start isEmpty. Operand 28241 states and 89277 transitions. [2021-06-05 03:59:55,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:59:55,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:55,462 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:55,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable961 [2021-06-05 03:59:55,663 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:55,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:55,663 INFO L82 PathProgramCache]: Analyzing trace with hash -45816945, now seen corresponding path program 517 times [2021-06-05 03:59:55,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:55,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364874915] [2021-06-05 03:59:55,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:55,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:55,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364874915] [2021-06-05 03:59:55,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364874915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:55,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88041281] [2021-06-05 03:59:55,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:55,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:59:55,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:55,876 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:55,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88041281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:55,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:55,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 03:59:55,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273001137] [2021-06-05 03:59:55,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 03:59:55,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:55,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 03:59:55,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:59:55,877 INFO L87 Difference]: Start difference. First operand 28241 states and 89277 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:56,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:56,577 INFO L93 Difference]: Finished difference Result 38378 states and 118948 transitions. [2021-06-05 03:59:56,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 03:59:56,577 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:59:56,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:56,648 INFO L225 Difference]: With dead ends: 38378 [2021-06-05 03:59:56,648 INFO L226 Difference]: Without dead ends: 38357 [2021-06-05 03:59:56,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 536.2ms TimeCoverageRelationStatistics Valid=1034, Invalid=3796, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 03:59:56,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38357 states. [2021-06-05 03:59:57,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38357 to 28289. [2021-06-05 03:59:57,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28289 states, 28288 states have (on average 3.1601032239819005) internal successors, (89393), 28288 states have internal predecessors, (89393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:57,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28289 states to 28289 states and 89393 transitions. [2021-06-05 03:59:57,236 INFO L78 Accepts]: Start accepts. Automaton has 28289 states and 89393 transitions. Word has length 26 [2021-06-05 03:59:57,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:57,236 INFO L482 AbstractCegarLoop]: Abstraction has 28289 states and 89393 transitions. [2021-06-05 03:59:57,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:57,236 INFO L276 IsEmpty]: Start isEmpty. Operand 28289 states and 89393 transitions. [2021-06-05 03:59:57,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:59:57,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:57,274 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:57,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable962 [2021-06-05 03:59:57,474 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:57,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:57,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1521434523, now seen corresponding path program 518 times [2021-06-05 03:59:57,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:57,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787638116] [2021-06-05 03:59:57,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:57,550 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:57,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:57,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787638116] [2021-06-05 03:59:57,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787638116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:57,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822905241] [2021-06-05 03:59:57,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:57,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:59:57,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:57,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:59:57,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:57,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822905241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:57,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:57,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 03:59:57,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541677753] [2021-06-05 03:59:57,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 03:59:57,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:57,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 03:59:57,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:59:57,697 INFO L87 Difference]: Start difference. First operand 28289 states and 89393 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:58,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:58,164 INFO L93 Difference]: Finished difference Result 35202 states and 108627 transitions. [2021-06-05 03:59:58,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 03:59:58,164 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:59:58,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:58,217 INFO L225 Difference]: With dead ends: 35202 [2021-06-05 03:59:58,217 INFO L226 Difference]: Without dead ends: 35181 [2021-06-05 03:59:58,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 424.3ms TimeCoverageRelationStatistics Valid=776, Invalid=2646, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 03:59:58,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35181 states. [2021-06-05 03:59:58,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35181 to 28289. [2021-06-05 03:59:58,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28289 states, 28288 states have (on average 3.159855769230769) internal successors, (89386), 28288 states have internal predecessors, (89386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:58,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28289 states to 28289 states and 89386 transitions. [2021-06-05 03:59:58,726 INFO L78 Accepts]: Start accepts. Automaton has 28289 states and 89386 transitions. Word has length 26 [2021-06-05 03:59:58,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:58,726 INFO L482 AbstractCegarLoop]: Abstraction has 28289 states and 89386 transitions. [2021-06-05 03:59:58,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:58,726 INFO L276 IsEmpty]: Start isEmpty. Operand 28289 states and 89386 transitions. [2021-06-05 03:59:58,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:59:58,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:58,762 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:58,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable963,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:58,963 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:58,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:58,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1586238833, now seen corresponding path program 519 times [2021-06-05 03:59:58,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:58,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334821822] [2021-06-05 03:59:58,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:59,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:59,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334821822] [2021-06-05 03:59:59,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334821822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:59,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915544012] [2021-06-05 03:59:59,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:59,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 03:59:59,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:59,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:59:59,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:59,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915544012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:59,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:59,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-06-05 03:59:59,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63125360] [2021-06-05 03:59:59,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 03:59:59,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:59,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 03:59:59,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:59:59,299 INFO L87 Difference]: Start difference. First operand 28289 states and 89386 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:00,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:00,485 INFO L93 Difference]: Finished difference Result 31417 states and 97881 transitions. [2021-06-05 04:00:00,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 04:00:00,485 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:00:00,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:00,531 INFO L225 Difference]: With dead ends: 31417 [2021-06-05 04:00:00,531 INFO L226 Difference]: Without dead ends: 31402 [2021-06-05 04:00:00,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2609 ImplicationChecksByTransitivity, 1057.5ms TimeCoverageRelationStatistics Valid=3387, Invalid=6315, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 04:00:00,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31402 states. [2021-06-05 04:00:00,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31402 to 29607. [2021-06-05 04:00:00,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29607 states, 29606 states have (on average 3.1732419104235627) internal successors, (93947), 29606 states have internal predecessors, (93947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:01,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29607 states to 29607 states and 93947 transitions. [2021-06-05 04:00:01,019 INFO L78 Accepts]: Start accepts. Automaton has 29607 states and 93947 transitions. Word has length 26 [2021-06-05 04:00:01,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:01,019 INFO L482 AbstractCegarLoop]: Abstraction has 29607 states and 93947 transitions. [2021-06-05 04:00:01,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:01,020 INFO L276 IsEmpty]: Start isEmpty. Operand 29607 states and 93947 transitions. [2021-06-05 04:00:01,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:00:01,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:01,056 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:01,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 523 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable964 [2021-06-05 04:00:01,256 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:01,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:01,256 INFO L82 PathProgramCache]: Analyzing trace with hash -2050829937, now seen corresponding path program 520 times [2021-06-05 04:00:01,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:01,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849299511] [2021-06-05 04:00:01,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:01,321 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:01,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:01,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849299511] [2021-06-05 04:00:01,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849299511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:01,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162281611] [2021-06-05 04:00:01,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:01,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:00:01,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:01,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:00:01,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:01,464 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:01,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162281611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:01,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:01,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-06-05 04:00:01,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345924191] [2021-06-05 04:00:01,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:00:01,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:01,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:00:01,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:00:01,465 INFO L87 Difference]: Start difference. First operand 29607 states and 93947 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:02,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:02,883 INFO L93 Difference]: Finished difference Result 30731 states and 96043 transitions. [2021-06-05 04:00:02,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 04:00:02,883 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:00:02,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:02,935 INFO L225 Difference]: With dead ends: 30731 [2021-06-05 04:00:02,936 INFO L226 Difference]: Without dead ends: 30719 [2021-06-05 04:00:02,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3423 ImplicationChecksByTransitivity, 1148.1ms TimeCoverageRelationStatistics Valid=4100, Invalid=8332, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 04:00:02,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30719 states. [2021-06-05 04:00:03,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30719 to 27213. [2021-06-05 04:00:03,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27213 states, 27212 states have (on average 3.1501543436719093) internal successors, (85722), 27212 states have internal predecessors, (85722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:03,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27213 states to 27213 states and 85722 transitions. [2021-06-05 04:00:03,471 INFO L78 Accepts]: Start accepts. Automaton has 27213 states and 85722 transitions. Word has length 26 [2021-06-05 04:00:03,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:03,471 INFO L482 AbstractCegarLoop]: Abstraction has 27213 states and 85722 transitions. [2021-06-05 04:00:03,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:03,471 INFO L276 IsEmpty]: Start isEmpty. Operand 27213 states and 85722 transitions. [2021-06-05 04:00:03,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:00:03,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:03,509 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:03,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable965,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:03,710 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:03,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:03,710 INFO L82 PathProgramCache]: Analyzing trace with hash -2084429165, now seen corresponding path program 521 times [2021-06-05 04:00:03,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:03,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259535965] [2021-06-05 04:00:03,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:03,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:03,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259535965] [2021-06-05 04:00:03,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259535965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:03,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626162969] [2021-06-05 04:00:03,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:03,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:00:03,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:03,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:00:03,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:03,968 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:03,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626162969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:03,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:03,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2021-06-05 04:00:03,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462391770] [2021-06-05 04:00:03,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:00:03,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:03,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:00:03,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:00:03,969 INFO L87 Difference]: Start difference. First operand 27213 states and 85722 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:05,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:05,443 INFO L93 Difference]: Finished difference Result 28228 states and 87728 transitions. [2021-06-05 04:00:05,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 04:00:05,443 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:00:05,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:05,500 INFO L225 Difference]: With dead ends: 28228 [2021-06-05 04:00:05,500 INFO L226 Difference]: Without dead ends: 28220 [2021-06-05 04:00:05,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3652 ImplicationChecksByTransitivity, 1107.0ms TimeCoverageRelationStatistics Valid=4157, Invalid=8499, Unknown=0, NotChecked=0, Total=12656 [2021-06-05 04:00:05,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28220 states. [2021-06-05 04:00:05,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28220 to 27255. [2021-06-05 04:00:05,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27255 states, 27254 states have (on average 3.149262493578924) internal successors, (85830), 27254 states have internal predecessors, (85830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:06,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27255 states to 27255 states and 85830 transitions. [2021-06-05 04:00:06,024 INFO L78 Accepts]: Start accepts. Automaton has 27255 states and 85830 transitions. Word has length 26 [2021-06-05 04:00:06,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:06,024 INFO L482 AbstractCegarLoop]: Abstraction has 27255 states and 85830 transitions. [2021-06-05 04:00:06,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:06,024 INFO L276 IsEmpty]: Start isEmpty. Operand 27255 states and 85830 transitions. [2021-06-05 04:00:06,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:00:06,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:06,067 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:06,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable966,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:06,282 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:06,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:06,282 INFO L82 PathProgramCache]: Analyzing trace with hash 2019073995, now seen corresponding path program 522 times [2021-06-05 04:00:06,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:06,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008811077] [2021-06-05 04:00:06,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:06,347 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:06,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:06,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008811077] [2021-06-05 04:00:06,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008811077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:06,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035225450] [2021-06-05 04:00:06,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:06,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 04:00:06,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:06,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:00:06,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:06,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035225450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:06,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:06,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-06-05 04:00:06,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239853685] [2021-06-05 04:00:06,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:00:06,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:06,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:00:06,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:00:06,505 INFO L87 Difference]: Start difference. First operand 27255 states and 85830 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:07,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:07,731 INFO L93 Difference]: Finished difference Result 30687 states and 95027 transitions. [2021-06-05 04:00:07,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 04:00:07,732 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:00:07,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:07,785 INFO L225 Difference]: With dead ends: 30687 [2021-06-05 04:00:07,785 INFO L226 Difference]: Without dead ends: 30660 [2021-06-05 04:00:07,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2454 ImplicationChecksByTransitivity, 924.8ms TimeCoverageRelationStatistics Valid=3241, Invalid=6071, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 04:00:07,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30660 states. [2021-06-05 04:00:08,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30660 to 28569. [2021-06-05 04:00:08,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28569 states, 28568 states have (on average 3.1633646037524503) internal successors, (90371), 28568 states have internal predecessors, (90371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:08,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28569 states to 28569 states and 90371 transitions. [2021-06-05 04:00:08,330 INFO L78 Accepts]: Start accepts. Automaton has 28569 states and 90371 transitions. Word has length 26 [2021-06-05 04:00:08,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:08,330 INFO L482 AbstractCegarLoop]: Abstraction has 28569 states and 90371 transitions. [2021-06-05 04:00:08,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:08,330 INFO L276 IsEmpty]: Start isEmpty. Operand 28569 states and 90371 transitions. [2021-06-05 04:00:08,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:00:08,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:08,370 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:08,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable967 [2021-06-05 04:00:08,570 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:08,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:08,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1554482891, now seen corresponding path program 523 times [2021-06-05 04:00:08,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:08,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114555419] [2021-06-05 04:00:08,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:08,630 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:08,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:08,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114555419] [2021-06-05 04:00:08,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114555419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:08,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740184866] [2021-06-05 04:00:08,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:08,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:00:08,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:08,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740184866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:08,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:08,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-06-05 04:00:08,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846900306] [2021-06-05 04:00:08,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:00:08,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:08,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:00:08,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:00:08,785 INFO L87 Difference]: Start difference. First operand 28569 states and 90371 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:10,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:10,220 INFO L93 Difference]: Finished difference Result 29868 states and 92929 transitions. [2021-06-05 04:00:10,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 04:00:10,220 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:00:10,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:10,264 INFO L225 Difference]: With dead ends: 29868 [2021-06-05 04:00:10,264 INFO L226 Difference]: Without dead ends: 29858 [2021-06-05 04:00:10,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3705 ImplicationChecksByTransitivity, 1186.8ms TimeCoverageRelationStatistics Valid=4143, Invalid=8967, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 04:00:10,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29858 states. [2021-06-05 04:00:10,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29858 to 26993. [2021-06-05 04:00:10,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26993 states, 26992 states have (on average 3.147191760521636) internal successors, (84949), 26992 states have internal predecessors, (84949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:10,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26993 states to 26993 states and 84949 transitions. [2021-06-05 04:00:10,709 INFO L78 Accepts]: Start accepts. Automaton has 26993 states and 84949 transitions. Word has length 26 [2021-06-05 04:00:10,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:10,709 INFO L482 AbstractCegarLoop]: Abstraction has 26993 states and 84949 transitions. [2021-06-05 04:00:10,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:10,709 INFO L276 IsEmpty]: Start isEmpty. Operand 26993 states and 84949 transitions. [2021-06-05 04:00:10,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:00:10,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:10,743 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:10,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable968,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:10,944 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:10,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:10,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1520883663, now seen corresponding path program 524 times [2021-06-05 04:00:10,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:10,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766602416] [2021-06-05 04:00:10,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:11,014 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:11,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:11,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766602416] [2021-06-05 04:00:11,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766602416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:11,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764232935] [2021-06-05 04:00:11,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:11,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:00:11,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:11,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:00:11,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:11,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764232935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:11,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:11,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 26 [2021-06-05 04:00:11,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089704725] [2021-06-05 04:00:11,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:00:11,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:11,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:00:11,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:00:11,185 INFO L87 Difference]: Start difference. First operand 26993 states and 84949 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:12,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:12,522 INFO L93 Difference]: Finished difference Result 28470 states and 88158 transitions. [2021-06-05 04:00:12,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 04:00:12,523 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:00:12,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:12,577 INFO L225 Difference]: With dead ends: 28470 [2021-06-05 04:00:12,577 INFO L226 Difference]: Without dead ends: 28450 [2021-06-05 04:00:12,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3782 ImplicationChecksByTransitivity, 1114.5ms TimeCoverageRelationStatistics Valid=4019, Invalid=8863, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 04:00:12,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28450 states. [2021-06-05 04:00:12,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28450 to 26539. [2021-06-05 04:00:13,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26539 states, 26538 states have (on average 3.1459416685507575) internal successors, (83487), 26538 states have internal predecessors, (83487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:13,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26539 states to 26539 states and 83487 transitions. [2021-06-05 04:00:13,077 INFO L78 Accepts]: Start accepts. Automaton has 26539 states and 83487 transitions. Word has length 26 [2021-06-05 04:00:13,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:13,077 INFO L482 AbstractCegarLoop]: Abstraction has 26539 states and 83487 transitions. [2021-06-05 04:00:13,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:13,077 INFO L276 IsEmpty]: Start isEmpty. Operand 26539 states and 83487 transitions. [2021-06-05 04:00:13,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:00:13,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:13,114 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:13,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable969 [2021-06-05 04:00:13,329 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:13,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:13,329 INFO L82 PathProgramCache]: Analyzing trace with hash 479307595, now seen corresponding path program 525 times [2021-06-05 04:00:13,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:13,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083176414] [2021-06-05 04:00:13,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:13,410 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:13,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:13,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083176414] [2021-06-05 04:00:13,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083176414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:13,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790893870] [2021-06-05 04:00:13,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:13,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 04:00:13,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:13,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:00:13,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:13,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790893870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:13,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:13,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2021-06-05 04:00:13,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287309334] [2021-06-05 04:00:13,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 04:00:13,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:13,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 04:00:13,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:00:13,601 INFO L87 Difference]: Start difference. First operand 26539 states and 83487 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:14,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:14,972 INFO L93 Difference]: Finished difference Result 27713 states and 85920 transitions. [2021-06-05 04:00:14,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-05 04:00:14,976 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:00:14,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:15,025 INFO L225 Difference]: With dead ends: 27713 [2021-06-05 04:00:15,025 INFO L226 Difference]: Without dead ends: 27701 [2021-06-05 04:00:15,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3898 ImplicationChecksByTransitivity, 1133.4ms TimeCoverageRelationStatistics Valid=4022, Invalid=8860, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 04:00:15,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27701 states. [2021-06-05 04:00:15,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27701 to 26577. [2021-06-05 04:00:15,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26577 states, 26576 states have (on average 3.145996387718242) internal successors, (83608), 26576 states have internal predecessors, (83608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:15,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26577 states to 26577 states and 83608 transitions. [2021-06-05 04:00:15,558 INFO L78 Accepts]: Start accepts. Automaton has 26577 states and 83608 transitions. Word has length 26 [2021-06-05 04:00:15,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:15,558 INFO L482 AbstractCegarLoop]: Abstraction has 26577 states and 83608 transitions. [2021-06-05 04:00:15,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:15,558 INFO L276 IsEmpty]: Start isEmpty. Operand 26577 states and 83608 transitions. [2021-06-05 04:00:15,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:00:15,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:15,604 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:15,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 529 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable970 [2021-06-05 04:00:15,804 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:15,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:15,804 INFO L82 PathProgramCache]: Analyzing trace with hash 2114621967, now seen corresponding path program 526 times [2021-06-05 04:00:15,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:15,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86416052] [2021-06-05 04:00:15,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:15,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:15,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86416052] [2021-06-05 04:00:15,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86416052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:15,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273131205] [2021-06-05 04:00:15,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:15,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:00:15,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:15,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:00:15,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:16,032 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:16,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273131205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:16,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:16,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 25 [2021-06-05 04:00:16,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270200596] [2021-06-05 04:00:16,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:00:16,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:16,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:00:16,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:00:16,033 INFO L87 Difference]: Start difference. First operand 26577 states and 83608 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:17,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:17,349 INFO L93 Difference]: Finished difference Result 30369 states and 93818 transitions. [2021-06-05 04:00:17,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 04:00:17,350 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:00:17,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:17,412 INFO L225 Difference]: With dead ends: 30369 [2021-06-05 04:00:17,412 INFO L226 Difference]: Without dead ends: 30345 [2021-06-05 04:00:17,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2331 ImplicationChecksByTransitivity, 1018.1ms TimeCoverageRelationStatistics Valid=3114, Invalid=5816, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 04:00:17,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30345 states. [2021-06-05 04:00:17,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30345 to 27835. [2021-06-05 04:00:17,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27835 states, 27834 states have (on average 3.158906373500036) internal successors, (87925), 27834 states have internal predecessors, (87925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:17,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27835 states to 27835 states and 87925 transitions. [2021-06-05 04:00:17,981 INFO L78 Accepts]: Start accepts. Automaton has 27835 states and 87925 transitions. Word has length 26 [2021-06-05 04:00:17,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:17,981 INFO L482 AbstractCegarLoop]: Abstraction has 27835 states and 87925 transitions. [2021-06-05 04:00:17,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:17,981 INFO L276 IsEmpty]: Start isEmpty. Operand 27835 states and 87925 transitions. [2021-06-05 04:00:18,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:00:18,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:18,027 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:18,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable971,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:18,245 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:18,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:18,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1650030863, now seen corresponding path program 527 times [2021-06-05 04:00:18,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:18,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023452593] [2021-06-05 04:00:18,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:18,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:18,313 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:18,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:18,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023452593] [2021-06-05 04:00:18,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023452593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:18,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391997563] [2021-06-05 04:00:18,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:18,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:00:18,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:18,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:00:18,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:18,490 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:18,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391997563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:18,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:18,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 25 [2021-06-05 04:00:18,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868822340] [2021-06-05 04:00:18,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:00:18,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:18,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:00:18,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:00:18,491 INFO L87 Difference]: Start difference. First operand 27835 states and 87925 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:20,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:20,008 INFO L93 Difference]: Finished difference Result 29357 states and 91107 transitions. [2021-06-05 04:00:20,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-05 04:00:20,017 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:00:20,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:20,074 INFO L225 Difference]: With dead ends: 29357 [2021-06-05 04:00:20,074 INFO L226 Difference]: Without dead ends: 29349 [2021-06-05 04:00:20,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4263 ImplicationChecksByTransitivity, 1257.0ms TimeCoverageRelationStatistics Valid=4352, Invalid=9928, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 04:00:20,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29349 states. [2021-06-05 04:00:20,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29349 to 26847. [2021-06-05 04:00:20,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26847 states, 26846 states have (on average 3.1492959845042092) internal successors, (84546), 26846 states have internal predecessors, (84546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:20,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26847 states to 26847 states and 84546 transitions. [2021-06-05 04:00:20,747 INFO L78 Accepts]: Start accepts. Automaton has 26847 states and 84546 transitions. Word has length 26 [2021-06-05 04:00:20,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:20,747 INFO L482 AbstractCegarLoop]: Abstraction has 26847 states and 84546 transitions. [2021-06-05 04:00:20,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:20,747 INFO L276 IsEmpty]: Start isEmpty. Operand 26847 states and 84546 transitions. [2021-06-05 04:00:20,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:00:20,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:20,785 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:21,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable972 [2021-06-05 04:00:21,002 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:21,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:21,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1616431635, now seen corresponding path program 528 times [2021-06-05 04:00:21,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:21,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142738101] [2021-06-05 04:00:21,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:21,069 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:21,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:21,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142738101] [2021-06-05 04:00:21,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142738101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:21,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279181695] [2021-06-05 04:00:21,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:21,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:00:21,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:21,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:00:21,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:21,258 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 24 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:21,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279181695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:21,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:21,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 26 [2021-06-05 04:00:21,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236012611] [2021-06-05 04:00:21,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:00:21,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:21,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:00:21,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:00:21,259 INFO L87 Difference]: Start difference. First operand 26847 states and 84546 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:22,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:22,803 INFO L93 Difference]: Finished difference Result 28643 states and 88679 transitions. [2021-06-05 04:00:22,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 04:00:22,804 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:00:22,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:22,851 INFO L225 Difference]: With dead ends: 28643 [2021-06-05 04:00:22,851 INFO L226 Difference]: Without dead ends: 28631 [2021-06-05 04:00:22,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4099 ImplicationChecksByTransitivity, 1305.5ms TimeCoverageRelationStatistics Valid=4043, Invalid=9529, Unknown=0, NotChecked=0, Total=13572 [2021-06-05 04:00:22,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28631 states. [2021-06-05 04:00:23,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28631 to 26673. [2021-06-05 04:00:23,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26673 states, 26672 states have (on average 3.1486577684463106) internal successors, (83981), 26672 states have internal predecessors, (83981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:23,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26673 states to 26673 states and 83981 transitions. [2021-06-05 04:00:23,357 INFO L78 Accepts]: Start accepts. Automaton has 26673 states and 83981 transitions. Word has length 26 [2021-06-05 04:00:23,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:23,357 INFO L482 AbstractCegarLoop]: Abstraction has 26673 states and 83981 transitions. [2021-06-05 04:00:23,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:23,357 INFO L276 IsEmpty]: Start isEmpty. Operand 26673 states and 83981 transitions. [2021-06-05 04:00:23,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:00:23,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:23,397 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:23,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable973,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:23,597 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:23,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:23,597 INFO L82 PathProgramCache]: Analyzing trace with hash 574855567, now seen corresponding path program 529 times [2021-06-05 04:00:23,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:23,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756980282] [2021-06-05 04:00:23,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:23,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:23,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756980282] [2021-06-05 04:00:23,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756980282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:23,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760905845] [2021-06-05 04:00:23,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:23,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:00:23,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:23,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760905845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:23,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:23,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 27 [2021-06-05 04:00:23,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84699292] [2021-06-05 04:00:23,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 04:00:23,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:23,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 04:00:23,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:00:23,847 INFO L87 Difference]: Start difference. First operand 26673 states and 83981 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:25,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:25,205 INFO L93 Difference]: Finished difference Result 28561 states and 88437 transitions. [2021-06-05 04:00:25,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 04:00:25,205 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:00:25,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:25,249 INFO L225 Difference]: With dead ends: 28561 [2021-06-05 04:00:25,249 INFO L226 Difference]: Without dead ends: 28537 [2021-06-05 04:00:25,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4073 ImplicationChecksByTransitivity, 1136.8ms TimeCoverageRelationStatistics Valid=3869, Invalid=9241, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 04:00:25,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28537 states. [2021-06-05 04:00:25,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28537 to 26427. [2021-06-05 04:00:25,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26427 states, 26426 states have (on average 3.1503821993491257) internal successors, (83252), 26426 states have internal predecessors, (83252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26427 states to 26427 states and 83252 transitions. [2021-06-05 04:00:25,715 INFO L78 Accepts]: Start accepts. Automaton has 26427 states and 83252 transitions. Word has length 26 [2021-06-05 04:00:25,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:25,715 INFO L482 AbstractCegarLoop]: Abstraction has 26427 states and 83252 transitions. [2021-06-05 04:00:25,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:25,715 INFO L276 IsEmpty]: Start isEmpty. Operand 26427 states and 83252 transitions. [2021-06-05 04:00:25,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:00:25,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:25,752 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:25,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable974 [2021-06-05 04:00:25,952 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:25,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:25,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1649231469, now seen corresponding path program 530 times [2021-06-05 04:00:25,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:25,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554838691] [2021-06-05 04:00:25,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:26,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:26,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554838691] [2021-06-05 04:00:26,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554838691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:26,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374992776] [2021-06-05 04:00:26,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:26,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:00:26,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:26,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:00:26,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:26,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374992776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:26,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:26,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-06-05 04:00:26,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928842151] [2021-06-05 04:00:26,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 04:00:26,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:26,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 04:00:26,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:00:26,340 INFO L87 Difference]: Start difference. First operand 26427 states and 83252 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:27,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:27,554 INFO L93 Difference]: Finished difference Result 27859 states and 86438 transitions. [2021-06-05 04:00:27,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 04:00:27,555 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:00:27,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:27,607 INFO L225 Difference]: With dead ends: 27859 [2021-06-05 04:00:27,607 INFO L226 Difference]: Without dead ends: 27843 [2021-06-05 04:00:27,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4034 ImplicationChecksByTransitivity, 1166.8ms TimeCoverageRelationStatistics Valid=3820, Invalid=9062, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 04:00:27,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27843 states. [2021-06-05 04:00:28,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27843 to 26477. [2021-06-05 04:00:28,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26477 states, 26476 states have (on average 3.1508536032633327) internal successors, (83422), 26476 states have internal predecessors, (83422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:28,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26477 states to 26477 states and 83422 transitions. [2021-06-05 04:00:28,118 INFO L78 Accepts]: Start accepts. Automaton has 26477 states and 83422 transitions. Word has length 26 [2021-06-05 04:00:28,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:28,118 INFO L482 AbstractCegarLoop]: Abstraction has 26477 states and 83422 transitions. [2021-06-05 04:00:28,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:28,118 INFO L276 IsEmpty]: Start isEmpty. Operand 26477 states and 83422 transitions. [2021-06-05 04:00:28,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:00:28,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:28,157 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:28,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable975,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:28,373 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:28,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:28,373 INFO L82 PathProgramCache]: Analyzing trace with hash 781641803, now seen corresponding path program 531 times [2021-06-05 04:00:28,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:28,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119555818] [2021-06-05 04:00:28,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:28,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:28,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119555818] [2021-06-05 04:00:28,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119555818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:28,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765355413] [2021-06-05 04:00:28,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:28,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:00:28,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:28,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:00:28,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:28,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765355413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:28,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:28,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 25 [2021-06-05 04:00:28,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226771735] [2021-06-05 04:00:28,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:00:28,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:28,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:00:28,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:00:28,611 INFO L87 Difference]: Start difference. First operand 26477 states and 83422 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:29,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:29,726 INFO L93 Difference]: Finished difference Result 30895 states and 95482 transitions. [2021-06-05 04:00:29,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 04:00:29,726 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:00:29,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:29,777 INFO L225 Difference]: With dead ends: 30895 [2021-06-05 04:00:29,777 INFO L226 Difference]: Without dead ends: 30874 [2021-06-05 04:00:29,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2249 ImplicationChecksByTransitivity, 874.1ms TimeCoverageRelationStatistics Valid=2988, Invalid=5568, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 04:00:29,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30874 states. [2021-06-05 04:00:30,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30874 to 27557. [2021-06-05 04:00:30,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27557 states, 27556 states have (on average 3.16014661053854) internal successors, (87081), 27556 states have internal predecessors, (87081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:30,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27557 states to 27557 states and 87081 transitions. [2021-06-05 04:00:30,316 INFO L78 Accepts]: Start accepts. Automaton has 27557 states and 87081 transitions. Word has length 26 [2021-06-05 04:00:30,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:30,316 INFO L482 AbstractCegarLoop]: Abstraction has 27557 states and 87081 transitions. [2021-06-05 04:00:30,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:30,316 INFO L276 IsEmpty]: Start isEmpty. Operand 27557 states and 87081 transitions. [2021-06-05 04:00:30,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:00:30,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:30,353 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:30,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable976 [2021-06-05 04:00:30,554 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:30,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:30,554 INFO L82 PathProgramCache]: Analyzing trace with hash 317050699, now seen corresponding path program 532 times [2021-06-05 04:00:30,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:30,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404767880] [2021-06-05 04:00:30,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:30,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:30,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404767880] [2021-06-05 04:00:30,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404767880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:30,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907080376] [2021-06-05 