/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-Separate.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 13:42:11,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 13:42:11,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 13:42:11,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 13:42:11,364 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-Separate.epf [2021-06-05 13:42:11,379 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 13:42:11,379 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 13:42:11,379 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 13:42:11,379 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 13:42:11,380 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 13:42:11,380 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 13:42:11,380 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 13:42:11,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 13:42:11,380 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 13:42:11,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 13:42:11,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 13:42:11,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 13:42:11,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 13:42:11,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 13:42:11,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 13:42:11,381 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 13:42:11,381 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 13:42:11,381 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 13:42:11,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 13:42:11,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 13:42:11,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 13:42:11,381 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 13:42:11,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 13:42:11,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:42:11,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 13:42:11,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 13:42:11,382 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 13:42:11,382 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 13:42:11,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 13:42:11,382 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 13:42:11,382 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 13:42:11,382 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 13:42:11,382 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 13:42:11,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 13:42:11,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 13:42:11,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 13:42:11,633 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 13:42:11,636 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 13:42:11,637 INFO L432 ainManager$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 13:42:11,637 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/fibonacci.wvr.bpl' [2021-06-05 13:42:11,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 13:42:11,668 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 13:42:11,669 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 13:42:11,669 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 13:42:11,669 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 13:42:11,678 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 01:42:11" (1/1) ... [2021-06-05 13:42:11,683 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 01:42:11" (1/1) ... [2021-06-05 13:42:11,687 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 13:42:11,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 13:42:11,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 13:42:11,690 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 13:42:11,695 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 01:42:11" (1/1) ... [2021-06-05 13:42:11,695 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 01:42:11" (1/1) ... [2021-06-05 13:42:11,696 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 01:42:11" (1/1) ... [2021-06-05 13:42:11,696 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 01:42:11" (1/1) ... [2021-06-05 13:42:11,697 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 01:42:11" (1/1) ... [2021-06-05 13:42:11,699 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 01:42:11" (1/1) ... [2021-06-05 13:42:11,699 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 01:42:11" (1/1) ... [2021-06-05 13:42:11,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 13:42:11,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 13:42:11,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 13:42:11,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 13:42:11,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:42:11" (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 13:42:11,746 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 13:42:11,746 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 13:42:11,746 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 13:42:11,746 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 13:42:11,746 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 13:42:11,746 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 13:42:11,747 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 13:42:11,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 13:42:11,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 13:42:11,747 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 13:42:11,878 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 13:42:11,879 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 13:42:11,880 INFO L202 PluginConnector]: Adding new model fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:42:11 BoogieIcfgContainer [2021-06-05 13:42:11,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 13:42:11,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 13:42:11,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 13:42:11,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 13:42:11,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:42:11" (1/2) ... [2021-06-05 13:42:11,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79dc02ab and model type fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 01:42:11, skipping insertion in model container [2021-06-05 13:42:11,884 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 01:42:11" (2/2) ... [2021-06-05 13:42:11,885 INFO L111 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.bpl [2021-06-05 13:42:11,888 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 13:42:11,889 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 13:42:11,889 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 13:42:11,889 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 13:42:11,921 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 13:42:11,935 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 13:42:11,957 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:42:11,957 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:42:11,957 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:42:11,957 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:42:11,957 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:42:11,957 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:42:11,957 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:42:11,957 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:42:11,985 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2021-06-05 13:42:11,993 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 13:42:11,999 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 13:42:12,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:42:12,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:12,003 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:12,003 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:12,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:12,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1266515445, now seen corresponding path program 1 times [2021-06-05 13:42:12,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:12,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780392214] [2021-06-05 13:42:12,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:12,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:12,284 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 13:42:12,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:12,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780392214] [2021-06-05 13:42:12,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780392214] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:42:12,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:42:12,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:42:12,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724460730] [2021-06-05 13:42:12,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:42:12,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:12,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:42:12,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:42:12,298 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 13:42:12,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:12,375 INFO L93 Difference]: Finished difference Result 61 states and 108 transitions. [2021-06-05 13:42:12,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:42:12,376 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 13:42:12,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:12,383 INFO L225 Difference]: With dead ends: 61 [2021-06-05 13:42:12,383 INFO L226 Difference]: Without dead ends: 54 [2021-06-05 13:42:12,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:42:12,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-06-05 13:42:12,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2021-06-05 13:42:12,421 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 13:42:12,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 79 transitions. [2021-06-05 13:42:12,424 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 79 transitions. Word has length 13 [2021-06-05 13:42:12,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:12,424 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 79 transitions. [2021-06-05 13:42:12,424 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 13:42:12,424 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 79 transitions. [2021-06-05 13:42:12,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:42:12,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:12,425 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:12,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 13:42:12,426 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:12,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:12,430 INFO L82 PathProgramCache]: Analyzing trace with hash 861572483, now seen corresponding path program 2 times [2021-06-05 13:42:12,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:12,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720811544] [2021-06-05 13:42:12,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:12,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:12,499 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 13:42:12,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:12,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720811544] [2021-06-05 13:42:12,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720811544] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:42:12,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:42:12,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:42:12,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59647641] [2021-06-05 13:42:12,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:42:12,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:12,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:42:12,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:42:12,502 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 13:42:12,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:12,543 INFO L93 Difference]: Finished difference Result 52 states and 95 transitions. [2021-06-05 13:42:12,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:42:12,543 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 13:42:12,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:12,544 INFO L225 Difference]: With dead ends: 52 [2021-06-05 13:42:12,544 INFO L226 Difference]: Without dead ends: 45 [2021-06-05 13:42:12,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:42:12,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-05 13:42:12,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-06-05 13:42:12,548 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 13:42:12,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 85 transitions. [2021-06-05 13:42:12,549 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 85 transitions. Word has length 13 [2021-06-05 13:42:12,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:12,549 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 85 transitions. [2021-06-05 13:42:12,550 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 13:42:12,550 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 85 transitions. [2021-06-05 13:42:12,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:42:12,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:12,550 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:12,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 13:42:12,551 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:12,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:12,551 INFO L82 PathProgramCache]: Analyzing trace with hash -580645877, now seen corresponding path program 1 times [2021-06-05 13:42:12,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:12,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768144139] [2021-06-05 13:42:12,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:12,572 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 13:42:12,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:12,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768144139] [2021-06-05 13:42:12,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768144139] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:42:12,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:42:12,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:42:12,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825682028] [2021-06-05 13:42:12,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:42:12,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:12,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:42:12,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:42:12,574 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 13:42:12,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:12,611 INFO L93 Difference]: Finished difference Result 63 states and 114 transitions. [2021-06-05 13:42:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:42:12,611 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 13:42:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:12,612 INFO L225 Difference]: With dead ends: 63 [2021-06-05 13:42:12,612 INFO L226 Difference]: Without dead ends: 55 [2021-06-05 13:42:12,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:42:12,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-06-05 13:42:12,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2021-06-05 13:42:12,615 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 13:42:12,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2021-06-05 13:42:12,616 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 14 [2021-06-05 13:42:12,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:12,616 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2021-06-05 13:42:12,616 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 13:42:12,616 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2021-06-05 13:42:12,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:42:12,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:12,617 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:12,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 13:42:12,617 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:12,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:12,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1509805029, now seen corresponding path program 1 times [2021-06-05 13:42:12,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:12,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366906712] [2021-06-05 13:42:12,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:12,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:12,639 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 13:42:12,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:12,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366906712] [2021-06-05 13:42:12,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366906712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:12,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526822208] [2021-06-05 13:42:12,640 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 13:42:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:12,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 13:42:12,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:12,782 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 13:42:12,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526822208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:12,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:12,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 13:42:12,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805201680] [2021-06-05 13:42:12,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:42:12,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:12,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:42:12,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:42:12,786 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 13:42:12,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:12,834 INFO L93 Difference]: Finished difference Result 59 states and 110 transitions. [2021-06-05 13:42:12,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:42:12,834 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 13:42:12,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:12,835 INFO L225 Difference]: With dead ends: 59 [2021-06-05 13:42:12,835 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 13:42:12,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:42:12,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 13:42:12,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2021-06-05 13:42:12,838 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 13:42:12,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 78 transitions. [2021-06-05 13:42:12,839 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 78 transitions. Word has length 14 [2021-06-05 13:42:12,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:12,839 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 78 transitions. [2021-06-05 13:42:12,839 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 13:42:12,839 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 78 transitions. [2021-06-05 13:42:12,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:42:12,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:12,839 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:13,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:13,059 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:13,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:13,060 INFO L82 PathProgramCache]: Analyzing trace with hash -709388465, now seen corresponding path program 2 times [2021-06-05 13:42:13,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:13,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132783623] [2021-06-05 13:42:13,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:13,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:13,087 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 13:42:13,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:13,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132783623] [2021-06-05 13:42:13,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132783623] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:42:13,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:42:13,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:42:13,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965293087] [2021-06-05 13:42:13,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:42:13,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:13,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:42:13,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:42:13,090 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 13:42:13,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:13,129 INFO L93 Difference]: Finished difference Result 80 states and 146 transitions. [2021-06-05 13:42:13,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:42:13,129 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 13:42:13,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:13,130 INFO L225 Difference]: With dead ends: 80 [2021-06-05 13:42:13,130 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 13:42:13,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:42:13,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 13:42:13,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 43. [2021-06-05 13:42:13,141 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 13:42:13,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 85 transitions. [2021-06-05 13:42:13,144 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 85 transitions. Word has length 14 [2021-06-05 13:42:13,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:13,144 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 85 transitions. [2021-06-05 13:42:13,144 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 13:42:13,144 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 85 transitions. [2021-06-05 13:42:13,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:42:13,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:13,145 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:13,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 13:42:13,145 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:13,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:13,146 INFO L82 PathProgramCache]: Analyzing trace with hash -137933659, now seen corresponding path program 3 times [2021-06-05 13:42:13,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:13,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019057240] [2021-06-05 13:42:13,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:13,198 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 13:42:13,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:13,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019057240] [2021-06-05 13:42:13,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019057240] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:42:13,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:42:13,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:42:13,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152382037] [2021-06-05 13:42:13,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:42:13,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:13,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:42:13,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:42:13,199 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 13:42:13,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:13,257 INFO L93 Difference]: Finished difference Result 77 states and 137 transitions. [2021-06-05 13:42:13,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:42:13,257 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 13:42:13,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:13,260 INFO L225 Difference]: With dead ends: 77 [2021-06-05 13:42:13,262 INFO L226 Difference]: Without dead ends: 74 [2021-06-05 13:42:13,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:13,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-06-05 13:42:13,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 42. [2021-06-05 13:42:13,270 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 13:42:13,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2021-06-05 13:42:13,271 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 14 [2021-06-05 13:42:13,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:13,273 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2021-06-05 13:42:13,273 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 13:42:13,273 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2021-06-05 13:42:13,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:42:13,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:13,274 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:13,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 13:42:13,274 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:13,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:13,274 INFO L82 PathProgramCache]: Analyzing trace with hash -2069505205, now seen corresponding path program 2 times [2021-06-05 13:42:13,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:13,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409088998] [2021-06-05 13:42:13,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:13,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:13,297 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 13:42:13,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:13,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409088998] [2021-06-05 13:42:13,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409088998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:13,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831486065] [2021-06-05 13:42:13,298 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 13:42:13,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:13,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:13,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 13:42:13,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:13,379 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 13:42:13,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831486065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:13,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:13,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 13:42:13,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202423335] [2021-06-05 13:42:13,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:42:13,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:13,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:42:13,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:42:13,383 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 13:42:13,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:13,407 INFO L93 Difference]: Finished difference Result 67 states and 123 transitions. [2021-06-05 13:42:13,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:42:13,407 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 13:42:13,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:13,408 INFO L225 Difference]: With dead ends: 67 [2021-06-05 13:42:13,408 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 13:42:13,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:42:13,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 13:42:13,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2021-06-05 13:42:13,419 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 13:42:13,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 84 transitions. [2021-06-05 13:42:13,421 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 84 transitions. Word has length 14 [2021-06-05 13:42:13,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:13,421 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 84 transitions. [2021-06-05 13:42:13,421 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 13:42:13,421 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 84 transitions. [2021-06-05 13:42:13,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:42:13,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:13,422 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:13,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:13,640 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:13,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:13,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1760870987, now seen corresponding path program 3 times [2021-06-05 13:42:13,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:13,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193031046] [2021-06-05 13:42:13,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:13,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:13,661 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 13:42:13,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:13,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193031046] [2021-06-05 13:42:13,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193031046] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:42:13,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:42:13,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:42:13,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870176853] [2021-06-05 13:42:13,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:42:13,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:13,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:42:13,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:42:13,662 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 13:42:13,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:13,697 INFO L93 Difference]: Finished difference Result 60 states and 108 transitions. [2021-06-05 13:42:13,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:42:13,698 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 13:42:13,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:13,698 INFO L225 Difference]: With dead ends: 60 [2021-06-05 13:42:13,698 INFO L226 Difference]: Without dead ends: 58 [2021-06-05 13:42:13,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:42:13,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-05 13:42:13,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 43. [2021-06-05 13:42:13,701 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 13:42:13,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 83 transitions. [2021-06-05 13:42:13,702 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 83 transitions. Word has length 14 [2021-06-05 13:42:13,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:13,702 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 83 transitions. [2021-06-05 13:42:13,702 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 13:42:13,702 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 83 transitions. [2021-06-05 13:42:13,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:42:13,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:13,702 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:13,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 13:42:13,702 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:13,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:13,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1740461429, now seen corresponding path program 4 times [2021-06-05 13:42:13,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:13,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936205169] [2021-06-05 13:42:13,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:13,734 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 13:42:13,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:13,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936205169] [2021-06-05 13:42:13,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936205169] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:42:13,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:42:13,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:42:13,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384180023] [2021-06-05 13:42:13,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:42:13,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:13,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:42:13,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:42:13,736 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 13:42:13,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:13,764 INFO L93 Difference]: Finished difference Result 63 states and 119 transitions. [2021-06-05 13:42:13,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:42:13,766 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 13:42:13,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:13,766 INFO L225 Difference]: With dead ends: 63 [2021-06-05 13:42:13,766 INFO L226 Difference]: Without dead ends: 63 [2021-06-05 13:42:13,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:42:13,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-05 13:42:13,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2021-06-05 13:42:13,771 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 13:42:13,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 80 transitions. [2021-06-05 13:42:13,771 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 80 transitions. Word has length 14 [2021-06-05 13:42:13,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:13,772 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 80 transitions. [2021-06-05 13:42:13,772 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 13:42:13,772 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 80 transitions. [2021-06-05 13:42:13,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:42:13,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:13,775 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:13,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 13:42:13,775 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:13,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:13,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1478794711, now seen corresponding path program 5 times [2021-06-05 13:42:13,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:13,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757377527] [2021-06-05 13:42:13,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:13,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:13,803 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 13:42:13,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:13,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757377527] [2021-06-05 13:42:13,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757377527] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:42:13,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:42:13,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:42:13,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039098236] [2021-06-05 13:42:13,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:42:13,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:13,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:42:13,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:42:13,805 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 13:42:13,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:13,836 INFO L93 Difference]: Finished difference Result 65 states and 121 transitions. [2021-06-05 13:42:13,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:42:13,837 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 13:42:13,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:13,837 INFO L225 Difference]: With dead ends: 65 [2021-06-05 13:42:13,837 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 13:42:13,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:42:13,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 13:42:13,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 41. [2021-06-05 13:42:13,839 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 13:42:13,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 80 transitions. [2021-06-05 13:42:13,839 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 80 transitions. Word has length 14 [2021-06-05 13:42:13,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:13,839 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 80 transitions. [2021-06-05 13:42:13,839 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 13:42:13,839 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 80 transitions. [2021-06-05 13:42:13,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:42:13,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:13,840 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:13,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 13:42:13,840 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:13,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:13,840 INFO L82 PathProgramCache]: Analyzing trace with hash 2050249517, now seen corresponding path program 6 times [2021-06-05 13:42:13,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:13,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747450619] [2021-06-05 13:42:13,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:13,865 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 13:42:13,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:13,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747450619] [2021-06-05 13:42:13,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747450619] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:42:13,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:42:13,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:42:13,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139492595] [2021-06-05 13:42:13,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:42:13,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:13,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:42:13,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:42:13,866 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 13:42:13,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:13,899 INFO L93 Difference]: Finished difference Result 58 states and 103 transitions. [2021-06-05 13:42:13,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:42:13,899 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 13:42:13,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:13,900 INFO L225 Difference]: With dead ends: 58 [2021-06-05 13:42:13,900 INFO L226 Difference]: Without dead ends: 55 [2021-06-05 13:42:13,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:42:13,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-06-05 13:42:13,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2021-06-05 13:42:13,901 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 13:42:13,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 73 transitions. [2021-06-05 13:42:13,901 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 73 transitions. Word has length 14 [2021-06-05 13:42:13,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:13,901 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 73 transitions. [2021-06-05 13:42:13,902 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 13:42:13,902 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 73 transitions. [2021-06-05 13:42:13,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:42:13,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:13,902 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:13,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 13:42:13,902 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:13,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:13,903 INFO L82 PathProgramCache]: Analyzing trace with hash 118677971, now seen corresponding path program 4 times [2021-06-05 13:42:13,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:13,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611737140] [2021-06-05 13:42:13,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:13,932 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 13:42:13,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:13,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611737140] [2021-06-05 13:42:13,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611737140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:13,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991940770] [2021-06-05 13:42:13,933 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 13:42:13,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:13,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:13,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 13:42:13,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:14,018 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 13:42:14,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991940770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:14,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:14,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 13:42:14,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007186169] [2021-06-05 13:42:14,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:42:14,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:14,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:42:14,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:42:14,019 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 13:42:14,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:14,048 INFO L93 Difference]: Finished difference Result 60 states and 108 transitions. [2021-06-05 13:42:14,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:42:14,049 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 13:42:14,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:14,050 INFO L225 Difference]: With dead ends: 60 [2021-06-05 13:42:14,050 INFO L226 Difference]: Without dead ends: 60 [2021-06-05 13:42:14,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:42:14,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-06-05 13:42:14,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2021-06-05 13:42:14,052 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 13:42:14,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 79 transitions. [2021-06-05 13:42:14,052 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 79 transitions. Word has length 14 [2021-06-05 13:42:14,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:14,052 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 79 transitions. [2021-06-05 13:42:14,052 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 13:42:14,053 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 79 transitions. [2021-06-05 13:42:14,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:42:14,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:14,054 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:14,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 13:42:14,270 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:14,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:14,271 INFO L82 PathProgramCache]: Analyzing trace with hash -345913133, now seen corresponding path program 5 times [2021-06-05 13:42:14,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:14,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749699983] [2021-06-05 13:42:14,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:14,289 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 13:42:14,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:14,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749699983] [2021-06-05 13:42:14,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749699983] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:42:14,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:42:14,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:42:14,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402387345] [2021-06-05 13:42:14,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:42:14,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:14,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:42:14,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:42:14,290 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 13:42:14,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:14,340 INFO L93 Difference]: Finished difference Result 74 states and 127 transitions. [2021-06-05 13:42:14,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:42:14,340 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 13:42:14,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:14,341 INFO L225 Difference]: With dead ends: 74 [2021-06-05 13:42:14,341 INFO L226 Difference]: Without dead ends: 72 [2021-06-05 13:42:14,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:14,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-06-05 13:42:14,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2021-06-05 13:42:14,342 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 13:42:14,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2021-06-05 13:42:14,342 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 14 [2021-06-05 13:42:14,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:14,342 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2021-06-05 13:42:14,342 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 13:42:14,343 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2021-06-05 13:42:14,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:42:14,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:14,343 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:14,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 13:42:14,343 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:14,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:14,343 INFO L82 PathProgramCache]: Analyzing trace with hash 36807255, now seen corresponding path program 6 times [2021-06-05 13:42:14,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:14,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992013723] [2021-06-05 13:42:14,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:14,356 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 13:42:14,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:14,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992013723] [2021-06-05 13:42:14,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992013723] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:42:14,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:42:14,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:42:14,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104837257] [2021-06-05 13:42:14,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:42:14,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:14,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:42:14,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:42:14,358 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 13:42:14,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:14,386 INFO L93 Difference]: Finished difference Result 44 states and 80 transitions. [2021-06-05 13:42:14,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:42:14,387 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 13:42:14,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:14,387 INFO L225 Difference]: With dead ends: 44 [2021-06-05 13:42:14,387 INFO L226 Difference]: Without dead ends: 40 [2021-06-05 13:42:14,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:42:14,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-06-05 13:42:14,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-06-05 13:42:14,388 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 13:42:14,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2021-06-05 13:42:14,388 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 14 [2021-06-05 13:42:14,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:14,389 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2021-06-05 13:42:14,389 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 13:42:14,389 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2021-06-05 13:42:14,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:42:14,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:14,389 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:14,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 13:42:14,389 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:14,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:14,390 INFO L82 PathProgramCache]: Analyzing trace with hash 467311611, now seen corresponding path program 1 times [2021-06-05 13:42:14,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:14,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503186538] [2021-06-05 13:42:14,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:14,454 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 13:42:14,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:14,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503186538] [2021-06-05 13:42:14,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503186538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:14,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342201705] [2021-06-05 13:42:14,455 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 13:42:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:14,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:42:14,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:14,558 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 13:42:14,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342201705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:14,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:14,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 13:42:14,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591248099] [2021-06-05 13:42:14,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:42:14,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:14,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:42:14,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:42:14,560 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 13:42:14,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:14,628 INFO L93 Difference]: Finished difference Result 61 states and 113 transitions. [2021-06-05 13:42:14,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:42:14,629 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 13:42:14,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:14,629 INFO L225 Difference]: With dead ends: 61 [2021-06-05 13:42:14,629 INFO L226 Difference]: Without dead ends: 54 [2021-06-05 13:42:14,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:14,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-06-05 13:42:14,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2021-06-05 13:42:14,634 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 13:42:14,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 97 transitions. [2021-06-05 13:42:14,634 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 97 transitions. Word has length 15 [2021-06-05 13:42:14,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:14,634 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 97 transitions. [2021-06-05 13:42:14,634 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 13:42:14,634 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 97 transitions. [2021-06-05 13:42:14,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:42:14,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:14,635 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:14,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:14,837 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:14,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:14,837 INFO L82 PathProgramCache]: Analyzing trace with hash 338569023, now seen corresponding path program 2 times [2021-06-05 13:42:14,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:14,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091428043] [2021-06-05 13:42:14,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:14,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:14,935 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 13:42:14,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:14,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091428043] [2021-06-05 13:42:14,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091428043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:14,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170234990] [2021-06-05 13:42:14,935 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 13:42:14,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:14,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:14,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:42:14,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:15,032 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 13:42:15,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170234990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:15,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:15,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 13:42:15,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121042529] [2021-06-05 13:42:15,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:15,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:15,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:15,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:15,034 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 13:42:15,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:15,085 INFO L93 Difference]: Finished difference Result 76 states and 137 transitions. [2021-06-05 13:42:15,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:42:15,085 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 13:42:15,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:15,086 INFO L225 Difference]: With dead ends: 76 [2021-06-05 13:42:15,086 INFO L226 Difference]: Without dead ends: 69 [2021-06-05 13:42:15,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:15,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-05 13:42:15,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2021-06-05 13:42:15,087 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 13:42:15,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2021-06-05 13:42:15,088 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 15 [2021-06-05 13:42:15,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:15,088 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2021-06-05 13:42:15,088 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 13:42:15,088 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2021-06-05 13:42:15,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:42:15,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:15,089 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:15,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 13:42:15,304 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:15,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:15,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1953271747, now seen corresponding path program 3 times [2021-06-05 13:42:15,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:15,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679543864] [2021-06-05 13:42:15,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:15,379 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 13:42:15,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:15,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679543864] [2021-06-05 13:42:15,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679543864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:15,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522715752] [2021-06-05 13:42:15,379 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 13:42:15,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:42:15,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:15,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:42:15,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:15,482 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 13:42:15,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522715752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:15,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:15,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 13:42:15,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983780431] [2021-06-05 13:42:15,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:15,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:15,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:15,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:15,484 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 13:42:15,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:15,539 INFO L93 Difference]: Finished difference Result 64 states and 119 transitions. [2021-06-05 13:42:15,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:42:15,539 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 13:42:15,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:15,539 INFO L225 Difference]: With dead ends: 64 [2021-06-05 13:42:15,539 INFO L226 Difference]: Without dead ends: 57 [2021-06-05 13:42:15,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:15,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-06-05 13:42:15,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2021-06-05 13:42:15,541 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 13:42:15,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2021-06-05 13:42:15,541 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 15 [2021-06-05 13:42:15,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:15,541 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2021-06-05 13:42:15,541 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 13:42:15,541 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2021-06-05 13:42:15,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:42:15,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:15,541 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:15,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:15,757 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:15,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:15,757 INFO L82 PathProgramCache]: Analyzing trace with hash -713510149, now seen corresponding path program 4 times [2021-06-05 13:42:15,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:15,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478495409] [2021-06-05 13:42:15,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:15,826 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 13:42:15,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:15,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478495409] [2021-06-05 13:42:15,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478495409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:15,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254207149] [2021-06-05 13:42:15,826 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) [2021-06-05 13:42:15,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:15,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:15,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:42:15,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:15,928 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 13:42:15,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254207149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:15,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:15,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 13:42:15,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753727464] [2021-06-05 13:42:15,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:15,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:15,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:15,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:15,931 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 13:42:15,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:15,984 INFO L93 Difference]: Finished difference Result 80 states and 148 transitions. [2021-06-05 13:42:15,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:42:15,984 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 13:42:15,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:15,985 INFO L225 Difference]: With dead ends: 80 [2021-06-05 13:42:15,986 INFO L226 Difference]: Without dead ends: 73 [2021-06-05 13:42:15,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:15,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-06-05 13:42:15,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 55. [2021-06-05 13:42:15,989 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 13:42:15,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 111 transitions. [2021-06-05 13:42:15,990 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 111 transitions. Word has length 15 [2021-06-05 13:42:15,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:15,990 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 111 transitions. [2021-06-05 13:42:15,990 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 13:42:15,990 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 111 transitions. [2021-06-05 13:42:15,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:42:15,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:15,992 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:16,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:16,210 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:16,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:16,210 INFO L82 PathProgramCache]: Analyzing trace with hash 901192575, now seen corresponding path program 5 times [2021-06-05 13:42:16,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:16,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605254933] [2021-06-05 13:42:16,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:16,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:16,286 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 13:42:16,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:16,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605254933] [2021-06-05 13:42:16,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605254933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:16,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094244155] [2021-06-05 13:42:16,286 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 13:42:16,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:16,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:16,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:42:16,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:16,374 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 13:42:16,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094244155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:16,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:16,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 13:42:16,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333816179] [2021-06-05 13:42:16,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:16,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:16,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:16,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:16,376 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 13:42:16,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:16,429 INFO L93 Difference]: Finished difference Result 82 states and 150 transitions. [2021-06-05 13:42:16,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:42:16,429 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 13:42:16,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:16,429 INFO L225 Difference]: With dead ends: 82 [2021-06-05 13:42:16,429 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 13:42:16,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:16,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 13:42:16,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2021-06-05 13:42:16,431 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 13:42:16,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 107 transitions. [2021-06-05 13:42:16,431 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 107 transitions. Word has length 15 [2021-06-05 13:42:16,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:16,431 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 107 transitions. [2021-06-05 13:42:16,431 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 13:42:16,431 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 107 transitions. [2021-06-05 13:42:16,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:42:16,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:16,432 