04:00:30,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:30,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:00:30,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:30,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:00:30,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 24 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:30,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907080376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:30,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:30,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 25 [2021-06-05 04:00:30,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97492273] [2021-06-05 04:00:30,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:00:30,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:30,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:00:30,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:00:30,758 INFO L87 Difference]: Start difference. First operand 27557 states and 87081 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:32,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:32,265 INFO L93 Difference]: Finished difference Result 29430 states and 91212 transitions. [2021-06-05 04:00:32,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 04:00:32,276 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:00:32,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:32,327 INFO L225 Difference]: With dead ends: 29430 [2021-06-05 04:00:32,327 INFO L226 Difference]: Without dead ends: 29424 [2021-06-05 04:00:32,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5160 ImplicationChecksByTransitivity, 1206.1ms TimeCoverageRelationStatistics Valid=4713, Invalid=11289, Unknown=0, NotChecked=0, Total=16002 [2021-06-05 04:00:32,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29424 states. [2021-06-05 04:00:32,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29424 to 27158. [2021-06-05 04:00:32,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27158 states, 27157 states have (on average 3.156165997716979) internal successors, (85712), 27157 states have internal predecessors, (85712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:32,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27158 states to 27158 states and 85712 transitions. [2021-06-05 04:00:32,808 INFO L78 Accepts]: Start accepts. Automaton has 27158 states and 85712 transitions. Word has length 26 [2021-06-05 04:00:32,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:32,808 INFO L482 AbstractCegarLoop]: Abstraction has 27158 states and 85712 transitions. [2021-06-05 04:00:32,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:32,809 INFO L276 IsEmpty]: Start isEmpty. Operand 27158 states and 85712 transitions. [2021-06-05 04:00:32,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:00:32,844 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:32,844 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:33,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable977 [2021-06-05 04:00:33,044 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:33,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:33,045 INFO L82 PathProgramCache]: Analyzing trace with hash 283451471, now seen corresponding path program 533 times [2021-06-05 04:00:33,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:33,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155024964] [2021-06-05 04:00:33,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:33,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:33,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155024964] [2021-06-05 04:00:33,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155024964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:33,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303555603] [2021-06-05 04:00:33,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:33,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:00:33,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:33,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:00:33,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:33,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303555603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:33,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:33,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2021-06-05 04:00:33,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239232012] [2021-06-05 04:00:33,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:00:33,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:33,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:00:33,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:00:33,266 INFO L87 Difference]: Start difference. First operand 27158 states and 85712 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:34,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:34,837 INFO L93 Difference]: Finished difference Result 29381 states and 91072 transitions. [2021-06-05 04:00:34,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-05 04:00:34,838 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:00:34,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:34,887 INFO L225 Difference]: With dead ends: 29381 [2021-06-05 04:00:34,888 INFO L226 Difference]: Without dead ends: 29371 [2021-06-05 04:00:34,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4715 ImplicationChecksByTransitivity, 1279.4ms TimeCoverageRelationStatistics Valid=4224, Invalid=10538, Unknown=0, NotChecked=0, Total=14762 [2021-06-05 04:00:34,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29371 states. [2021-06-05 04:00:35,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29371 to 27039. [2021-06-05 04:00:35,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27039 states, 27038 states have (on average 3.1556328130778906) internal successors, (85322), 27038 states have internal predecessors, (85322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:35,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27039 states to 27039 states and 85322 transitions. [2021-06-05 04:00:35,419 INFO L78 Accepts]: Start accepts. Automaton has 27039 states and 85322 transitions. Word has length 26 [2021-06-05 04:00:35,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:35,419 INFO L482 AbstractCegarLoop]: Abstraction has 27039 states and 85322 transitions. [2021-06-05 04:00:35,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:35,419 INFO L276 IsEmpty]: Start isEmpty. Operand 27039 states and 85322 transitions. [2021-06-05 04:00:35,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:00:35,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:35,459 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:35,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable978,537 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:35,659 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:35,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:35,660 INFO L82 PathProgramCache]: Analyzing trace with hash -758124597, now seen corresponding path program 534 times [2021-06-05 04:00:35,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:35,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357200514] [2021-06-05 04:00:35,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:35,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:35,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:35,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357200514] [2021-06-05 04:00:35,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357200514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:35,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348623657] [2021-06-05 04:00:35,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:35,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:00:35,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:35,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:00:35,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:35,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348623657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:35,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:35,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-06-05 04:00:35,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023179905] [2021-06-05 04:00:35,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 04:00:35,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:35,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 04:00:35,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:00:35,890 INFO L87 Difference]: Start difference. First operand 27039 states and 85322 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:37,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:37,435 INFO L93 Difference]: Finished difference Result 29421 states and 91215 transitions. [2021-06-05 04:00:37,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 04:00:37,435 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:00:37,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:37,489 INFO L225 Difference]: With dead ends: 29421 [2021-06-05 04:00:37,489 INFO L226 Difference]: Without dead ends: 29407 [2021-06-05 04:00:37,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4430 ImplicationChecksByTransitivity, 1290.3ms TimeCoverageRelationStatistics Valid=3872, Invalid=9934, Unknown=0, NotChecked=0, Total=13806 [2021-06-05 04:00:37,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29407 states. [2021-06-05 04:00:37,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29407 to 27188. [2021-06-05 04:00:37,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27188 states, 27187 states have (on average 3.1570235774451025) internal successors, (85830), 27187 states have internal predecessors, (85830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:38,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27188 states to 27188 states and 85830 transitions. [2021-06-05 04:00:38,011 INFO L78 Accepts]: Start accepts. Automaton has 27188 states and 85830 transitions. Word has length 26 [2021-06-05 04:00:38,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:38,011 INFO L482 AbstractCegarLoop]: Abstraction has 27188 states and 85830 transitions. [2021-06-05 04:00:38,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:38,011 INFO L276 IsEmpty]: Start isEmpty. Operand 27188 states and 85830 transitions. [2021-06-05 04:00:38,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:00:38,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:38,049 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:38,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable979 [2021-06-05 04:00:38,249 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:38,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:38,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1312755663, now seen corresponding path program 535 times [2021-06-05 04:00:38,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:38,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090772442] [2021-06-05 04:00:38,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:38,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:38,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:38,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090772442] [2021-06-05 04:00:38,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090772442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:38,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556682148] [2021-06-05 04:00:38,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:38,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:38,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:00:38,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:38,488 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 24 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:38,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556682148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:38,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:38,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-06-05 04:00:38,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114410138] [2021-06-05 04:00:38,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 04:00:38,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:38,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 04:00:38,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:00:38,489 INFO L87 Difference]: Start difference. First operand 27188 states and 85830 transitions. Second operand has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:39,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:39,837 INFO L93 Difference]: Finished difference Result 29725 states and 92236 transitions. [2021-06-05 04:00:39,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-05 04:00:39,846 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:00:39,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:39,896 INFO L225 Difference]: With dead ends: 29725 [2021-06-05 04:00:39,897 INFO L226 Difference]: Without dead ends: 29701 [2021-06-05 04:00:39,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4264 ImplicationChecksByTransitivity, 1129.1ms TimeCoverageRelationStatistics Valid=3652, Invalid=9458, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 04:00:39,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29701 states. [2021-06-05 04:00:40,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29701 to 27357. [2021-06-05 04:00:40,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27357 states, 27356 states have (on average 3.1610615587074133) internal successors, (86474), 27356 states have internal predecessors, (86474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:40,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27357 states to 27357 states and 86474 transitions. [2021-06-05 04:00:40,380 INFO L78 Accepts]: Start accepts. Automaton has 27357 states and 86474 transitions. Word has length 26 [2021-06-05 04:00:40,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:40,380 INFO L482 AbstractCegarLoop]: Abstraction has 27357 states and 86474 transitions. [2021-06-05 04:00:40,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:40,381 INFO L276 IsEmpty]: Start isEmpty. Operand 27357 states and 86474 transitions. [2021-06-05 04:00:40,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:00:40,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:40,417 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:40,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 539 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable980 [2021-06-05 04:00:40,618 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:40,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:40,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1085534283, now seen corresponding path program 536 times [2021-06-05 04:00:40,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:40,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558450445] [2021-06-05 04:00:40,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:40,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:40,695 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:40,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:40,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558450445] [2021-06-05 04:00:40,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558450445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:40,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353195686] [2021-06-05 04:00:40,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:40,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:00:40,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:40,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:00:40,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:40,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353195686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:40,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:40,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-06-05 04:00:40,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586144742] [2021-06-05 04:00:40,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 04:00:40,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:40,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 04:00:40,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:00:40,872 INFO L87 Difference]: Start difference. First operand 27357 states and 86474 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:42,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:42,029 INFO L93 Difference]: Finished difference Result 29174 states and 90761 transitions. [2021-06-05 04:00:42,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 04:00:42,030 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:00:42,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:42,073 INFO L225 Difference]: With dead ends: 29174 [2021-06-05 04:00:42,073 INFO L226 Difference]: Without dead ends: 29154 [2021-06-05 04:00:42,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4062 ImplicationChecksByTransitivity, 1019.7ms TimeCoverageRelationStatistics Valid=3559, Invalid=9097, Unknown=0, NotChecked=0, Total=12656 [2021-06-05 04:00:42,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29154 states. [2021-06-05 04:00:42,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29154 to 27401. [2021-06-05 04:00:42,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27401 states, 27400 states have (on average 3.1614963503649633) internal successors, (86625), 27400 states have internal predecessors, (86625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:42,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27401 states to 27401 states and 86625 transitions. [2021-06-05 04:00:42,636 INFO L78 Accepts]: Start accepts. Automaton has 27401 states and 86625 transitions. Word has length 26 [2021-06-05 04:00:42,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:42,636 INFO L482 AbstractCegarLoop]: Abstraction has 27401 states and 86625 transitions. [2021-06-05 04:00:42,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:42,636 INFO L276 IsEmpty]: Start isEmpty. Operand 27401 states and 86625 transitions. [2021-06-05 04:00:42,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:00:42,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:42,673 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:42,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable981,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:42,873 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:42,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:42,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1886037617, now seen corresponding path program 537 times [2021-06-05 04:00:42,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:42,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302719151] [2021-06-05 04:00:42,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:42,918 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:42,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:42,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302719151] [2021-06-05 04:00:42,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302719151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:42,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189099315] [2021-06-05 04:00:42,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:42,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:00:42,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:42,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:00:42,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:43,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189099315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:43,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:43,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 25 [2021-06-05 04:00:43,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126451562] [2021-06-05 04:00:43,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:00:43,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:43,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:00:43,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:00:43,085 INFO L87 Difference]: Start difference. First operand 27401 states and 86625 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:44,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:44,224 INFO L93 Difference]: Finished difference Result 33346 states and 103495 transitions. [2021-06-05 04:00:44,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 04:00:44,224 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:00:44,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:44,280 INFO L225 Difference]: With dead ends: 33346 [2021-06-05 04:00:44,280 INFO L226 Difference]: Without dead ends: 33328 [2021-06-05 04:00:44,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2219 ImplicationChecksByTransitivity, 879.7ms TimeCoverageRelationStatistics Valid=2839, Invalid=5351, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 04:00:44,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33328 states. [2021-06-05 04:00:44,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33328 to 30042. [2021-06-05 04:00:44,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30042 states, 30041 states have (on average 3.181385439898805) internal successors, (95572), 30041 states have internal predecessors, (95572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:44,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30042 states to 30042 states and 95572 transitions. [2021-06-05 04:00:44,875 INFO L78 Accepts]: Start accepts. Automaton has 30042 states and 95572 transitions. Word has length 26 [2021-06-05 04:00:44,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:44,875 INFO L482 AbstractCegarLoop]: Abstraction has 30042 states and 95572 transitions. [2021-06-05 04:00:44,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:44,876 INFO L276 IsEmpty]: Start isEmpty. Operand 30042 states and 95572 transitions. [2021-06-05 04:00:44,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:00:44,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:44,916 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:45,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable982 [2021-06-05 04:00:45,117 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:45,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:45,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1944338575, now seen corresponding path program 538 times [2021-06-05 04:00:45,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:45,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705865817] [2021-06-05 04:00:45,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:45,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:45,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:45,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705865817] [2021-06-05 04:00:45,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705865817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:45,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935193462] [2021-06-05 04:00:45,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:45,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:00:45,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:45,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:00:45,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:45,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935193462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:45,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:45,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 25 [2021-06-05 04:00:45,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968806360] [2021-06-05 04:00:45,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:00:45,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:45,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:00:45,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:00:45,336 INFO L87 Difference]: Start difference. First operand 30042 states and 95572 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:47,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:47,149 INFO L93 Difference]: Finished difference Result 32560 states and 101433 transitions. [2021-06-05 04:00:47,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-06-05 04:00:47,149 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:00:47,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:47,206 INFO L225 Difference]: With dead ends: 32560 [2021-06-05 04:00:47,207 INFO L226 Difference]: Without dead ends: 32554 [2021-06-05 04:00:47,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6452 ImplicationChecksByTransitivity, 1497.4ms TimeCoverageRelationStatistics Valid=5189, Invalid=13171, Unknown=0, NotChecked=0, Total=18360 [2021-06-05 04:00:47,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32554 states. [2021-06-05 04:00:47,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32554 to 29608. [2021-06-05 04:00:47,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29608 states, 29607 states have (on average 3.1779646705171074) internal successors, (94090), 29607 states have internal predecessors, (94090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:47,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29608 states to 29608 states and 94090 transitions. [2021-06-05 04:00:47,836 INFO L78 Accepts]: Start accepts. Automaton has 29608 states and 94090 transitions. Word has length 26 [2021-06-05 04:00:47,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:47,836 INFO L482 AbstractCegarLoop]: Abstraction has 29608 states and 94090 transitions. [2021-06-05 04:00:47,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:47,836 INFO L276 IsEmpty]: Start isEmpty. Operand 29608 states and 94090 transitions. [2021-06-05 04:00:47,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:00:47,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:47,878 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:48,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 542 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable983 [2021-06-05 04:00:48,089 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:48,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:48,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1910739347, now seen corresponding path program 539 times [2021-06-05 04:00:48,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:48,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787012252] [2021-06-05 04:00:48,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:48,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:48,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787012252] [2021-06-05 04:00:48,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787012252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:48,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970380707] [2021-06-05 04:00:48,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:48,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:00:48,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:48,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:00:48,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:48,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970380707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:48,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:48,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 26 [2021-06-05 04:00:48,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319721533] [2021-06-05 04:00:48,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:00:48,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:48,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:00:48,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:00:48,308 INFO L87 Difference]: Start difference. First operand 29608 states and 94090 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:49,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:49,982 INFO L93 Difference]: Finished difference Result 32780 states and 102273 transitions. [2021-06-05 04:00:49,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 04:00:49,983 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:00:49,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:50,041 INFO L225 Difference]: With dead ends: 32780 [2021-06-05 04:00:50,041 INFO L226 Difference]: Without dead ends: 32772 [2021-06-05 04:00:50,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5696 ImplicationChecksByTransitivity, 1386.2ms TimeCoverageRelationStatistics Valid=4538, Invalid=11974, Unknown=0, NotChecked=0, Total=16512 [2021-06-05 04:00:50,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32772 states. [2021-06-05 04:00:50,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32772 to 29830. [2021-06-05 04:00:50,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29830 states, 29829 states have (on average 3.1797244292467064) internal successors, (94848), 29829 states have internal predecessors, (94848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:50,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29830 states to 29830 states and 94848 transitions. [2021-06-05 04:00:50,568 INFO L78 Accepts]: Start accepts. Automaton has 29830 states and 94848 transitions. Word has length 26 [2021-06-05 04:00:50,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:50,568 INFO L482 AbstractCegarLoop]: Abstraction has 29830 states and 94848 transitions. [2021-06-05 04:00:50,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:50,568 INFO L276 IsEmpty]: Start isEmpty. Operand 29830 states and 94848 transitions. [2021-06-05 04:00:50,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:00:50,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:50,609 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:50,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable984 [2021-06-05 04:00:50,810 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:50,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:50,810 INFO L82 PathProgramCache]: Analyzing trace with hash 869163279, now seen corresponding path program 540 times [2021-06-05 04:00:50,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:50,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448104106] [2021-06-05 04:00:50,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:50,866 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:50,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:50,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448104106] [2021-06-05 04:00:50,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448104106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:50,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666194939] [2021-06-05 04:00:50,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:50,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:00:50,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:50,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:00:50,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:51,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666194939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:51,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:51,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-06-05 04:00:51,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315401749] [2021-06-05 04:00:51,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 04:00:51,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:51,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 04:00:51,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:00:51,035 INFO L87 Difference]: Start difference. First operand 29830 states and 94848 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:52,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:52,457 INFO L93 Difference]: Finished difference Result 33134 states and 103498 transitions. [2021-06-05 04:00:52,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-06-05 04:00:52,458 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:00:52,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:52,513 INFO L225 Difference]: With dead ends: 33134 [2021-06-05 04:00:52,513 INFO L226 Difference]: Without dead ends: 33122 [2021-06-05 04:00:52,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5101 ImplicationChecksByTransitivity, 1204.3ms TimeCoverageRelationStatistics Valid=4017, Invalid=10989, Unknown=0, NotChecked=0, Total=15006 [2021-06-05 04:00:52,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33122 states. [2021-06-05 04:00:53,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33122 to 30107. [2021-06-05 04:00:53,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30107 states, 30106 states have (on average 3.1811931176509667) internal successors, (95773), 30106 states have internal predecessors, (95773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:53,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30107 states to 30107 states and 95773 transitions. [2021-06-05 04:00:53,137 INFO L78 Accepts]: Start accepts. Automaton has 30107 states and 95773 transitions. Word has length 26 [2021-06-05 04:00:53,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:53,138 INFO L482 AbstractCegarLoop]: Abstraction has 30107 states and 95773 transitions. [2021-06-05 04:00:53,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:53,138 INFO L276 IsEmpty]: Start isEmpty. Operand 30107 states and 95773 transitions. [2021-06-05 04:00:53,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:00:53,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:53,181 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:53,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable985,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:53,397 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:53,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:53,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1354923757, now seen corresponding path program 541 times [2021-06-05 04:00:53,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:53,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741612681] [2021-06-05 04:00:53,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:53,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:53,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741612681] [2021-06-05 04:00:53,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741612681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:53,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344095630] [2021-06-05 04:00:53,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:53,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:00:53,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:53,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344095630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:53,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:53,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-06-05 04:00:53,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605314299] [2021-06-05 04:00:53,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 04:00:53,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:53,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 04:00:53,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:00:53,634 INFO L87 Difference]: Start difference. First operand 30107 states and 95773 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:55,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:55,018 INFO L93 Difference]: Finished difference Result 33604 states and 105046 transitions. [2021-06-05 04:00:55,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 04:00:55,018 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:00:55,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:55,069 INFO L225 Difference]: With dead ends: 33604 [2021-06-05 04:00:55,069 INFO L226 Difference]: Without dead ends: 33588 [2021-06-05 04:00:55,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4648 ImplicationChecksByTransitivity, 1168.9ms TimeCoverageRelationStatistics Valid=3628, Invalid=10178, Unknown=0, NotChecked=0, Total=13806 [2021-06-05 04:00:55,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33588 states. [2021-06-05 04:00:55,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33588 to 30921. [2021-06-05 04:00:55,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30921 states, 30920 states have (on average 3.184411384217335) internal successors, (98462), 30920 states have internal predecessors, (98462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:55,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30921 states to 30921 states and 98462 transitions. [2021-06-05 04:00:55,623 INFO L78 Accepts]: Start accepts. Automaton has 30921 states and 98462 transitions. Word has length 26 [2021-06-05 04:00:55,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:55,623 INFO L482 AbstractCegarLoop]: Abstraction has 30921 states and 98462 transitions. [2021-06-05 04:00:55,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:55,623 INFO L276 IsEmpty]: Start isEmpty. Operand 30921 states and 98462 transitions. [2021-06-05 04:00:55,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:00:55,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:55,662 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:55,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable986 [2021-06-05 04:00:55,863 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:55,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:55,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1582145137, now seen corresponding path program 542 times [2021-06-05 04:00:55,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:55,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286751046] [2021-06-05 04:00:55,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:55,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:55,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286751046] [2021-06-05 04:00:55,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286751046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:55,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037935127] [2021-06-05 04:00:55,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:55,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:00:55,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:55,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:00:55,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:56,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037935127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:56,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:56,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-06-05 04:00:56,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437115501] [2021-06-05 04:00:56,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 04:00:56,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:56,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 04:00:56,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:00:56,122 INFO L87 Difference]: Start difference. First operand 30921 states and 98462 transitions. Second operand has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:57,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:57,390 INFO L93 Difference]: Finished difference Result 34622 states and 108395 transitions. [2021-06-05 04:00:57,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 04:00:57,400 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:00:57,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:57,468 INFO L225 Difference]: With dead ends: 34622 [2021-06-05 04:00:57,468 INFO L226 Difference]: Without dead ends: 34602 [2021-06-05 04:00:57,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4330 ImplicationChecksByTransitivity, 1097.0ms TimeCoverageRelationStatistics Valid=3372, Invalid=9510, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 04:00:57,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34602 states. [2021-06-05 04:00:58,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34602 to 31830. [2021-06-05 04:00:58,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31830 states, 31829 states have (on average 3.1889157686386627) internal successors, (101500), 31829 states have internal predecessors, (101500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:58,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31830 states to 31830 states and 101500 transitions. [2021-06-05 04:00:58,110 INFO L78 Accepts]: Start accepts. Automaton has 31830 states and 101500 transitions. Word has length 26 [2021-06-05 04:00:58,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:58,110 INFO L482 AbstractCegarLoop]: Abstraction has 31830 states and 101500 transitions. [2021-06-05 04:00:58,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:58,110 INFO L276 IsEmpty]: Start isEmpty. Operand 31830 states and 101500 transitions. [2021-06-05 04:00:58,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:00:58,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:58,156 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:58,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 546 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable987 [2021-06-05 04:00:58,357 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:58,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:58,357 INFO L82 PathProgramCache]: Analyzing trace with hash -36073325, now seen corresponding path program 543 times [2021-06-05 04:00:58,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:58,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83079819] [2021-06-05 04:00:58,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:58,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:58,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83079819] [2021-06-05 04:00:58,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83079819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:58,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658768774] [2021-06-05 04:00:58,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:58,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:00:58,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:58,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:00:58,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:58,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658768774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:58,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:58,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-06-05 04:00:58,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133734518] [2021-06-05 04:00:58,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 04:00:58,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:58,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 04:00:58,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:00:58,637 INFO L87 Difference]: Start difference. First operand 31830 states and 101500 transitions. Second operand has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:59,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:59,738 INFO L93 Difference]: Finished difference Result 34324 states and 107694 transitions. [2021-06-05 04:00:59,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 04:00:59,739 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:00:59,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:59,793 INFO L225 Difference]: With dead ends: 34324 [2021-06-05 04:00:59,794 INFO L226 Difference]: Without dead ends: 34300 [2021-06-05 04:00:59,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3943 ImplicationChecksByTransitivity, 988.9ms TimeCoverageRelationStatistics Valid=3249, Invalid=8961, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 04:00:59,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34300 states. [2021-06-05 04:01:00,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34300 to 31889. [2021-06-05 04:01:00,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31889 states, 31888 states have (on average 3.188817109884596) internal successors, (101685), 31888 states have internal predecessors, (101685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:00,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31889 states to 31889 states and 101685 transitions. [2021-06-05 04:01:00,327 INFO L78 Accepts]: Start accepts. Automaton has 31889 states and 101685 transitions. Word has length 26 [2021-06-05 04:01:00,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:00,327 INFO L482 AbstractCegarLoop]: Abstraction has 31889 states and 101685 transitions. [2021-06-05 04:01:00,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:00,327 INFO L276 IsEmpty]: Start isEmpty. Operand 31889 states and 101685 transitions. [2021-06-05 04:01:00,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:01:00,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:00,369 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:00,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable988,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:00,569 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:00,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:00,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1315246283, now seen corresponding path program 544 times [2021-06-05 04:01:00,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:00,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118461557] [2021-06-05 04:01:00,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:00,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:00,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118461557] [2021-06-05 04:01:00,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118461557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:00,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829130065] [2021-06-05 04:01:00,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:00,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:01:00,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:00,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:01:00,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:00,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829130065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:00,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:00,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 25 [2021-06-05 04:01:00,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705144410] [2021-06-05 04:01:00,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:01:00,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:00,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:01:00,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:01:00,775 INFO L87 Difference]: Start difference. First operand 31889 states and 101685 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:01,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:01,896 INFO L93 Difference]: Finished difference Result 42994 states and 135578 transitions. [2021-06-05 04:01:01,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 04:01:01,896 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:01:01,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:01,966 INFO L225 Difference]: With dead ends: 42994 [2021-06-05 04:01:01,966 INFO L226 Difference]: Without dead ends: 42979 [2021-06-05 04:01:01,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2845 ImplicationChecksByTransitivity, 839.1ms TimeCoverageRelationStatistics Valid=2766, Invalid=5424, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 04:01:01,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42979 states. [2021-06-05 04:01:02,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42979 to 37887. [2021-06-05 04:01:02,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37887 states, 37886 states have (on average 3.2266800401203612) internal successors, (122246), 37886 states have internal predecessors, (122246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:02,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37887 states to 37887 states and 122246 transitions. [2021-06-05 04:01:02,800 INFO L78 Accepts]: Start accepts. Automaton has 37887 states and 122246 transitions. Word has length 26 [2021-06-05 04:01:02,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:02,800 INFO L482 AbstractCegarLoop]: Abstraction has 37887 states and 122246 transitions. [2021-06-05 04:01:02,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:02,800 INFO L276 IsEmpty]: Start isEmpty. Operand 37887 states and 122246 transitions. [2021-06-05 04:01:02,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:01:02,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:02,848 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:03,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable989 [2021-06-05 04:01:03,048 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:03,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:03,049 INFO L82 PathProgramCache]: Analyzing trace with hash 850655179, now seen corresponding path program 545 times [2021-06-05 04:01:03,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:03,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422962221] [2021-06-05 04:01:03,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:01:03,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:03,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422962221] [2021-06-05 04:01:03,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422962221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:03,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801285446] [2021-06-05 04:01:03,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:03,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:01:03,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:03,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:01:03,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:03,251 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:03,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801285446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:03,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:03,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 25 [2021-06-05 04:01:03,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849707137] [2021-06-05 04:01:03,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:01:03,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:03,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:01:03,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:01:03,252 INFO L87 Difference]: Start difference. First operand 37887 states and 122246 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:05,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:05,188 INFO L93 Difference]: Finished difference Result 41043 states and 129835 transitions. [2021-06-05 04:01:05,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-06-05 04:01:05,189 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:01:05,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:05,256 INFO L225 Difference]: With dead ends: 41043 [2021-06-05 04:01:05,256 INFO L226 Difference]: Without dead ends: 41039 [2021-06-05 04:01:05,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9041 ImplicationChecksByTransitivity, 1562.0ms TimeCoverageRelationStatistics Valid=5710, Invalid=15752, Unknown=0, NotChecked=0, Total=21462 [2021-06-05 04:01:05,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41039 states. [2021-06-05 04:01:05,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41039 to 37190. [2021-06-05 04:01:05,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37190 states, 37189 states have (on average 3.2220817983812418) internal successors, (119826), 37189 states have internal predecessors, (119826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:05,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37190 states to 37190 states and 119826 transitions. [2021-06-05 04:01:05,939 INFO L78 Accepts]: Start accepts. Automaton has 37190 states and 119826 transitions. Word has length 26 [2021-06-05 04:01:05,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:05,939 INFO L482 AbstractCegarLoop]: Abstraction has 37190 states and 119826 transitions. [2021-06-05 04:01:05,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:05,939 INFO L276 IsEmpty]: Start isEmpty. Operand 37190 states and 119826 transitions. [2021-06-05 04:01:05,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:01:05,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:05,989 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:06,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable990,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:06,189 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:06,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:06,189 INFO L82 PathProgramCache]: Analyzing trace with hash 817055951, now seen corresponding path program 546 times [2021-06-05 04:01:06,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:06,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319267020] [2021-06-05 04:01:06,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:01:06,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:06,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319267020] [2021-06-05 04:01:06,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319267020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:06,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373231713] [2021-06-05 04:01:06,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:06,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:01:06,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:06,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:01:06,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:06,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373231713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:06,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:06,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 26 [2021-06-05 04:01:06,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812980660] [2021-06-05 04:01:06,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:01:06,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:06,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:01:06,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:01:06,411 INFO L87 Difference]: Start difference. First operand 37190 states and 119826 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:08,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:08,204 INFO L93 Difference]: Finished difference Result 41476 states and 131495 transitions. [2021-06-05 04:01:08,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-06-05 04:01:08,204 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:01:08,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:08,269 INFO L225 Difference]: With dead ends: 41476 [2021-06-05 04:01:08,270 INFO L226 Difference]: Without dead ends: 41468 [2021-06-05 04:01:08,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7764 ImplicationChecksByTransitivity, 1522.6ms TimeCoverageRelationStatistics Valid=4932, Invalid=13974, Unknown=0, NotChecked=0, Total=18906 [2021-06-05 04:01:08,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41468 states. [2021-06-05 04:01:08,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41468 to 37586. [2021-06-05 04:01:08,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37586 states, 37585 states have (on average 3.2260476253824666) internal successors, (121251), 37585 states have internal predecessors, (121251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:08,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37586 states to 37586 states and 121251 transitions. [2021-06-05 04:01:08,946 INFO L78 Accepts]: Start accepts. Automaton has 37586 states and 121251 transitions. Word has length 26 [2021-06-05 04:01:08,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:08,946 INFO L482 AbstractCegarLoop]: Abstraction has 37586 states and 121251 transitions. [2021-06-05 04:01:08,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:08,946 INFO L276 IsEmpty]: Start isEmpty. Operand 37586 states and 121251 transitions. [2021-06-05 04:01:08,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:01:08,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:08,994 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:09,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable991 [2021-06-05 04:01:09,194 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:09,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:09,194 INFO L82 PathProgramCache]: Analyzing trace with hash -224520117, now seen corresponding path program 547 times [2021-06-05 04:01:09,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:09,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855185903] [2021-06-05 04:01:09,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:09,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:01:09,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:09,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855185903] [2021-06-05 04:01:09,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855185903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:09,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804612666] [2021-06-05 04:01:09,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:09,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:01:09,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:09,414 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:09,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804612666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:09,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:09,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 27 [2021-06-05 04:01:09,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695303220] [2021-06-05 04:01:09,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 04:01:09,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:09,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 04:01:09,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:01:09,415 INFO L87 Difference]: Start difference. First operand 37586 states and 121251 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:10,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:10,992 INFO L93 Difference]: Finished difference Result 