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:16,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 13:42:16,632 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:16,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:16,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1178101253, now seen corresponding path program 6 times [2021-06-05 13:42:16,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:16,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877357382] [2021-06-05 13:42:16,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:16,695 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 13:42:16,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:16,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877357382] [2021-06-05 13:42:16,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877357382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:16,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491173451] [2021-06-05 13:42:16,696 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 13:42:16,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 13:42:16,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:16,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:42:16,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:16,762 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 13:42:16,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491173451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:16,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:16,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 13:42:16,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418302726] [2021-06-05 13:42:16,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:42:16,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:16,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:42:16,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:42:16,763 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 13:42:16,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:16,812 INFO L93 Difference]: Finished difference Result 67 states and 126 transitions. [2021-06-05 13:42:16,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:42:16,812 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 13:42:16,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:16,812 INFO L225 Difference]: With dead ends: 67 [2021-06-05 13:42:16,813 INFO L226 Difference]: Without dead ends: 60 [2021-06-05 13:42:16,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:16,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-06-05 13:42:16,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2021-06-05 13:42:16,814 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 13:42:16,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 113 transitions. [2021-06-05 13:42:16,814 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 113 transitions. Word has length 15 [2021-06-05 13:42:16,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:16,814 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 113 transitions. [2021-06-05 13:42:16,814 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 13:42:16,814 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 113 transitions. [2021-06-05 13:42:16,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:42:16,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:16,815 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:17,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:17,030 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:17,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:17,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1628385307, now seen corresponding path program 7 times [2021-06-05 13:42:17,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:17,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111655548] [2021-06-05 13:42:17,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:17,053 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 13:42:17,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:17,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111655548] [2021-06-05 13:42:17,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111655548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:17,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767316422] [2021-06-05 13:42:17,053 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 13:42:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:17,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:42:17,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:17,125 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 13:42:17,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767316422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:17,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:17,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 13:42:17,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304715921] [2021-06-05 13:42:17,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:17,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:17,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:17,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:17,126 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 13:42:17,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:17,181 INFO L93 Difference]: Finished difference Result 84 states and 155 transitions. [2021-06-05 13:42:17,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:17,181 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 13:42:17,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:17,182 INFO L225 Difference]: With dead ends: 84 [2021-06-05 13:42:17,182 INFO L226 Difference]: Without dead ends: 73 [2021-06-05 13:42:17,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:42:17,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-06-05 13:42:17,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2021-06-05 13:42:17,183 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 13:42:17,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 103 transitions. [2021-06-05 13:42:17,184 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 103 transitions. Word has length 16 [2021-06-05 13:42:17,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:17,184 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 103 transitions. [2021-06-05 13:42:17,184 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 13:42:17,184 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 103 transitions. [2021-06-05 13:42:17,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:42:17,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:17,184 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:17,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:17,391 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:17,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:17,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1405744629, now seen corresponding path program 8 times [2021-06-05 13:42:17,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:17,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215286736] [2021-06-05 13:42:17,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:17,414 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 13:42:17,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:17,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215286736] [2021-06-05 13:42:17,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215286736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:17,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11768054] [2021-06-05 13:42:17,414 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 13:42:17,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:17,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:17,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:42:17,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:17,470 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 13:42:17,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11768054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:17,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:17,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 13:42:17,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859633538] [2021-06-05 13:42:17,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:17,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:17,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:17,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:17,471 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 13:42:17,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:17,516 INFO L93 Difference]: Finished difference Result 81 states and 154 transitions. [2021-06-05 13:42:17,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:42:17,516 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 13:42:17,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:17,517 INFO L225 Difference]: With dead ends: 81 [2021-06-05 13:42:17,517 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 13:42:17,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:17,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 13:42:17,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2021-06-05 13:42:17,518 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 13:42:17,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 106 transitions. [2021-06-05 13:42:17,519 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 106 transitions. Word has length 16 [2021-06-05 13:42:17,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:17,519 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 106 transitions. [2021-06-05 13:42:17,519 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 13:42:17,519 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 106 transitions. [2021-06-05 13:42:17,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:42:17,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:17,519 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:17,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 13:42:17,733 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:17,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:17,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1226449649, now seen corresponding path program 9 times [2021-06-05 13:42:17,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:17,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857659658] [2021-06-05 13:42:17,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:17,754 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 13:42:17,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:17,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857659658] [2021-06-05 13:42:17,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857659658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:17,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316099260] [2021-06-05 13:42:17,755 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 13:42:17,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:42:17,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:17,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:42:17,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:17,831 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 13:42:17,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316099260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:17,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:17,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 13:42:17,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724930733] [2021-06-05 13:42:17,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:17,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:17,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:17,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:17,833 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 13:42:17,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:17,925 INFO L93 Difference]: Finished difference Result 154 states and 282 transitions. [2021-06-05 13:42:17,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:42:17,925 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 13:42:17,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:17,925 INFO L225 Difference]: With dead ends: 154 [2021-06-05 13:42:17,926 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 13:42:17,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:42:17,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 13:42:17,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 62. [2021-06-05 13:42:17,927 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 13:42:17,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 132 transitions. [2021-06-05 13:42:17,928 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 132 transitions. Word has length 16 [2021-06-05 13:42:17,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:17,928 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 132 transitions. [2021-06-05 13:42:17,928 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 13:42:17,928 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 132 transitions. [2021-06-05 13:42:17,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:42:17,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:17,928 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:18,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 13:42:18,142 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:18,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:18,142 INFO L82 PathProgramCache]: Analyzing trace with hash -654994843, now seen corresponding path program 10 times [2021-06-05 13:42:18,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:18,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667334678] [2021-06-05 13:42:18,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:18,162 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 13:42:18,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:18,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667334678] [2021-06-05 13:42:18,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667334678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:18,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174377095] [2021-06-05 13:42:18,163 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 13:42:18,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:18,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:18,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:42:18,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:18,244 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 13:42:18,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174377095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:18,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:18,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 13:42:18,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265276227] [2021-06-05 13:42:18,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:18,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:18,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:18,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:18,245 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 13:42:18,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:18,372 INFO L93 Difference]: Finished difference Result 157 states and 283 transitions. [2021-06-05 13:42:18,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:42:18,373 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 13:42:18,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:18,373 INFO L225 Difference]: With dead ends: 157 [2021-06-05 13:42:18,373 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 13:42:18,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:42:18,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 13:42:18,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 63. [2021-06-05 13:42:18,375 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 13:42:18,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 130 transitions. [2021-06-05 13:42:18,375 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 130 transitions. Word has length 16 [2021-06-05 13:42:18,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:18,376 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 130 transitions. [2021-06-05 13:42:18,376 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 13:42:18,376 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 130 transitions. [2021-06-05 13:42:18,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:42:18,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:18,376 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:18,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 13:42:18,589 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:18,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:18,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1708400907, now seen corresponding path program 11 times [2021-06-05 13:42:18,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:18,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778124583] [2021-06-05 13:42:18,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:18,609 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 13:42:18,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:18,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778124583] [2021-06-05 13:42:18,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778124583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:18,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331190440] [2021-06-05 13:42:18,610 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 13:42:18,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:18,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:18,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:42:18,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:18,684 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 13:42:18,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331190440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:18,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:18,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 13:42:18,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160092591] [2021-06-05 13:42:18,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:18,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:18,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:18,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:18,685 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 13:42:18,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:18,760 INFO L93 Difference]: Finished difference Result 160 states and 307 transitions. [2021-06-05 13:42:18,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:42:18,761 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 13:42:18,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:18,761 INFO L225 Difference]: With dead ends: 160 [2021-06-05 13:42:18,761 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 13:42:18,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:42:18,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 13:42:18,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 70. [2021-06-05 13:42:18,763 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 13:42:18,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 153 transitions. [2021-06-05 13:42:18,763 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 153 transitions. Word has length 16 [2021-06-05 13:42:18,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:18,764 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 153 transitions. [2021-06-05 13:42:18,764 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 13:42:18,764 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 153 transitions. [2021-06-05 13:42:18,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:42:18,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:18,764 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:18,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:18,965 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:18,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:18,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1243809803, now seen corresponding path program 12 times [2021-06-05 13:42:18,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:18,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718799272] [2021-06-05 13:42:18,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:18,987 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 13:42:18,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:18,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718799272] [2021-06-05 13:42:18,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718799272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:18,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134753863] [2021-06-05 13:42:18,988 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 13:42:19,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:42:19,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:19,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:42:19,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:19,050 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 13:42:19,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134753863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:19,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:19,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 13:42:19,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765771190] [2021-06-05 13:42:19,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:19,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:19,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:19,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:19,051 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 13:42:19,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:19,152 INFO L93 Difference]: Finished difference Result 114 states and 223 transitions. [2021-06-05 13:42:19,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:42:19,153 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 13:42:19,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:19,153 INFO L225 Difference]: With dead ends: 114 [2021-06-05 13:42:19,153 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 13:42:19,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:42:19,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 13:42:19,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 72. [2021-06-05 13:42:19,155 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 13:42:19,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 155 transitions. [2021-06-05 13:42:19,155 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 155 transitions. Word has length 16 [2021-06-05 13:42:19,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:19,155 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 155 transitions. [2021-06-05 13:42:19,155 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 13:42:19,155 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 155 transitions. [2021-06-05 13:42:19,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:42:19,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:19,156 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:19,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 13:42:19,372 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:19,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:19,372 INFO L82 PathProgramCache]: Analyzing trace with hash -119765041, now seen corresponding path program 13 times [2021-06-05 13:42:19,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:19,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714940777] [2021-06-05 13:42:19,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:19,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:19,393 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 13:42:19,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:19,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714940777] [2021-06-05 13:42:19,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714940777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:19,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257531160] [2021-06-05 13:42:19,394 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 13:42:19,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:19,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:42:19,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:19,462 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 13:42:19,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257531160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:19,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:19,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 13:42:19,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901024302] [2021-06-05 13:42:19,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:19,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:19,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:19,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:19,464 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 13:42:19,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:19,557 INFO L93 Difference]: Finished difference Result 132 states and 247 transitions. [2021-06-05 13:42:19,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:42:19,558 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 13:42:19,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:19,558 INFO L225 Difference]: With dead ends: 132 [2021-06-05 13:42:19,558 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 13:42:19,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:42:19,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 13:42:19,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2021-06-05 13:42:19,560 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 13:42:19,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 153 transitions. [2021-06-05 13:42:19,560 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 153 transitions. Word has length 16 [2021-06-05 13:42:19,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:19,561 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 153 transitions. [2021-06-05 13:42:19,561 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 13:42:19,561 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 153 transitions. [2021-06-05 13:42:19,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:42:19,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:19,561 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:19,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 13:42:19,777 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:19,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:19,777 INFO L82 PathProgramCache]: Analyzing trace with hash -841282353, now seen corresponding path program 14 times [2021-06-05 13:42:19,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:19,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973917914] [2021-06-05 13:42:19,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:19,794 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 13:42:19,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:19,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973917914] [2021-06-05 13:42:19,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973917914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:19,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997268360] [2021-06-05 13:42:19,794 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) [2021-06-05 13:42:19,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:19,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:19,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:42:19,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:19,862 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 13:42:19,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997268360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:19,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:19,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 13:42:19,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938624940] [2021-06-05 13:42:19,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:19,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:19,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:19,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:19,863 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 13:42:19,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:19,972 INFO L93 Difference]: Finished difference Result 186 states and 367 transitions. [2021-06-05 13:42:19,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:42:19,973 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 13:42:19,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:19,973 INFO L225 Difference]: With dead ends: 186 [2021-06-05 13:42:19,973 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 13:42:19,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:42:19,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 13:42:19,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 84. [2021-06-05 13:42:19,975 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 13:42:19,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 192 transitions. [2021-06-05 13:42:19,976 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 192 transitions. Word has length 16 [2021-06-05 13:42:19,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:19,976 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 192 transitions. [2021-06-05 13:42:19,976 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 13:42:19,976 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 192 transitions. [2021-06-05 13:42:19,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:42:19,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:19,976 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:20,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 13:42:20,189 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:20,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:20,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1305873457, now seen corresponding path program 15 times [2021-06-05 13:42:20,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:20,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817038700] [2021-06-05 13:42:20,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:20,210 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 13:42:20,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:20,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817038700] [2021-06-05 13:42:20,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817038700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:20,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108743098] [2021-06-05 13:42:20,210 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 13:42:20,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 13:42:20,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:20,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:42:20,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:20,282 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 13:42:20,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108743098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:20,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:20,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 13:42:20,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77065672] [2021-06-05 13:42:20,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:20,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:20,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:20,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:20,283 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 13:42:20,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:20,418 INFO L93 Difference]: Finished difference Result 157 states and 310 transitions. [2021-06-05 13:42:20,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:42:20,419 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 13:42:20,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:20,419 INFO L225 Difference]: With dead ends: 157 [2021-06-05 13:42:20,419 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 