42209 states and 134096 transitions. [2021-06-05 04:01:10,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-06-05 04:01:10,992 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:01:10,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:11,060 INFO L225 Difference]: With dead ends: 42209 [2021-06-05 04:01:11,060 INFO L226 Difference]: Without dead ends: 42197 [2021-06-05 04:01:11,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6687 ImplicationChecksByTransitivity, 1297.6ms TimeCoverageRelationStatistics Valid=4267, Invalid=12503, Unknown=0, NotChecked=0, Total=16770 [2021-06-05 04:01:11,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42197 states. [2021-06-05 04:01:11,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42197 to 38325. [2021-06-05 04:01:11,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38325 states, 38324 states have (on average 3.2297515916918904) internal successors, (123777), 38324 states have internal predecessors, (123777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:11,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38325 states to 38325 states and 123777 transitions. [2021-06-05 04:01:11,770 INFO L78 Accepts]: Start accepts. Automaton has 38325 states and 123777 transitions. Word has length 26 [2021-06-05 04:01:11,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:11,770 INFO L482 AbstractCegarLoop]: Abstraction has 38325 states and 123777 transitions. [2021-06-05 04:01:11,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:11,771 INFO L276 IsEmpty]: Start isEmpty. Operand 38325 states and 123777 transitions. [2021-06-05 04:01:11,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:01:11,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:11,817 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:12,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 551 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable992 [2021-06-05 04:01:12,018 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:12,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:12,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1846360143, now seen corresponding path program 548 times [2021-06-05 04:01:12,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:12,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090030982] [2021-06-05 04:01:12,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:12,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:01:12,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:12,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090030982] [2021-06-05 04:01:12,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090030982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:12,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094440687] [2021-06-05 04:01:12,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:12,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:01:12,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:12,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:01:12,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:12,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094440687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:12,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:12,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2021-06-05 04:01:12,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33838201] [2021-06-05 04:01:12,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 04:01:12,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:12,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 04:01:12,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:01:12,430 INFO L87 Difference]: Start difference. First operand 38325 states and 123777 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:13,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:13,913 INFO L93 Difference]: Finished difference Result 43278 states and 137750 transitions. [2021-06-05 04:01:13,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-06-05 04:01:13,913 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:01:13,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:14,015 INFO L225 Difference]: With dead ends: 43278 [2021-06-05 04:01:14,015 INFO L226 Difference]: Without dead ends: 43262 [2021-06-05 04:01:14,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5785 ImplicationChecksByTransitivity, 1379.0ms TimeCoverageRelationStatistics Valid=3724, Invalid=11282, Unknown=0, NotChecked=0, Total=15006 [2021-06-05 04:01:14,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43262 states. [2021-06-05 04:01:14,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43262 to 39413. [2021-06-05 04:01:14,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39413 states, 39412 states have (on average 3.2331269664061706) internal successors, (127424), 39412 states have internal predecessors, (127424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:14,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39413 states to 39413 states and 127424 transitions. [2021-06-05 04:01:14,813 INFO L78 Accepts]: Start accepts. Automaton has 39413 states and 127424 transitions. Word has length 26 [2021-06-05 04:01:14,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:14,813 INFO L482 AbstractCegarLoop]: Abstraction has 39413 states and 127424 transitions. [2021-06-05 04:01:14,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:14,813 INFO L276 IsEmpty]: Start isEmpty. Operand 39413 states and 127424 transitions. [2021-06-05 04:01:14,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:01:14,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:14,867 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:15,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable993 [2021-06-05 04:01:15,081 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:15,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:15,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1619138763, now seen corresponding path program 549 times [2021-06-05 04:01:15,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:15,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197643387] [2021-06-05 04:01:15,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:01:15,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:15,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197643387] [2021-06-05 04:01:15,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197643387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:15,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176221029] [2021-06-05 04:01:15,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:15,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:01:15,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:15,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:01:15,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:15,367 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:15,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176221029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:15,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:15,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 29 [2021-06-05 04:01:15,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280475544] [2021-06-05 04:01:15,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 04:01:15,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:15,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 04:01:15,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:01:15,368 INFO L87 Difference]: Start difference. First operand 39413 states and 127424 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:16,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:16,874 INFO L93 Difference]: Finished difference Result 44769 states and 142689 transitions. [2021-06-05 04:01:16,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-05 04:01:16,874 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:01:16,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:16,952 INFO L225 Difference]: With dead ends: 44769 [2021-06-05 04:01:16,953 INFO L226 Difference]: Without dead ends: 44749 [2021-06-05 04:01:16,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5055 ImplicationChecksByTransitivity, 1302.3ms TimeCoverageRelationStatistics Valid=3311, Invalid=10261, Unknown=0, NotChecked=0, Total=13572 [2021-06-05 04:01:16,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44749 states. [2021-06-05 04:01:17,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44749 to 41645. [2021-06-05 04:01:17,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41645 states, 41644 states have (on average 3.238041494573048) internal successors, (134845), 41644 states have internal predecessors, (134845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:17,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41645 states to 41645 states and 134845 transitions. [2021-06-05 04:01:17,696 INFO L78 Accepts]: Start accepts. Automaton has 41645 states and 134845 transitions. Word has length 26 [2021-06-05 04:01:17,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:17,697 INFO L482 AbstractCegarLoop]: Abstraction has 41645 states and 134845 transitions. [2021-06-05 04:01:17,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:17,697 INFO L276 IsEmpty]: Start isEmpty. Operand 41645 states and 134845 transitions. [2021-06-05 04:01:17,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:01:17,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:17,758 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:17,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 553 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-06-05 04:01:17,959 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:17,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:17,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1129756721, now seen corresponding path program 550 times [2021-06-05 04:01:17,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:17,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166409776] [2021-06-05 04:01:17,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:01:18,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:18,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166409776] [2021-06-05 04:01:18,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166409776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:18,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154878119] [2021-06-05 04:01:18,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:18,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:01:18,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:18,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:01:18,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:18,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154878119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:18,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:18,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-05 04:01:18,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903793818] [2021-06-05 04:01:18,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 04:01:18,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:18,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 04:01:18,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:01:18,238 INFO L87 Difference]: Start difference. First operand 41645 states and 134845 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:19,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:19,620 INFO L93 Difference]: Finished difference Result 47008 states and 150165 transitions. [2021-06-05 04:01:19,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 04:01:19,620 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:01:19,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:19,699 INFO L225 Difference]: With dead ends: 47008 [2021-06-05 04:01:19,699 INFO L226 Difference]: Without dead ends: 46984 [2021-06-05 04:01:19,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4499 ImplicationChecksByTransitivity, 1191.7ms TimeCoverageRelationStatistics Valid=3035, Invalid=9397, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 04:01:19,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46984 states. [2021-06-05 04:01:20,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46984 to 43802. [2021-06-05 04:01:20,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43802 states, 43801 states have (on average 3.243510422136481) internal successors, (142069), 43801 states have internal predecessors, (142069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:20,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43802 states to 43802 states and 142069 transitions. [2021-06-05 04:01:20,452 INFO L78 Accepts]: Start accepts. Automaton has 43802 states and 142069 transitions. Word has length 26 [2021-06-05 04:01:20,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:20,452 INFO L482 AbstractCegarLoop]: Abstraction has 43802 states and 142069 transitions. [2021-06-05 04:01:20,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:20,452 INFO L276 IsEmpty]: Start isEmpty. Operand 43802 states and 142069 transitions. [2021-06-05 04:01:20,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:01:20,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:20,509 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:20,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable995 [2021-06-05 04:01:20,710 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:20,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:20,710 INFO L82 PathProgramCache]: Analyzing trace with hash -446170805, now seen corresponding path program 551 times [2021-06-05 04:01:20,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:20,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728266983] [2021-06-05 04:01:20,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:20,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:20,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728266983] [2021-06-05 04:01:20,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728266983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:20,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537475079] [2021-06-05 04:01:20,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:20,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:01:20,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:20,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:01:20,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:20,989 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:20,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537475079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:20,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:20,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-05 04:01:20,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735483607] [2021-06-05 04:01:20,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 04:01:20,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:20,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 04:01:20,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=717, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:01:20,990 INFO L87 Difference]: Start difference. First operand 43802 states and 142069 transitions. Second operand has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:22,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:22,247 INFO L93 Difference]: Finished difference Result 46885 states and 150062 transitions. [2021-06-05 04:01:22,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 04:01:22,248 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:01:22,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:22,330 INFO L225 Difference]: With dead ends: 46885 [2021-06-05 04:01:22,330 INFO L226 Difference]: Without dead ends: 46857 [2021-06-05 04:01:22,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3961 ImplicationChecksByTransitivity, 1056.9ms TimeCoverageRelationStatistics Valid=2902, Invalid=8654, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 04:01:22,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46857 states. [2021-06-05 04:01:23,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46857 to 43877. [2021-06-05 04:01:23,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43877 states, 43876 states have (on average 3.243390464035008) internal successors, (142307), 43876 states have internal predecessors, (142307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:23,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43877 states to 43877 states and 142307 transitions. [2021-06-05 04:01:23,147 INFO L78 Accepts]: Start accepts. Automaton has 43877 states and 142307 transitions. Word has length 26 [2021-06-05 04:01:23,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:23,147 INFO L482 AbstractCegarLoop]: Abstraction has 43877 states and 142307 transitions. [2021-06-05 04:01:23,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:23,147 INFO L276 IsEmpty]: Start isEmpty. Operand 43877 states and 142307 transitions. [2021-06-05 04:01:23,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:01:23,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:23,418 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:23,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable996,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:23,619 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:23,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:23,619 INFO L82 PathProgramCache]: Analyzing trace with hash -796911989, now seen corresponding path program 552 times [2021-06-05 04:01:23,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:23,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810121115] [2021-06-05 04:01:23,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:23,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:23,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810121115] [2021-06-05 04:01:23,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810121115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:23,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167686675] [2021-06-05 04:01:23,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:23,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:01:23,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:23,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:01:23,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:23,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167686675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:23,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:23,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-06-05 04:01:23,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913443996] [2021-06-05 04:01:23,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:01:23,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:23,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:01:23,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:01:23,831 INFO L87 Difference]: Start difference. First operand 43877 states and 142307 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:24,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:24,140 INFO L93 Difference]: Finished difference Result 49441 states and 158707 transitions. [2021-06-05 04:01:24,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:01:24,141 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:01:24,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:24,230 INFO L225 Difference]: With dead ends: 49441 [2021-06-05 04:01:24,231 INFO L226 Difference]: Without dead ends: 49441 [2021-06-05 04:01:24,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=307, Invalid=685, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:01:24,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49441 states. [2021-06-05 04:01:24,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49441 to 44031. [2021-06-05 04:01:24,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44031 states, 44030 states have (on average 3.2426073131955486) internal successors, (142772), 44030 states have internal predecessors, (142772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:25,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44031 states to 44031 states and 142772 transitions. [2021-06-05 04:01:25,049 INFO L78 Accepts]: Start accepts. Automaton has 44031 states and 142772 transitions. Word has length 26 [2021-06-05 04:01:25,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:25,049 INFO L482 AbstractCegarLoop]: Abstraction has 44031 states and 142772 transitions. [2021-06-05 04:01:25,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:25,049 INFO L276 IsEmpty]: Start isEmpty. Operand 44031 states and 142772 transitions. [2021-06-05 04:01:25,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:01:25,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:25,103 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:25,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable997 [2021-06-05 04:01:25,303 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:25,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:25,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1573297961, now seen corresponding path program 553 times [2021-06-05 04:01:25,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:25,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488030421] [2021-06-05 04:01:25,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:25,380 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:25,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:25,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488030421] [2021-06-05 04:01:25,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488030421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:25,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577436186] [2021-06-05 04:01:25,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:25,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:01:25,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:25,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577436186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:25,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:25,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 04:01:25,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409278885] [2021-06-05 04:01:25,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:01:25,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:25,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:01:25,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:01:25,508 INFO L87 Difference]: Start difference. First operand 44031 states and 142772 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:25,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:25,907 INFO L93 Difference]: Finished difference Result 46562 states and 149936 transitions. [2021-06-05 04:01:25,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:01:25,907 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:01:25,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:25,991 INFO L225 Difference]: With dead ends: 46562 [2021-06-05 04:01:25,992 INFO L226 Difference]: Without dead ends: 46562 [2021-06-05 04:01:25,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 248.0ms TimeCoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 04:01:26,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46562 states. [2021-06-05 04:01:26,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46562 to 44113. [2021-06-05 04:01:26,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44113 states, 44112 states have (on average 3.2421563293434894) internal successors, (143018), 44112 states have internal predecessors, (143018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:26,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44113 states to 44113 states and 143018 transitions. [2021-06-05 04:01:26,917 INFO L78 Accepts]: Start accepts. Automaton has 44113 states and 143018 transitions. Word has length 26 [2021-06-05 04:01:26,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:26,917 INFO L482 AbstractCegarLoop]: Abstraction has 44113 states and 143018 transitions. [2021-06-05 04:01:26,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:26,917 INFO L276 IsEmpty]: Start isEmpty. Operand 44113 states and 143018 transitions. [2021-06-05 04:01:26,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:01:26,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:26,979 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:27,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable998,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:27,185 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:27,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:27,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1035805105, now seen corresponding path program 554 times [2021-06-05 04:01:27,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:27,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512068041] [2021-06-05 04:01:27,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:27,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:27,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512068041] [2021-06-05 04:01:27,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512068041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:27,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743092811] [2021-06-05 04:01:27,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:27,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:01:27,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:27,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:01:27,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:27,408 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:27,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743092811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:27,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:27,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 04:01:27,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046074358] [2021-06-05 04:01:27,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:01:27,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:27,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:01:27,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:01:27,409 INFO L87 Difference]: Start difference. First operand 44113 states and 143018 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:28,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:28,039 INFO L93 Difference]: Finished difference Result 48235 states and 154817 transitions. [2021-06-05 04:01:28,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 04:01:28,039 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:01:28,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:28,135 INFO L225 Difference]: With dead ends: 48235 [2021-06-05 04:01:28,135 INFO L226 Difference]: Without dead ends: 48235 [2021-06-05 04:01:28,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 421.9ms TimeCoverageRelationStatistics Valid=1012, Invalid=2068, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 04:01:28,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48235 states. [2021-06-05 04:01:28,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48235 to 44213. [2021-06-05 04:01:29,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44213 states, 44212 states have (on average 3.241608613046232) internal successors, (143318), 44212 states have internal predecessors, (143318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:29,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44213 states to 44213 states and 143318 transitions. [2021-06-05 04:01:29,117 INFO L78 Accepts]: Start accepts. Automaton has 44213 states and 143318 transitions. Word has length 26 [2021-06-05 04:01:29,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:29,117 INFO L482 AbstractCegarLoop]: Abstraction has 44213 states and 143318 transitions. [2021-06-05 04:01:29,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:29,117 INFO L276 IsEmpty]: Start isEmpty. Operand 44213 states and 143318 transitions. [2021-06-05 04:01:29,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:01:29,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:29,176 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:29,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable999,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:29,377 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:29,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:29,377 INFO L82 PathProgramCache]: Analyzing trace with hash -187182633, now seen corresponding path program 555 times [2021-06-05 04:01:29,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:29,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841217220] [2021-06-05 04:01:29,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:29,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:29,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:29,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841217220] [2021-06-05 04:01:29,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841217220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:29,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062099318] [2021-06-05 04:01:29,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:29,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:01:29,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:29,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:01:29,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:29,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062099318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:29,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:29,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 04:01:29,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333883441] [2021-06-05 04:01:29,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:01:29,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:29,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:01:29,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:01:29,598 INFO L87 Difference]: Start difference. First operand 44213 states and 143318 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:30,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:30,465 INFO L93 Difference]: Finished difference Result 48961 states and 156816 transitions. [2021-06-05 04:01:30,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 04:01:30,465 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:01:30,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:30,712 INFO L225 Difference]: With dead ends: 48961 [2021-06-05 04:01:30,712 INFO L226 Difference]: Without dead ends: 48961 [2021-06-05 04:01:30,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1456 ImplicationChecksByTransitivity, 616.2ms TimeCoverageRelationStatistics Valid=1750, Invalid=3506, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 04:01:30,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48961 states. [2021-06-05 04:01:31,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48961 to 44558. [2021-06-05 04:01:31,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44558 states, 44557 states have (on average 3.239737863859775) internal successors, (144353), 44557 states have internal predecessors, (144353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:31,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44558 states to 44558 states and 144353 transitions. [2021-06-05 04:01:31,736 INFO L78 Accepts]: Start accepts. Automaton has 44558 states and 144353 transitions. Word has length 26 [2021-06-05 04:01:31,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:31,736 INFO L482 AbstractCegarLoop]: Abstraction has 44558 states and 144353 transitions. [2021-06-05 04:01:31,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:31,736 INFO L276 IsEmpty]: Start isEmpty. Operand 44558 states and 144353 transitions. [2021-06-05 04:01:31,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:01:31,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:31,789 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:31,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1000 [2021-06-05 04:01:31,990 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:31,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:31,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1502760271, now seen corresponding path program 556 times [2021-06-05 04:01:31,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:31,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732755607] [2021-06-05 04:01:31,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:32,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:32,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732755607] [2021-06-05 04:01:32,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732755607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:32,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052758252] [2021-06-05 04:01:32,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:32,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:01:32,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:32,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:01:32,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:32,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052758252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:32,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:32,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 04:01:32,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135512128] [2021-06-05 04:01:32,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:01:32,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:32,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:01:32,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:01:32,195 INFO L87 Difference]: Start difference. First operand 44558 states and 144353 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:33,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:33,417 INFO L93 Difference]: Finished difference Result 49314 states and 157697 transitions. [2021-06-05 04:01:33,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 04:01:33,417 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:01:33,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:33,508 INFO L225 Difference]: With dead ends: 49314 [2021-06-05 04:01:33,508 INFO L226 Difference]: Without dead ends: 49314 [2021-06-05 04:01:33,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 928.2ms TimeCoverageRelationStatistics Valid=2647, Invalid=5363, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 04:01:33,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49314 states. [2021-06-05 04:01:34,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49314 to 44956. [2021-06-05 04:01:34,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44956 states, 44955 states have (on average 3.237548659770882) internal successors, (145544), 44955 states have internal predecessors, (145544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:34,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44956 states to 44956 states and 145544 transitions. [2021-06-05 04:01:34,406 INFO L78 Accepts]: Start accepts. Automaton has 44956 states and 145544 transitions. Word has length 26 [2021-06-05 04:01:34,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:34,406 INFO L482 AbstractCegarLoop]: Abstraction has 44956 states and 145544 transitions. [2021-06-05 04:01:34,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:34,406 INFO L276 IsEmpty]: Start isEmpty. Operand 44956 states and 145544 transitions. [2021-06-05 04:01:34,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:01:34,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:34,470 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:34,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1001 [2021-06-05 04:01:34,670 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:34,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:34,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1906408745, now seen corresponding path program 557 times [2021-06-05 04:01:34,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:34,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601091038] [2021-06-05 04:01:34,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:34,748 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:34,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:34,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601091038] [2021-06-05 04:01:34,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601091038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:34,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903365177] [2021-06-05 04:01:34,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:34,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:01:34,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:34,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:01:34,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:34,896 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:34,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903365177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:34,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:34,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 04:01:34,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646503759] [2021-06-05 04:01:34,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:01:34,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:34,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:01:34,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:01:34,897 INFO L87 Difference]: Start difference. First operand 44956 states and 145544 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:36,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:36,583 INFO L93 Difference]: Finished difference Result 49524 states and 158196 transitions. [2021-06-05 04:01:36,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 04:01:36,583 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:01:36,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:36,676 INFO L225 Difference]: With dead ends: 49524 [2021-06-05 04:01:36,676 INFO L226 Difference]: Without dead ends: 49524 [2021-06-05 04:01:36,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3156 ImplicationChecksByTransitivity, 1302.9ms TimeCoverageRelationStatistics Valid=3467, Invalid=7039, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 04:01:36,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49524 states. [2021-06-05 04:01:37,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49524 to 45272. [2021-06-05 04:01:37,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45272 states, 45271 states have (on average 3.2359788827284577) internal successors, (146496), 45271 states have internal predecessors, (146496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:37,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45272 states to 45272 states and 146496 transitions. [2021-06-05 04:01:37,699 INFO L78 Accepts]: Start accepts. Automaton has 45272 states and 146496 transitions. Word has length 26 [2021-06-05 04:01:37,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:37,699 INFO L482 AbstractCegarLoop]: Abstraction has 45272 states and 146496 transitions. [2021-06-05 04:01:37,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:37,699 INFO L276 IsEmpty]: Start isEmpty. Operand 45272 states and 146496 transitions. [2021-06-05 04:01:37,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:01:37,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:37,947 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:38,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1002 [2021-06-05 04:01:38,148 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:38,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:38,148 INFO L82 PathProgramCache]: Analyzing trace with hash 200375375, now seen corresponding path program 558 times [2021-06-05 04:01:38,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:38,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416979594] [2021-06-05 04:01:38,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:38,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:38,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416979594] [2021-06-05 04:01:38,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416979594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:38,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290262133] [2021-06-05 04:01:38,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:38,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:01:38,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:38,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:01:38,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:38,367 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:38,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290262133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:38,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:38,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 04:01:38,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261846516] [2021-06-05 04:01:38,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:01:38,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:38,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:01:38,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:01:38,367 INFO L87 Difference]: Start difference. First operand 45272 states and 146496 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:39,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:39,880 INFO L93 Difference]: Finished difference Result 49619 states and 158430 transitions. [2021-06-05 04:01:39,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 04:01:39,880 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:01:39,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:39,970 INFO L225 Difference]: With dead ends: 49619 [2021-06-05 04:01:39,970 INFO L226 Difference]: Without dead ends: 49619 [2021-06-05 04:01:39,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3332 ImplicationChecksByTransitivity, 1130.4ms TimeCoverageRelationStatistics Valid=3733, Invalid=7397, Unknown=0, NotChecked=0, Total=11130 [2021-06-05 04:01:40,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49619 states. [2021-06-05 04:01:40,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49619 to 45591. [2021-06-05 04:01:40,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45591 states, 45590 states have (on average 3.234722526869928) internal successors, (147471), 45590 states have internal predecessors, (147471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:40,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45591 states to 45591 states and 147471 transitions. [2021-06-05 04:01:40,886 INFO L78 Accepts]: Start accepts. Automaton has 45591 states and 147471 transitions. Word has length 26 [2021-06-05 04:01:40,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:40,886 INFO L482 AbstractCegarLoop]: Abstraction has 45591 states and 147471 transitions. [2021-06-05 04:01:40,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:40,886 INFO L276 IsEmpty]: Start isEmpty. Operand 45591 states and 147471 transitions. [2021-06-05 04:01:40,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:01:40,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:40,946 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:41,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1003 [2021-06-05 04:01:41,146 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:41,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:41,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1948421161, now seen corresponding path program 559 times [2021-06-05 04:01:41,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:41,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125579008] [2021-06-05 04:01:41,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:41,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:41,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125579008] [2021-06-05 04:01:41,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125579008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:41,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077710001] [2021-06-05 04:01:41,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:41,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:01:41,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:41,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077710001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:41,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:41,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 04:01:41,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011156779] [2021-06-05 04:01:41,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:01:41,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:41,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:01:41,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:01:41,376 INFO L87 Difference]: Start difference. First operand 45591 states and 147471 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:42,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:42,855 INFO L93 Difference]: Finished difference Result 50206 states and 160535 transitions. [2021-06-05 04:01:42,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 04:01:42,855 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:01:42,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:43,058 INFO L225 Difference]: With dead ends: 50206 [2021-06-05 04:01:43,058 INFO L226 Difference]: Without dead ends: 50206 [2021-06-05 04:01:43,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2827 ImplicationChecksByTransitivity, 1006.6ms TimeCoverageRelationStatistics Valid=3559, Invalid=6541, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 04:01:43,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50206 states. [2021-06-05 04:01:43,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50206 to 45971. [2021-06-05 04:01:43,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45971 states, 45970 states have (on average 3.2388949314770503) internal successors, (148892), 45970 states have internal predecessors, (148892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:43,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45971 states to 45971 states and 148892 transitions. [2021-06-05 04:01:43,899 INFO L78 Accepts]: Start accepts. Automaton has 45971 states and 148892 transitions. Word has length 26 [2021-06-05 04:01:43,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:43,899 INFO L482 AbstractCegarLoop]: Abstraction has 45971 states and 148892 transitions. [2021-06-05 04:01:43,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:43,899 INFO L276 IsEmpty]: Start isEmpty. Operand 45971 states and 148892 transitions. [2021-06-05 04:01:43,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:01:43,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:43,957 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:44,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1004 [2021-06-05 04:01:44,157 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:44,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:44,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1376966355, now seen corresponding path program 560 times [2021-06-05 04:01:44,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:44,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687602573] [2021-06-05 04:01:44,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:44,234 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:44,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:44,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687602573] [2021-06-05 04:01:44,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687602573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:44,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518509376] [2021-06-05 04:01:44,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:44,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:01:44,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:44,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:01:44,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:44,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518509376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:44,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:44,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 04:01:44,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913895017] [2021-06-05 04:01:44,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:01:44,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:44,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:01:44,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:01:44,372 INFO L87 Difference]: Start difference. First operand 45971 states and 148892 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:45,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:45,861 INFO L93 Difference]: Finished difference Result 48233 states and 154779 transitions. [2021-06-05 04:01:45,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 04:01:45,861 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:01:45,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:46,081 INFO L225 Difference]: With dead ends: 48233 [2021-06-05 04:01:46,081 INFO L226 Difference]: Without dead ends: 48227 [2021-06-05 04:01:46,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3421 ImplicationChecksByTransitivity, 1026.7ms TimeCoverageRelationStatistics Valid=4219, Invalid=7991, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 04:01:46,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48227 states. [2021-06-05 04:01:46,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48227 to 43625. [2021-06-05 04:01:46,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43625 states, 43624 states have (on average 3.2369796442325325) internal successors, (141210), 43624 states have internal predecessors, (141210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:46,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43625 states to 43625 states and 141210 transitions. [2021-06-05 04:01:46,950 INFO L78 Accepts]: Start accepts. Automaton has 43625 states and 141210 transitions. Word has length 26 [2021-06-05 04:01:46,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:46,951 INFO L482 AbstractCegarLoop]: Abstraction has 43625 states and 141210 transitions. [2021-06-05 04:01:46,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:46,951 INFO L276 IsEmpty]: Start isEmpty. Operand 43625 states and 141210 transitions. [2021-06-05 04:01:47,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:01:47,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:47,007 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:47,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1005 [2021-06-05 04:01:47,207 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:47,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:47,207 INFO L82 PathProgramCache]: Analyzing trace with hash 986429395, now seen corresponding path program 561 times [2021-06-05 04:01:47,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:47,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612334388] [2021-06-05 04:01:47,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:47,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:47,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:47,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612334388] [2021-06-05 04:01:47,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612334388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:47,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975549026] [2021-06-05 04:01:47,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:47,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:01:47,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:47,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:01:47,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:47,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975549026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:47,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:47,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 04:01:47,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400054318] [2021-06-05 04:01:47,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:01:47,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:47,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:01:47,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:01:47,424 INFO L87 Difference]: Start difference. First operand 43625 states and 141210 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:47,792 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2021-06-05 04:01:48,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:48,717 INFO L93 Difference]: Finished difference Result 54116 states and 173271 transitions. [2021-06-05 04:01:48,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 04:01:48,718 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:01:48,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:48,833 INFO L225 Difference]: With dead ends: 54116 [2021-06-05 04:01:48,833 INFO L226 Difference]: Without dead ends: 54098 [2021-06-05 04:01:48,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 967.2ms TimeCoverageRelationStatistics Valid=2504, Invalid=5506, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 04:01:48,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54098 states. [2021-06-05 04:01:49,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54098 to 49816. [2021-06-05 04:01:49,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49816 states, 49815 states have (on average 3.2425173140620296) internal successors, (161526), 49815 states have internal predecessors, (161526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:50,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49816 states to 49816 states and 161526 transitions. [2021-06-05 04:01:50,055 INFO L78 Accepts]: Start accepts. Automaton has 49816 states and 161526 transitions. Word has length 26 [2021-06-05 04:01:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:50,056 INFO L482 AbstractCegarLoop]: Abstraction has 49816 states and 161526 transitions. [2021-06-05 04:01:50,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:50,056 INFO L276 IsEmpty]: Start isEmpty. Operand 49816 states and 161526 transitions. [2021-06-05 04:01:50,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:01:50,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:50,121 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:50,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1006,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:50,321 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:50,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:50,321 INFO L82 PathProgramCache]: Analyzing trace with hash 521838291, now seen corresponding path program 562 times [2021-06-05 04:01:50,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:50,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566581097] [2021-06-05 04:01:50,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:50,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:50,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566581097] [2021-06-05 04:01:50,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566581097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:50,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398516018] [2021-06-05 04:01:50,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:50,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:01:50,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:50,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:01:50,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:50,556 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:50,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398516018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:50,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:50,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 04:01:50,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750105074] [2021-06-05 04:01:50,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:01:50,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:50,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:01:50,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:01:50,557 INFO L87 Difference]: Start difference. First operand 49816 states and 161526 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:51,275 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-05 04:01:51,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:51,836 INFO L93 Difference]: Finished difference Result 53503 states and 171241 transitions. [2021-06-05 04:01:51,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 04:01:51,836 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:01:51,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:51,952 INFO L225 Difference]: With dead ends: 53503 [2021-06-05 04:01:51,952 INFO L226 Difference]: Without dead ends: 53499 [2021-06-05 04:01:51,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 972.4ms TimeCoverageRelationStatistics Valid=2139, Invalid=6791, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 04:01:51,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53499 states. [2021-06-05 04:01:52,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53499 to 47771. [2021-06-05 04:01:52,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47771 states, 47770 states have (on average 3.230751517688926) internal successors, (154333), 47770 states have internal predecessors, (154333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:53,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47771 states to 47771 states and 154333 transitions. [2021-06-05 04:01:53,090 INFO L78 Accepts]: Start accepts. Automaton has 47771 states and 154333 transitions. Word has length 26 [2021-06-05 04:01:53,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:53,090 INFO L482 AbstractCegarLoop]: Abstraction has 47771 states and 154333 