13:42:20,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:42:20,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 13:42:20,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 84. [2021-06-05 13:42:20,422 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 13:42:20,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 191 transitions. [2021-06-05 13:42:20,422 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 191 transitions. Word has length 16 [2021-06-05 13:42:20,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:20,422 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 191 transitions. [2021-06-05 13:42:20,422 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 13:42:20,422 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 191 transitions. [2021-06-05 13:42:20,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:42:20,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:20,423 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:20,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 13:42:20,639 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:20,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:20,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1339472685, now seen corresponding path program 16 times [2021-06-05 13:42:20,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:20,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500478077] [2021-06-05 13:42:20,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:20,659 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 13:42:20,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:20,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500478077] [2021-06-05 13:42:20,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500478077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:20,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898056614] [2021-06-05 13:42:20,659 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 13:42:20,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:20,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:20,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:42:20,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:20,730 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 13:42:20,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898056614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:20,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:20,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 13:42:20,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245664995] [2021-06-05 13:42:20,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:42:20,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:20,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:42:20,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:20,732 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 13:42:20,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:20,866 INFO L93 Difference]: Finished difference Result 146 states and 304 transitions. [2021-06-05 13:42:20,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:42:20,866 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 13:42:20,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:20,867 INFO L225 Difference]: With dead ends: 146 [2021-06-05 13:42:20,867 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 13:42:20,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 118.5ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:42:20,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 13:42:20,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 94. [2021-06-05 13:42:20,870 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 13:42:20,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 220 transitions. [2021-06-05 13:42:20,870 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 220 transitions. Word has length 16 [2021-06-05 13:42:20,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:20,870 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 220 transitions. [2021-06-05 13:42:20,871 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 13:42:20,871 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 220 transitions. [2021-06-05 13:42:20,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:42:20,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:20,871 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:21,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:21,088 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:21,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:21,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1363701933, now seen corresponding path program 17 times [2021-06-05 13:42:21,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:21,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316011408] [2021-06-05 13:42:21,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:21,110 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 13:42:21,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:21,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316011408] [2021-06-05 13:42:21,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316011408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:21,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848575367] [2021-06-05 13:42:21,111 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 13:42:21,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:42:21,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:21,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:42:21,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:21,175 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 13:42:21,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848575367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:21,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:21,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 13:42:21,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670120183] [2021-06-05 13:42:21,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:21,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:21,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:21,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:21,176 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 13:42:21,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:21,221 INFO L93 Difference]: Finished difference Result 128 states and 284 transitions. [2021-06-05 13:42:21,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:42:21,221 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 13:42:21,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:21,222 INFO L225 Difference]: With dead ends: 128 [2021-06-05 13:42:21,222 INFO L226 Difference]: Without dead ends: 128 [2021-06-05 13:42:21,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:21,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-05 13:42:21,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2021-06-05 13:42:21,225 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 13:42:21,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 220 transitions. [2021-06-05 13:42:21,225 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 220 transitions. Word has length 16 [2021-06-05 13:42:21,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:21,226 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 220 transitions. [2021-06-05 13:42:21,226 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 13:42:21,226 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 220 transitions. [2021-06-05 13:42:21,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:42:21,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:21,227 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:21,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 13:42:21,442 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:21,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:21,443 INFO L82 PathProgramCache]: Analyzing trace with hash -351009401, now seen corresponding path program 18 times [2021-06-05 13:42:21,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:21,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926200578] [2021-06-05 13:42:21,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:21,461 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 13:42:21,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:21,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926200578] [2021-06-05 13:42:21,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926200578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:21,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593682655] [2021-06-05 13:42:21,461 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 13:42:21,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:42:21,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:21,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:42:21,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:21,532 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 13:42:21,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593682655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:21,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:21,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 13:42:21,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834359300] [2021-06-05 13:42:21,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:21,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:21,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:21,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:21,533 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 13:42:21,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:21,647 INFO L93 Difference]: Finished difference Result 128 states and 288 transitions. [2021-06-05 13:42:21,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:21,647 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 13:42:21,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:21,648 INFO L225 Difference]: With dead ends: 128 [2021-06-05 13:42:21,648 INFO L226 Difference]: Without dead ends: 128 [2021-06-05 13:42:21,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:42:21,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-05 13:42:21,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2021-06-05 13:42:21,649 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 13:42:21,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 235 transitions. [2021-06-05 13:42:21,650 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 235 transitions. Word has length 16 [2021-06-05 13:42:21,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:21,650 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 235 transitions. [2021-06-05 13:42:21,650 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 13:42:21,650 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 235 transitions. [2021-06-05 13:42:21,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:42:21,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:21,650 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:21,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 13:42:21,865 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:21,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:21,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1795161359, now seen corresponding path program 19 times [2021-06-05 13:42:21,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:21,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14266752] [2021-06-05 13:42:21,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:21,905 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 13:42:21,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:21,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14266752] [2021-06-05 13:42:21,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14266752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:21,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275227325] [2021-06-05 13:42:21,905 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) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:21,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:42:21,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:21,979 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 13:42:21,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275227325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:21,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:21,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 13:42:21,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248891236] [2021-06-05 13:42:21,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:21,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:21,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:21,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:21,981 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 13:42:22,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:22,069 INFO L93 Difference]: Finished difference Result 175 states and 369 transitions. [2021-06-05 13:42:22,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:42:22,077 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 13:42:22,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:22,078 INFO L225 Difference]: With dead ends: 175 [2021-06-05 13:42:22,078 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 13:42:22,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:42:22,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 13:42:22,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 101. [2021-06-05 13:42:22,080 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 13:42:22,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 246 transitions. [2021-06-05 13:42:22,081 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 246 transitions. Word has length 16 [2021-06-05 13:42:22,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:22,081 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 246 transitions. [2021-06-05 13:42:22,081 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 13:42:22,081 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 246 transitions. [2021-06-05 13:42:22,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:42:22,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:22,081 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:22,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:22,297 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:22,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:22,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1928351131, now seen corresponding path program 20 times [2021-06-05 13:42:22,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:22,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578239900] [2021-06-05 13:42:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:22,323 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 13:42:22,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:22,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578239900] [2021-06-05 13:42:22,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578239900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:22,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928744061] [2021-06-05 13:42:22,324 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 13:42:22,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:22,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:22,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:42:22,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:22,394 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 13:42:22,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928744061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:22,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:22,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 13:42:22,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783700004] [2021-06-05 13:42:22,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:22,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:22,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:22,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:22,395 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 13:42:22,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:22,520 INFO L93 Difference]: Finished difference Result 143 states and 309 transitions. [2021-06-05 13:42:22,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:42:22,520 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 13:42:22,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:22,521 INFO L225 Difference]: With dead ends: 143 [2021-06-05 13:42:22,521 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 13:42:22,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:42:22,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 13:42:22,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2021-06-05 13:42:22,523 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 13:42:22,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 236 transitions. [2021-06-05 13:42:22,523 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 236 transitions. Word has length 16 [2021-06-05 13:42:22,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:22,523 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 236 transitions. [2021-06-05 13:42:22,523 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 13:42:22,523 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 236 transitions. [2021-06-05 13:42:22,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:42:22,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:22,523 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:22,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 13:42:22,724 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:22,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:22,724 INFO L82 PathProgramCache]: Analyzing trace with hash 435044619, now seen corresponding path program 21 times [2021-06-05 13:42:22,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:22,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470509437] [2021-06-05 13:42:22,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:22,743 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 13:42:22,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:22,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470509437] [2021-06-05 13:42:22,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470509437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:22,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150878400] [2021-06-05 13:42:22,744 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 13:42:22,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:42:22,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:22,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:42:22,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:22,806 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 13:42:22,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150878400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:22,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:22,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 13:42:22,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889190195] [2021-06-05 13:42:22,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:22,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:22,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:22,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:22,807 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 13:42:22,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:22,890 INFO L93 Difference]: Finished difference Result 189 states and 398 transitions. [2021-06-05 13:42:22,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:42:22,891 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 13:42:22,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:22,891 INFO L225 Difference]: With dead ends: 189 [2021-06-05 13:42:22,891 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 13:42:22,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:42:22,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 13:42:22,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 106. [2021-06-05 13:42:22,893 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 13:42:22,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 263 transitions. [2021-06-05 13:42:22,894 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 263 transitions. Word has length 16 [2021-06-05 13:42:22,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:22,894 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 263 transitions. [2021-06-05 13:42:22,894 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 13:42:22,894 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 263 transitions. [2021-06-05 13:42:22,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:42:22,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:22,894 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:23,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:23,110 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:23,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:23,110 INFO L82 PathProgramCache]: Analyzing trace with hash -29546485, now seen corresponding path program 22 times [2021-06-05 13:42:23,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:23,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422438826] [2021-06-05 13:42:23,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:23,132 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 13:42:23,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:23,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422438826] [2021-06-05 13:42:23,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422438826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:23,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233852638] [2021-06-05 13:42:23,132 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 13:42:23,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:23,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:23,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:42:23,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:23,196 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 13:42:23,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233852638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:23,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:23,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 13:42:23,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246860751] [2021-06-05 13:42:23,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:23,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:23,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:23,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:23,201 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 13:42:23,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:23,311 INFO L93 Difference]: Finished difference Result 179 states and 382 transitions. [2021-06-05 13:42:23,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:42:23,312 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 13:42:23,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:23,312 INFO L225 Difference]: With dead ends: 179 [2021-06-05 13:42:23,312 INFO L226 Difference]: Without dead ends: 177 [2021-06-05 13:42:23,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:42:23,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-05 13:42:23,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 101. [2021-06-05 13:42:23,314 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 13:42:23,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 244 transitions. [2021-06-05 13:42:23,315 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 244 transitions. Word has length 16 [2021-06-05 13:42:23,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:23,315 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 244 transitions. [2021-06-05 13:42:23,315 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 13:42:23,315 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 244 transitions. [2021-06-05 13:42:23,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:42:23,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:23,315 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:23,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 13:42:23,529 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:23,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:23,529 INFO L82 PathProgramCache]: Analyzing trace with hash -63145713, now seen corresponding path program 23 times [2021-06-05 13:42:23,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:23,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009169730] [2021-06-05 13:42:23,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:23,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:23,551 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 13:42:23,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:23,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009169730] [2021-06-05 13:42:23,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009169730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:23,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716344014] [2021-06-05 13:42:23,552 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 13:42:23,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:23,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:23,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:42:23,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:23,611 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 13:42:23,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716344014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:23,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:23,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 13:42:23,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781676589] [2021-06-05 13:42:23,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:23,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:23,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:23,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:23,612 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 13:42:23,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:23,724 INFO L93 Difference]: Finished difference Result 150 states and 322 transitions. [2021-06-05 13:42:23,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:42:23,725 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 13:42:23,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:23,725 INFO L225 Difference]: With dead ends: 150 [2021-06-05 13:42:23,725 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 13:42:23,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:42:23,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 13:42:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 101. [2021-06-05 13:42:23,727 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 13:42:23,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 242 transitions. [2021-06-05 13:42:23,728 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 242 transitions. Word has length 16 [2021-06-05 13:42:23,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:23,728 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 242 transitions. [2021-06-05 13:42:23,728 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 13:42:23,728 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 242 transitions. [2021-06-05 13:42:23,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:42:23,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:23,729 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:23,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 13:42:23,933 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:23,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:23,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1083715573, now seen corresponding path program 24 times [2021-06-05 13:42:23,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:23,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779986866] [2021-06-05 13:42:23,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:23,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:23,966 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 13:42:23,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:23,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779986866] [2021-06-05 13:42:23,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779986866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:23,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435830189] [2021-06-05 13:42:23,967 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 13:42:23,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 13:42:23,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:23,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:42:23,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:24,029 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 13:42:24,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435830189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:24,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:24,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 13:42:24,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984234609] [2021-06-05 13:42:24,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:42:24,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:24,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:42:24,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:42:24,030 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 13:42:24,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:24,073 INFO L93 Difference]: Finished difference Result 114 states and 266 transitions. [2021-06-05 13:42:24,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:42:24,074 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 13:42:24,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:24,074 INFO L225 Difference]: With dead ends: 114 [2021-06-05 13:42:24,074 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 13:42:24,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:24,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 13:42:24,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2021-06-05 13:42:24,076 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 13:42:24,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 241 transitions. [2021-06-05 13:42:24,076 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 241 transitions. Word has length 16 [2021-06-05 13:42:24,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:24,076 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 241 transitions. [2021-06-05 13:42:24,076 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 13:42:24,076 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 241 transitions. [2021-06-05 13:42:24,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:42:24,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:24,077 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:24,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 13:42:24,292 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:24,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:24,292 INFO L82 PathProgramCache]: Analyzing trace with hash 977688019, now seen corresponding path program 25 times [2021-06-05 13:42:24,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:24,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197059762] [2021-06-05 13:42:24,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:24,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:24,314 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 13:42:24,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:24,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197059762] [2021-06-05 13:42:24,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197059762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:24,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164534566] [2021-06-05 13:42:24,314 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) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:24,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:42:24,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:24,399 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 