transitions. [2021-06-05 04:01:53,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:53,090 INFO L276 IsEmpty]: Start isEmpty. Operand 47771 states and 154333 transitions. [2021-06-05 04:01:53,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:01:53,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:53,147 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:53,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1007 [2021-06-05 04:01:53,347 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:53,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:53,347 INFO L82 PathProgramCache]: Analyzing trace with hash 488239063, now seen corresponding path program 563 times [2021-06-05 04:01:53,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:53,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583292] [2021-06-05 04:01:53,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:53,418 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:53,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:53,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583292] [2021-06-05 04:01:53,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:53,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379001164] [2021-06-05 04:01:53,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:53,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:01:53,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:53,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:01:53,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:53,566 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:53,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379001164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:53,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:53,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 04:01:53,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483339050] [2021-06-05 04:01:53,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:01:53,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:53,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:01:53,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:01:53,567 INFO L87 Difference]: Start difference. First operand 47771 states and 154333 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:54,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:54,689 INFO L93 Difference]: Finished difference Result 52379 states and 167071 transitions. [2021-06-05 04:01:54,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 04:01:54,689 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:01:54,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:54,789 INFO L225 Difference]: With dead ends: 52379 [2021-06-05 04:01:54,789 INFO L226 Difference]: Without dead ends: 52371 [2021-06-05 04:01:54,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2557 ImplicationChecksByTransitivity, 853.0ms TimeCoverageRelationStatistics Valid=1836, Invalid=6174, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 04:01:54,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52371 states. [2021-06-05 04:01:55,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52371 to 48376. [2021-06-05 04:01:55,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48376 states, 48375 states have (on average 3.229519379844961) internal successors, (156228), 48375 states have internal predecessors, (156228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:55,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48376 states to 48376 states and 156228 transitions. [2021-06-05 04:01:55,791 INFO L78 Accepts]: Start accepts. Automaton has 48376 states and 156228 transitions. Word has length 26 [2021-06-05 04:01:55,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:55,791 INFO L482 AbstractCegarLoop]: Abstraction has 48376 states and 156228 transitions. [2021-06-05 04:01:55,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:55,791 INFO L276 IsEmpty]: Start isEmpty. Operand 48376 states and 156228 transitions. [2021-06-05 04:01:55,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:01:55,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:55,849 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:56,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1008,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:56,049 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:56,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:56,050 INFO L82 PathProgramCache]: Analyzing trace with hash -553337005, now seen corresponding path program 564 times [2021-06-05 04:01:56,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:56,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835031577] [2021-06-05 04:01:56,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:56,119 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:56,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:56,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835031577] [2021-06-05 04:01:56,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835031577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:56,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196418159] [2021-06-05 04:01:56,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:56,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:01:56,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:56,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:01:56,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:56,256 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:56,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196418159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:56,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:56,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 04:01:56,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901946844] [2021-06-05 04:01:56,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:01:56,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:56,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:01:56,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:01:56,257 INFO L87 Difference]: Start difference. First operand 48376 states and 156228 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:56,688 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2021-06-05 04:01:57,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:57,363 INFO L93 Difference]: Finished difference Result 53683 states and 171385 transitions. [2021-06-05 04:01:57,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 04:01:57,364 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:01:57,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:57,470 INFO L225 Difference]: With dead ends: 53683 [2021-06-05 04:01:57,470 INFO L226 Difference]: Without dead ends: 53671 [2021-06-05 04:01:57,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2272 ImplicationChecksByTransitivity, 819.7ms TimeCoverageRelationStatistics Valid=1573, Invalid=5567, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 04:01:57,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53671 states. [2021-06-05 04:01:58,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53671 to 49064. [2021-06-05 04:01:58,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49064 states, 49063 states have (on average 3.2281964005462367) internal successors, (158385), 49063 states have internal predecessors, (158385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:58,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49064 states to 49064 states and 158385 transitions. [2021-06-05 04:01:58,588 INFO L78 Accepts]: Start accepts. Automaton has 49064 states and 158385 transitions. Word has length 26 [2021-06-05 04:01:58,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:58,588 INFO L482 AbstractCegarLoop]: Abstraction has 49064 states and 158385 transitions. [2021-06-05 04:01:58,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:58,588 INFO L276 IsEmpty]: Start isEmpty. Operand 49064 states and 158385 transitions. [2021-06-05 04:01:58,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:01:58,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:58,658 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:58,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 568 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1009 [2021-06-05 04:01:58,858 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:58,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:58,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1517543255, now seen corresponding path program 565 times [2021-06-05 04:01:58,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:58,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838843367] [2021-06-05 04:01:58,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:58,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:58,933 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:58,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:58,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838843367] [2021-06-05 04:01:58,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838843367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:58,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427681414] [2021-06-05 04:01:58,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:58,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:58,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:01:58,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:59,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427681414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:59,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:59,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 04:01:59,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833520816] [2021-06-05 04:01:59,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:01:59,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:59,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:01:59,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:01:59,083 INFO L87 Difference]: Start difference. First operand 49064 states and 158385 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:00,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:00,035 INFO L93 Difference]: Finished difference Result 55800 states and 178543 transitions. [2021-06-05 04:02:00,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 04:02:00,035 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:02:00,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:00,139 INFO L225 Difference]: With dead ends: 55800 [2021-06-05 04:02:00,139 INFO L226 Difference]: Without dead ends: 55784 [2021-06-05 04:02:00,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 663.6ms TimeCoverageRelationStatistics Valid=1351, Invalid=4969, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 04:02:00,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55784 states. [2021-06-05 04:02:01,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55784 to 49583. [2021-06-05 04:02:01,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49583 states, 49582 states have (on average 3.225424549231576) internal successors, (159923), 49582 states have internal predecessors, (159923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:01,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49583 states to 49583 states and 159923 transitions. [2021-06-05 04:02:01,184 INFO L78 Accepts]: Start accepts. Automaton has 49583 states and 159923 transitions. Word has length 26 [2021-06-05 04:02:01,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:01,184 INFO L482 AbstractCegarLoop]: Abstraction has 49583 states and 159923 transitions. [2021-06-05 04:02:01,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:01,184 INFO L276 IsEmpty]: Start isEmpty. Operand 49583 states and 159923 transitions. [2021-06-05 04:02:01,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:02:01,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:01,243 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:01,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1010,569 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:01,444 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:01,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:01,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1290321875, now seen corresponding path program 566 times [2021-06-05 04:02:01,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:01,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17571663] [2021-06-05 04:02:01,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:01,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:01,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17571663] [2021-06-05 04:02:01,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17571663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:01,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033766132] [2021-06-05 04:02:01,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:01,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:02:01,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:01,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:02:01,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:01,657 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:01,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033766132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:01,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:01,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 04:02:01,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893328239] [2021-06-05 04:02:01,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:02:01,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:01,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:02:01,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:02:01,658 INFO L87 Difference]: Start difference. First operand 49583 states and 159923 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:02,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:02,645 INFO L93 Difference]: Finished difference Result 57818 states and 185104 transitions. [2021-06-05 04:02:02,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 04:02:02,646 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:02:02,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:02,745 INFO L225 Difference]: With dead ends: 57818 [2021-06-05 04:02:02,745 INFO L226 Difference]: Without dead ends: 57798 [2021-06-05 04:02:02,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 568.0ms TimeCoverageRelationStatistics Valid=1171, Invalid=4379, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 04:02:02,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57798 states. [2021-06-05 04:02:03,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57798 to 49898. [2021-06-05 04:02:03,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49898 states, 49897 states have (on average 3.2229592961500693) internal successors, (160816), 49897 states have internal predecessors, (160816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:03,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49898 states to 49898 states and 160816 transitions. [2021-06-05 04:02:03,819 INFO L78 Accepts]: Start accepts. Automaton has 49898 states and 160816 transitions. Word has length 26 [2021-06-05 04:02:03,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:03,819 INFO L482 AbstractCegarLoop]: Abstraction has 49898 states and 160816 transitions. [2021-06-05 04:02:03,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:03,819 INFO L276 IsEmpty]: Start isEmpty. Operand 49898 states and 160816 transitions. [2021-06-05 04:02:03,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:02:03,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:03,886 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:04,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 570 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1011 [2021-06-05 04:02:04,089 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:04,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:04,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1458573609, now seen corresponding path program 567 times [2021-06-05 04:02:04,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:04,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110885665] [2021-06-05 04:02:04,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:04,168 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:04,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:04,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110885665] [2021-06-05 04:02:04,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110885665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:04,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022483730] [2021-06-05 04:02:04,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:04,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:02:04,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:04,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:02:04,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:04,331 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:04,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022483730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:04,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:04,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 04:02:04,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360825542] [2021-06-05 04:02:04,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:02:04,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:04,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:02:04,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:02:04,332 INFO L87 Difference]: Start difference. First operand 49898 states and 160816 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:05,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:05,352 INFO L93 Difference]: Finished difference Result 58044 states and 185269 transitions. [2021-06-05 04:02:05,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 04:02:05,352 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:02:05,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:05,490 INFO L225 Difference]: With dead ends: 58044 [2021-06-05 04:02:05,490 INFO L226 Difference]: Without dead ends: 58020 [2021-06-05 04:02:05,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 592.0ms TimeCoverageRelationStatistics Valid=1034, Invalid=3796, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 04:02:05,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58020 states. [2021-06-05 04:02:06,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58020 to 49955. [2021-06-05 04:02:06,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49955 states, 49954 states have (on average 3.222244464907715) internal successors, (160964), 49954 states have internal predecessors, (160964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:06,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49955 states to 49955 states and 160964 transitions. [2021-06-05 04:02:06,666 INFO L78 Accepts]: Start accepts. Automaton has 49955 states and 160964 transitions. Word has length 26 [2021-06-05 04:02:06,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:06,666 INFO L482 AbstractCegarLoop]: Abstraction has 49955 states and 160964 transitions. [2021-06-05 04:02:06,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:06,666 INFO L276 IsEmpty]: Start isEmpty. Operand 49955 states and 160964 transitions. [2021-06-05 04:02:06,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:02:06,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:06,725 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:06,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1012 [2021-06-05 04:02:06,926 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:06,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:06,926 INFO L82 PathProgramCache]: Analyzing trace with hash -774987693, now seen corresponding path program 568 times [2021-06-05 04:02:06,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:06,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043502063] [2021-06-05 04:02:06,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:07,156 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:07,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:07,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043502063] [2021-06-05 04:02:07,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043502063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:07,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620805169] [2021-06-05 04:02:07,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:07,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:02:07,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:07,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:02:07,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:07,311 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:07,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620805169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:07,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:07,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 04:02:07,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184015591] [2021-06-05 04:02:07,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:02:07,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:07,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:02:07,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:02:07,312 INFO L87 Difference]: Start difference. First operand 49955 states and 160964 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:07,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:07,885 INFO L93 Difference]: Finished difference Result 53108 states and 169486 transitions. [2021-06-05 04:02:07,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 04:02:07,886 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:02:07,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:07,992 INFO L225 Difference]: With dead ends: 53108 [2021-06-05 04:02:07,992 INFO L226 Difference]: Without dead ends: 53094 [2021-06-05 04:02:07,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 586.2ms TimeCoverageRelationStatistics Valid=776, Invalid=2646, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 04:02:08,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53094 states. [2021-06-05 04:02:08,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53094 to 49955. [2021-06-05 04:02:08,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49955 states, 49954 states have (on average 3.22210433598911) internal successors, (160957), 49954 states have internal predecessors, (160957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:08,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49955 states to 49955 states and 160957 transitions. [2021-06-05 04:02:08,986 INFO L78 Accepts]: Start accepts. Automaton has 49955 states and 160957 transitions. Word has length 26 [2021-06-05 04:02:08,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:08,986 INFO L482 AbstractCegarLoop]: Abstraction has 49955 states and 160957 transitions. [2021-06-05 04:02:08,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:08,986 INFO L276 IsEmpty]: Start isEmpty. Operand 49955 states and 160957 transitions. [2021-06-05 04:02:09,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:02:09,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:09,046 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:09,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1013 [2021-06-05 04:02:09,247 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:09,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:09,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1068611881, now seen corresponding path program 569 times [2021-06-05 04:02:09,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:09,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067084336] [2021-06-05 04:02:09,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:09,437 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:09,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:09,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067084336] [2021-06-05 04:02:09,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067084336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:09,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875203701] [2021-06-05 04:02:09,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:09,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:02:09,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:09,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:02:09,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:09,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875203701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:09,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:09,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-06-05 04:02:09,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129178460] [2021-06-05 04:02:09,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:02:09,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:09,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:02:09,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:02:09,582 INFO L87 Difference]: Start difference. First operand 49955 states and 160957 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:09,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:09,948 INFO L93 Difference]: Finished difference Result 52810 states and 168954 transitions. [2021-06-05 04:02:09,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:02:09,949 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:02:09,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:10,053 INFO L225 Difference]: With dead ends: 52810 [2021-06-05 04:02:10,053 INFO L226 Difference]: Without dead ends: 52794 [2021-06-05 04:02:10,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 362.2ms TimeCoverageRelationStatistics Valid=372, Invalid=1110, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:02:10,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52794 states. [2021-06-05 04:02:10,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52794 to 49955. [2021-06-05 04:02:10,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49955 states, 49954 states have (on average 3.2220843175721665) internal successors, (160956), 49954 states have internal predecessors, (160956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:11,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49955 states to 49955 states and 160956 transitions. [2021-06-05 04:02:11,104 INFO L78 Accepts]: Start accepts. Automaton has 49955 states and 160956 transitions. Word has length 26 [2021-06-05 04:02:11,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:11,104 INFO L482 AbstractCegarLoop]: Abstraction has 49955 states and 160956 transitions. [2021-06-05 04:02:11,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:11,104 INFO L276 IsEmpty]: Start isEmpty. Operand 49955 states and 160956 transitions. [2021-06-05 04:02:11,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:02:11,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:11,162 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:11,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1014,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:11,377 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:11,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:11,377 INFO L82 PathProgramCache]: Analyzing trace with hash 128540683, now seen corresponding path program 570 times [2021-06-05 04:02:11,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:11,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608506227] [2021-06-05 04:02:11,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:11,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:11,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608506227] [2021-06-05 04:02:11,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608506227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:11,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527504404] [2021-06-05 04:02:11,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:11,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:02:11,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:11,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:02:11,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:11,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527504404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:11,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:11,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2021-06-05 04:02:11,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312173402] [2021-06-05 04:02:11,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:02:11,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:11,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:02:11,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:02:11,594 INFO L87 Difference]: Start difference. First operand 49955 states and 160956 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:12,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:12,573 INFO L93 Difference]: Finished difference Result 53881 states and 172251 transitions. [2021-06-05 04:02:12,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 04:02:12,573 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:02:12,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:12,683 INFO L225 Difference]: With dead ends: 53881 [2021-06-05 04:02:12,683 INFO L226 Difference]: Without dead ends: 53881 [2021-06-05 04:02:12,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 590.6ms TimeCoverageRelationStatistics Valid=1812, Invalid=3738, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 04:02:12,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53881 states. [2021-06-05 04:02:13,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53881 to 50067. [2021-06-05 04:02:13,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50067 states, 50066 states have (on average 3.221587504494068) internal successors, (161292), 50066 states have internal predecessors, (161292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:13,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50067 states to 50067 states and 161292 transitions. [2021-06-05 04:02:13,632 INFO L78 Accepts]: Start accepts. Automaton has 50067 states and 161292 transitions. Word has length 26 [2021-06-05 04:02:13,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:13,632 INFO L482 AbstractCegarLoop]: Abstraction has 50067 states and 161292 transitions. [2021-06-05 04:02:13,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:13,632 INFO L276 IsEmpty]: Start isEmpty. Operand 50067 states and 161292 transitions. [2021-06-05 04:02:13,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:02:13,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:13,691 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:13,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1015 [2021-06-05 04:02:13,892 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:13,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:13,892 INFO L82 PathProgramCache]: Analyzing trace with hash 148442891, now seen corresponding path program 571 times [2021-06-05 04:02:13,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:13,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324574804] [2021-06-05 04:02:13,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:13,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:13,958 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:13,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:13,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324574804] [2021-06-05 04:02:13,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324574804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:13,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107347453] [2021-06-05 04:02:13,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:13,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:02:13,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:14,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107347453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:14,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:14,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-06-05 04:02:14,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641673471] [2021-06-05 04:02:14,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:02:14,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:14,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:02:14,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:02:14,091 INFO L87 Difference]: Start difference. First operand 50067 states and 161292 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:14,343 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 04:02:15,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:15,103 INFO L93 Difference]: Finished difference Result 54829 states and 174767 transitions. [2021-06-05 04:02:15,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 04:02:15,103 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:02:15,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:15,203 INFO L225 Difference]: With dead ends: 54829 [2021-06-05 04:02:15,203 INFO L226 Difference]: Without dead ends: 54811 [2021-06-05 04:02:15,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 705.2ms TimeCoverageRelationStatistics Valid=1414, Invalid=3008, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 04:02:15,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54811 states. [2021-06-05 04:02:16,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54811 to 50138. [2021-06-05 04:02:16,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50138 states, 50137 states have (on average 3.2211939286355387) internal successors, (161501), 50137 states have internal predecessors, (161501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:16,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50138 states to 50138 states and 161501 transitions. [2021-06-05 04:02:16,219 INFO L78 Accepts]: Start accepts. Automaton has 50138 states and 161501 transitions. Word has length 26 [2021-06-05 04:02:16,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:16,219 INFO L482 AbstractCegarLoop]: Abstraction has 50138 states and 161501 transitions. [2021-06-05 04:02:16,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:16,219 INFO L276 IsEmpty]: Start isEmpty. Operand 50138 states and 161501 transitions. [2021-06-05 04:02:16,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:02:16,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:16,283 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:16,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1016,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:16,484 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:16,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:16,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1534558219, now seen corresponding path program 572 times [2021-06-05 04:02:16,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:16,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501385873] [2021-06-05 04:02:16,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:16,560 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:16,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:16,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501385873] [2021-06-05 04:02:16,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501385873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:16,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444370655] [2021-06-05 04:02:16,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:16,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:02:16,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:16,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:02:16,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:16,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444370655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:16,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:16,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-06-05 04:02:16,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640151720] [2021-06-05 04:02:16,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:02:16,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:16,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:02:16,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:02:16,705 INFO L87 Difference]: Start difference. First operand 50138 states and 161501 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:17,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:17,647 INFO L93 Difference]: Finished difference Result 54497 states and 173635 transitions. [2021-06-05 04:02:17,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 04:02:17,648 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:02:17,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:17,748 INFO L225 Difference]: With dead ends: 54497 [2021-06-05 04:02:17,748 INFO L226 Difference]: Without dead ends: 54469 [2021-06-05 04:02:17,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 498.4ms TimeCoverageRelationStatistics Valid=1210, Invalid=2696, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 04:02:17,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54469 states. [2021-06-05 04:02:18,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54469 to 50238. [2021-06-05 04:02:18,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50238 states, 50237 states have (on average 3.220554571331887) internal successors, (161791), 50237 states have internal predecessors, (161791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:18,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50238 states to 50238 states and 161791 transitions. [2021-06-05 04:02:18,744 INFO L78 Accepts]: Start accepts. Automaton has 50238 states and 161791 transitions. Word has length 26 [2021-06-05 04:02:18,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:18,744 INFO L482 AbstractCegarLoop]: Abstraction has 50238 states and 161791 transitions. [2021-06-05 04:02:18,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:18,744 INFO L276 IsEmpty]: Start isEmpty. Operand 50238 states and 161791 transitions. [2021-06-05 04:02:18,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:02:18,804 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:18,804 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:19,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1017 [2021-06-05 04:02:19,005 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:19,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:19,005 INFO L82 PathProgramCache]: Analyzing trace with hash -221843701, now seen corresponding path program 573 times [2021-06-05 04:02:19,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:19,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856068228] [2021-06-05 04:02:19,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:19,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:19,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856068228] [2021-06-05 04:02:19,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856068228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:19,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237869524] [2021-06-05 04:02:19,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:19,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:02:19,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:19,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:02:19,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:19,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237869524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:19,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:19,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-06-05 04:02:19,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815969612] [2021-06-05 04:02:19,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:02:19,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:19,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:02:19,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:02:19,208 INFO L87 Difference]: Start difference. First operand 50238 states and 161791 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:20,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:20,472 INFO L93 Difference]: Finished difference Result 54434 states and 173222 transitions. [2021-06-05 04:02:20,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 04:02:20,473 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:02:20,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:20,581 INFO L225 Difference]: With dead ends: 54434 [2021-06-05 04:02:20,581 INFO L226 Difference]: Without dead ends: 54416 [2021-06-05 04:02:20,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1876 ImplicationChecksByTransitivity, 922.1ms TimeCoverageRelationStatistics Valid=2147, Invalid=4659, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 04:02:20,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54416 states. [2021-06-05 04:02:21,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54416 to 50458. [2021-06-05 04:02:21,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50458 states, 50457 states have (on average 3.219057811601958) internal successors, (162424), 50457 states have internal predecessors, (162424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:21,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50458 states to 50458 states and 162424 transitions. [2021-06-05 04:02:21,606 INFO L78 Accepts]: Start accepts. Automaton has 50458 states and 162424 transitions. Word has length 26 [2021-06-05 04:02:21,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:21,606 INFO L482 AbstractCegarLoop]: Abstraction has 50458 states and 162424 transitions. [2021-06-05 04:02:21,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:21,606 INFO L276 IsEmpty]: Start isEmpty. Operand 50458 states and 162424 transitions. [2021-06-05 04:02:21,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:02:21,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:21,667 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:21,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1018,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:21,867 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:21,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:21,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1941069813, now seen corresponding path program 574 times [2021-06-05 04:02:21,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:21,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209654161] [2021-06-05 04:02:21,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:21,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:21,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209654161] [2021-06-05 04:02:21,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209654161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:21,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108277602] [2021-06-05 04:02:21,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:22,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:02:22,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:22,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:02:22,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:22,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108277602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:22,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:22,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-06-05 04:02:22,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787879893] [2021-06-05 04:02:22,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:02:22,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:22,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:02:22,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:02:22,256 INFO L87 Difference]: Start difference. First operand 50458 states and 162424 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:23,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:23,636 INFO L93 Difference]: Finished difference Result 54967 states and 174638 transitions. [2021-06-05 04:02:23,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 04:02:23,637 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:02:23,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:23,748 INFO L225 Difference]: With dead ends: 54967 [2021-06-05 04:02:23,748 INFO L226 Difference]: Without dead ends: 54957 [2021-06-05 04:02:23,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2646 ImplicationChecksByTransitivity, 968.3ms TimeCoverageRelationStatistics Valid=2993, Invalid=6319, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 04:02:23,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54957 states. [2021-06-05 04:02:24,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54957 to 50789. [2021-06-05 04:02:24,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50789 states, 50788 states have (on average 3.217334803496889) internal successors, (163402), 50788 states have internal predecessors, (163402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:24,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50789 states to 50789 states and 163402 transitions. [2021-06-05 04:02:24,966 INFO L78 Accepts]: Start accepts. Automaton has 50789 states and 163402 transitions. Word has length 26 [2021-06-05 04:02:24,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:24,966 INFO L482 AbstractCegarLoop]: Abstraction has 50789 states and 163402 transitions. [2021-06-05 04:02:24,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:24,966 INFO L276 IsEmpty]: Start isEmpty. Operand 50789 states and 163402 transitions. [2021-06-05 04:02:25,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:02:25,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:25,035 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:25,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 578 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1019 [2021-06-05 04:02:25,236 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:25,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:25,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1051512587, now seen corresponding path program 575 times [2021-06-05 04:02:25,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:25,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266328645] [2021-06-05 04:02:25,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:25,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:25,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266328645] [2021-06-05 04:02:25,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266328645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:25,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101830170] [2021-06-05 04:02:25,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:25,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:02:25,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:25,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:02:25,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:25,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101830170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:25,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:25,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-06-05 04:02:25,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106853802] [2021-06-05 04:02:25,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:02:25,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:25,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:02:25,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=437, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:02:25,458 INFO L87 Difference]: Start difference. First operand 50789 states and 163402 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:27,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:27,204 INFO L93 Difference]: Finished difference Result 56559 states and 179353 transitions. [2021-06-05 04:02:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 04:02:27,204 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:02:27,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:27,310 INFO L225 Difference]: With dead ends: 56559 [2021-06-05 04:02:27,310 INFO L226 Difference]: Without dead ends: 56555 [2021-06-05 04:02:27,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2956 ImplicationChecksByTransitivity, 1040.6ms TimeCoverageRelationStatistics Valid=3487, Invalid=7019, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 04:02:27,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56555 states. [2021-06-05 04:02:28,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56555 to 51049. [2021-06-05 04:02:28,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51049 states, 51048 states have (on average 3.21534634069895) internal successors, (164137), 51048 states have internal predecessors, (164137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:28,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51049 states to 51049 states and 164137 transitions. [2021-06-05 04:02:28,314 INFO L78 Accepts]: Start accepts. Automaton has 51049 states and 164137 transitions. Word has length 26 [2021-06-05 04:02:28,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:28,314 INFO L482 AbstractCegarLoop]: Abstraction has 51049 states and 164137 transitions. [2021-06-05 04:02:28,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:28,314 INFO L276 IsEmpty]: Start isEmpty. Operand 51049 states and 164137 transitions. [2021-06-05 04:02:28,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:02:28,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:28,375 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:28,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1020,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:28,575 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:28,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:28,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1009500171, now seen corresponding path program 576 times [2021-06-05 04:02:28,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:28,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610235886] [2021-06-05 04:02:28,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:28,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:28,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610235886] [2021-06-05 04:02:28,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610235886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:28,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264515162] [2021-06-05 04:02:28,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:28,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:02:28,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:28,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:02:28,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:28,794 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:28,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264515162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:28,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:28,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-06-05 04:02:28,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510416293] [2021-06-05 04:02:28,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:02:28,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:28,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:02:28,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:02:28,795 INFO L87 Difference]: Start difference. First operand 51049 states and 164137 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:29,903 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2021-06-05 04:02:30,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:30,273 INFO L93 Difference]: Finished difference Result 57225 states and 181814 transitions. [2021-06-05 04:02:30,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 04:02:30,274 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:02:30,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:30,376 INFO L225 Difference]: With dead ends: 57225 [2021-06-05 04:02:30,376 INFO L226 Difference]: Without dead ends: 57225 [2021-06-05 04:02:30,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2646 ImplicationChecksByTransitivity, 1081.2ms TimeCoverageRelationStatistics Valid=3387, Invalid=6315, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 04:02:30,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57225 states. [2021-06-05 04:02:31,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57225 to 51568. [2021-06-05 04:02:31,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51568 states, 51567 states have (on average 3.222138189151977) internal successors, (166156), 51567 states have internal predecessors, (166156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:31,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51568 states to 51568 states and 166156 transitions. [2021-06-05 04:02:31,463 INFO L78 Accepts]: Start accepts. Automaton has 51568 states and 166156 transitions. Word has length 26 [2021-06-05 04:02:31,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:31,464 INFO L482 AbstractCegarLoop]: Abstraction has 51568 states and 166156 transitions. [2021-06-05 04:02:31,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:31,464 INFO L276 IsEmpty]: Start isEmpty. Operand 51568 states and 166156 transitions. [2021-06-05 04:02:31,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:02:31,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:31,524 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:31,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1021,580 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:31,724 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:31,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:31,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1580954977, now seen corresponding path program 577 times [2021-06-05 04:02:31,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:31,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624575992] [2021-06-05 04:02:31,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:02:31,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:31,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624575992] [2021-06-05 04:02:31,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624575992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:31,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929719141] [2021-06-05 04:02:31,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:31,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:02:31,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:31,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929719141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:31,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:31,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-06-05 04:02:31,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295391607] [2021-06-05 04:02:31,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:02:31,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:31,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:02:31,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:02:31,929 INFO L87 Difference]: Start difference. First operand 51568 states and 166156 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:32,564 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 9 [2021-06-05 04:02:33,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:33,527 INFO L93 Difference]: Finished difference Result 54451 states and 173513 transitions. [2021-06-05 04:02:33,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 04:02:33,530 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:02:33,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:33,634 INFO L225 Difference]: With dead ends: 54451 [2021-06-05 04:02:33,634 INFO L226 Difference]: Without dead ends: 54433 [2021-06-05 04:02:33,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3450 ImplicationChecksByTransitivity, 1228.5ms TimeCoverageRelationStatistics Valid=4100, Invalid=8332, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 04:02:33,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54433 states. [2021-06-05 04:02:34,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54433 to 50138. [2021-06-05 04:02:34,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50138 states, 50137 states have (on average 3.2168657877415883) internal successors, (161284), 50137 states have internal predecessors, (161284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:34,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50138 states to 50138 states and 161284 transitions. [2021-06-05 04:02:34,657 INFO L78 Accepts]: Start accepts. Automaton has 50138 states and 161284 transitions. Word has length 26 [2021-06-05 04:02:34,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:34,658 INFO L482 AbstractCegarLoop]: Abstraction has 50138 states and 161284 transitions. [2021-06-05 04:02:34,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:34,658 INFO L276 IsEmpty]: Start isEmpty. Operand 50138 states and 161284 transitions. [2021-06-05 04:02:34,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:02:34,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:34,724 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:34,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1022,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:34,925 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:34,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:34,925 INFO L82 PathProgramCache]: Analyzing trace with hash 2116184779, now seen corresponding path program 578 times [2021-06-05 04:02:34,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:34,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667277313] [2021-06-05 04:02:34,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:34,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:34,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667277313] [2021-06-05 