13:42:24,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164534566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:24,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:24,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 13:42:24,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450565400] [2021-06-05 13:42:24,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:42:24,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:24,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:42:24,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:24,400 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 13:42:24,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:24,509 INFO L93 Difference]: Finished difference Result 167 states and 364 transitions. [2021-06-05 13:42:24,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:42:24,509 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 13:42:24,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:24,510 INFO L225 Difference]: With dead ends: 167 [2021-06-05 13:42:24,510 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 13:42:24,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:42:24,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 13:42:24,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 104. [2021-06-05 13:42:24,512 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 13:42:24,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 251 transitions. [2021-06-05 13:42:24,512 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 251 transitions. Word has length 16 [2021-06-05 13:42:24,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:24,512 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 251 transitions. [2021-06-05 13:42:24,512 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 13:42:24,512 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 251 transitions. [2021-06-05 13:42:24,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:42:24,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:24,513 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:24,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:24,728 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:24,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:24,728 INFO L82 PathProgramCache]: Analyzing trace with hash 935675603, now seen corresponding path program 26 times [2021-06-05 13:42:24,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:24,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972926103] [2021-06-05 13:42:24,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:24,743 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 13:42:24,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:24,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972926103] [2021-06-05 13:42:24,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972926103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:24,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692313708] [2021-06-05 13:42:24,744 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 13:42:24,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:24,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:24,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:42:24,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:24,804 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 13:42:24,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692313708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:24,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:24,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 13:42:24,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307225569] [2021-06-05 13:42:24,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:24,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:24,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:24,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:24,805 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 13:42:24,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:24,878 INFO L93 Difference]: Finished difference Result 217 states and 462 transitions. [2021-06-05 13:42:24,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:42:24,880 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 13:42:24,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:24,881 INFO L225 Difference]: With dead ends: 217 [2021-06-05 13:42:24,881 INFO L226 Difference]: Without dead ends: 217 [2021-06-05 13:42:24,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:42:24,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-05 13:42:24,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 115. [2021-06-05 13:42:24,884 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 13:42:24,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2021-06-05 13:42:24,884 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 16 [2021-06-05 13:42:24,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:24,884 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2021-06-05 13:42:24,884 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 13:42:24,885 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2021-06-05 13:42:24,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:42:24,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:24,885 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:25,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 13:42:25,100 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:25,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:25,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1507130409, now seen corresponding path program 27 times [2021-06-05 13:42:25,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:25,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090173730] [2021-06-05 13:42:25,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:25,116 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 13:42:25,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:25,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090173730] [2021-06-05 13:42:25,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090173730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:25,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076445343] [2021-06-05 13:42:25,116 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 13:42:25,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 13:42:25,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:25,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:42:25,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:25,178 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 13:42:25,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076445343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:25,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:25,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 13:42:25,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306744625] [2021-06-05 13:42:25,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:42:25,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:25,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:42:25,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:42:25,179 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 13:42:25,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:25,330 INFO L93 Difference]: Finished difference Result 201 states and 430 transitions. [2021-06-05 13:42:25,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:42:25,330 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 13:42:25,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:25,331 INFO L225 Difference]: With dead ends: 201 [2021-06-05 13:42:25,331 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 13:42:25,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:42:25,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 13:42:25,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 109. [2021-06-05 13:42:25,333 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 13:42:25,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 265 transitions. [2021-06-05 13:42:25,334 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 265 transitions. Word has length 16 [2021-06-05 13:42:25,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:25,334 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 265 transitions. [2021-06-05 13:42:25,334 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 13:42:25,334 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 265 transitions. [2021-06-05 13:42:25,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:42:25,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:25,334 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:25,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:25,547 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:25,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:25,547 INFO L82 PathProgramCache]: Analyzing trace with hash 2042360211, now seen corresponding path program 28 times [2021-06-05 13:42:25,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:25,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210545349] [2021-06-05 13:42:25,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:25,571 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 13:42:25,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:25,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210545349] [2021-06-05 13:42:25,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210545349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:25,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418013644] [2021-06-05 13:42:25,571 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 13:42:25,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:25,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:25,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:42:25,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:25,649 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 13:42:25,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418013644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:25,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:25,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 13:42:25,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366454778] [2021-06-05 13:42:25,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:42:25,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:25,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:42:25,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:25,650 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 13:42:25,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:25,794 INFO L93 Difference]: Finished difference Result 183 states and 400 transitions. [2021-06-05 13:42:25,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:42:25,795 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 13:42:25,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:25,795 INFO L225 Difference]: With dead ends: 183 [2021-06-05 13:42:25,795 INFO L226 Difference]: Without dead ends: 177 [2021-06-05 13:42:25,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:42:25,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-05 13:42:25,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 122. [2021-06-05 13:42:25,797 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 13:42:25,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 302 transitions. [2021-06-05 13:42:25,798 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 302 transitions. Word has length 16 [2021-06-05 13:42:25,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:25,798 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 302 transitions. [2021-06-05 13:42:25,798 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 13:42:25,798 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 302 transitions. [2021-06-05 13:42:25,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:42:25,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:25,798 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:26,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:26,014 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:26,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:26,014 INFO L82 PathProgramCache]: Analyzing trace with hash -601783285, now seen corresponding path program 29 times [2021-06-05 13:42:26,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:26,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634184081] [2021-06-05 13:42:26,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:26,089 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 13:42:26,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:26,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634184081] [2021-06-05 13:42:26,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634184081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:26,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672595185] [2021-06-05 13:42:26,090 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 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 13:42:26,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:26,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:26,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:26,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:26,190 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 13:42:26,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672595185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:26,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:26,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 13:42:26,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7379090] [2021-06-05 13:42:26,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:42:26,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:26,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:42:26,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:26,192 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 13:42:26,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:26,329 INFO L93 Difference]: Finished difference Result 223 states and 473 transitions. [2021-06-05 13:42:26,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:42:26,329 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 13:42:26,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:26,330 INFO L225 Difference]: With dead ends: 223 [2021-06-05 13:42:26,330 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 13:42:26,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 135.6ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:42:26,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 13:42:26,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2021-06-05 13:42:26,333 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 13:42:26,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 349 transitions. [2021-06-05 13:42:26,333 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 349 transitions. Word has length 17 [2021-06-05 13:42:26,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:26,333 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 349 transitions. [2021-06-05 13:42:26,333 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 13:42:26,333 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 349 transitions. [2021-06-05 13:42:26,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:42:26,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:26,333 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:26,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 13:42:26,537 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:26,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:26,537 INFO L82 PathProgramCache]: Analyzing trace with hash 838349055, now seen corresponding path program 30 times [2021-06-05 13:42:26,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:26,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094754674] [2021-06-05 13:42:26,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:26,619 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 13:42:26,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:26,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094754674] [2021-06-05 13:42:26,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094754674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:26,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742973054] [2021-06-05 13:42:26,619 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 13:42:26,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:42:26,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:26,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:26,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:26,713 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 13:42:26,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742973054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:26,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:26,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 13:42:26,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352733405] [2021-06-05 13:42:26,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:42:26,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:26,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:42:26,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:26,715 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 13:42:26,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:26,813 INFO L93 Difference]: Finished difference Result 253 states and 530 transitions. [2021-06-05 13:42:26,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:42:26,813 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 13:42:26,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:26,814 INFO L225 Difference]: With dead ends: 253 [2021-06-05 13:42:26,814 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 13:42:26,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:42:26,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 13:42:26,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 149. [2021-06-05 13:42:26,817 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 13:42:26,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 374 transitions. [2021-06-05 13:42:26,817 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 374 transitions. Word has length 17 [2021-06-05 13:42:26,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:26,817 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 374 transitions. [2021-06-05 13:42:26,817 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 13:42:26,817 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 374 transitions. [2021-06-05 13:42:26,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:42:26,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:26,818 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:27,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 13:42:27,018 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:27,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:27,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1841915517, now seen corresponding path program 31 times [2021-06-05 13:42:27,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:27,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668200197] [2021-06-05 13:42:27,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:27,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:27,096 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 13:42:27,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:27,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668200197] [2021-06-05 13:42:27,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668200197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:27,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162469006] [2021-06-05 13:42:27,097 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) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:27,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:27,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:27,176 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 13:42:27,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162469006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:27,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:27,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 13:42:27,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053480221] [2021-06-05 13:42:27,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:42:27,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:27,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:42:27,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:27,177 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 13:42:27,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:27,309 INFO L93 Difference]: Finished difference Result 239 states and 510 transitions. [2021-06-05 13:42:27,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:27,309 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 13:42:27,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:27,310 INFO L225 Difference]: With dead ends: 239 [2021-06-05 13:42:27,310 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 13:42:27,310 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 13:42:27,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 13:42:27,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 148. [2021-06-05 13:42:27,313 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 13:42:27,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 371 transitions. [2021-06-05 13:42:27,313 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 371 transitions. Word has length 17 [2021-06-05 13:42:27,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:27,313 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 371 transitions. [2021-06-05 13:42:27,313 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 13:42:27,313 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 371 transitions. [2021-06-05 13:42:27,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:42:27,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:27,313 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:27,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 13:42:27,529 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:27,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:27,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1409803861, now seen corresponding path program 32 times [2021-06-05 13:42:27,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:27,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895656195] [2021-06-05 13:42:27,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:27,600 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 13:42:27,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:27,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895656195] [2021-06-05 13:42:27,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895656195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:27,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557742364] [2021-06-05 13:42:27,600 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 13:42:27,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:27,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:27,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:27,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:27,740 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 13:42:27,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557742364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:27,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:27,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 13:42:27,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028241471] [2021-06-05 13:42:27,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:42:27,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:27,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:42:27,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:27,741 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 13:42:27,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:27,852 INFO L93 Difference]: Finished difference Result 224 states and 484 transitions. [2021-06-05 13:42:27,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:27,853 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 13:42:27,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:27,855 INFO L225 Difference]: With dead ends: 224 [2021-06-05 13:42:27,855 INFO L226 Difference]: Without dead ends: 217 [2021-06-05 13:42:27,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:42:27,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-05 13:42:27,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 148. [2021-06-05 13:42:27,858 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 13:42:27,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 371 transitions. [2021-06-05 13:42:27,858 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 371 transitions. Word has length 17 [2021-06-05 13:42:27,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:27,858 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 371 transitions. [2021-06-05 13:42:27,858 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 13:42:27,858 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 371 transitions. [2021-06-05 13:42:27,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:42:27,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:27,859 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:28,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:28,074 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:28,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:28,075 INFO L82 PathProgramCache]: Analyzing trace with hash 437462331, now seen corresponding path program 33 times [2021-06-05 13:42:28,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:28,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581526388] [2021-06-05 13:42:28,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:28,133 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 13:42:28,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:28,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581526388] [2021-06-05 13:42:28,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581526388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:28,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321051677] [2021-06-05 13:42:28,133 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 13:42:28,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:42:28,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:28,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:28,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:28,234 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 13:42:28,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321051677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:28,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:28,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 13:42:28,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470733744] [2021-06-05 13:42:28,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:42:28,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:28,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:42:28,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:28,235 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 13:42:28,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:28,317 INFO L93 Difference]: Finished difference Result 218 states and 492 transitions. [2021-06-05 13:42:28,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:42:28,317 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 13:42:28,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:28,318 INFO L225 Difference]: With dead ends: 218 [2021-06-05 13:42:28,318 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 13:42:28,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:28,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 13:42:28,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 157. [2021-06-05 13:42:28,321 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 13:42:28,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 398 transitions. [2021-06-05 13:42:28,321 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 398 transitions. Word has length 17 [2021-06-05 13:42:28,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:28,321 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 398 transitions. [2021-06-05 13:42:28,321 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 13:42:28,321 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 398 transitions. [2021-06-05 13:42:28,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:42:28,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:28,322 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:28,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 13:42:28,537 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:28,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:28,537 INFO L82 PathProgramCache]: Analyzing trace with hash 2052165055, now seen corresponding path program 34 times [2021-06-05 13:42:28,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:28,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136840672] [2021-06-05 13:42:28,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:28,596 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 13:42:28,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:28,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136840672] [2021-06-05 13:42:28,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136840672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:28,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610666288] [2021-06-05 13:42:28,597 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 13:42:28,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:28,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:28,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:28,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:28,688 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 13:42:28,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610666288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:28,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:28,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 13:42:28,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586626491] [2021-06-05 13:42:28,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:42:28,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:28,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:42:28,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:28,689 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 13:42:28,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:28,775 INFO L93 Difference]: Finished difference Result 220 states and 491 transitions. [2021-06-05 13:42:28,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:42:28,775 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 13:42:28,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:28,776 INFO L225 Difference]: With dead ends: 220 [2021-06-05 13:42:28,776 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 13:42:28,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:42:28,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 13:42:28,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 156. [2021-06-05 13:42:28,778 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 13:42:28,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 393 transitions. [2021-06-05 13:42:28,779 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 393 transitions. Word has length 17 [2021-06-05 13:42:28,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:28,779 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 393 transitions. [2021-06-05 13:42:28,779 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 13:42:28,779 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 393 transitions. [2021-06-05 13:42:28,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:42:28,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:28,779 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:28,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 13:42:28,993 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:28,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:28,993 INFO L82 PathProgramCache]: Analyzing trace with hash -27128773, now seen corresponding path program 35 times [2021-06-05 13:42:28,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:28,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074752720] [2021-06-05 13:42:28,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:29,040 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 13:42:29,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:29,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074752720] [2021-06-05 13:42:29,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074752720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:29,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539035780] [2021-06-05 13:42:29,041 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 13:42:29,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:42:29,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:29,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:29,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:29,134 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 13:42:29,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539035780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:29,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:29,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 13:42:29,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219483942] [2021-06-05 13:42:29,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:42:29,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:29,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:42:29,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:29,135 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 13:42:29,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:29,229 INFO L93 Difference]: Finished difference Result 203 states and 463 transitions. [2021-06-05 13:42:29,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:42:29,229 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 13:42:29,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:29,230 INFO L225 Difference]: With dead ends: 203 [2021-06-05 13:42:29,230 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 13:42:29,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:29,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 13:42:29,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 156. [2021-06-05 13:42:29,232 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 13:42:29,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 393 transitions. [2021-06-05 13:42:29,233 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 393 transitions. Word has length 17 [2021-06-05 13:42:29,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:29,233 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 393 transitions. [2021-06-05 13:42:29,233 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 13:42:29,233 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 393 transitions. [2021-06-05 13:42:29,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:42:29,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:29,233 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:29,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:29,449 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:29,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:29,449 INFO L82 PathProgramCache]: Analyzing trace with hash 894875775, now seen corresponding path program 36 times [2021-06-05 13:42:29,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:29,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411075450] [2021-06-05 13:42:29,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:29,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:29,527 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 13:42:29,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:29,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411075450] [2021-06-05 13:42:29,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411075450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:29,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591176120] [2021-06-05 13:42:29,527 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 13:42:29,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:42:29,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:29,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:29,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:29,640 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 13:42:29,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591176120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:29,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:29,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 13:42:29,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907718705] [2021-06-05 13:42:29,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:42:29,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:29,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:42:29,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:29,641 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 13:42:29,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:29,773 INFO L93 Difference]: Finished difference Result 276 states and 609 transitions. [2021-06-05 13:42:29,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:29,773 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 13:42:29,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:29,774 INFO L225 Difference]: With dead ends: 276 [2021-06-05 13:42:29,774 INFO L226 Difference]: Without dead ends: 259 [2021-06-05 13:42:29,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 141.7ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:42:29,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-06-05 13:42:29,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 173. [2021-06-05 13:42:29,777 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 13:42:29,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 448 transitions. [2021-06-05 13:42:29,777 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 448 transitions. Word has length 17 [2021-06-05 13:42:29,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:29,777 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 448 transitions. [2021-06-05 13:42:29,777 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 13:42:29,777 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 448 transitions. [2021-06-05 13:42:29,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:42:29,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:29,778 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:29,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:29,993 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:29,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:29,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1785388797, now seen corresponding path program 37 times [2021-06-05 13:42:29,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:29,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48093351] [2021-06-05 13:42:29,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:30,060 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 13:42:30,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:30,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48093351] [2021-06-05 13:42:30,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48093351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:30,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773734138] [2021-06-05 13:42:30,060 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 13:42:30,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:30,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:30,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:30,141 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 13:42:30,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773734138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:30,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:30,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 13:42:30,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145602671] [2021-06-05 13:42:30,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:42:30,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:30,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:42:30,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:30,142 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 13:42:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:30,260 INFO L93 Difference]: Finished difference Result 277 states and 604 transitions. [2021-06-05 13:42:30,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:30,260 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 13:42:30,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:30,261 INFO L225 Difference]: With dead ends: 277 [2021-06-05 13:42:30,261 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 13:42:30,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:42:30,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 13:42:30,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 170. [2021-06-05 13:42:30,264 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 13:42:30,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 435 transitions. [2021-06-05 13:42:30,264 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 435 transitions. Word has length 17 [2021-06-05 13:42:30,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:30,264 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 435 transitions. [2021-06-05 13:42:30,264 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 13:42:30,264 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 435 transitions. [2021-06-05 13:42:30,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:42:30,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:30,265 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:30,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:30,480 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:30,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:30,481 INFO L82 PathProgramCache]: Analyzing trace with hash 430284671, now seen corresponding path program 38 times [2021-06-05 13:42:30,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:30,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780569575] [2021-06-05 13:42:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:30,534 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 13:42:30,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:30,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780569575] [2021-06-05 13:42:30,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780569575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:30,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405138299] [2021-06-05 13:42:30,534 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 13:42:30,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:30,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:30,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:30,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:30,612 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 13:42:30,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405138299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:30,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:30,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 13:42:30,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187012726] [2021-06-05 13:42:30,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:42:30,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:30,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:42:30,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:30,613 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 13:42:30,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:30,781 INFO L93 Difference]: Finished difference Result 262 states and 576 transitions. [2021-06-05 13:42:30,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:42:30,782 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 13:42:30,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:30,782 INFO L225 Difference]: With dead ends: 262 [2021-06-05 13:42:30,782 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 13:42:30,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:42:30,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 13:42:30,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 169. [2021-06-05 13:42:30,785 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 13:42:30,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 433 transitions. [2021-06-05 13:42:30,785 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 433 transitions. Word has length 17 [2021-06-05 13:42:30,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:30,785 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 433 transitions. [2021-06-05 13:42:30,785 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 13:42:30,785 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 433 transitions. [2021-06-05 13:42:30,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:42:30,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:30,786 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:30,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:30,989 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:30,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:30,989 INFO L82 PathProgramCache]: Analyzing trace with hash 396685443, now seen corresponding path program 39 times [2021-06-05 13:42:30,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:30,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973381482] [2021-06-05 13:42:30,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:31,043 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 13:42:31,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:31,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973381482] [2021-06-05 13:42:31,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973381482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:31,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201323342] [2021-06-05 13:42:31,043 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 13:42:31,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 13:42:31,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:31,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:31,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:31,132 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 13:42:31,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201323342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:31,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:31,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 13:42:31,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193614359] [2021-06-05 13:42:31,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:42:31,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:31,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:42:31,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:31,133 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 13:42:31,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:31,262 INFO L93 Difference]: Finished difference Result 233 states and 528 transitions. [2021-06-05 13:42:31,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:42:31,262 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 13:42:31,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:31,263 INFO L225 Difference]: With dead ends: 233 [2021-06-05 13:42:31,263 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 13:42:31,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 129.8ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:42:31,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 13:42:31,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 175. [2021-06-05 13:42:31,266 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 13:42:31,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 442 transitions. [2021-06-05 13:42:31,266 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 442 transitions. Word has length 17 [2021-06-05 13:42:31,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:31,266 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 442 transitions. [2021-06-05 13:42:31,266 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 13:42:31,266 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 442 transitions. [2021-06-05 13:42:31,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:42:31,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:31,267 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:31,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:31,481 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:31,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:31,481 INFO L82 PathProgramCache]: Analyzing trace with hash 852863359, now seen corresponding path program 40 times [2021-06-05 13:42:31,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:31,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136190079] [2021-06-05 13:42:31,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:31,545 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 13:42:31,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:31,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136190079] [2021-06-05 13:42:31,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136190079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:31,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116440309] [2021-06-05 13:42:31,546 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 13:42:31,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:31,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:31,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:31,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:31,638 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 13:42:31,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116440309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:31,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:31,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 13:42:31,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474734251] [2021-06-05 13:42:31,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:42:31,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:31,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:42:31,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:31,639 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 13:42:31,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:31,742 INFO L93 Difference]: Finished difference Result 259 states and 585 transitions. [2021-06-05 13:42:31,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:42:31,743 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 13:42:31,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:31,743 INFO L225 Difference]: With dead ends: 259 [2021-06-05 13:42:31,743 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 13:42:31,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 129.5ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:42:31,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 13:42:31,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 182. [2021-06-05 13:42:31,746 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 13:42:31,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 465 transitions. [2021-06-05 13:42:31,746 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 465 transitions. Word has length 17 [2021-06-05 13:42:31,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:31,747 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 465 transitions. [2021-06-05 13:42:31,747 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 13:42:31,747 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 465 transitions. [2021-06-05 13:42:31,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:42:31,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:31,747 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:31,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:31,961 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:31,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:31,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1827401213, now seen corresponding path program 41 times [2021-06-05 13:42:31,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:31,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654780353] [2021-06-05 13:42:31,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:32,023 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 13:42:32,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:32,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654780353] [2021-06-05 13:42:32,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654780353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:32,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039703769] [2021-06-05 13:42:32,023 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) [2021-06-05 13:42:32,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:42:32,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:32,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:32,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:32,111 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 13:42:32,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039703769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:32,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:32,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 13:42:32,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044230514] [2021-06-05 13:42:32,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:42:32,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:32,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:42:32,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:32,113 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 13:42:32,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:32,199 INFO L93 Difference]: Finished difference Result 247 states and 565 transitions. [2021-06-05 13:42:32,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:42:32,200 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 13:42:32,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:32,200 INFO L225 Difference]: With dead ends: 247 [2021-06-05 13:42:32,200 INFO L226 Difference]: Without dead ends: 240 [2021-06-05 13:42:32,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:32,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-05 13:42:32,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 183. [2021-06-05 13:42:32,203 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 13:42:32,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 464 transitions. [2021-06-05 13:42:32,203 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 464 transitions. Word has length 17 [2021-06-05 13:42:32,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:32,203 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 464 transitions. [2021-06-05 13:42:32,203 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 13:42:32,203 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 464 transitions. [2021-06-05 13:42:32,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:42:32,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:32,204 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:32,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:32,419 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:32,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:32,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1424318165, now seen corresponding path program 42 times [2021-06-05 13:42:32,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:32,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572780701] [2021-06-05 13:42:32,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:32,491 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 13:42:32,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:32,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572780701] [2021-06-05 13:42:32,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572780701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:32,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765194758] [2021-06-05 13:42:32,491 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 13:42:32,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:42:32,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:32,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:42:32,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:32,582 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 13:42:32,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765194758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:32,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:32,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 13:42:32,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458103757] [2021-06-05 13:42:32,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:42:32,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:32,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:42:32,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:42:32,583 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 13:42:32,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:32,683 INFO L93 Difference]: Finished difference Result 231 states and 537 transitions. [2021-06-05 13:42:32,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:42:32,684 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 13:42:32,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:32,684 INFO L225 Difference]: With dead ends: 231 [2021-06-05 13:42:32,684 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 13:42:32,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:32,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 13:42:32,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 182. [2021-06-05 13:42:32,687 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 13:42:32,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 461 transitions. [2021-06-05 13:42:32,687 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 461 transitions. Word has length 17 [2021-06-05 13:42:32,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:32,687 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 461 transitions. [2021-06-05 13:42:32,687 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 13:42:32,687 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 461 transitions. [2021-06-05 13:42:32,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:32,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:32,688 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:32,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:32,901 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:32,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:32,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1448785397, now seen corresponding path program 43 times [2021-06-05 13:42:32,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:32,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982867465] [2021-06-05 13:42:32,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:32,934 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 13:42:32,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:32,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982867465] [2021-06-05 13:42:32,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982867465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:32,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734926077] [2021-06-05 13:42:32,934 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 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 13:42:32,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:32,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:32,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:33,011 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 13:42:33,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734926077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:33,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:33,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 13:42:33,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207076913] [2021-06-05 13:42:33,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:42:33,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:33,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:42:33,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:33,011 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 13:42:33,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:33,091 INFO L93 Difference]: Finished difference Result 295 states and 722 transitions. [2021-06-05 13:42:33,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:42:33,091 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 13:42:33,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:33,092 INFO L225 Difference]: With dead ends: 295 [2021-06-05 13:42:33,092 INFO L226 Difference]: Without dead ends: 281 [2021-06-05 13:42:33,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:42:33,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-05 13:42:33,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 177. [2021-06-05 13:42:33,094 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 13:42:33,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 451 transitions. [2021-06-05 13:42:33,095 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 451 transitions. Word has length 18 [2021-06-05 13:42:33,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:33,095 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 451 transitions. [2021-06-05 13:42:33,095 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 13:42:33,095 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 451 transitions. [2021-06-05 13:42:33,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:33,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:33,095 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:33,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 13:42:33,305 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:33,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:33,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1017532901, now seen corresponding path program 44 times [2021-06-05 13:42:33,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:33,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887973555] [2021-06-05 13:42:33,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:33,334 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 13:42:33,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:33,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887973555] [2021-06-05 13:42:33,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887973555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:33,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982003807] [2021-06-05 13:42:33,334 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) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:33,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:33,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:33,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:33,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:33,427 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 13:42:33,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982003807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:33,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:33,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 13:42:33,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113162462] [2021-06-05 13:42:33,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:42:33,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:33,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:42:33,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:33,428 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 13:42:33,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:33,497 INFO L93 Difference]: Finished difference Result 302 states and 747 transitions. [2021-06-05 13:42:33,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:42:33,498 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 13:42:33,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:33,499 INFO L225 Difference]: With dead ends: 302 [2021-06-05 13:42:33,499 INFO L226 Difference]: Without dead ends: 302 [2021-06-05 