04:02:34,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667277313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:34,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245164123] [2021-06-05 04:02:34,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:35,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:02:35,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:35,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:02:35,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:35,148 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:35,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245164123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:35,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:35,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2021-06-05 04:02:35,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941937195] [2021-06-05 04:02:35,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:02:35,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:35,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:02:35,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:02:35,149 INFO L87 Difference]: Start difference. First operand 50138 states and 161284 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:36,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:36,629 INFO L93 Difference]: Finished difference Result 52941 states and 168695 transitions. [2021-06-05 04:02:36,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 04:02:36,629 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:02:36,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:36,733 INFO L225 Difference]: With dead ends: 52941 [2021-06-05 04:02:36,734 INFO L226 Difference]: Without dead ends: 52929 [2021-06-05 04:02:36,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3698 ImplicationChecksByTransitivity, 991.3ms TimeCoverageRelationStatistics Valid=4157, Invalid=8499, Unknown=0, NotChecked=0, Total=12656 [2021-06-05 04:02:36,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52929 states. [2021-06-05 04:02:37,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52929 to 50257. [2021-06-05 04:02:37,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50257 states, 50256 states have (on average 3.216292581980261) internal successors, (161638), 50256 states have internal predecessors, (161638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:37,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50257 states to 50257 states and 161638 transitions. [2021-06-05 04:02:37,831 INFO L78 Accepts]: Start accepts. Automaton has 50257 states and 161638 transitions. Word has length 26 [2021-06-05 04:02:37,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:37,831 INFO L482 AbstractCegarLoop]: Abstraction has 50257 states and 161638 transitions. [2021-06-05 04:02:37,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:37,831 INFO L276 IsEmpty]: Start isEmpty. Operand 50257 states and 161638 transitions. [2021-06-05 04:02:37,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:02:37,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:37,893 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:38,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1023 [2021-06-05 04:02:38,100 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:38,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:38,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1345931095, now seen corresponding path program 579 times [2021-06-05 04:02:38,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:38,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594336058] [2021-06-05 04:02:38,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:38,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:38,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:38,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594336058] [2021-06-05 04:02:38,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594336058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:38,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999377852] [2021-06-05 04:02:38,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:38,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:02:38,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:38,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:02:38,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:38,488 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:38,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999377852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:38,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:38,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2021-06-05 04:02:38,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584176644] [2021-06-05 04:02:38,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 04:02:38,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:38,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 04:02:38,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:02:38,489 INFO L87 Difference]: Start difference. First operand 50257 states and 161638 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:39,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:39,489 INFO L93 Difference]: Finished difference Result 54325 states and 173260 transitions. [2021-06-05 04:02:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 04:02:39,490 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:02:39,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:39,586 INFO L225 Difference]: With dead ends: 54325 [2021-06-05 04:02:39,586 INFO L226 Difference]: Without dead ends: 54325 [2021-06-05 04:02:39,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2085 ImplicationChecksByTransitivity, 692.4ms TimeCoverageRelationStatistics Valid=2083, Invalid=4559, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 04:02:39,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54325 states. [2021-06-05 04:02:40,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54325 to 50201. [2021-06-05 04:02:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50201 states, 50200 states have (on average 3.216533864541833) internal successors, (161470), 50200 states have internal predecessors, (161470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:40,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50201 states to 50201 states and 161470 transitions. [2021-06-05 04:02:40,585 INFO L78 Accepts]: Start accepts. Automaton has 50201 states and 161470 transitions. Word has length 26 [2021-06-05 04:02:40,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:40,586 INFO L482 AbstractCegarLoop]: Abstraction has 50201 states and 161470 transitions. [2021-06-05 04:02:40,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:40,586 INFO L276 IsEmpty]: Start isEmpty. Operand 50201 states and 161470 transitions. [2021-06-05 04:02:40,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:02:40,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:40,644 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:40,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1024 [2021-06-05 04:02:40,845 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:40,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:40,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1794574897, now seen corresponding path program 580 times [2021-06-05 04:02:40,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:40,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64442872] [2021-06-05 04:02:40,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:40,910 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:40,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:40,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64442872] [2021-06-05 04:02:40,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64442872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:40,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363039502] [2021-06-05 04:02:40,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:40,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:02:40,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:40,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:02:40,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:41,102 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 04:02:41,170 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:41,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363039502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:41,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:41,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 26 [2021-06-05 04:02:41,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172917434] [2021-06-05 04:02:41,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:02:41,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:41,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:02:41,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:02:41,171 INFO L87 Difference]: Start difference. First operand 50201 states and 161470 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:42,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:42,063 INFO L93 Difference]: Finished difference Result 54878 states and 174672 transitions. [2021-06-05 04:02:42,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 04:02:42,064 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:02:42,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:42,159 INFO L225 Difference]: With dead ends: 54878 [2021-06-05 04:02:42,159 INFO L226 Difference]: Without dead ends: 54860 [2021-06-05 04:02:42,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 728.4ms TimeCoverageRelationStatistics Valid=1654, Invalid=3748, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 04:02:42,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54860 states. [2021-06-05 04:02:43,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54860 to 50207. [2021-06-05 04:02:43,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50207 states, 50206 states have (on average 3.216388479464606) internal successors, (161482), 50206 states have internal predecessors, (161482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:43,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50207 states to 50207 states and 161482 transitions. [2021-06-05 04:02:43,203 INFO L78 Accepts]: Start accepts. Automaton has 50207 states and 161482 transitions. Word has length 26 [2021-06-05 04:02:43,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:43,203 INFO L482 AbstractCegarLoop]: Abstraction has 50207 states and 161482 transitions. [2021-06-05 04:02:43,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:43,203 INFO L276 IsEmpty]: Start isEmpty. Operand 50207 states and 161482 transitions. [2021-06-05 04:02:43,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:02:43,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:43,261 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:43,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 584 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1025 [2021-06-05 04:02:43,462 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:43,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:43,462 INFO L82 PathProgramCache]: Analyzing trace with hash -926050217, now seen corresponding path program 581 times [2021-06-05 04:02:43,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:43,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380540102] [2021-06-05 04:02:43,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:43,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:43,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:43,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380540102] [2021-06-05 04:02:43,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380540102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:43,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294492622] [2021-06-05 04:02:43,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:43,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:02:43,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:43,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:02:43,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:43,690 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:43,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294492622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:43,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:43,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-06-05 04:02:43,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452563087] [2021-06-05 04:02:43,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:02:43,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:43,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:02:43,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:02:43,691 INFO L87 Difference]: Start difference. First operand 50207 states and 161482 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:44,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:44,731 INFO L93 Difference]: Finished difference Result 55305 states and 175642 transitions. [2021-06-05 04:02:44,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 04:02:44,731 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:02:44,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:44,829 INFO L225 Difference]: With dead ends: 55305 [2021-06-05 04:02:44,830 INFO L226 Difference]: Without dead ends: 55291 [2021-06-05 04:02:44,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 773.6ms TimeCoverageRelationStatistics Valid=1702, Invalid=3848, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 04:02:44,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55291 states. [2021-06-05 04:02:45,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55291 to 50371. [2021-06-05 04:02:45,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50371 states, 50370 states have (on average 3.215525114155251) internal successors, (161966), 50370 states have internal predecessors, (161966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:45,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50371 states to 50371 states and 161966 transitions. [2021-06-05 04:02:45,875 INFO L78 Accepts]: Start accepts. Automaton has 50371 states and 161966 transitions. Word has length 26 [2021-06-05 04:02:45,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:45,875 INFO L482 AbstractCegarLoop]: Abstraction has 50371 states and 161966 transitions. [2021-06-05 04:02:45,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:45,875 INFO L276 IsEmpty]: Start isEmpty. Operand 50371 states and 161966 transitions. [2021-06-05 04:02:45,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:02:45,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:45,933 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:46,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1026 [2021-06-05 04:02:46,134 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:46,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:46,134 INFO L82 PathProgramCache]: Analyzing trace with hash -2144959281, now seen corresponding path program 582 times [2021-06-05 04:02:46,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:46,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376318483] [2021-06-05 04:02:46,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:46,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:46,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376318483] [2021-06-05 04:02:46,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376318483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:46,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734698016] [2021-06-05 04:02:46,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:46,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:02:46,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:46,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:02:46,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:46,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734698016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:46,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:46,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-06-05 04:02:46,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620761192] [2021-06-05 04:02:46,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:02:46,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:46,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:02:46,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:02:46,342 INFO L87 Difference]: Start difference. First operand 50371 states and 161966 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:47,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:47,481 INFO L93 Difference]: Finished difference Result 53970 states and 171749 transitions. [2021-06-05 04:02:47,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 04:02:47,481 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:02:47,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:47,579 INFO L225 Difference]: With dead ends: 53970 [2021-06-05 04:02:47,579 INFO L226 Difference]: Without dead ends: 53952 [2021-06-05 04:02:47,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 826.6ms TimeCoverageRelationStatistics Valid=1778, Invalid=3922, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 04:02:47,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53952 states. [2021-06-05 04:02:48,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53952 to 50515. [2021-06-05 04:02:48,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50515 states, 50514 states have (on average 3.2141782476145226) internal successors, (162361), 50514 states have internal predecessors, (162361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:48,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50515 states to 50515 states and 162361 transitions. [2021-06-05 04:02:48,663 INFO L78 Accepts]: Start accepts. Automaton has 50515 states and 162361 transitions. Word has length 26 [2021-06-05 04:02:48,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:48,664 INFO L482 AbstractCegarLoop]: Abstraction has 50515 states and 162361 transitions. [2021-06-05 04:02:48,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:48,664 INFO L276 IsEmpty]: Start isEmpty. Operand 50515 states and 162361 transitions. [2021-06-05 04:02:48,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:02:48,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:48,724 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:48,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1027,586 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:48,924 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:48,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:48,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1279404375, now seen corresponding path program 583 times [2021-06-05 04:02:48,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:48,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078517171] [2021-06-05 04:02:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:48,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:48,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078517171] [2021-06-05 04:02:48,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078517171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:48,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558124841] [2021-06-05 04:02:48,983 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:49,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:49,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:02:49,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:49,124 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:49,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558124841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:49,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:49,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-06-05 04:02:49,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342582411] [2021-06-05 04:02:49,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:02:49,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:49,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:02:49,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:02:49,125 INFO L87 Difference]: Start difference. First operand 50515 states and 162361 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:50,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:50,512 INFO L93 Difference]: Finished difference Result 56152 states and 177994 transitions. [2021-06-05 04:02:50,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 04:02:50,512 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:02:50,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:50,618 INFO L225 Difference]: With dead ends: 56152 [2021-06-05 04:02:50,618 INFO L226 Difference]: Without dead ends: 56142 [2021-06-05 04:02:50,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2161 ImplicationChecksByTransitivity, 862.0ms TimeCoverageRelationStatistics Valid=2618, Invalid=5572, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 04:02:50,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56142 states. [2021-06-05 04:02:51,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56142 to 51019. [2021-06-05 04:02:51,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51019 states, 51018 states have (on average 3.212905249127759) internal successors, (163916), 51018 states have internal predecessors, (163916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:51,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51019 states to 51019 states and 163916 transitions. [2021-06-05 04:02:51,623 INFO L78 Accepts]: Start accepts. Automaton has 51019 states and 163916 transitions. Word has length 26 [2021-06-05 04:02:51,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:51,623 INFO L482 AbstractCegarLoop]: Abstraction has 51019 states and 163916 transitions. [2021-06-05 04:02:51,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:51,623 INFO L276 IsEmpty]: Start isEmpty. Operand 51019 states and 163916 transitions. [2021-06-05 04:02:51,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:02:51,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:51,684 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:51,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 587 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1028 [2021-06-05 04:02:51,885 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:51,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:51,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1666962383, now seen corresponding path program 584 times [2021-06-05 04:02:51,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:51,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301025006] [2021-06-05 04:02:51,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:51,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:51,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301025006] [2021-06-05 04:02:51,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301025006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:51,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469932234] [2021-06-05 04:02:51,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:51,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:02:51,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:51,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:02:51,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:52,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469932234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:52,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:52,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-06-05 04:02:52,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018901481] [2021-06-05 04:02:52,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:02:52,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:52,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:02:52,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:02:52,089 INFO L87 Difference]: Start difference. First operand 51019 states and 163916 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:53,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:53,610 INFO L93 Difference]: Finished difference Result 57976 states and 183349 transitions. [2021-06-05 04:02:53,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 04:02:53,610 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:02:53,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:53,716 INFO L225 Difference]: With dead ends: 57976 [2021-06-05 04:02:53,716 INFO L226 Difference]: Without dead ends: 57972 [2021-06-05 04:02:53,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2639 ImplicationChecksByTransitivity, 1112.9ms TimeCoverageRelationStatistics Valid=3212, Invalid=6490, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 04:02:53,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57972 states. [2021-06-05 04:02:54,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57972 to 51503. [2021-06-05 04:02:54,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51503 states, 51502 states have (on average 3.2117976000932003) internal successors, (165414), 51502 states have internal predecessors, (165414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:54,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51503 states to 51503 states and 165414 transitions. [2021-06-05 04:02:54,837 INFO L78 Accepts]: Start accepts. Automaton has 51503 states and 165414 transitions. Word has length 26 [2021-06-05 04:02:54,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:54,837 INFO L482 AbstractCegarLoop]: Abstraction has 51503 states and 165414 transitions. [2021-06-05 04:02:54,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:54,837 INFO L276 IsEmpty]: Start isEmpty. Operand 51503 states and 165414 transitions. [2021-06-05 04:02:54,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:02:54,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:54,898 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:55,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1029,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:55,098 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:55,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:55,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1784219049, now seen corresponding path program 585 times [2021-06-05 04:02:55,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:55,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023534300] [2021-06-05 04:02:55,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:55,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:55,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023534300] [2021-06-05 04:02:55,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023534300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:55,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83013716] [2021-06-05 04:02:55,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:55,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 04:02:55,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:55,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:02:55,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:55,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83013716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:55,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:55,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-06-05 04:02:55,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341099454] [2021-06-05 04:02:55,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:02:55,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:55,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:02:55,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:02:55,311 INFO L87 Difference]: Start difference. First operand 51503 states and 165414 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:56,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:56,785 INFO L93 Difference]: Finished difference Result 58507 states and 185313 transitions. [2021-06-05 04:02:56,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 04:02:56,785 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:02:56,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:56,894 INFO L225 Difference]: With dead ends: 58507 [2021-06-05 04:02:56,894 INFO L226 Difference]: Without dead ends: 58507 [2021-06-05 04:02:56,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2493 ImplicationChecksByTransitivity, 887.8ms TimeCoverageRelationStatistics Valid=3241, Invalid=6071, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 04:02:56,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58507 states. [2021-06-05 04:02:57,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58507 to 51747. [2021-06-05 04:02:57,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51747 states, 51746 states have (on average 3.2176013604916323) internal successors, (166498), 51746 states have internal predecessors, (166498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:57,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51747 states to 51747 states and 166498 transitions. [2021-06-05 04:02:57,942 INFO L78 Accepts]: Start accepts. Automaton has 51747 states and 166498 transitions. Word has length 26 [2021-06-05 04:02:57,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:57,942 INFO L482 AbstractCegarLoop]: Abstraction has 51747 states and 166498 transitions. [2021-06-05 04:02:57,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:57,942 INFO L276 IsEmpty]: Start isEmpty. Operand 51747 states and 166498 transitions. [2021-06-05 04:02:58,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:02:58,001 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:58,001 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:58,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1030,589 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:58,202 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:58,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:58,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1212764243, now seen corresponding path program 586 times [2021-06-05 04:02:58,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:58,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304661521] [2021-06-05 04:02:58,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:58,504 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 04:02:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:02:58,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:58,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304661521] [2021-06-05 04:02:58,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304661521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:58,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418826813] [2021-06-05 04:02:58,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:58,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:02:58,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:58,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:02:58,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:58,667 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:58,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418826813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:58,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:58,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-06-05 04:02:58,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523528571] [2021-06-05 04:02:58,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:02:58,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:58,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:02:58,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:02:58,677 INFO L87 Difference]: Start difference. First operand 51747 states and 166498 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:00,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:00,082 INFO L93 Difference]: Finished difference Result 55635 states and 176710 transitions. [2021-06-05 04:03:00,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 04:03:00,082 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:03:00,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:00,183 INFO L225 Difference]: With dead ends: 55635 [2021-06-05 04:03:00,184 INFO L226 Difference]: Without dead ends: 55620 [2021-06-05 04:03:00,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3718 ImplicationChecksByTransitivity, 1322.5ms TimeCoverageRelationStatistics Valid=4143, Invalid=8967, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 04:03:00,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55620 states. [2021-06-05 04:03:01,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55620 to 50933. [2021-06-05 04:03:01,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50933 states, 50932 states have (on average 3.2139323018927195) internal successors, (163692), 50932 states have internal predecessors, (163692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:01,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50933 states to 50933 states and 163692 transitions. [2021-06-05 04:03:01,403 INFO L78 Accepts]: Start accepts. Automaton has 50933 states and 163692 transitions. Word has length 26 [2021-06-05 04:03:01,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:01,403 INFO L482 AbstractCegarLoop]: Abstraction has 50933 states and 163692 transitions. [2021-06-05 04:03:01,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:01,403 INFO L276 IsEmpty]: Start isEmpty. Operand 50933 states and 163692 transitions. [2021-06-05 04:03:01,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:03:01,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:01,465 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:01,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1031 [2021-06-05 04:03:01,666 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:01,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:01,666 INFO L82 PathProgramCache]: Analyzing trace with hash -677534441, now seen corresponding path program 587 times [2021-06-05 04:03:01,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:01,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948632396] [2021-06-05 04:03:01,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:01,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:01,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948632396] [2021-06-05 04:03:01,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948632396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:01,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271771414] [2021-06-05 04:03:01,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:01,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 04:03:01,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:01,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:03:01,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:01,898 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:01,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271771414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:01,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:01,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 26 [2021-06-05 04:03:01,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752754860] [2021-06-05 04:03:01,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:03:01,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:01,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:03:01,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:03:01,899 INFO L87 Difference]: Start difference. First operand 50933 states and 163692 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:03,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:03,343 INFO L93 Difference]: Finished difference Result 55063 states and 174795 transitions. [2021-06-05 04:03:03,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 04:03:03,344 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:03:03,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:03,448 INFO L225 Difference]: With dead ends: 55063 [2021-06-05 04:03:03,448 INFO L226 Difference]: Without dead ends: 55033 [2021-06-05 04:03:03,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3799 ImplicationChecksByTransitivity, 1137.5ms TimeCoverageRelationStatistics Valid=4019, Invalid=8863, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 04:03:03,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55033 states. [2021-06-05 04:03:04,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55033 to 50491. [2021-06-05 04:03:04,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50491 states, 50490 states have (on average 3.2159833630421866) internal successors, (162375), 50490 states have internal predecessors, (162375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:04,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50491 states to 50491 states and 162375 transitions. [2021-06-05 04:03:04,617 INFO L78 Accepts]: Start accepts. Automaton has 50491 states and 162375 transitions. Word has length 26 [2021-06-05 04:03:04,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:04,617 INFO L482 AbstractCegarLoop]: Abstraction has 50491 states and 162375 transitions. [2021-06-05 04:03:04,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:04,617 INFO L276 IsEmpty]: Start isEmpty. Operand 50491 states and 162375 transitions. [2021-06-05 04:03:04,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:03:04,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:04,676 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:04,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1032,591 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:04,877 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:04,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:04,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1265279763, now seen corresponding path program 588 times [2021-06-05 04:03:04,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:04,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168818227] [2021-06-05 04:03:04,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:04,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:04,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168818227] [2021-06-05 04:03:04,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168818227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:04,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210173465] [2021-06-05 04:03:04,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:04,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 04:03:04,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:04,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:03:04,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:05,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210173465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:05,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:05,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2021-06-05 04:03:05,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991175969] [2021-06-05 04:03:05,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 04:03:05,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:05,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 04:03:05,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:03:05,108 INFO L87 Difference]: Start difference. First operand 50491 states and 162375 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:06,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:06,488 INFO L93 Difference]: Finished difference Result 54247 states and 172494 transitions. [2021-06-05 04:03:06,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-05 04:03:06,488 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:03:06,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:06,588 INFO L225 Difference]: With dead ends: 54247 [2021-06-05 04:03:06,588 INFO L226 Difference]: Without dead ends: 54229 [2021-06-05 04:03:06,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3930 ImplicationChecksByTransitivity, 987.9ms TimeCoverageRelationStatistics Valid=4022, Invalid=8860, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 04:03:06,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54229 states. [2021-06-05 04:03:07,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54229 to 50570. [2021-06-05 04:03:07,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50570 states, 50569 states have (on average 3.2162194229666397) internal successors, (162641), 50569 states have internal predecessors, (162641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:07,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50570 states to 50570 states and 162641 transitions. [2021-06-05 04:03:07,828 INFO L78 Accepts]: Start accepts. Automaton has 50570 states and 162641 transitions. Word has length 26 [2021-06-05 04:03:07,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:07,828 INFO L482 AbstractCegarLoop]: Abstraction has 50570 states and 162641 transitions. [2021-06-05 04:03:07,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:07,828 INFO L276 IsEmpty]: Start isEmpty. Operand 50570 states and 162641 transitions. [2021-06-05 04:03:07,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:03:07,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:07,891 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:08,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 592 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1033 [2021-06-05 04:03:08,091 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:08,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:08,092 INFO L82 PathProgramCache]: Analyzing trace with hash 430328203, now seen corresponding path program 589 times [2021-06-05 04:03:08,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:08,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773336939] [2021-06-05 04:03:08,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:08,166 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:08,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:08,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773336939] [2021-06-05 04:03:08,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773336939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:08,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705035348] [2021-06-05 04:03:08,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:08,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:03:08,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:08,328 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:08,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705035348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:08,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:08,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-06-05 04:03:08,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519489638] [2021-06-05 04:03:08,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 04:03:08,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:08,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 04:03:08,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:03:08,329 INFO L87 Difference]: Start difference. First operand 50570 states and 162641 transitions. Second operand has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:09,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:09,468 INFO L93 Difference]: Finished difference Result 54132 states and 172702 transitions. [2021-06-05 04:03:09,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 04:03:09,468 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:03:09,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:09,561 INFO L225 Difference]: With dead ends: 54132 [2021-06-05 04:03:09,561 INFO L226 Difference]: Without dead ends: 54132 [2021-06-05 04:03:09,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 809.1ms TimeCoverageRelationStatistics Valid=2323, Invalid=5333, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 04:03:09,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54132 states. [2021-06-05 04:03:10,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54132 to 50382. [2021-06-05 04:03:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50382 states, 50381 states have (on average 3.2170064111470595) internal successors, (162076), 50381 states have internal predecessors, (162076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:10,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50382 states to 50382 states and 162076 transitions. [2021-06-05 04:03:10,779 INFO L78 Accepts]: Start accepts. Automaton has 50382 states and 162076 transitions. Word has length 26 [2021-06-05 04:03:10,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:10,779 INFO L482 AbstractCegarLoop]: Abstraction has 50382 states and 162076 transitions. [2021-06-05 04:03:10,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:10,779 INFO L276 IsEmpty]: Start isEmpty. Operand 50382 states and 162076 transitions. [2021-06-05 04:03:10,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:03:10,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:10,838 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:11,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 593 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1034 [2021-06-05 04:03:11,038 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:11,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:11,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1898584181, now seen corresponding path program 590 times [2021-06-05 04:03:11,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:11,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514695450] [2021-06-05 04:03:11,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:11,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:11,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514695450] [2021-06-05 04:03:11,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514695450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:11,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652452790] [2021-06-05 04:03:11,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:11,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:11,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:11,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:03:11,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:11,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652452790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:11,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:11,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 27 [2021-06-05 04:03:11,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417712692] [2021-06-05 04:03:11,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 04:03:11,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:11,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 04:03:11,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:03:11,264 INFO L87 Difference]: Start difference. First operand 50382 states and 162076 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:12,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:12,258 INFO L93 Difference]: Finished difference Result 53723 states and 171238 transitions. [2021-06-05 04:03:12,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 04:03:12,259 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:03:12,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:12,351 INFO L225 Difference]: With dead ends: 53723 [2021-06-05 04:03:12,352 INFO L226 Difference]: Without dead ends: 53705 [2021-06-05 04:03:12,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1875 ImplicationChecksByTransitivity, 691.0ms TimeCoverageRelationStatistics Valid=1864, Invalid=4456, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 04:03:12,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53705 states. [2021-06-05 04:03:13,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53705 to 50224. [2021-06-05 04:03:13,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50224 states, 50223 states have (on average 3.217629372996436) internal successors, (161599), 50223 states have internal predecessors, (161599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:13,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50224 states to 50224 states and 161599 transitions. [2021-06-05 04:03:13,398 INFO L78 Accepts]: Start accepts. Automaton has 50224 states and 161599 transitions. Word has length 26 [2021-06-05 04:03:13,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:13,398 INFO L482 AbstractCegarLoop]: Abstraction has 50224 states and 161599 transitions. [2021-06-05 04:03:13,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:13,398 INFO L276 IsEmpty]: Start isEmpty. Operand 50224 states and 161599 transitions. [2021-06-05 04:03:13,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:03:13,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:13,463 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:13,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 594 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1035 [2021-06-05 04:03:13,663 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:13,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:13,664 INFO L82 PathProgramCache]: Analyzing trace with hash 104499595, now seen corresponding path program 591 times [2021-06-05 04:03:13,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:13,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510031430] [2021-06-05 04:03:13,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:13,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:13,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510031430] [2021-06-05 04:03:13,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510031430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:13,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862182415] [2021-06-05 04:03:13,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:13,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:03:13,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:13,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:03:13,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:14,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862182415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:14,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:14,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 26 [2021-06-05 04:03:14,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018177113] [2021-06-05 04:03:14,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:03:14,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:14,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:03:14,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:03:14,013 INFO L87 Difference]: Start difference. First operand 50224 states and 161599 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:15,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:15,053 INFO L93 Difference]: Finished difference Result 54073 states and 172024 transitions. [2021-06-05 04:03:15,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 04:03:15,054 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:03:15,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:15,157 INFO L225 Difference]: With dead ends: 54073 [2021-06-05 04:03:15,157 INFO L226 Difference]: Without dead ends: 54059 [2021-06-05 04:03:15,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1904 ImplicationChecksByTransitivity, 847.5ms TimeCoverageRelationStatistics Valid=1950, Invalid=4530, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 04:03:15,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54059 states. [2021-06-05 04:03:15,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54059 to 50167. [2021-06-05 04:03:16,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50167 states, 50166 states have (on average 3.2173783040306185) internal successors, (161403), 50166 states have internal predecessors, (161403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:16,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50167 states to 50167 states and 161403 transitions. [2021-06-05 04:03:16,150 INFO L78 Accepts]: Start accepts. Automaton has 50167 states and 161403 transitions. Word has length 26 [2021-06-05 04:03:16,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:16,150 INFO L482 AbstractCegarLoop]: Abstraction has 50167 states and 161403 transitions. [2021-06-05 04:03:16,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:16,150 INFO L276 IsEmpty]: Start isEmpty. Operand 50167 states and 161403 transitions. [2021-06-05 04:03:16,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:03:16,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:16,214 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:16,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 595 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1036 [2021-06-05 04:03:16,414 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:16,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:16,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1632000117, now seen corresponding path program 592 times [2021-06-05 04:03:16,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:16,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459181237] [2021-06-05 04:03:16,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:16,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:16,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:16,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459181237] [2021-06-05 04:03:16,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459181237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:16,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462986905] [2021-06-05 04:03:16,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:16,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:16,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:16,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:03:16,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:16,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462986905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:16,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:16,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 25 [2021-06-05 04:03:16,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507676506] [2021-06-05 04:03:16,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:03:16,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:16,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:03:16,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:03:16,624 INFO L87 Difference]: Start difference. First operand 50167 states and 161403 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:17,051 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 04:03:17,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:17,880 INFO L93 Difference]: Finished difference Result 56139 states and 177968 transitions. [2021-06-05 04:03:17,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 04:03:17,881 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:03:17,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:17,999 INFO L225 Difference]: With dead ends: 56139 [2021-06-05 04:03:18,000 INFO L226 Difference]: Without dead ends: 56129 [2021-06-05 04:03:18,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 924.2ms TimeCoverageRelationStatistics Valid=2181, Invalid=4791, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 04:03:18,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56129 states. [2021-06-05 04:03:18,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56129 to 50617. [2021-06-05 04:03:18,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50617 states, 50616 states have (on average 3.215663031452505) internal successors, (162764), 50616 states have internal predecessors, (162764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50617 states to 50617 states and 162764 transitions. [2021-06-05 04:03:19,069 INFO L78 Accepts]: Start accepts. Automaton has 50617 states and 162764 transitions. Word has length 26 [2021-06-05 04:03:19,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:19,069 INFO L482 AbstractCegarLoop]: Abstraction has 50617 states and 162764 transitions. [2021-06-05 04:03:19,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:19,069 INFO L276 IsEmpty]: Start isEmpty. Operand 50617 states and 162764 transitions. [2021-06-05 04:03:19,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:03:19,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:19,132 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:19,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 596 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1037 [2021-06-05 04:03:19,332 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:19,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:19,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1965110901, now seen corresponding path program 593 times [2021-06-05 04:03:19,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:19,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893285551] [2021-06-05 04:03:19,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:19,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:19,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:19,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893285551] [2021-06-05 04:03:19,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893285551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:19,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302983903] [2021-06-05 04:03:19,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:19,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:03:19,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:19,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:03:19,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:19,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302983903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:19,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:19,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 