13:42:33,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:42:33,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-06-05 13:42:33,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 183. [2021-06-05 13:42:33,501 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 13:42:33,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 469 transitions. [2021-06-05 13:42:33,502 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 469 transitions. Word has length 18 [2021-06-05 13:42:33,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:33,502 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 469 transitions. [2021-06-05 13:42:33,502 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 13:42:33,502 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 469 transitions. [2021-06-05 13:42:33,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:33,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:33,502 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:33,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:33,718 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:33,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:33,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1381829455, now seen corresponding path program 45 times [2021-06-05 13:42:33,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:33,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136202283] [2021-06-05 13:42:33,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:33,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:33,753 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 13:42:33,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:33,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136202283] [2021-06-05 13:42:33,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136202283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:33,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490520173] [2021-06-05 13:42:33,754 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) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:33,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:42:33,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:33,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:33,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:33,826 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 13:42:33,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490520173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:33,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:33,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 13:42:33,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969685185] [2021-06-05 13:42:33,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:33,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:33,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:33,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:33,827 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 13:42:34,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:34,016 INFO L93 Difference]: Finished difference Result 476 states and 1093 transitions. [2021-06-05 13:42:34,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:42:34,017 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 13:42:34,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:34,018 INFO L225 Difference]: With dead ends: 476 [2021-06-05 13:42:34,018 INFO L226 Difference]: Without dead ends: 474 [2021-06-05 13:42:34,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:42:34,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-06-05 13:42:34,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 222. [2021-06-05 13:42:34,022 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 13:42:34,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 607 transitions. [2021-06-05 13:42:34,022 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 607 transitions. Word has length 18 [2021-06-05 13:42:34,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:34,022 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 607 transitions. [2021-06-05 13:42:34,022 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 13:42:34,022 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 607 transitions. [2021-06-05 13:42:34,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:34,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:34,023 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:34,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 13:42:34,237 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:34,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:34,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1953284261, now seen corresponding path program 46 times [2021-06-05 13:42:34,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:34,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406080885] [2021-06-05 13:42:34,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:34,260 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 13:42:34,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:34,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406080885] [2021-06-05 13:42:34,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406080885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:34,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668864122] [2021-06-05 13:42:34,261 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 13:42:34,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:34,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:34,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:34,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:34,350 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 13:42:34,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668864122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:34,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:34,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 13:42:34,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041427903] [2021-06-05 13:42:34,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:34,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:34,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:34,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:34,351 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 13:42:34,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:34,556 INFO L93 Difference]: Finished difference Result 476 states and 1089 transitions. [2021-06-05 13:42:34,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:42:34,556 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 13:42:34,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:34,557 INFO L225 Difference]: With dead ends: 476 [2021-06-05 13:42:34,557 INFO L226 Difference]: Without dead ends: 470 [2021-06-05 13:42:34,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 163.7ms TimeCoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:42:34,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-06-05 13:42:34,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 205. [2021-06-05 13:42:34,561 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 13:42:34,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 543 transitions. [2021-06-05 13:42:34,561 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 543 transitions. Word has length 18 [2021-06-05 13:42:34,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:34,561 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 543 transitions. [2021-06-05 13:42:34,561 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 13:42:34,561 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 543 transitions. [2021-06-05 13:42:34,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:34,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:34,562 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:34,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 13:42:34,777 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:34,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:34,777 INFO L82 PathProgramCache]: Analyzing trace with hash 21712715, now seen corresponding path program 47 times [2021-06-05 13:42:34,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:34,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556449878] [2021-06-05 13:42:34,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:34,801 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 13:42:34,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:34,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556449878] [2021-06-05 13:42:34,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556449878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:34,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410820237] [2021-06-05 13:42:34,802 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 13:42:34,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:42:34,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:34,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:34,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:34,872 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 13:42:34,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410820237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:34,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:34,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 13:42:34,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477063113] [2021-06-05 13:42:34,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:34,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:34,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:34,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:34,873 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 13:42:35,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:35,058 INFO L93 Difference]: Finished difference Result 423 states and 962 transitions. [2021-06-05 13:42:35,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:42:35,062 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 13:42:35,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:35,064 INFO L225 Difference]: With dead ends: 423 [2021-06-05 13:42:35,064 INFO L226 Difference]: Without dead ends: 423 [2021-06-05 13:42:35,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 142.6ms TimeCoverageRelationStatistics Valid=259, Invalid=443, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:42:35,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-05 13:42:35,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 211. [2021-06-05 13:42:35,067 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 13:42:35,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 565 transitions. [2021-06-05 13:42:35,067 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 565 transitions. Word has length 18 [2021-06-05 13:42:35,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:35,067 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 565 transitions. [2021-06-05 13:42:35,067 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 13:42:35,067 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 565 transitions. [2021-06-05 13:42:35,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:35,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:35,068 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:35,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 13:42:35,283 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:35,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:35,283 INFO L82 PathProgramCache]: Analyzing trace with hash -442878389, now seen corresponding path program 48 times [2021-06-05 13:42:35,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:35,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580416379] [2021-06-05 13:42:35,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:35,318 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 13:42:35,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:35,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580416379] [2021-06-05 13:42:35,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580416379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:35,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473918947] [2021-06-05 13:42:35,318 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 13:42:35,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:42:35,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:35,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:35,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:35,387 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 13:42:35,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473918947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:35,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:35,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 13:42:35,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049608] [2021-06-05 13:42:35,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:35,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:35,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:35,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:35,388 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 13:42:35,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:35,627 INFO L93 Difference]: Finished difference Result 326 states and 774 transitions. [2021-06-05 13:42:35,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:42:35,628 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 13:42:35,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:35,629 INFO L225 Difference]: With dead ends: 326 [2021-06-05 13:42:35,629 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 13:42:35,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:42:35,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 13:42:35,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 205. [2021-06-05 13:42:35,636 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 13:42:35,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 544 transitions. [2021-06-05 13:42:35,653 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 544 transitions. Word has length 18 [2021-06-05 13:42:35,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:35,653 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 544 transitions. [2021-06-05 13:42:35,654 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 13:42:35,654 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 544 transitions. [2021-06-05 13:42:35,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:35,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:35,654 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:35,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 13:42:35,859 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:35,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:35,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1806453233, now seen corresponding path program 49 times [2021-06-05 13:42:35,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:35,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246525584] [2021-06-05 13:42:35,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:35,920 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 13:42:35,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:35,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246525584] [2021-06-05 13:42:35,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246525584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:35,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896008228] [2021-06-05 13:42:35,921 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:42:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:35,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:35,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:36,052 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 13:42:36,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896008228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:36,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:36,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 13:42:36,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290532757] [2021-06-05 13:42:36,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:36,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:36,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:36,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:36,054 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 13:42:36,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:36,341 INFO L93 Difference]: Finished difference Result 460 states and 1057 transitions. [2021-06-05 13:42:36,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:42:36,341 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 13:42:36,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:36,342 INFO L225 Difference]: With dead ends: 460 [2021-06-05 13:42:36,342 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 13:42:36,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 244.7ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:42:36,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 13:42:36,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 215. [2021-06-05 13:42:36,346 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 13:42:36,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 574 transitions. [2021-06-05 13:42:36,346 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 574 transitions. Word has length 18 [2021-06-05 13:42:36,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:36,346 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 574 transitions. [2021-06-05 13:42:36,346 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 13:42:36,346 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 574 transitions. [2021-06-05 13:42:36,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:36,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:36,347 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:36,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 13:42:36,562 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:36,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:36,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1900768741, now seen corresponding path program 50 times [2021-06-05 13:42:36,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:36,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926722603] [2021-06-05 13:42:36,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:36,597 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 13:42:36,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:36,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926722603] [2021-06-05 13:42:36,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926722603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:36,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197935768] [2021-06-05 13:42:36,597 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 13:42:36,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:36,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:36,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:36,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:36,682 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 13:42:36,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197935768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:36,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:36,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 13:42:36,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779615783] [2021-06-05 13:42:36,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:36,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:36,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:36,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:36,685 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 13:42:36,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:36,909 INFO L93 Difference]: Finished difference Result 374 states and 891 transitions. [2021-06-05 13:42:36,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:42:36,909 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 13:42:36,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:36,910 INFO L225 Difference]: With dead ends: 374 [2021-06-05 13:42:36,910 INFO L226 Difference]: Without dead ends: 365 [2021-06-05 13:42:36,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:42:36,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-05 13:42:36,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 215. [2021-06-05 13:42:36,914 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 13:42:36,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 572 transitions. [2021-06-05 13:42:36,915 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 572 transitions. Word has length 18 [2021-06-05 13:42:36,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:36,915 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 572 transitions. [2021-06-05 13:42:36,915 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 13:42:36,915 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 572 transitions. [2021-06-05 13:42:36,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:36,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:36,916 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:37,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 13:42:37,147 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:37,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:37,148 INFO L82 PathProgramCache]: Analyzing trace with hash 479126159, now seen corresponding path program 51 times [2021-06-05 13:42:37,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:37,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388247762] [2021-06-05 13:42:37,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:37,175 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 13:42:37,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:37,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388247762] [2021-06-05 13:42:37,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388247762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:37,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318995222] [2021-06-05 13:42:37,175 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 13:42:37,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:42:37,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:37,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:37,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:37,290 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 13:42:37,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318995222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:37,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:37,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 13:42:37,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530334960] [2021-06-05 13:42:37,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:37,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:37,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:37,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:37,291 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 13:42:37,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:37,464 INFO L93 Difference]: Finished difference Result 439 states and 1014 transitions. [2021-06-05 13:42:37,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:42:37,465 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 13:42:37,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:37,466 INFO L225 Difference]: With dead ends: 439 [2021-06-05 13:42:37,466 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 13:42:37,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 135.6ms TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:42:37,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 13:42:37,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 233. [2021-06-05 13:42:37,469 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 13:42:37,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 624 transitions. [2021-06-05 13:42:37,469 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 624 transitions. Word has length 18 [2021-06-05 13:42:37,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:37,470 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 624 transitions. [2021-06-05 13:42:37,470 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 13:42:37,470 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 624 transitions. [2021-06-05 13:42:37,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:37,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:37,470 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:37,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 13:42:37,671 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:37,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:37,671 INFO L82 PathProgramCache]: Analyzing trace with hash 14535055, now seen corresponding path program 52 times [2021-06-05 13:42:37,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:37,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097705574] [2021-06-05 13:42:37,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:37,695 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 13:42:37,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:37,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097705574] [2021-06-05 13:42:37,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097705574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:37,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938878339] [2021-06-05 13:42:37,695 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 13:42:37,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:37,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:37,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:37,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:37,771 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 13:42:37,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938878339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:37,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:37,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 13:42:37,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366051095] [2021-06-05 13:42:37,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:37,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:37,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:37,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:37,772 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 13:42:38,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:38,009 INFO L93 Difference]: Finished difference Result 389 states and 889 transitions. [2021-06-05 13:42:38,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:42:38,010 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 13:42:38,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:38,011 INFO L225 Difference]: With dead ends: 389 [2021-06-05 13:42:38,011 INFO L226 Difference]: Without dead ends: 383 [2021-06-05 13:42:38,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 206.6ms TimeCoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:42:38,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-05 13:42:38,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 216. [2021-06-05 13:42:38,025 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 13:42:38,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 570 transitions. [2021-06-05 13:42:38,026 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 570 transitions. Word has length 18 [2021-06-05 13:42:38,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:38,026 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 570 transitions. [2021-06-05 13:42:38,026 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 13:42:38,026 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 570 transitions. [2021-06-05 13:42:38,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:38,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:38,026 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:38,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:38,241 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:38,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:38,241 INFO L82 PathProgramCache]: Analyzing trace with hash -19064173, now seen corresponding path program 53 times [2021-06-05 13:42:38,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:38,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816685127] [2021-06-05 13:42:38,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:38,264 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 13:42:38,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:38,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816685127] [2021-06-05 13:42:38,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816685127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:38,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329877012] [2021-06-05 13:42:38,265 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 13:42:38,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:42:38,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:38,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:38,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:38,347 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 13:42:38,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329877012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:38,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:38,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 13:42:38,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827736319] [2021-06-05 13:42:38,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:38,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:38,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:38,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:38,348 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 13:42:38,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:38,589 INFO L93 Difference]: Finished difference Result 347 states and 818 transitions. [2021-06-05 13:42:38,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:42:38,589 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 13:42:38,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:38,590 INFO L225 Difference]: With dead ends: 347 [2021-06-05 13:42:38,590 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 13:42:38,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 211.0ms TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:42:38,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 13:42:38,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 227. [2021-06-05 13:42:38,593 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 13:42:38,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 601 transitions. [2021-06-05 13:42:38,594 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 601 transitions. Word has length 18 [2021-06-05 13:42:38,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:38,594 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 601 transitions. [2021-06-05 13:42:38,594 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 13:42:38,594 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 601 transitions. [2021-06-05 13:42:38,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:38,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:38,594 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:38,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 13:42:38,809 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:38,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:38,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1774041035, now seen corresponding path program 54 times [2021-06-05 13:42:38,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:38,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21636688] [2021-06-05 13:42:38,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:38,842 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 13:42:38,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:38,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21636688] [2021-06-05 13:42:38,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21636688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:38,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930765134] [2021-06-05 13:42:38,843 