25 [2021-06-05 04:03:19,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002354981] [2021-06-05 04:03:19,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:03:19,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:19,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:03:19,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:03:19,541 INFO L87 Difference]: Start difference. First operand 50617 states and 162764 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:20,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:20,820 INFO L93 Difference]: Finished difference Result 56110 states and 178059 transitions. [2021-06-05 04:03:20,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 04:03:20,820 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:03:20,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:20,925 INFO L225 Difference]: With dead ends: 56110 [2021-06-05 04:03:20,925 INFO L226 Difference]: Without dead ends: 56100 [2021-06-05 04:03:20,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 948.7ms TimeCoverageRelationStatistics Valid=2319, Invalid=4821, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 04:03:20,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56100 states. [2021-06-05 04:03:21,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56100 to 51005. [2021-06-05 04:03:21,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51005 states, 51004 states have (on average 3.2150811701043054) internal successors, (163982), 51004 states have internal predecessors, (163982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:21,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51005 states to 51005 states and 163982 transitions. [2021-06-05 04:03:21,969 INFO L78 Accepts]: Start accepts. Automaton has 51005 states and 163982 transitions. Word has length 26 [2021-06-05 04:03:21,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:21,969 INFO L482 AbstractCegarLoop]: Abstraction has 51005 states and 163982 transitions. [2021-06-05 04:03:21,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:21,969 INFO L276 IsEmpty]: Start isEmpty. Operand 51005 states and 163982 transitions. [2021-06-05 04:03:22,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:03:22,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:22,029 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:22,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1038 [2021-06-05 04:03:22,230 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:22,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:22,230 INFO L82 PathProgramCache]: Analyzing trace with hash -728930421, now seen corresponding path program 594 times [2021-06-05 04:03:22,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:22,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621387291] [2021-06-05 04:03:22,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:22,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:22,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621387291] [2021-06-05 04:03:22,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621387291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:22,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508247572] [2021-06-05 04:03:22,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:22,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:03:22,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:22,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:03:22,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:22,440 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:22,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508247572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:22,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:22,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 25 [2021-06-05 04:03:22,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996884285] [2021-06-05 04:03:22,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:03:22,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:22,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:03:22,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:03:22,441 INFO L87 Difference]: Start difference. First operand 51005 states and 163982 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:23,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:23,898 INFO L93 Difference]: Finished difference Result 58128 states and 183935 transitions. [2021-06-05 04:03:23,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 04:03:23,898 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:03:23,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:24,003 INFO L225 Difference]: With dead ends: 58128 [2021-06-05 04:03:24,003 INFO L226 Difference]: Without dead ends: 58124 [2021-06-05 04:03:24,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2371 ImplicationChecksByTransitivity, 890.9ms TimeCoverageRelationStatistics Valid=2966, Invalid=5964, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 04:03:24,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58124 states. [2021-06-05 04:03:24,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58124 to 51428. [2021-06-05 04:03:24,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51428 states, 51427 states have (on average 3.215256577284306) internal successors, (165351), 51427 states have internal predecessors, (165351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:25,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51428 states to 51428 states and 165351 transitions. [2021-06-05 04:03:25,088 INFO L78 Accepts]: Start accepts. Automaton has 51428 states and 165351 transitions. Word has length 26 [2021-06-05 04:03:25,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:25,088 INFO L482 AbstractCegarLoop]: Abstraction has 51428 states and 165351 transitions. [2021-06-05 04:03:25,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:25,088 INFO L276 IsEmpty]: Start isEmpty. Operand 51428 states and 165351 transitions. [2021-06-05 04:03:25,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:03:25,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:25,154 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:25,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1039,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:25,354 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:25,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:25,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1804798347, now seen corresponding path program 595 times [2021-06-05 04:03:25,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:25,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12186306] [2021-06-05 04:03:25,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:25,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:25,408 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:25,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:25,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12186306] [2021-06-05 04:03:25,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12186306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:25,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970958161] [2021-06-05 04:03:25,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:25,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:03:25,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:25,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970958161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:25,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:25,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 25 [2021-06-05 04:03:25,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459829040] [2021-06-05 04:03:25,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:03:25,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:25,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:03:25,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:03:25,584 INFO L87 Difference]: Start difference. First operand 51428 states and 165351 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:26,623 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2021-06-05 04:03:27,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:27,050 INFO L93 Difference]: Finished difference Result 58986 states and 186645 transitions. [2021-06-05 04:03:27,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 04:03:27,051 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:03:27,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:27,159 INFO L225 Difference]: With dead ends: 58986 [2021-06-05 04:03:27,159 INFO L226 Difference]: Without dead ends: 58986 [2021-06-05 04:03:27,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2386 ImplicationChecksByTransitivity, 1050.3ms TimeCoverageRelationStatistics Valid=3114, Invalid=5816, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 04:03:27,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58986 states. [2021-06-05 04:03:28,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58986 to 51291. [2021-06-05 04:03:28,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51291 states, 51290 states have (on average 3.220627802690583) internal successors, (165186), 51290 states have internal predecessors, (165186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:28,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51291 states to 51291 states and 165186 transitions. [2021-06-05 04:03:28,409 INFO L78 Accepts]: Start accepts. Automaton has 51291 states and 165186 transitions. Word has length 26 [2021-06-05 04:03:28,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:28,409 INFO L482 AbstractCegarLoop]: Abstraction has 51291 states and 165186 transitions. [2021-06-05 04:03:28,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:28,409 INFO L276 IsEmpty]: Start isEmpty. Operand 51291 states and 165186 transitions. [2021-06-05 04:03:28,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:03:28,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:28,471 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:28,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1040,599 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:28,672 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:28,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:28,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1918714143, now seen corresponding path program 596 times [2021-06-05 04:03:28,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:28,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654362647] [2021-06-05 04:03:28,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:28,727 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:28,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:28,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654362647] [2021-06-05 04:03:28,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654362647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:28,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747962621] [2021-06-05 04:03:28,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:28,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:28,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:28,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:03:28,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:28,876 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:28,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747962621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:28,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:28,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 25 [2021-06-05 04:03:28,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720871614] [2021-06-05 04:03:28,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:03:28,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:28,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:03:28,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:03:28,877 INFO L87 Difference]: Start difference. First operand 51291 states and 165186 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:30,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:30,474 INFO L93 Difference]: Finished difference Result 56236 states and 178388 transitions. [2021-06-05 04:03:30,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-05 04:03:30,475 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:03:30,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:30,574 INFO L225 Difference]: With dead ends: 56236 [2021-06-05 04:03:30,574 INFO L226 Difference]: Without dead ends: 56224 [2021-06-05 04:03:30,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 1280.1ms TimeCoverageRelationStatistics Valid=4352, Invalid=9928, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 04:03:30,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56224 states. [2021-06-05 04:03:31,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56224 to 50695. [2021-06-05 04:03:31,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50695 states, 50694 states have (on average 3.218467668757644) internal successors, (163157), 50694 states have internal predecessors, (163157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:31,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50695 states to 50695 states and 163157 transitions. [2021-06-05 04:03:31,548 INFO L78 Accepts]: Start accepts. Automaton has 50695 states and 163157 transitions. Word has length 26 [2021-06-05 04:03:31,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:31,548 INFO L482 AbstractCegarLoop]: Abstraction has 50695 states and 163157 transitions. [2021-06-05 04:03:31,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:31,548 INFO L276 IsEmpty]: Start isEmpty. Operand 50695 states and 163157 transitions. [2021-06-05 04:03:31,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:03:31,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:31,605 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:31,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1041,600 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:31,805 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:31,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:31,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1383484341, now seen corresponding path program 597 times [2021-06-05 04:03:31,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:31,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941217040] [2021-06-05 04:03:31,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:31,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:31,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:31,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941217040] [2021-06-05 04:03:31,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941217040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:31,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146970035] [2021-06-05 04:03:31,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:31,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:03:31,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:31,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:03:31,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 24 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:32,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146970035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:32,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:32,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 26 [2021-06-05 04:03:32,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051091438] [2021-06-05 04:03:32,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:03:32,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:32,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:03:32,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:03:32,015 INFO L87 Difference]: Start difference. First operand 50695 states and 163157 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:33,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:33,642 INFO L93 Difference]: Finished difference Result 55825 states and 177005 transitions. [2021-06-05 04:03:33,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 04:03:33,643 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:03:33,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:33,743 INFO L225 Difference]: With dead ends: 55825 [2021-06-05 04:03:33,744 INFO L226 Difference]: Without dead ends: 55807 [2021-06-05 04:03:33,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4107 ImplicationChecksByTransitivity, 1275.4ms TimeCoverageRelationStatistics Valid=4043, Invalid=9529, Unknown=0, NotChecked=0, Total=13572 [2021-06-05 04:03:33,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55807 states. [2021-06-05 04:03:34,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55807 to 50449. [2021-06-05 04:03:34,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50449 states, 50448 states have (on average 3.219096891849033) internal successors, (162397), 50448 states have internal predecessors, (162397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:34,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50449 states to 50449 states and 162397 transitions. [2021-06-05 04:03:34,731 INFO L78 Accepts]: Start accepts. Automaton has 50449 states and 162397 transitions. Word has length 26 [2021-06-05 04:03:34,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:34,731 INFO L482 AbstractCegarLoop]: Abstraction has 50449 states and 162397 transitions. [2021-06-05 04:03:34,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:34,731 INFO L276 IsEmpty]: Start isEmpty. Operand 50449 states and 162397 transitions. [2021-06-05 04:03:34,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:03:34,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:34,790 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:34,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,601 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:34,990 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:34,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:34,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1971229663, now seen corresponding path program 598 times [2021-06-05 04:03:34,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:34,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941535657] [2021-06-05 04:03:34,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:35,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:35,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941535657] [2021-06-05 04:03:35,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941535657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:35,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647174729] [2021-06-05 04:03:35,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:35,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:35,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:35,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:03:35,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:35,215 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:35,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647174729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:35,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:35,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 27 [2021-06-05 04:03:35,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473417079] [2021-06-05 04:03:35,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 04:03:35,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:35,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 04:03:35,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:03:35,216 INFO L87 Difference]: Start difference. First operand 50449 states and 162397 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:36,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:36,793 INFO L93 Difference]: Finished difference Result 55794 states and 176942 transitions. [2021-06-05 04:03:36,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 04:03:36,794 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:03:36,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:36,915 INFO L225 Difference]: With dead ends: 55794 [2021-06-05 04:03:36,915 INFO L226 Difference]: Without dead ends: 55758 [2021-06-05 04:03:36,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4084 ImplicationChecksByTransitivity, 1260.9ms TimeCoverageRelationStatistics Valid=3869, Invalid=9241, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 04:03:36,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55758 states. [2021-06-05 04:03:37,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55758 to 50138. [2021-06-05 04:03:37,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50138 states, 50137 states have (on average 3.220755130941221) internal successors, (161479), 50137 states have internal predecessors, (161479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:37,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50138 states to 50138 states and 161479 transitions. [2021-06-05 04:03:37,951 INFO L78 Accepts]: Start accepts. Automaton has 50138 states and 161479 transitions. Word has length 26 [2021-06-05 04:03:37,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:37,951 INFO L482 AbstractCegarLoop]: Abstraction has 50138 states and 161479 transitions. [2021-06-05 04:03:37,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:37,951 INFO L276 IsEmpty]: Start isEmpty. Operand 50138 states and 161479 transitions. [2021-06-05 04:03:38,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:03:38,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:38,014 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:38,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1043,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:38,215 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:38,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:38,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1283501835, now seen corresponding path program 599 times [2021-06-05 04:03:38,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:38,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980847815] [2021-06-05 04:03:38,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:38,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:38,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980847815] [2021-06-05 04:03:38,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980847815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:38,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626801679] [2021-06-05 04:03:38,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:38,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:03:38,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:38,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:03:38,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:38,450 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:38,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626801679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:38,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:38,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-06-05 04:03:38,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899272329] [2021-06-05 04:03:38,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 04:03:38,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:38,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 04:03:38,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:03:38,451 INFO L87 Difference]: Start difference. First operand 50138 states and 161479 transitions. Second operand has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:39,488 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 04:03:39,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:39,845 INFO L93 Difference]: Finished difference Result 55028 states and 174803 transitions. [2021-06-05 04:03:39,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 04:03:39,845 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:03:39,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:39,939 INFO L225 Difference]: With dead ends: 55028 [2021-06-05 04:03:39,939 INFO L226 Difference]: Without dead ends: 55004 [2021-06-05 04:03:39,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4062 ImplicationChecksByTransitivity, 1121.9ms TimeCoverageRelationStatistics Valid=3820, Invalid=9062, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 04:03:39,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55004 states. [2021-06-05 04:03:40,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55004 to 50221. [2021-06-05 04:03:40,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50221 states, 50220 states have (on average 3.2211867781760253) internal successors, (161768), 50220 states have internal predecessors, (161768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:40,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50221 states to 50221 states and 161768 transitions. [2021-06-05 04:03:40,913 INFO L78 Accepts]: Start accepts. Automaton has 50221 states and 161768 transitions. Word has length 26 [2021-06-05 04:03:40,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:40,913 INFO L482 AbstractCegarLoop]: Abstraction has 50221 states and 161768 transitions. [2021-06-05 04:03:40,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:40,913 INFO L276 IsEmpty]: Start isEmpty. Operand 50221 states and 161768 transitions. [2021-06-05 04:03:40,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:03:40,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:40,970 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:41,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1044 [2021-06-05 04:03:41,171 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:41,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:41,171 INFO L82 PathProgramCache]: Analyzing trace with hash 2111409623, now seen corresponding path program 600 times [2021-06-05 04:03:41,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:41,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258171795] [2021-06-05 04:03:41,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:41,245 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:41,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:41,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258171795] [2021-06-05 04:03:41,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258171795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:41,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613707632] [2021-06-05 04:03:41,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:41,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:03:41,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:41,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:03:41,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:41,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613707632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:41,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:41,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-06-05 04:03:41,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958142130] [2021-06-05 04:03:41,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 04:03:41,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:41,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 04:03:41,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:03:41,435 INFO L87 Difference]: Start difference. First operand 50221 states and 161768 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:42,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:42,761 INFO L93 Difference]: Finished difference Result 52222 states and 167160 transitions. [2021-06-05 04:03:42,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 04:03:42,761 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:03:42,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:42,840 INFO L225 Difference]: With dead ends: 52222 [2021-06-05 04:03:42,840 INFO L226 Difference]: Without dead ends: 52222 [2021-06-05 04:03:42,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2846 ImplicationChecksByTransitivity, 880.7ms TimeCoverageRelationStatistics Valid=2527, Invalid=6029, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 04:03:42,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52222 states. [2021-06-05 04:03:43,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52222 to 49954. [2021-06-05 04:03:43,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49954 states, 49953 states have (on average 3.2222489139791404) internal successors, (160961), 49953 states have internal predecessors, (160961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:43,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49954 states to 49954 states and 160961 transitions. [2021-06-05 04:03:43,828 INFO L78 Accepts]: Start accepts. Automaton has 49954 states and 160961 transitions. Word has length 26 [2021-06-05 04:03:43,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:43,828 INFO L482 AbstractCegarLoop]: Abstraction has 49954 states and 160961 transitions. [2021-06-05 04:03:43,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:43,828 INFO L276 IsEmpty]: Start isEmpty. Operand 49954 states and 160961 transitions. [2021-06-05 04:03:43,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:03:43,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:43,891 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:44,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1045,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:44,091 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:44,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:44,091 INFO L82 PathProgramCache]: Analyzing trace with hash -827904689, now seen corresponding path program 601 times [2021-06-05 04:03:44,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:44,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218387920] [2021-06-05 04:03:44,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:44,156 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:44,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:44,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218387920] [2021-06-05 04:03:44,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218387920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:44,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996427404] [2021-06-05 04:03:44,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:44,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:03:44,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:44,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996427404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:44,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:44,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-06-05 04:03:44,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30449338] [2021-06-05 04:03:44,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 04:03:44,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:44,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 04:03:44,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:03:44,331 INFO L87 Difference]: Start difference. First operand 49954 states and 160961 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:45,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:45,427 INFO L93 Difference]: Finished difference Result 51699 states and 165336 transitions. [2021-06-05 04:03:45,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 04:03:45,427 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:03:45,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:45,517 INFO L225 Difference]: With dead ends: 51699 [2021-06-05 04:03:45,517 INFO L226 Difference]: Without dead ends: 51681 [2021-06-05 04:03:45,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2167 ImplicationChecksByTransitivity, 795.1ms TimeCoverageRelationStatistics Valid=2039, Invalid=5101, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 04:03:45,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51681 states. [2021-06-05 04:03:46,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51681 to 49643. [2021-06-05 04:03:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49643 states, 49642 states have (on average 3.221888723258531) internal successors, (159941), 49642 states have internal predecessors, (159941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:46,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49643 states to 49643 states and 159941 transitions. [2021-06-05 04:03:46,523 INFO L78 Accepts]: Start accepts. Automaton has 49643 states and 159941 transitions. Word has length 26 [2021-06-05 04:03:46,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:46,523 INFO L482 AbstractCegarLoop]: Abstraction has 49643 states and 159941 transitions. [2021-06-05 04:03:46,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:46,523 INFO L276 IsEmpty]: Start isEmpty. Operand 49643 states and 159941 transitions. [2021-06-05 04:03:46,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:03:46,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:46,788 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:46,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 605 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1046 [2021-06-05 04:03:46,988 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:46,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:46,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1986772695, now seen corresponding path program 602 times [2021-06-05 04:03:46,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:46,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482087281] [2021-06-05 04:03:46,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:47,046 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:47,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:47,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482087281] [2021-06-05 04:03:47,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482087281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:47,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736296966] [2021-06-05 04:03:47,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:47,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:47,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:47,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:03:47,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:47,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736296966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:47,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:47,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-06-05 04:03:47,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780638025] [2021-06-05 04:03:47,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 04:03:47,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:47,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 04:03:47,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:03:47,217 INFO L87 Difference]: Start difference. First operand 49643 states and 159941 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:48,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:48,296 INFO L93 Difference]: Finished difference Result 52977 states and 168722 transitions. [2021-06-05 04:03:48,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 04:03:48,296 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:03:48,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:48,388 INFO L225 Difference]: With dead ends: 52977 [2021-06-05 04:03:48,389 INFO L226 Difference]: Without dead ends: 52963 [2021-06-05 04:03:48,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2098 ImplicationChecksByTransitivity, 768.7ms TimeCoverageRelationStatistics Valid=2097, Invalid=5043, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 04:03:48,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52963 states. [2021-06-05 04:03:49,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52963 to 49369. [2021-06-05 04:03:49,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49369 states, 49368 states have (on average 3.2217023172905526) internal successors, (159049), 49368 states have internal predecessors, (159049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:49,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49369 states to 49369 states and 159049 transitions. [2021-06-05 04:03:49,364 INFO L78 Accepts]: Start accepts. Automaton has 49369 states and 159049 transitions. Word has length 26 [2021-06-05 04:03:49,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:49,364 INFO L482 AbstractCegarLoop]: Abstraction has 49369 states and 159049 transitions. [2021-06-05 04:03:49,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:49,364 INFO L276 IsEmpty]: Start isEmpty. Operand 49369 states and 159049 transitions. [2021-06-05 04:03:49,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:03:49,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:49,421 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:49,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 606 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1047 [2021-06-05 04:03:49,622 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:49,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:49,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1384832079, now seen corresponding path program 603 times [2021-06-05 04:03:49,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:49,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402131040] [2021-06-05 04:03:49,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:49,673 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:49,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:49,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402131040] [2021-06-05 04:03:49,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402131040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:49,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789722903] [2021-06-05 04:03:49,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:49,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:03:49,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:49,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:03:49,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:49,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789722903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:49,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:49,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2021-06-05 04:03:49,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150840076] [2021-06-05 04:03:49,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:03:49,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:49,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:03:49,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:03:49,835 INFO L87 Difference]: Start difference. First operand 49369 states and 159049 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:50,145 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-06-05 04:03:51,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:51,091 INFO L93 Difference]: Finished difference Result 54852 states and 174029 transitions. [2021-06-05 04:03:51,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 04:03:51,091 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:03:51,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:51,188 INFO L225 Difference]: With dead ends: 54852 [2021-06-05 04:03:51,188 INFO L226 Difference]: Without dead ends: 54842 [2021-06-05 04:03:51,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2097 ImplicationChecksByTransitivity, 920.7ms TimeCoverageRelationStatistics Valid=2236, Invalid=5074, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 04:03:51,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54842 states. [2021-06-05 04:03:51,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54842 to 49154. [2021-06-05 04:03:52,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49154 states, 49153 states have (on average 3.2211665615527028) internal successors, (158330), 49153 states have internal predecessors, (158330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:52,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49154 states to 49154 states and 158330 transitions. [2021-06-05 04:03:52,138 INFO L78 Accepts]: Start accepts. Automaton has 49154 states and 158330 transitions. Word has length 26 [2021-06-05 04:03:52,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:52,138 INFO L482 AbstractCegarLoop]: Abstraction has 49154 states and 158330 transitions. [2021-06-05 04:03:52,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:52,138 INFO L276 IsEmpty]: Start isEmpty. Operand 49154 states and 158330 transitions. [2021-06-05 04:03:52,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:03:52,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:52,194 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:52,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1048 [2021-06-05 04:03:52,394 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:52,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:52,395 INFO L82 PathProgramCache]: Analyzing trace with hash 534130647, now seen corresponding path program 604 times [2021-06-05 04:03:52,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:52,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830049854] [2021-06-05 04:03:52,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:52,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:52,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:52,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830049854] [2021-06-05 04:03:52,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830049854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:52,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631563186] [2021-06-05 04:03:52,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:52,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:52,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:52,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:03:52,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:52,596 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:52,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631563186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:52,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:52,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 25 [2021-06-05 04:03:52,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972287918] [2021-06-05 04:03:52,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:03:52,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:52,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:03:52,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:03:52,597 INFO L87 Difference]: Start difference. First operand 49154 states and 158330 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:53,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:53,963 INFO L93 Difference]: Finished difference Result 58722 states and 185803 transitions. [2021-06-05 04:03:53,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 04:03:53,963 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:03:53,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:54,070 INFO L225 Difference]: With dead ends: 58722 [2021-06-05 04:03:54,071 INFO L226 Difference]: Without dead ends: 58716 [2021-06-05 04:03:54,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2087 ImplicationChecksByTransitivity, 969.3ms TimeCoverageRelationStatistics Valid=2457, Invalid=5199, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 04:03:54,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58716 states. [2021-06-05 04:03:54,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58716 to 50390. [2021-06-05 04:03:54,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50390 states, 50389 states have (on average 3.2200480263549585) internal successors, (162255), 50389 states have internal predecessors, (162255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:55,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50390 states to 50390 states and 162255 transitions. [2021-06-05 04:03:55,100 INFO L78 Accepts]: Start accepts. Automaton has 50390 states and 162255 transitions. Word has length 26 [2021-06-05 04:03:55,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:55,100 INFO L482 AbstractCegarLoop]: Abstraction has 50390 states and 162255 transitions. [2021-06-05 04:03:55,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:55,100 INFO L276 IsEmpty]: Start isEmpty. Operand 50390 states and 162255 transitions. [2021-06-05 04:03:55,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:03:55,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:55,158 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:55,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1049,608 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:55,358 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:55,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:55,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1987163313, now seen corresponding path program 605 times [2021-06-05 04:03:55,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:55,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488582154] [2021-06-05 04:03:55,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:55,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:55,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:55,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488582154] [2021-06-05 04:03:55,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488582154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:55,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376660326] [2021-06-05 04:03:55,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:55,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:03:55,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:55,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:03:55,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:55,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376660326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:55,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:55,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 25 [2021-06-05 04:03:55,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368534042] [2021-06-05 04:03:55,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:03:55,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:55,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:03:55,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:03:55,567 INFO L87 Difference]: Start difference. First operand 50390 states and 162255 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:56,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:56,936 INFO L93 Difference]: Finished difference Result 56725 states and 179818 transitions. [2021-06-05 04:03:56,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 04:03:56,936 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:03:56,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:57,036 INFO L225 Difference]: With dead ends: 56725 [2021-06-05 04:03:57,036 INFO L226 Difference]: Without dead ends: 56721 [2021-06-05 04:03:57,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2166 ImplicationChecksByTransitivity, 1029.1ms TimeCoverageRelationStatistics Valid=2734, Invalid=5456, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 04:03:57,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56721 states. [2021-06-05 04:03:57,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56721 to 50555. [2021-06-05 04:03:57,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50555 states, 50554 states have (on average 3.220081497013095) internal successors, (162788), 50554 states have internal predecessors, (162788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50555 states to 50555 states and 162788 transitions. [2021-06-05 04:03:58,071 INFO L78 Accepts]: Start accepts. Automaton has 50555 states and 162788 transitions. Word has length 26 [2021-06-05 04:03:58,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:58,071 INFO L482 AbstractCegarLoop]: Abstraction has 50555 states and 162788 transitions. [2021-06-05 04:03:58,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:58,071 INFO L276 IsEmpty]: Start isEmpty. Operand 50555 states and 162788 transitions. [2021-06-05 04:03:58,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:03:58,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:58,133 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:58,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1050 [2021-06-05 04:03:58,333 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:58,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:58,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1395187927, now seen corresponding path program 606 times [2021-06-05 04:03:58,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:58,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644610848] [2021-06-05 04:03:58,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:58,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:58,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644610848] [2021-06-05 04:03:58,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644610848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:58,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949470488] [2021-06-05 04:03:58,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:58,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:03:58,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:58,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:03:58,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:58,548 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:58,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949470488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:58,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:58,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 25 [2021-06-05 04:03:58,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116648264] [2021-06-05 04:03:58,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:03:58,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:58,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:03:58,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:03:58,549 INFO L87 Difference]: Start difference. First operand 50555 states and 162788 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:59,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:59,934 INFO L93 Difference]: Finished difference Result 58603 states and 185191 transitions. [2021-06-05 04:03:59,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 04:03:59,935 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:03:59,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:00,027 INFO L225 Difference]: With dead ends: 58603 [2021-06-05 04:04:00,028 INFO L226 Difference]: Without dead ends: 58603 [2021-06-05 04:04:00,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2324 ImplicationChecksByTransitivity, 841.2ms TimeCoverageRelationStatistics Valid=2988, Invalid=5568, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 04:04:00,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58603 states. [2021-06-05 04:04:00,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58603 to 49525. [2021-06-05 04:04:00,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49525 states, 49524 states have (on average 3.2252847104434212) internal successors, (159729), 49524 states have internal predecessors, (159729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:00,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49525 states to 49525 states and 159729 transitions. [2021-06-05 04:04:00,999 INFO L78 Accepts]: Start accepts. Automaton has 49525 states and 159729 transitions. Word has length 26 [2021-06-05 04:04:00,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:00,999 INFO L482 AbstractCegarLoop]: Abstraction has 49525 states and 159729 transitions. [2021-06-05 04:04:00,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:00,999 INFO L276 IsEmpty]: Start isEmpty. Operand 49525 states and 159729 transitions. [2021-06-05 04:04:01,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:04:01,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:01,055 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:01,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1051,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:01,256 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:01,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:01,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1966642733, now seen corresponding path program 607 times [2021-06-05 04:04:01,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:01,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051196204] [2021-06-05 04:04:01,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:01,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:01,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051196204] [2021-06-05 04:04:01,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051196204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:01,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889456959] [2021-06-05 04:04:01,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:01,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:04:01,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 24 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:01,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889456959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:01,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:01,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 25 [2021-06-05 04:04:01,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685322567] [2021-06-05 04:04:01,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:04:01,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:01,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:04:01,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:04:01,459 INFO L87 Difference]: Start difference. First operand 49525 states and 159729 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:03,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:03,150 INFO L93 Difference]: Finished difference Result 55764 states and 176549 transitions. [2021-06-05 04:04:03,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 04:04:03,150 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:04:03,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:03,257 INFO L225 Difference]: With dead ends: 55764 [2021-06-05 04:04:03,258 INFO L226 Difference]: Without dead ends: 55755 [2021-06-05 04:04:03,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5175 ImplicationChecksByTransitivity, 1197.3ms TimeCoverageRelationStatistics Valid=4713, Invalid=11289, Unknown=0, NotChecked=0, Total=16002 [2021-06-05 04:04:03,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55755 states. [2021-06-05 04:04:04,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55755 to 49339. [2021-06-05 04:04:04,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49339 states, 49338 states have (on average 3.224167984109611) internal successors, (159074), 49338 states have internal predecessors, (159074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:04,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49339 states to 49339 states and 159074 transitions. [2021-06-05 04:04:04,270 INFO L78 Accepts]: Start accepts. Automaton has 49339 states and 159074 transitions. Word has length 26 [2021-06-05 04:04:04,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:04,270 INFO L482 AbstractCegarLoop]: Abstraction has 49339 states and 159074 transitions. [2021-06-05 04:04:04,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:04,270 INFO L276 IsEmpty]: Start isEmpty. Operand 49339 states and 159074 transitions. [2021-06-05 04:04:04,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:04:04,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:04,327 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:04,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1052,611 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:04,527 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:04,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:04,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1793094761, now seen corresponding path program 608 times [2021-06-05 04:04:04,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:04,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008532745] [2021-06-05 04:04:04,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:04,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:04,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008532745] [2021-06-05 04:04:04,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008532745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:04,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316927583] [2021-06-05 04:04:04,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:04,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:04,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:04,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:04:04,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:04,739 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:04,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316927583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:04,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:04,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2021-06-05 04:04:04,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957242851] [2021-06-05 04:04:04,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:04:04,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:04,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:04:04,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:04:04,740 INFO L87 Difference]: Start difference. First operand 49339 states and 159074 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:06,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:06,425 INFO L93 Difference]: Finished difference Result 55693 