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:42:38,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:42:38,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:38,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:38,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:38,969 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 13:42:38,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930765134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:38,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:38,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-05 13:42:38,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629758966] [2021-06-05 13:42:38,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:38,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:38,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:38,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:38,970 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 13:42:39,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:39,145 INFO L93 Difference]: Finished difference Result 526 states and 1217 transitions. [2021-06-05 13:42:39,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:42:39,145 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 13:42:39,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:39,146 INFO L225 Difference]: With dead ends: 526 [2021-06-05 13:42:39,146 INFO L226 Difference]: Without dead ends: 523 [2021-06-05 13:42:39,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 153.6ms TimeCoverageRelationStatistics Valid=226, Invalid=374, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:42:39,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-06-05 13:42:39,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 274. [2021-06-05 13:42:39,150 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 13:42:39,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 750 transitions. [2021-06-05 13:42:39,151 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 750 transitions. Word has length 18 [2021-06-05 13:42:39,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:39,151 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 750 transitions. [2021-06-05 13:42:39,151 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 13:42:39,151 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 750 transitions. [2021-06-05 13:42:39,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:39,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:39,151 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:39,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:39,361 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:39,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:39,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1309449931, now seen corresponding path program 55 times [2021-06-05 13:42:39,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:39,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193156988] [2021-06-05 13:42:39,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:39,378 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 13:42:39,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:39,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193156988] [2021-06-05 13:42:39,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193156988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:39,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578959038] [2021-06-05 13:42:39,379 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 13:42:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:39,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:39,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:39,471 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 13:42:39,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578959038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:39,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:39,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-05 13:42:39,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433209664] [2021-06-05 13:42:39,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:39,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:39,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:39,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:39,473 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 13:42:39,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:39,745 INFO L93 Difference]: Finished difference Result 468 states and 1095 transitions. [2021-06-05 13:42:39,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:42:39,746 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 13:42:39,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:39,747 INFO L225 Difference]: With dead ends: 468 [2021-06-05 13:42:39,747 INFO L226 Difference]: Without dead ends: 464 [2021-06-05 13:42:39,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 243.4ms TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:42:39,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-06-05 13:42:39,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 272. [2021-06-05 13:42:39,751 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 13:42:39,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 741 transitions. [2021-06-05 13:42:39,751 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 741 transitions. Word has length 18 [2021-06-05 13:42:39,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:39,751 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 741 transitions. [2021-06-05 13:42:39,751 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 13:42:39,751 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 741 transitions. [2021-06-05 13:42:39,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:39,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:39,752 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:39,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-06-05 13:42:39,967 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:39,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:39,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1275850703, now seen corresponding path program 56 times [2021-06-05 13:42:39,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:39,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651085202] [2021-06-05 13:42:39,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:39,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:39,990 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 13:42:39,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:39,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651085202] [2021-06-05 13:42:39,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651085202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:39,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150445131] [2021-06-05 13:42:39,990 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 13:42:40,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:40,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:40,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:40,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:40,071 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 13:42:40,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150445131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:40,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:40,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 13:42:40,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152023995] [2021-06-05 13:42:40,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:40,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:40,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:40,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:40,072 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 13:42:40,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:40,310 INFO L93 Difference]: Finished difference Result 487 states and 1167 transitions. [2021-06-05 13:42:40,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:42:40,310 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 13:42:40,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:40,312 INFO L225 Difference]: With dead ends: 487 [2021-06-05 13:42:40,312 INFO L226 Difference]: Without dead ends: 479 [2021-06-05 13:42:40,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=387, Invalid=873, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 13:42:40,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-05 13:42:40,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 293. [2021-06-05 13:42:40,316 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 13:42:40,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 815 transitions. [2021-06-05 13:42:40,316 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 815 transitions. Word has length 18 [2021-06-05 13:42:40,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:40,316 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 815 transitions. [2021-06-05 13:42:40,316 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 13:42:40,316 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 815 transitions. [2021-06-05 13:42:40,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:40,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:40,317 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:40,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:40,536 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:40,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:40,537 INFO L82 PathProgramCache]: Analyzing trace with hash 234274635, now seen corresponding path program 57 times [2021-06-05 13:42:40,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:40,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405233968] [2021-06-05 13:42:40,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:40,563 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 13:42:40,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:40,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405233968] [2021-06-05 13:42:40,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405233968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:40,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013527425] [2021-06-05 13:42:40,563 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 13:42:40,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:42:40,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:40,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:40,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:40,642 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 13:42:40,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013527425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:40,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:40,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 13:42:40,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869486382] [2021-06-05 13:42:40,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:42:40,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:40,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:42:40,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:42:40,643 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 13:42:40,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:40,848 INFO L93 Difference]: Finished difference Result 466 states and 1157 transitions. [2021-06-05 13:42:40,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:42:40,848 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 13:42:40,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:40,849 INFO L225 Difference]: With dead ends: 466 [2021-06-05 13:42:40,849 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 13:42:40,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 13:42:40,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 13:42:40,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 312. [2021-06-05 13:42:40,853 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 13:42:40,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 871 transitions. [2021-06-05 13:42:40,853 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 871 transitions. Word has length 18 [2021-06-05 13:42:40,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:40,854 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 871 transitions. [2021-06-05 13:42:40,854 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 13:42:40,854 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 871 transitions. [2021-06-05 13:42:40,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:40,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:40,854 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:41,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:41,069 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:41,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:41,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1797099147, now seen corresponding path program 58 times [2021-06-05 13:42:41,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:41,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707784836] [2021-06-05 13:42:41,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:41,095 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 13:42:41,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:41,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707784836] [2021-06-05 13:42:41,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707784836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:41,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880094140] [2021-06-05 13:42:41,096 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 13:42:41,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:41,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:41,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:41,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:41,169 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 13:42:41,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880094140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:41,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:41,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 13:42:41,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500726757] [2021-06-05 13:42:41,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:42:41,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:41,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:42:41,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:41,170 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 13:42:41,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:41,237 INFO L93 Difference]: Finished difference Result 436 states and 1155 transitions. [2021-06-05 13:42:41,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:42:41,237 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 13:42:41,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:41,239 INFO L225 Difference]: With dead ends: 436 [2021-06-05 13:42:41,239 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 13:42:41,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:42:41,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 13:42:41,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 316. [2021-06-05 13:42:41,242 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 13:42:41,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 886 transitions. [2021-06-05 13:42:41,243 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 886 transitions. Word has length 18 [2021-06-05 13:42:41,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:41,246 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 886 transitions. [2021-06-05 13:42:41,246 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 13:42:41,246 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 886 transitions. [2021-06-05 13:42:41,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:41,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:41,247 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:41,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:41,449 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:41,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:41,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1169170729, now seen corresponding path program 59 times [2021-06-05 13:42:41,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:41,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737694350] [2021-06-05 13:42:41,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:41,477 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 13:42:41,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:41,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737694350] [2021-06-05 13:42:41,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737694350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:41,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268543901] [2021-06-05 13:42:41,478 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 13:42:41,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:42:41,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:41,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:41,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:41,548 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 13:42:41,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268543901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:41,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:41,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 13:42:41,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397243095] [2021-06-05 13:42:41,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:41,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:41,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:41,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:41,549 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 13:42:41,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:41,652 INFO L93 Difference]: Finished difference Result 389 states and 1033 transitions. [2021-06-05 13:42:41,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:42:41,652 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 13:42:41,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:41,653 INFO L225 Difference]: With dead ends: 389 [2021-06-05 13:42:41,653 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 13:42:41,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:42:41,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 13:42:41,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 319. [2021-06-05 13:42:41,657 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 13:42:41,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 895 transitions. [2021-06-05 13:42:41,657 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 895 transitions. Word has length 18 [2021-06-05 13:42:41,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:41,657 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 895 transitions. [2021-06-05 13:42:41,657 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 13:42:41,657 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 895 transitions. [2021-06-05 13:42:41,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:41,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:41,658 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:41,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 13:42:41,873 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:41,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:41,873 INFO L82 PathProgramCache]: Analyzing trace with hash 937613391, now seen corresponding path program 60 times [2021-06-05 13:42:41,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:41,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22563542] [2021-06-05 13:42:41,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:41,899 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 13:42:41,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:41,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22563542] [2021-06-05 13:42:41,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22563542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:41,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807950150] [2021-06-05 13:42:41,899 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 13:42:41,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:42:41,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:41,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:41,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:41,968 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 13:42:41,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807950150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:41,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:41,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 13:42:41,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224197708] [2021-06-05 13:42:41,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:41,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:41,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:41,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:41,969 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 13:42:42,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:42,106 INFO L93 Difference]: Finished difference Result 399 states and 1054 transitions. [2021-06-05 13:42:42,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:42:42,106 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 13:42:42,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:42,107 INFO L225 Difference]: With dead ends: 399 [2021-06-05 13:42:42,107 INFO L226 Difference]: Without dead ends: 399 [2021-06-05 13:42:42,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:42:42,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-05 13:42:42,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 322. [2021-06-05 13:42:42,111 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 13:42:42,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 904 transitions. [2021-06-05 13:42:42,111 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 904 transitions. Word has length 18 [2021-06-05 13:42:42,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:42,112 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 904 transitions. [2021-06-05 13:42:42,112 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 13:42:42,112 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 904 transitions. [2021-06-05 13:42:42,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:42,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:42,113 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:42,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:42,328 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:42,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:42,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1211183145, now seen corresponding path program 61 times [2021-06-05 13:42:42,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:42,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994648801] [2021-06-05 13:42:42,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:42,356 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 13:42:42,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:42,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994648801] [2021-06-05 13:42:42,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994648801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:42,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499977925] [2021-06-05 13:42:42,357 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 13:42:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:42,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:42,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:42,425 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 13:42:42,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499977925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:42,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:42,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 13:42:42,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579755864] [2021-06-05 13:42:42,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:42,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:42,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:42,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:42,426 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 13:42:42,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:42,598 INFO L93 Difference]: Finished difference Result 497 states and 1220 transitions. [2021-06-05 13:42:42,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:42:42,598 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 13:42:42,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:42,600 INFO L225 Difference]: With dead ends: 497 [2021-06-05 13:42:42,600 INFO L226 Difference]: Without dead ends: 497 [2021-06-05 13:42:42,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 135.6ms TimeCoverageRelationStatistics Valid=259, Invalid=443, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:42:42,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-06-05 13:42:42,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 319. [2021-06-05 13:42:42,603 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 13:42:42,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 897 transitions. [2021-06-05 13:42:42,604 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 897 transitions. Word has length 18 [2021-06-05 13:42:42,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:42,604 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 897 transitions. [2021-06-05 13:42:42,604 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 13:42:42,604 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 897 transitions. [2021-06-05 13:42:42,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:42,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:42,604 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:42,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 13:42:42,817 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:42,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:42,817 INFO L82 PathProgramCache]: Analyzing trace with hash -639728339, now seen corresponding path program 62 times [2021-06-05 13:42:42,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:42,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800341918] [2021-06-05 13:42:42,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:42,840 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 13:42:42,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:42,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800341918] [2021-06-05 13:42:42,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800341918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:42,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513817397] [2021-06-05 13:42:42,840 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 13:42:42,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:42,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:42,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:42,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:42,922 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 13:42:42,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513817397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:42,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:42,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 13:42:42,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913792218] [2021-06-05 13:42:42,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:42,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:42,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:42,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:42,923 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 13:42:43,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:43,121 INFO L93 Difference]: Finished difference Result 422 states and 1069 transitions. [2021-06-05 13:42:43,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:42:43,121 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 13:42:43,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:43,122 INFO L225 Difference]: With dead ends: 422 [2021-06-05 13:42:43,123 INFO L226 Difference]: Without dead ends: 416 [2021-06-05 13:42:43,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 159.4ms TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:42:43,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-05 13:42:43,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 313. [2021-06-05 13:42:43,126 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 13:42:43,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 877 transitions. [2021-06-05 13:42:43,126 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 877 transitions. Word has length 18 [2021-06-05 13:42:43,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:43,126 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 877 transitions. [2021-06-05 13:42:43,127 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 13:42:43,127 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 877 transitions. [2021-06-05 13:42:43,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:43,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:43,127 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:43,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 13:42:43,328 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:43,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:43,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1723667411, now seen corresponding path program 63 times [2021-06-05 13:42:43,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:43,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205463376] [2021-06-05 13:42:43,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:43,361 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 13:42:43,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:43,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205463376] [2021-06-05 13:42:43,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205463376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:43,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264124559] [2021-06-05 13:42:43,362 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 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 13:42:43,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:42:43,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:43,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:43,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:43,454 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 13:42:43,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264124559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:43,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:43,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 13:42:43,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208735223] [2021-06-05 13:42:43,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:43,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:43,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:43,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:43,454 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 13:42:43,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:43,604 INFO L93 Difference]: Finished difference Result 573 states and 1416 transitions. [2021-06-05 13:42:43,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:42:43,605 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 13:42:43,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:43,606 INFO L225 Difference]: With dead ends: 573 [2021-06-05 13:42:43,606 INFO L226 Difference]: Without dead ends: 570 [2021-06-05 13:42:43,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 135.2ms TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:42:43,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-05 13:42:43,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 353. [2021-06-05 13:42:43,611 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 13:42:43,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1012 transitions. [2021-06-05 13:42:43,611 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1012 transitions. Word has length 18 [2021-06-05 13:42:43