states and 176306 transitions. [2021-06-05 04:04:06,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-05 04:04:06,425 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:04:06,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:06,542 INFO L225 Difference]: With dead ends: 55693 [2021-06-05 04:04:06,542 INFO L226 Difference]: Without dead ends: 55678 [2021-06-05 04:04:06,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4723 ImplicationChecksByTransitivity, 1158.8ms TimeCoverageRelationStatistics Valid=4224, Invalid=10538, Unknown=0, NotChecked=0, Total=14762 [2021-06-05 04:04:06,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55678 states. [2021-06-05 04:04:07,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55678 to 49042. [2021-06-05 04:04:07,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49042 states, 49041 states have (on average 3.223792337024123) internal successors, (158098), 49041 states have internal predecessors, (158098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:07,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49042 states to 49042 states and 158098 transitions. [2021-06-05 04:04:07,512 INFO L78 Accepts]: Start accepts. Automaton has 49042 states and 158098 transitions. Word has length 26 [2021-06-05 04:04:07,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:07,512 INFO L482 AbstractCegarLoop]: Abstraction has 49042 states and 158098 transitions. [2021-06-05 04:04:07,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:07,513 INFO L276 IsEmpty]: Start isEmpty. Operand 49042 states and 158098 transitions. [2021-06-05 04:04:07,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:04:07,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:07,570 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:07,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1053 [2021-06-05 04:04:07,770 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:07,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:07,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1914127213, now seen corresponding path program 609 times [2021-06-05 04:04:07,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:07,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238006301] [2021-06-05 04:04:07,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:07,830 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:07,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:07,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238006301] [2021-06-05 04:04:07,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238006301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:07,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539153721] [2021-06-05 04:04:07,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:07,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:04:07,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:07,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:04:07,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:07,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539153721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:07,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:07,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-06-05 04:04:07,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794830217] [2021-06-05 04:04:07,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 04:04:07,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:07,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 04:04:07,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:04:07,999 INFO L87 Difference]: Start difference. First operand 49042 states and 158098 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:09,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:09,566 INFO L93 Difference]: Finished difference Result 55641 states and 176087 transitions. [2021-06-05 04:04:09,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 04:04:09,567 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:04:09,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:09,654 INFO L225 Difference]: With dead ends: 55641 [2021-06-05 04:04:09,654 INFO L226 Difference]: Without dead ends: 55620 [2021-06-05 04:04:09,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4436 ImplicationChecksByTransitivity, 1112.5ms TimeCoverageRelationStatistics Valid=3872, Invalid=9934, Unknown=0, NotChecked=0, Total=13806 [2021-06-05 04:04:09,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55620 states. [2021-06-05 04:04:10,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55620 to 49000. [2021-06-05 04:04:10,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49000 states, 48999 states have (on average 3.223269862650258) internal successors, (157937), 48999 states have internal predecessors, (157937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:10,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49000 states to 49000 states and 157937 transitions. [2021-06-05 04:04:10,594 INFO L78 Accepts]: Start accepts. Automaton has 49000 states and 157937 transitions. Word has length 26 [2021-06-05 04:04:10,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:10,594 INFO L482 AbstractCegarLoop]: Abstraction has 49000 states and 157937 transitions. [2021-06-05 04:04:10,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:10,594 INFO L276 IsEmpty]: Start isEmpty. Operand 49000 states and 157937 transitions. [2021-06-05 04:04:10,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:04:10,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:10,657 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:10,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1054,613 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:10,858 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:10,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:10,858 INFO L82 PathProgramCache]: Analyzing trace with hash 873891415, now seen corresponding path program 610 times [2021-06-05 04:04:10,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:10,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896841793] [2021-06-05 04:04:10,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:10,924 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:10,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:10,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896841793] [2021-06-05 04:04:10,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896841793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:10,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390253129] [2021-06-05 04:04:10,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:10,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:10,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:10,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:04:10,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:11,090 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 24 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:11,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390253129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:11,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:11,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-06-05 04:04:11,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998053919] [2021-06-05 04:04:11,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 04:04:11,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:11,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 04:04:11,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:04:11,091 INFO L87 Difference]: Start difference. First operand 49000 states and 157937 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:12,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:12,475 INFO L93 Difference]: Finished difference Result 55859 states and 176720 transitions. [2021-06-05 04:04:12,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-05 04:04:12,476 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:04:12,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:12,768 INFO L225 Difference]: With dead ends: 55859 [2021-06-05 04:04:12,768 INFO L226 Difference]: Without dead ends: 55823 [2021-06-05 04:04:12,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4273 ImplicationChecksByTransitivity, 1089.7ms TimeCoverageRelationStatistics Valid=3652, Invalid=9458, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 04:04:12,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55823 states. [2021-06-05 04:04:13,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55823 to 48991. [2021-06-05 04:04:13,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48991 states, 48990 states have (on average 3.223800775668504) internal successors, (157934), 48990 states have internal predecessors, (157934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:13,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48991 states to 48991 states and 157934 transitions. [2021-06-05 04:04:13,740 INFO L78 Accepts]: Start accepts. Automaton has 48991 states and 157934 transitions. Word has length 26 [2021-06-05 04:04:13,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:13,740 INFO L482 AbstractCegarLoop]: Abstraction has 48991 states and 157934 transitions. [2021-06-05 04:04:13,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:13,740 INFO L276 IsEmpty]: Start isEmpty. Operand 48991 states and 157934 transitions. [2021-06-05 04:04:13,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:04:13,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:13,794 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:13,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 614 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1055 [2021-06-05 04:04:13,994 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:13,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:13,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1308647251, now seen corresponding path program 611 times [2021-06-05 04:04:13,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:13,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361037649] [2021-06-05 04:04:13,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:13,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:14,068 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:14,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:14,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361037649] [2021-06-05 04:04:14,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361037649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:14,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608939664] [2021-06-05 04:04:14,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:14,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:04:14,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:14,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:04:14,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:14,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608939664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:14,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:14,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-06-05 04:04:14,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766449456] [2021-06-05 04:04:14,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 04:04:14,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:14,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 04:04:14,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:04:14,240 INFO L87 Difference]: Start difference. First operand 48991 states and 157934 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:15,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:15,444 INFO L93 Difference]: Finished difference Result 55221 states and 174988 transitions. [2021-06-05 04:04:15,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 04:04:15,444 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:04:15,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:15,547 INFO L225 Difference]: With dead ends: 55221 [2021-06-05 04:04:15,548 INFO L226 Difference]: Without dead ends: 55191 [2021-06-05 04:04:15,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4097 ImplicationChecksByTransitivity, 937.0ms TimeCoverageRelationStatistics Valid=3559, Invalid=9097, Unknown=0, NotChecked=0, Total=12656 [2021-06-05 04:04:15,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55191 states. [2021-06-05 04:04:16,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55191 to 49035. [2021-06-05 04:04:16,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49035 states, 49034 states have (on average 3.2239874372884123) internal successors, (158085), 49034 states have internal predecessors, (158085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:16,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49035 states to 49035 states and 158085 transitions. [2021-06-05 04:04:16,489 INFO L78 Accepts]: Start accepts. Automaton has 49035 states and 158085 transitions. Word has length 26 [2021-06-05 04:04:16,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:16,489 INFO L482 AbstractCegarLoop]: Abstraction has 49035 states and 158085 transitions. [2021-06-05 04:04:16,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:16,489 INFO L276 IsEmpty]: Start isEmpty. Operand 49035 states and 158085 transitions. [2021-06-05 04:04:16,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:04:16,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:16,546 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:16,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1056 [2021-06-05 04:04:16,747 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:16,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:16,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1609641205, now seen corresponding path program 612 times [2021-06-05 04:04:16,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:16,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72186264] [2021-06-05 04:04:16,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:16,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:16,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72186264] [2021-06-05 04:04:16,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72186264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:16,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899972400] [2021-06-05 04:04:16,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:16,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:04:16,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:16,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:04:16,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:17,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899972400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:17,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:17,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-06-05 04:04:17,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816940154] [2021-06-05 04:04:17,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 04:04:17,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:17,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 04:04:17,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:04:17,156 INFO L87 Difference]: Start difference. First operand 49035 states and 158085 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:18,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:18,348 INFO L93 Difference]: Finished difference Result 50135 states and 160799 transitions. [2021-06-05 04:04:18,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 04:04:18,349 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:04:18,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:18,445 INFO L225 Difference]: With dead ends: 50135 [2021-06-05 04:04:18,445 INFO L226 Difference]: Without dead ends: 50135 [2021-06-05 04:04:18,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3151 ImplicationChecksByTransitivity, 941.6ms TimeCoverageRelationStatistics Valid=2688, Invalid=6624, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 04:04:18,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50135 states. [2021-06-05 04:04:19,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50135 to 48740. [2021-06-05 04:04:19,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48740 states, 48739 states have (on average 3.2238043455959295) internal successors, (157125), 48739 states have internal predecessors, (157125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:19,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48740 states to 48740 states and 157125 transitions. [2021-06-05 04:04:19,488 INFO L78 Accepts]: Start accepts. Automaton has 48740 states and 157125 transitions. Word has length 26 [2021-06-05 04:04:19,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:19,488 INFO L482 AbstractCegarLoop]: Abstraction has 48740 states and 157125 transitions. [2021-06-05 04:04:19,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:19,489 INFO L276 IsEmpty]: Start isEmpty. Operand 48740 states and 157125 transitions. [2021-06-05 04:04:19,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:04:19,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:19,548 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:19,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 616 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1057 [2021-06-05 04:04:19,749 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:19,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:19,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1996578805, now seen corresponding path program 613 times [2021-06-05 04:04:19,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:19,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735956841] [2021-06-05 04:04:19,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:19,815 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:19,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:19,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735956841] [2021-06-05 04:04:19,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735956841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:19,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268838908] [2021-06-05 04:04:19,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:19,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:04:19,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:19,999 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:20,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268838908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:20,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:20,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-06-05 04:04:20,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38342025] [2021-06-05 04:04:20,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 04:04:20,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:20,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 04:04:20,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:04:20,000 INFO L87 Difference]: Start difference. First operand 48740 states and 157125 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:20,496 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 04:04:21,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:21,233 INFO L93 Difference]: Finished difference Result 50504 states and 161476 transitions. [2021-06-05 04:04:21,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 04:04:21,234 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:04:21,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:21,324 INFO L225 Difference]: With dead ends: 50504 [2021-06-05 04:04:21,325 INFO L226 Difference]: Without dead ends: 50486 [2021-06-05 04:04:21,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2374 ImplicationChecksByTransitivity, 973.0ms TimeCoverageRelationStatistics Valid=2179, Invalid=5653, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 04:04:21,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50486 states. [2021-06-05 04:04:22,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50486 to 48154. [2021-06-05 04:04:22,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48154 states, 48153 states have (on average 3.2245135297904595) internal successors, (155270), 48153 states have internal predecessors, (155270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:22,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48154 states to 48154 states and 155270 transitions. [2021-06-05 04:04:22,237 INFO L78 Accepts]: Start accepts. Automaton has 48154 states and 155270 transitions. Word has length 26 [2021-06-05 04:04:22,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:22,237 INFO L482 AbstractCegarLoop]: Abstraction has 48154 states and 155270 transitions. [2021-06-05 04:04:22,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:22,237 INFO L276 IsEmpty]: Start isEmpty. Operand 48154 states and 155270 transitions. [2021-06-05 04:04:22,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:04:22,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:22,295 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:22,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1058 [2021-06-05 04:04:22,496 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:22,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:22,496 INFO L82 PathProgramCache]: Analyzing trace with hash 207696651, now seen corresponding path program 614 times [2021-06-05 04:04:22,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:22,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752527195] [2021-06-05 04:04:22,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:22,560 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:22,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:22,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752527195] [2021-06-05 04:04:22,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752527195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:22,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846193118] [2021-06-05 04:04:22,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:22,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:22,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:22,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:04:22,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:22,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846193118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:22,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:22,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-06-05 04:04:22,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926254953] [2021-06-05 04:04:22,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 04:04:22,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:22,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 04:04:22,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:04:22,741 INFO L87 Difference]: Start difference. First operand 48154 states and 155270 transitions. Second operand has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:24,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:24,060 INFO L93 Difference]: Finished difference Result 51269 states and 163226 transitions. [2021-06-05 04:04:24,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 04:04:24,061 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:04:24,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:24,142 INFO L225 Difference]: With dead ends: 51269 [2021-06-05 04:04:24,142 INFO L226 Difference]: Without dead ends: 51255 [2021-06-05 04:04:24,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2255 ImplicationChecksByTransitivity, 1036.9ms TimeCoverageRelationStatistics Valid=2127, Invalid=5355, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 04:04:24,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51255 states. [2021-06-05 04:04:24,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51255 to 47385. [2021-06-05 04:04:24,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47385 states, 47384 states have (on average 3.225371433395239) internal successors, (152831), 47384 states have internal predecessors, (152831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:25,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47385 states to 47385 states and 152831 transitions. [2021-06-05 04:04:25,142 INFO L78 Accepts]: Start accepts. Automaton has 47385 states and 152831 transitions. Word has length 26 [2021-06-05 04:04:25,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:25,142 INFO L482 AbstractCegarLoop]: Abstraction has 47385 states and 152831 transitions. [2021-06-05 04:04:25,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:25,142 INFO L276 IsEmpty]: Start isEmpty. Operand 47385 states and 152831 transitions. [2021-06-05 04:04:25,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:04:25,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:25,201 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:25,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1059,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:25,401 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:25,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:25,402 INFO L82 PathProgramCache]: Analyzing trace with hash 417349643, now seen corresponding path program 615 times [2021-06-05 04:04:25,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:25,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120171939] [2021-06-05 04:04:25,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:25,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:25,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120171939] [2021-06-05 04:04:25,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120171939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:25,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286278658] [2021-06-05 04:04:25,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:25,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 04:04:25,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:25,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:04:25,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:25,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286278658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:25,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:25,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-06-05 04:04:25,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999992493] [2021-06-05 04:04:25,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 04:04:25,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:25,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 04:04:25,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:04:25,630 INFO L87 Difference]: Start difference. First operand 47385 states and 152831 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:26,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:26,771 INFO L93 Difference]: Finished difference Result 52305 states and 165969 transitions. [2021-06-05 04:04:26,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 04:04:26,771 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:04:26,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:26,864 INFO L225 Difference]: With dead ends: 52305 [2021-06-05 04:04:26,864 INFO L226 Difference]: Without dead ends: 52295 [2021-06-05 04:04:26,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 813.3ms TimeCoverageRelationStatistics Valid=2252, Invalid=5404, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 04:04:26,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52295 states. [2021-06-05 04:04:27,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52295 to 46559. [2021-06-05 04:04:27,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46559 states, 46558 states have (on average 3.2249667081919324) internal successors, (150148), 46558 states have internal predecessors, (150148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:27,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46559 states to 46559 states and 150148 transitions. [2021-06-05 04:04:27,813 INFO L78 Accepts]: Start accepts. Automaton has 46559 states and 150148 transitions. Word has length 26 [2021-06-05 04:04:27,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:27,813 INFO L482 AbstractCegarLoop]: Abstraction has 46559 states and 150148 transitions. [2021-06-05 04:04:27,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:27,813 INFO L276 IsEmpty]: Start isEmpty. Operand 46559 states and 150148 transitions. [2021-06-05 04:04:27,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:04:27,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:27,869 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:28,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1060 [2021-06-05 04:04:28,069 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:28,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:28,069 INFO L82 PathProgramCache]: Analyzing trace with hash 701207307, now seen corresponding path program 616 times [2021-06-05 04:04:28,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:28,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224580591] [2021-06-05 04:04:28,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:28,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:28,116 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:28,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:28,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224580591] [2021-06-05 04:04:28,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224580591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:28,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766596547] [2021-06-05 04:04:28,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:28,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:28,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:28,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:04:28,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:28,282 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:28,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766596547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:28,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:28,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 26 [2021-06-05 04:04:28,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522562687] [2021-06-05 04:04:28,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:04:28,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:28,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:04:28,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:04:28,283 INFO L87 Difference]: Start difference. First operand 46559 states and 150148 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:29,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:29,643 INFO L93 Difference]: Finished difference Result 55404 states and 175292 transitions. [2021-06-05 04:04:29,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 04:04:29,643 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:04:29,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:29,746 INFO L225 Difference]: With dead ends: 55404 [2021-06-05 04:04:29,746 INFO L226 Difference]: Without dead ends: 55398 [2021-06-05 04:04:29,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2238 ImplicationChecksByTransitivity, 847.8ms TimeCoverageRelationStatistics Valid=2479, Invalid=5531, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 04:04:29,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55398 states. [2021-06-05 04:04:30,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55398 to 46786. [2021-06-05 04:04:30,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46786 states, 46785 states have (on average 3.225029389761676) internal successors, (150883), 46785 states have internal predecessors, (150883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46786 states to 46786 states and 150883 transitions. [2021-06-05 04:04:30,640 INFO L78 Accepts]: Start accepts. Automaton has 46786 states and 150883 transitions. Word has length 26 [2021-06-05 04:04:30,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:30,640 INFO L482 AbstractCegarLoop]: Abstraction has 46786 states and 150883 transitions. [2021-06-05 04:04:30,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:30,640 INFO L276 IsEmpty]: Start isEmpty. Operand 46786 states and 150883 transitions. [2021-06-05 04:04:30,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:04:30,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:30,698 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:30,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1061,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:30,898 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:30,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:30,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1957289995, now seen corresponding path program 617 times [2021-06-05 04:04:30,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:30,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439730116] [2021-06-05 04:04:30,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:30,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:30,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439730116] [2021-06-05 04:04:30,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439730116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:30,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252572398] [2021-06-05 04:04:30,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:30,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:04:30,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:30,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:04:30,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:31,102 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:31,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252572398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:31,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:31,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 25 [2021-06-05 04:04:31,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531670524] [2021-06-05 04:04:31,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:04:31,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:31,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:04:31,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:04:31,103 INFO L87 Difference]: Start difference. First operand 46786 states and 150883 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:32,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:32,448 INFO L93 Difference]: Finished difference Result 61492 states and 193983 transitions. [2021-06-05 04:04:32,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 04:04:32,449 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:04:32,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:32,559 INFO L225 Difference]: With dead ends: 61492 [2021-06-05 04:04:32,559 INFO L226 Difference]: Without dead ends: 61490 [2021-06-05 04:04:32,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2326 ImplicationChecksByTransitivity, 863.9ms TimeCoverageRelationStatistics Valid=2749, Invalid=5623, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 04:04:32,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61490 states. [2021-06-05 04:04:33,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61490 to 51712. [2021-06-05 04:04:33,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51712 states, 51711 states have (on average 3.216665699754404) internal successors, (166337), 51711 states have internal predecessors, (166337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:33,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51712 states to 51712 states and 166337 transitions. [2021-06-05 04:04:33,653 INFO L78 Accepts]: Start accepts. Automaton has 51712 states and 166337 transitions. Word has length 26 [2021-06-05 04:04:33,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:33,653 INFO L482 AbstractCegarLoop]: Abstraction has 51712 states and 166337 transitions. [2021-06-05 04:04:33,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:33,653 INFO L276 IsEmpty]: Start isEmpty. Operand 51712 states and 166337 transitions. [2021-06-05 04:04:33,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:04:33,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:33,714 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:33,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,621 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:33,929 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:33,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:33,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1582166795, now seen corresponding path program 618 times [2021-06-05 04:04:33,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:33,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434973524] [2021-06-05 04:04:33,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:33,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:33,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434973524] [2021-06-05 04:04:33,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434973524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:33,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020708702] [2021-06-05 04:04:33,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:34,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:04:34,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:34,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:04:34,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:34,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020708702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:34,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:34,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 25 [2021-06-05 04:04:34,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046170240] [2021-06-05 04:04:34,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:04:34,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:34,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:04:34,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:04:34,130 INFO L87 Difference]: Start difference. First operand 51712 states and 166337 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:35,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:35,467 INFO L93 Difference]: Finished difference Result 59948 states and 189010 transitions. [2021-06-05 04:04:35,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 04:04:35,467 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:04:35,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:35,587 INFO L225 Difference]: With dead ends: 59948 [2021-06-05 04:04:35,587 INFO L226 Difference]: Without dead ends: 59948 [2021-06-05 04:04:35,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 985.7ms TimeCoverageRelationStatistics Valid=2839, Invalid=5351, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 04:04:35,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59948 states. [2021-06-05 04:04:36,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59948 to 52817. [2021-06-05 04:04:36,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52817 states, 52816 states have (on average 3.2186837322023627) internal successors, (169998), 52816 states have internal predecessors, (169998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:36,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52817 states to 52817 states and 169998 transitions. [2021-06-05 04:04:36,701 INFO L78 Accepts]: Start accepts. Automaton has 52817 states and 169998 transitions. Word has length 26 [2021-06-05 04:04:36,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:36,701 INFO L482 AbstractCegarLoop]: Abstraction has 52817 states and 169998 transitions. [2021-06-05 04:04:36,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:36,701 INFO L276 IsEmpty]: Start isEmpty. Operand 52817 states and 169998 transitions. [2021-06-05 04:04:36,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:04:36,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:36,766 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:36,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1063,622 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:36,981 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:36,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:36,981 INFO L82 PathProgramCache]: Analyzing trace with hash -2141345695, now seen corresponding path program 619 times [2021-06-05 04:04:36,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:36,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444764998] [2021-06-05 04:04:36,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:37,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:37,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444764998] [2021-06-05 04:04:37,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444764998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:37,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252460633] [2021-06-05 04:04:37,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:37,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:04:37,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:37,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252460633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:37,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:37,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 25 [2021-06-05 04:04:37,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081163271] [2021-06-05 04:04:37,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:04:37,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:37,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:04:37,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:04:37,188 INFO L87 Difference]: Start difference. First operand 52817 states and 169998 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:39,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:39,085 INFO L93 Difference]: Finished difference Result 59665 states and 188362 transitions. [2021-06-05 04:04:39,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-06-05 04:04:39,085 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:04:39,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:39,196 INFO L225 Difference]: With dead ends: 59665 [2021-06-05 04:04:39,196 INFO L226 Difference]: Without dead ends: 59656 [2021-06-05 04:04:39,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6476 ImplicationChecksByTransitivity, 1533.9ms TimeCoverageRelationStatistics Valid=5189, Invalid=13171, Unknown=0, NotChecked=0, Total=18360 [2021-06-05 04:04:39,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59656 states. [2021-06-05 04:04:40,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59656 to 52607. [2021-06-05 04:04:40,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52607 states, 52606 states have (on average 3.2179789377637533) internal successors, (169285), 52606 states have internal predecessors, (169285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:40,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52607 states to 52607 states and 169285 transitions. [2021-06-05 04:04:40,259 INFO L78 Accepts]: Start accepts. Automaton has 52607 states and 169285 transitions. Word has length 26 [2021-06-05 04:04:40,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:40,259 INFO L482 AbstractCegarLoop]: Abstraction has 52607 states and 169285 transitions. [2021-06-05 04:04:40,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:40,259 INFO L276 IsEmpty]: Start isEmpty. Operand 52607 states and 169285 transitions. [2021-06-05 04:04:40,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:04:40,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:40,318 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:40,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1064,623 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:40,518 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:40,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:40,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1606115893, now seen corresponding path program 620 times [2021-06-05 04:04:40,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:40,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472733375] [2021-06-05 04:04:40,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:40,567 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:40,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:40,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472733375] [2021-06-05 04:04:40,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472733375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:40,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458685598] [2021-06-05 04:04:40,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:40,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:40,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:40,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:04:40,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:40,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458685598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:40,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:40,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 26 [2021-06-05 04:04:40,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946110735] [2021-06-05 04:04:40,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:04:40,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:40,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:04:40,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:04:40,731 INFO L87 Difference]: Start difference. First operand 52607 states and 169285 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:41,413 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 9 [2021-06-05 04:04:42,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:42,500 INFO L93 Difference]: Finished difference Result 59565 states and 188121 transitions. [2021-06-05 04:04:42,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 04:04:42,501 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:04:42,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:42,607 INFO L225 Difference]: With dead ends: 59565 [2021-06-05 04:04:42,607 INFO L226 Difference]: Without dead ends: 59553 [2021-06-05 04:04:42,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5711 ImplicationChecksByTransitivity, 1403.3ms TimeCoverageRelationStatistics Valid=4538, Invalid=11974, Unknown=0, NotChecked=0, Total=16512 [2021-06-05 04:04:42,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59553 states. [2021-06-05 04:04:43,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59553 to 52430. [2021-06-05 04:04:43,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52430 states, 52429 states have (on average 3.2178565297831354) internal successors, (168709), 52429 states have internal predecessors, (168709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:43,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52430 states to 52430 states and 168709 transitions. [2021-06-05 04:04:43,664 INFO L78 Accepts]: Start accepts. Automaton has 52430 states and 168709 transitions. Word has length 26 [2021-06-05 04:04:43,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:43,664 INFO L482 AbstractCegarLoop]: Abstraction has 52430 states and 168709 transitions. [2021-06-05 04:04:43,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:43,664 INFO L276 IsEmpty]: Start isEmpty. Operand 52430 states and 168709 transitions. [2021-06-05 04:04:43,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:04:43,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:43,726 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:43,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1065,624 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:43,927 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:43,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:43,927 INFO L82 PathProgramCache]: Analyzing trace with hash 2101106081, now seen corresponding path program 621 times [2021-06-05 04:04:43,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:43,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916278776] [2021-06-05 04:04:43,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:43,988 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:43,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:43,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916278776] [2021-06-05 04:04:43,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916278776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:43,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204324140] [2021-06-05 04:04:43,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:44,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:04:44,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:44,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:04:44,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:44,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204324140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:44,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:44,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-06-05 04:04:44,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845198126] [2021-06-05 04:04:44,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 04:04:44,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:44,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 04:04:44,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:04:44,158 INFO L87 Difference]: Start difference. First operand 52430 states and 168709 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:44,633 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 7 [2021-06-05 04:04:45,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:45,818 INFO L93 Difference]: Finished difference Result 59613 states and 188281 transitions. [2021-06-05 04:04:45,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-06-05 04:04:45,818 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:04:45,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:45,928 INFO L225 Difference]: With dead ends: 59613 [2021-06-05 04:04:45,928 INFO L226 Difference]: Without dead ends: 59595 [2021-06-05 04:04:45,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5110 ImplicationChecksByTransitivity, 1330.0ms TimeCoverageRelationStatistics Valid=4017, Invalid=10989, Unknown=0, NotChecked=0, Total=15006 [2021-06-05 04:04:45,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59595 states. [2021-06-05 04:04:46,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59595 to 52335. [2021-06-05 04:04:46,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52335 states, 52334 states have (on average 3.217812511942523) internal successors, (168401), 52334 states have internal predecessors, (168401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:46,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52335 states to 52335 states and 168401 transitions. [2021-06-05 04:04:46,998 INFO L78 Accepts]: Start accepts. Automaton has 52335 states and 168401 transitions. Word has length 26 [2021-06-05 04:04:46,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:46,998 INFO L482 AbstractCegarLoop]: Abstraction has 52335 states and 168401 transitions. [2021-06-05 04:04:46,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:46,998 INFO L276 IsEmpty]: Start isEmpty. Operand 52335 states and 168401 transitions. [2021-06-05 04:04:47,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:04:47,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:47,059 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:47,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 625 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1066 [2021-06-05 04:04:47,260 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:47,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:47,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1060870283, now seen corresponding path program 622 times [2021-06-05 04:04:47,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:47,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697686289] [2021-06-05 04:04:47,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:47,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:47,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697686289] [2021-06-05 04:04:47,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697686289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:47,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162411483] [2021-06-05 04:04:47,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:47,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:47,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:47,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:04:47,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:47,530 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:47,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162411483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:47,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:47,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-06-05 04:04:47,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763497152] [2021-06-05 04:04:47,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 04:04:47,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:47,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 04:04:47,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:04:47,531 INFO L87 Difference]: Start difference. First operand 52335 states and 168401 transitions. Second operand has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:47,898 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-05 04:04:49,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:49,122 INFO L93 Difference]: Finished difference Result 59909 states and 189167 transitions. [2021-06-05 04:04:49,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 04:04:49,122 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:04:49,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:49,236 INFO L225 Difference]: With dead ends: 59909 [2021-06-05 04:04:49,236 INFO L226 Difference]: Without dead ends: 59885 [2021-06-05 04:04:49,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4656 ImplicationChecksByTransitivity, 1310.4ms TimeCoverageRelationStatistics Valid=3628, Invalid=10178, Unknown=0, NotChecked=0, Total=13806 [2021-06-05 04:04:49,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59885 states. [2021-06-05 04:04:50,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59885 to 52847. [2021-06-05 04:04:50,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52847 states, 52846 states have (on average 3.2172349846724444) internal successors, (170018), 52846 states have internal predecessors, (170018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:50,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52847 states to 52847 states and 170018 transitions. [2021-06-05 04:04:50,270 INFO L78 Accepts]: Start accepts. Automaton has 52847 states and 170018 transitions. Word has length 26 [2021-06-05 04:04:50,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:50,270 INFO L482 AbstractCegarLoop]: Abstraction has 52847 states and 170018 transitions. [2021-06-05 04:04:50,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:50,270 INFO L276 IsEmpty]: Start isEmpty. Operand 52847 states and 170018 transitions. [2021-06-05 04:04:50,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:04:50,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:50,334 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:50,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 626 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1067 [2021-06-05 04:04:50,535 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:50,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:50,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1121668383, now seen corresponding path program 623 times [2021-06-05 04:04:50,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:50,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677706257] [2021-06-05 04:04:50,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:50,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:50,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:50,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677706257] [2021-06-05 04:04:50,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677706257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:50,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888174236] [2021-06-05 04:04:50,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:50,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:04:50,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:50,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:04:50,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:50,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888174236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:50,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:50,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-06-05 04:04:50,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704119146] [2021-06-05 04:04:50,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 04:04:50,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:50,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 04:04:50,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:04:50,805 INFO L87 Difference]: Start difference. First operand 52847 states and 170018 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:52,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:52,346 INFO L93 Difference]: Finished difference Result 60734 states and 191714 transitions. [2021-06-05 04:04:52,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 04:04:52,347 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:04:52,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:52,465 INFO L225 Difference]: With dead ends: 60734 [2021-06-05 04:04:52,465 INFO L226 Difference]: Without dead ends: 60704 [2021-06-05 04:04:52,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4342 ImplicationChecksByTransitivity, 1260.7ms TimeCoverageRelationStatistics Valid=3372, Invalid=9510, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 04:04:52,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60704 states. [2021-06-05 04:04:53,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60704 to 53530. [2021-06-05 04:04:53,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53530 states, 53529 states have (on average 3.216966504137944) internal successors, (172201), 53529 states have internal predecessors, (172201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:53,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53530 states to 53530 states and 172201 transitions. [2021-06-05 04:04:53,574 INFO L78 Accepts]: Start accepts. Automaton has 53530 states and 172201 transitions. Word has length 26 [2021-06-05 04:04:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:53,574 INFO L482 AbstractCegarLoop]: Abstraction has 53530 states and 172201 transitions. [2021-06-05 04:04:53,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:53,574 INFO L276 IsEmpty]: Start isEmpty. Operand 53530 states and 172201 transitions. [2021-06-05 04:04:53,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:04:53,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:53,650 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:53,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 627 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1068 [2021-06-05 04:04:53,850 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:53,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:53,851 INFO L82 PathProgramCache]: Analyzing trace with hash -60890293, now seen corresponding path program 624 times [2021-06-05 04:04:53,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:53,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907469557] [2021-06-05 04:04:53,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:53,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:53,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907469557] [2021-06-05 04:04:53,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907469557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:53,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125216453] [2021-06-05 04:04:53,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:53,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:04:53,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:53,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:04:53,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:54,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125216453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:54,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:54,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-06-05 04:04:54,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598249101] [2021-06-05 04:04:54,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 04:04:54,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:54,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 04:04:54,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:04:54,111 INFO L87 Difference]: Start difference. First operand 53530 states and 172201 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:55,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:55,509 INFO L93 Difference]: Finished difference Result 60371 states and 190864 transitions. [2021-06-05 04:04:55,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 04:04:55,510 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:04:55,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:55,641 INFO L225 Difference]: With dead ends: 60371 [2021-06-05 04:04:55,641 INFO L226 Difference]: Without dead ends: 60335 [2021-06-05 04:04:55,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 1117.5ms TimeCoverageRelationStatistics Valid=3249, Invalid=8961, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 04:04:55,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60335 states. [2021-06-05 04:04:56,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60335 to 53577. [2021-06-05 04:04:56,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53577 states, 53576 states have (on average 3.2172241302075557) internal successors, (172366), 53576 states have internal predecessors, (172366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:56,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53577 states to 53577 states and 172366 transitions. [2021-06-05 04:04:56,826 INFO L78 Accepts]: Start accepts. Automaton has 53577 states and 172366 transitions. Word has length 26 [2021-06-05 04:04:56,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:56,826 INFO L482 AbstractCegarLoop]: Abstraction has 53577 states and 172366 transitions. [2021-06-05 04:04:56,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:56,826 INFO L276 IsEmpty]: Start isEmpty. Operand 53577 states and 172366 transitions. [2021-06-05 04:04:56,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:04:56,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:56,906 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:57,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 628 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1069 [2021-06-05 04:04:57,107 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:57,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:57,107 INFO L82 PathProgramCache]: Analyzing trace with hash -998099881, now seen corresponding path program 625 times [2021-06-05 04:04:57,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:57,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403080157] [2021-06-05 04:04:57,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:57,184 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:57,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:57,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403080157] [2021-06-05 04:04:57,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403080157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:57,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980345877] [2021-06-05 04:04:57,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:57,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:04:57,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:57,391 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:57,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980345877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:57,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:57,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-05 04:04:57,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634546096] [2021-06-05 04:04:57,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 04:04:57,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:57,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 04:04:57,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:04:57,392 INFO L87 Difference]: Start difference. First operand 53577 states and 172366 transitions. Second operand has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:58,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:58,874 INFO L93 Difference]: Finished difference Result 56189 states and 179477 transitions. [2021-06-05 04:04:58,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 04:04:58,874 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:04:58,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:58,994 INFO L225 Difference]: With dead ends: 56189 [2021-06-05 04:04:58,994 INFO L226 Difference]: Without dead ends: 56189 [2021-06-05 04:04:58,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3328 ImplicationChecksByTransitivity, 994.2ms TimeCoverageRelationStatistics Valid=2804, Invalid=7096, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 04:04:59,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56189 states. [2021-06-05 04:04:59,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56189 to 53739. [2021-06-05 04:04:59,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53739 states, 53738 states have (on average 3.2148758792660685) internal successors, (172761), 53738 states have internal predecessors, (172761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:00,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53739 states to 53739 states and 172761 transitions. [2021-06-05 04:05:00,048 INFO L78 Accepts]: Start accepts. Automaton has 53739 states and 172761 transitions. Word has length 26 [2021-06-05 04:05:00,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:00,048 INFO L482 AbstractCegarLoop]: Abstraction has 53739 states and 172761 transitions. [2021-06-05 04:05:00,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:00,048 INFO L276 IsEmpty]: Start isEmpty. Operand 53739 states and 172761 transitions. [2021-06-05 04:05:00,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:05:00,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:00,121 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:00,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1070,629 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:00,322 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:00,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:00,322 INFO L82 PathProgramCache]: Analyzing trace with hash 429229263, now seen corresponding path program 626 times [2021-06-05 04:05:00,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:00,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392086207] [2021-06-05 04:05:00,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:00,387 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:00,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:00,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392086207] [2021-06-05 04:05:00,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392086207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:00,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340217018] [2021-06-05 04:05:00,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:00,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:05:00,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:00,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:05:00,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:00,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340217018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:00,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:00,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-05 04:05:00,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338498800] [2021-06-05 04:05:00,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 04:05:00,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:00,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 04:05:00,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:05:00,596 INFO L87 Difference]: Start difference. First operand 53739 states and 172761 transitions. Second operand has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:02,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:02,066 INFO L93 Difference]: Finished difference Result 57980 states and 184584 transitions. [2021-06-05 04:05:02,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 04:05:02,067 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:05:02,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:02,185 INFO L225 Difference]: With dead ends: 57980 [2021-06-05 04:05:02,185 INFO L226 Difference]: Without dead ends: 57980 [2021-06-05 04:05:02,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2578 ImplicationChecksByTransitivity, 939.2ms TimeCoverageRelationStatistics Valid=2226, Invalid=5964, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 04:05:02,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57980 states. [2021-06-05 04:05:03,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57980 to 54223. [2021-06-05 04:05:03,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54223 states, 54222 states have (on average 3.2140275165062153) internal successors, (174271), 54222 states have internal predecessors, (174271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:03,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54223 states to 54223 states and 174271 transitions. [2021-06-05 04:05:03,274 INFO L78 Accepts]: Start accepts. Automaton has 54223 states and 174271 transitions. Word has length 26 [2021-06-05 04:05:03,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:03,274 INFO L482 AbstractCegarLoop]: Abstraction has 54223 states and 174271 transitions. [2021-06-05 04:05:03,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:03,275 INFO L276 IsEmpty]: Start isEmpty. Operand 54223 states and 174271 transitions. [2021-06-05 04:05:03,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:05:03,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:03,355 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:03,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:03,555 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:03,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:03,556 INFO L82 PathProgramCache]: Analyzing trace with hash 890914135, now seen corresponding path program 627 times [2021-06-05 04:05:03,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:03,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087563568] [2021-06-05 04:05:03,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:03,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:03,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087563568] [2021-06-05 04:05:03,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087563568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:03,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650950941] [2021-06-05 04:05:03,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:03,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:05:03,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:03,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:05:03,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:03,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650950941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:03,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:03,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 29 [2021-06-05 04:05:03,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250457135] [2021-06-05 04:05:03,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 04:05:03,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:03,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 04:05:03,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:05:03,819 INFO L87 Difference]: Start difference. First operand 54223 states and 174271 transitions. Second operand has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:05,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:05,277 INFO L93 Difference]: Finished difference Result 59778 states and 190004 transitions. [2021-06-05 04:05:05,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 04:05:05,278 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:05:05,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:05,398 INFO L225 Difference]: With dead ends: 59778 [2021-06-05 04:05:05,399 INFO L226 Difference]: Without dead ends: 59778 [2021-06-05 04:05:05,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2458 ImplicationChecksByTransitivity, 905.1ms TimeCoverageRelationStatistics Valid=2139, Invalid=5693, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 04:05:05,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59778 states. [2021-06-05 04:05:06,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59778 to 54766. [2021-06-05 04:05:06,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54766 states, 54765 states have (on average 3.214480051127545) internal successors, (176041), 54765 states have internal predecessors, (176041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:06,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54766 states to 54766 states and 176041 transitions. [2021-06-05 04:05:06,591 INFO L78 Accepts]: Start accepts. Automaton has 54766 states and 176041 transitions. Word has length 26 [2021-06-05 04:05:06,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:06,591 INFO L482 AbstractCegarLoop]: Abstraction has 54766 states and 176041 transitions. [2021-06-05 04:05:06,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:06,591 INFO L276 IsEmpty]: Start isEmpty. Operand 54766 states and 176041 transitions. [2021-06-05 04:05:06,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:05:06,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:06,675 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:06,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1072 [2021-06-05 04:05:06,875 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:06,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:06,875 INFO L82 PathProgramCache]: Analyzing trace with hash 490165199, now seen corresponding path program 628 times [2021-06-05 04:05:06,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:06,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997537588] [2021-06-05 04:05:06,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:06,942 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:06,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:06,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997537588] [2021-06-05 04:05:06,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997537588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:06,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182129659] [2021-06-05 04:05:06,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:06,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:05:06,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:06,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:05:06,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:07,143 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:07,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182129659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:07,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:07,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2021-06-05 04:05:07,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602241173] [2021-06-05 04:05:07,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 04:05:07,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:07,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 04:05:07,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:05:07,144 INFO L87 Difference]: Start difference. First operand 54766 states and 176041 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:08,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:08,535 INFO L93 Difference]: Finished difference Result 61776 states and 196083 transitions. [2021-06-05 04:05:08,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 04:05:08,535 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:05:08,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:08,648 INFO L225 Difference]: With dead ends: 61776 [2021-06-05 04:05:08,648 INFO L226 Difference]: Without dead ends: 61776 [2021-06-05 04:05:08,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2536 ImplicationChecksByTransitivity, 890.7ms TimeCoverageRelationStatistics Valid=2245, Invalid=5765, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 04:05:08,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61776 states. [2021-06-05 04:05:09,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61776 to 55382. [2021-06-05 04:05:09,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55382 states, 55381 states have (on average 3.215777974395551) internal successors, (178093), 55381 states have internal predecessors, (178093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:09,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55382 states to 55382 states and 178093 transitions. [2021-06-05 04:05:09,922 INFO L78 Accepts]: Start accepts. Automaton has 55382 states and 178093 transitions. Word has length 26 [2021-06-05 04:05:09,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:09,922 INFO L482 AbstractCegarLoop]: Abstraction has 55382 states and 178093 transitions. [2021-06-05 04:05:09,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:09,922 INFO L276 IsEmpty]: Start isEmpty. Operand 55382 states and 178093 transitions. [2021-06-05 04:05:10,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:05:10,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:10,007 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:10,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1073,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:10,207 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:10,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:10,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1585616471, now seen corresponding path program 629 times [2021-06-05 04:05:10,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:10,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922635087] [2021-06-05 04:05:10,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:10,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:10,253 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:10,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:10,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922635087] [2021-06-05 04:05:10,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922635087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:10,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136973489] [2021-06-05 04:05:10,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:10,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:05:10,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:10,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:05:10,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:10,440 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:10,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136973489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:10,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:10,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 27 [2021-06-05 04:05:10,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751068241] [2021-06-05 04:05:10,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 04:05:10,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:10,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 04:05:10,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:05:10,441 INFO L87 Difference]: Start difference. First operand 55382 states and 178093 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:11,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:11,890 INFO L93 Difference]: Finished difference Result 63917 states and 202424 transitions. [2021-06-05 04:05:11,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 04:05:11,890 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:05:11,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:12,007 INFO L225 Difference]: With dead ends: 63917 [2021-06-05 04:05:12,008 INFO L226 Difference]: Without dead ends: 63917 [2021-06-05 04:05:12,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 1091.9ms TimeCoverageRelationStatistics Valid=2471, Invalid=5901, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 04:05:12,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63917 states. [2021-06-05 04:05:13,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63917 to 55909. [2021-06-05 04:05:13,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55909 states, 55908 states have (on average 3.216838377334192) internal successors, (179847), 55908 states have internal predecessors, (179847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:13,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55909 states to 55909 states and 179847 transitions. [2021-06-05 04:05:13,288 INFO L78 Accepts]: Start accepts. Automaton has 55909 states and 179847 transitions. Word has length 26 [2021-06-05 04:05:13,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:13,288 INFO L482 AbstractCegarLoop]: Abstraction has 55909 states and 179847 transitions. [2021-06-05 04:05:13,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:13,288 INFO L276 IsEmpty]: Start isEmpty. Operand 55909 states and 179847 transitions. [2021-06-05 04:05:13,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:05:13,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:13,377 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:13,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1074,633 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:13,577 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:13,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:13,577 INFO L82 PathProgramCache]: Analyzing trace with hash -318709041, now seen corresponding path program 630 times [2021-06-05 04:05:13,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:13,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558299000] [2021-06-05 04:05:13,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:13,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:13,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558299000] [2021-06-05 04:05:13,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558299000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:13,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166735425] [2021-06-05 04:05:13,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:13,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:05:13,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:13,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:05:13,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:13,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166735425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:13,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:13,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 26 [2021-06-05 04:05:13,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485383381] [2021-06-05 04:05:13,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:05:13,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:13,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:05:13,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:05:13,807 INFO L87 Difference]: Start difference. First operand 55909 states and 179847 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:15,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:15,357 INFO L93 Difference]: Finished difference Result 67726 states and 213649 transitions. [2021-06-05 04:05:15,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 04:05:15,357 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:05:15,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:15,481 INFO L225 Difference]: With dead ends: 67726 [2021-06-05 04:05:15,482 INFO L226 Difference]: Without dead ends: 67726 [2021-06-05 04:05:15,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3072 ImplicationChecksByTransitivity, 1152.7ms TimeCoverageRelationStatistics Valid=2751, Invalid=5991, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 04:05:15,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67726 states. [2021-06-05 04:05:16,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67726 to 57648. [2021-06-05 04:05:16,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57648 states, 57647 states have (on average 3.2164206290006416) internal successors, (185417), 57647 states have internal predecessors, (185417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:16,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57648 states to 57648 states and 185417 transitions. [2021-06-05 04:05:16,721 INFO L78 Accepts]: Start accepts. Automaton has 57648 states and 185417 transitions. Word has length 26 [2021-06-05 04:05:16,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:16,721 INFO L482 AbstractCegarLoop]: Abstraction has 57648 states and 185417 transitions. [2021-06-05 04:05:16,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:16,722 INFO L276 IsEmpty]: Start isEmpty. Operand 57648 states and 185417 transitions. [2021-06-05 04:05:16,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:05:16,804 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:16,804 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:17,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1075,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:17,005 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:17,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:17,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1211422889, now seen corresponding path program 631 times [2021-06-05 04:05:17,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:17,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878522188] [2021-06-05 04:05:17,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:17,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:17,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878522188] [2021-06-05 04:05:17,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878522188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:17,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168499611] [2021-06-05 04:05:17,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:17,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:05:17,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:17,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168499611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:17,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:17,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 25 [2021-06-05 04:05:17,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073775790] [2021-06-05 04:05:17,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:05:17,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:17,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:05:17,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:05:17,229 INFO L87 Difference]: Start difference. First operand 57648 states and 185417 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:17,875 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 7 [2021-06-05 04:05:18,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:18,690 INFO L93 Difference]: Finished difference Result 81582 states and 257737 transitions. [2021-06-05 04:05:18,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 04:05:18,690 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:05:18,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:18,856 INFO L225 Difference]: With dead ends: 81582 [2021-06-05 04:05:18,856 INFO L226 Difference]: Without dead ends: 81582 [2021-06-05 04:05:18,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3004 ImplicationChecksByTransitivity, 1029.7ms TimeCoverageRelationStatistics Valid=2766, Invalid=5424, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 04:05:18,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81582 states. [2021-06-05 04:05:20,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81582 to 72472. [2021-06-05 04:05:20,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72472 states, 72471 states have (on average 3.2137406686812655) internal successors, (232903), 72471 states have internal predecessors, (232903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:20,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72472 states to 72472 states and 232903 transitions. [2021-06-05 04:05:20,655 INFO L78 Accepts]: Start accepts. Automaton has 72472 states and 232903 transitions. Word has length 26 [2021-06-05 04:05:20,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:20,655 INFO L482 AbstractCegarLoop]: Abstraction has 72472 states and 232903 transitions. [2021-06-05 04:05:20,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:20,656 INFO L276 IsEmpty]: Start isEmpty. Operand 72472 states and 232903 transitions. [2021-06-05 04:05:20,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:05:20,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:20,759 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:20,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:20,960 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:20,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:20,960 INFO L82 PathProgramCache]: Analyzing trace with hash -639968083, now seen corresponding path program 632 times [2021-06-05 04:05:20,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:20,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827848305] [2021-06-05 04:05:20,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:20,999 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:20,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:20,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827848305] [2021-06-05 04:05:20,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827848305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:20,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012654702] [2021-06-05 04:05:20,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:21,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:05:21,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:21,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:05:21,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:21,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012654702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:21,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:21,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 25 [2021-06-05 04:05:21,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638987193] [2021-06-05 04:05:21,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:05:21,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:21,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:05:21,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:05:21,183 INFO L87 Difference]: Start difference. First operand 72472 states and 232903 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:22,889 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-05 04:05:23,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:23,306 INFO L93 Difference]: Finished difference Result 78475 states and 248463 transitions. [2021-06-05 04:05:23,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-06-05 04:05:23,306 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:05:23,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:23,457 INFO L225 Difference]: With dead ends: 78475 [2021-06-05 04:05:23,457 INFO L226 Difference]: Without dead ends: 78469 [2021-06-05 04:05:23,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9089 ImplicationChecksByTransitivity, 1663.9ms TimeCoverageRelationStatistics Valid=5710, Invalid=15752, Unknown=0, NotChecked=0, Total=21462 [2021-06-05 04:05:23,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78469 states. [2021-06-05 04:05:24,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78469 to 72280. [2021-06-05 04:05:24,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72280 states, 72279 states have (on average 3.212855739564742) internal successors, (232222), 72279 states have internal predecessors, (232222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:24,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72280 states to 72280 states and 232222 transitions. [2021-06-05 04:05:24,983 INFO L78 Accepts]: Start accepts. Automaton has 72280 states and 232222 transitions. Word has length 26 [2021-06-05 04:05:24,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:24,983 INFO L482 AbstractCegarLoop]: Abstraction has 72280 states and 232222 transitions. [2021-06-05 04:05:24,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:24,984 INFO L276 IsEmpty]: Start isEmpty. Operand 72280 states and 232222 transitions. [2021-06-05 04:05:25,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:05:25,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:25,094 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:25,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1077 [2021-06-05 04:05:25,294 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:25,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:25,295 INFO L82 PathProgramCache]: Analyzing trace with hash -104738281, now seen corresponding path program 633 times [2021-06-05 04:05:25,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:25,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965002867] [2021-06-05 04:05:25,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:25,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:25,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:25,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965002867] [2021-06-05 04:05:25,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965002867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:25,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101234496] [2021-06-05 04:05:25,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:25,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:05:25,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:25,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:05:25,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:25,732 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:25,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101234496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:25,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:25,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 26 [2021-06-05 04:05:25,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521315243] [2021-06-05 04:05:25,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 04:05:25,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:25,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 04:05:25,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:05:25,733 INFO L87 Difference]: Start difference. First operand 72280 states and 232222 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:27,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:27,580 INFO L93 Difference]: Finished difference Result 78426 states and 248532 transitions. [2021-06-05 04:05:27,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-06-05 04:05:27,580 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:05:27,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:27,956 INFO L225 Difference]: With dead ends: 78426 [2021-06-05 04:05:27,956 INFO L226 Difference]: Without dead ends: 78414 [2021-06-05 04:05:27,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7797 ImplicationChecksByTransitivity, 1397.0ms TimeCoverageRelationStatistics Valid=4932, Invalid=13974, Unknown=0, NotChecked=0, Total=18906 [2021-06-05 04:05:28,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78414 states. [2021-06-05 04:05:29,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78414 to 72179. [2021-06-05 04:05:29,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72179 states, 72178 states have (on average 3.2131674471445595) internal successors, (231920), 72178 states have internal predecessors, (231920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:29,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72179 states to 72179 states and 231920 transitions. [2021-06-05 04:05:29,376 INFO L78 Accepts]: Start accepts. Automaton has 72179 states and 231920 transitions. Word has length 26 [2021-06-05 04:05:29,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:29,376 INFO L482 AbstractCegarLoop]: Abstraction has 72179 states and 231920 transitions. [2021-06-05 04:05:29,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:29,376 INFO L276 IsEmpty]: Start isEmpty. Operand 72179 states and 231920 transitions. [2021-06-05 04:05:29,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:05:29,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:29,473 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:29,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1078,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:29,674 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:29,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:29,674 INFO L82 PathProgramCache]: Analyzing trace with hash -692483603, now seen corresponding path program 634 times [2021-06-05 04:05:29,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:29,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243954557] [2021-06-05 04:05:29,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:29,725 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:29,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:29,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243954557] [2021-06-05 04:05:29,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243954557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:29,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141454710] [2021-06-05 04:05:29,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:29,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:05:29,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:29,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:05:29,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:29,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141454710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:29,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:29,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 27 [2021-06-05 04:05:29,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145887190] [2021-06-05 04:05:29,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 04:05:29,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:29,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 04:05:29,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:05:29,894 INFO L87 Difference]: Start difference. First operand 72179 states and 231920 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:31,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:31,806 INFO L93 Difference]: Finished difference Result 78576 states and 249157 transitions. [2021-06-05 04:05:31,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-06-05 04:05:31,806 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:05:31,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:31,964 INFO L225 Difference]: With dead ends: 78576 [2021-06-05 04:05:31,964 INFO L226 Difference]: Without dead ends: 78558 [2021-06-05 04:05:31,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6710 ImplicationChecksByTransitivity, 1462.6ms TimeCoverageRelationStatistics Valid=4267, Invalid=12503, Unknown=0, NotChecked=0, Total=16770 [2021-06-05 04:05:32,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78558 states. [2021-06-05 04:05:33,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78558 to 72212. [2021-06-05 04:05:33,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72212 states, 72211 states have (on average 3.213554721579815) internal successors, (232054), 72211 states have internal predecessors, (232054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:33,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72212 states to 72212 states and 232054 transitions. [2021-06-05 04:05:33,683 INFO L78 Accepts]: Start accepts. Automaton has 72212 states and 232054 transitions. Word has length 26 [2021-06-05 04:05:33,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:33,683 INFO L482 AbstractCegarLoop]: Abstraction has 72212 states and 232054 transitions. [2021-06-05 04:05:33,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:33,683 INFO L276 IsEmpty]: Start isEmpty. Operand 72212 states and 232054 transitions. [2021-06-05 04:05:33,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:05:33,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:33,777 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:33,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 638 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1079 [2021-06-05 04:05:33,977 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:33,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:33,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1732719401, now seen corresponding path program 635 times [2021-06-05 04:05:33,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:33,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078022262] [2021-06-05 04:05:33,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:34,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:34,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078022262] [2021-06-05 04:05:34,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078022262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:34,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183326390] [2021-06-05 04:05:34,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:34,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:05:34,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:34,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:05:34,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:34,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183326390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:34,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:34,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2021-06-05 04:05:34,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837571301] [2021-06-05 04:05:34,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 04:05:34,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:34,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 04:05:34,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:05:34,255 INFO L87 Difference]: Start difference. First operand 72212 states and 232054 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:36,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:36,034 INFO L93 Difference]: Finished difference Result 79000 states and 250606 transitions. [2021-06-05 04:05:36,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-06-05 04:05:36,034 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:05:36,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:36,192 INFO L225 Difference]: With dead ends: 79000 [2021-06-05 04:05:36,193 INFO L226 Difference]: Without dead ends: 78976 [2021-06-05 04:05:36,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5805 ImplicationChecksByTransitivity, 1224.9ms TimeCoverageRelationStatistics Valid=3724, Invalid=11282, Unknown=0, NotChecked=0, Total=15006 [2021-06-05 04:05:36,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78976 states. [2021-06-05 04:05:37,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78976 to 72503. [2021-06-05 04:05:37,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72503 states, 72502 states have (on average 3.2139940967145733) internal successors, (233021), 72502 states have internal predecessors, (233021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:37,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72503 states to 72503 states and 233021 transitions. [2021-06-05 04:05:37,675 INFO L78 Accepts]: Start accepts. Automaton has 72503 states and 233021 transitions. Word has length 26 [2021-06-05 04:05:37,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:37,675 INFO L482 AbstractCegarLoop]: Abstraction has 72503 states and 233021 transitions. [2021-06-05 04:05:37,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:37,675 INFO L276 IsEmpty]: Start isEmpty. Operand 72503 states and 233021 transitions. [2021-06-05 04:05:37,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:05:37,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:37,775 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:37,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1080,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:37,975 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:37,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:37,975 INFO L82 PathProgramCache]: Analyzing trace with hash 379709229, now seen corresponding path program 636 times [2021-06-05 04:05:37,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:37,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202439819] [2021-06-05 04:05:37,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:37,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:38,040 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:38,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:38,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202439819] [2021-06-05 04:05:38,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202439819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:38,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140171085] [2021-06-05 04:05:38,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:38,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:05:38,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:38,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:05:38,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:38,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140171085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:38,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:38,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 29 [2021-06-05 04:05:38,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143143448] [2021-06-05 04:05:38,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 04:05:38,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:38,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 04:05:38,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:05:38,226 INFO L87 Difference]: Start difference. First operand 72503 states and 233021 transitions. Second operand has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:38,628 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 7 [2021-06-05 04:05:39,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:39,937 INFO L93 Difference]: Finished difference Result 79947 states and 253642 transitions. [2021-06-05 04:05:39,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-05 04:05:39,938 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:05:39,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:40,091 INFO L225 Difference]: With dead ends: 79947 [2021-06-05 04:05:40,091 INFO L226 Difference]: Without dead ends: 79917 [2021-06-05 04:05:40,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5077 ImplicationChecksByTransitivity, 1353.2ms TimeCoverageRelationStatistics Valid=3311, Invalid=10261, Unknown=0, NotChecked=0, Total=13572 [2021-06-05 04:05:40,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79917 states. [2021-06-05 04:05:41,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79917 to 74090. [2021-06-05 04:05:41,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74090 states, 74089 states have (on average 3.2148227132232856) internal successors, (238183), 74089 states have internal predecessors, (238183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:41,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74090 states to 74090 states and 238183 transitions. [2021-06-05 04:05:41,695 INFO L78 Accepts]: Start accepts. Automaton has 74090 states and 238183 transitions. Word has length 26 [2021-06-05 04:05:41,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:41,695 INFO L482 AbstractCegarLoop]: Abstraction has 74090 states and 238183 transitions. [2021-06-05 04:05:41,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:41,696 INFO L276 IsEmpty]: Start isEmpty. Operand 74090 states and 238183 transitions. [2021-06-05 04:05:41,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 04:05:41,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:41,795 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:41,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1081 [2021-06-05 04:05:41,995 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:41,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:41,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1440487319, now seen corresponding path program 637 times [2021-06-05 04:05:41,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:41,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031999946] [2021-06-05 04:05:41,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:42,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:42,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031999946] [2021-06-05 04:05:42,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031999946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:42,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78143611] [2021-06-05 04:05:42,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:42,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:05:42,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:42,249 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:42,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78143611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:42,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:42,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-05 04:05:42,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443470449] [2021-06-05 04:05:42,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 04:05:42,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:42,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 04:05:42,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:05:42,250 INFO L87 Difference]: Start difference. First operand 74090 states and 238183 transitions. Second operand has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:43,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:43,895 INFO L93 Difference]: Finished difference Result 81814 states and 259655 transitions. [2021-06-05 04:05:43,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 04:05:43,896 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 04:05:43,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:44,057 INFO L225 Difference]: With dead ends: 81814 [2021-06-05 04:05:44,057 INFO L226 Difference]: Without dead ends: 81778 [2021-06-05 04:05:44,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4527 ImplicationChecksByTransitivity, 1289.4ms TimeCoverageRelationStatistics Valid=3035, Invalid=9397, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 04:05:44,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81778 states. Received shutdown request... [2021-06-05 04:05:45,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1082 [2021-06-05 04:05:45,086 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 04:05:45,087 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 04:05:45,089 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 04:05:45,090 INFO L202 PluginConnector]: Adding new model fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:05:45 BasicIcfg [2021-06-05 04:05:45,090 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 04:05:45,090 INFO L168 Benchmark]: Toolchain (without parser) took 868311.79 ms. Allocated memory was 400.6 MB in the beginning and 15.9 GB in the end (delta: 15.4 GB). Free memory was 380.5 MB in the beginning and 12.6 GB in the end (delta: -12.2 GB). Peak memory consumption was 3.8 GB. Max. memory is 16.0 GB. [2021-06-05 04:05:45,090 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 400.6 MB. Free memory was 381.7 MB in the beginning and 381.6 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:05:45,090 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.40 ms. Allocated memory is still 400.6 MB. Free memory was 380.4 MB in the beginning and 379.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 04:05:45,090 INFO L168 Benchmark]: Boogie Preprocessor took 11.76 ms. Allocated memory is still 400.6 MB. Free memory was 379.0 MB in the beginning and 378.1 MB in the end (delta: 891.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:05:45,090 INFO L168 Benchmark]: RCFGBuilder took 230.24 ms. Allocated memory is still 400.6 MB. Free memory was 378.0 MB in the beginning and 363.6 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 04:05:45,090 INFO L168 Benchmark]: TraceAbstraction took 868045.78 ms. Allocated memory was 400.6 MB in the beginning and 15.9 GB in the end (delta: 15.4 GB). Free memory was 363.1 MB in the beginning and 12.6 GB in the end (delta: -12.2 GB). Peak memory consumption was 3.8 GB. Max. memory is 16.0 GB. [2021-06-05 04:05:45,091 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 400.6 MB. Free memory was 381.7 MB in the beginning and 381.6 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.40 ms. Allocated memory is still 400.6 MB. Free memory was 380.4 MB in the beginning and 379.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.76 ms. Allocated memory is still 400.6 MB. Free memory was 379.0 MB in the beginning and 378.1 MB in the end (delta: 891.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 230.24 ms. Allocated memory is still 400.6 MB. Free memory was 378.0 MB in the beginning and 363.6 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 868045.78 ms. Allocated memory was 400.6 MB in the beginning and 15.9 GB in the end (delta: 15.4 GB). Free memory was 363.1 MB in the beginning and 12.6 GB in the end (delta: -12.2 GB). Peak memory consumption was 3.8 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 867958.4ms, OverallIterations: 651, TraceHistogramMax: 7, EmptinessCheckTime: 13347.4ms, AutomataDifference: 395322.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 31058 SDtfs, 106262 SDslu, 282522 SDs, 0 SdLazy, 253932 SolverSat, 22298 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 88607.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43639 GetRequests, 10100 SyntacticMatches, 797 SemanticMatches, 32742 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727802 ImplicationChecksByTransitivity, 305676.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=74090occurred in iteration=650, InterpolantAutomatonStates: 27989, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 189758.4ms AutomataMinimizationTime, 651 MinimizatonAttempts, 1003243 StatesRemovedByMinimization, 648 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2047.3ms SsaConstructionTime, 7347.7ms SatisfiabilityAnalysisTime, 118397.9ms InterpolantComputationTime, 29068 NumberOfCodeBlocks, 29068 NumberOfCodeBlocksAsserted, 2551 NumberOfCheckSat, 27777 ConstructedInterpolants, 0 QuantifiedInterpolants, 184055 SizeOfPredicates, 1712 NumberOfNonLiveVariables, 63446 ConjunctsInSsa, 14496 ConjunctsInUnsatCore, 1291 InterpolantComputations, 11 PerfectInterpolantSequences, 12289/38645 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown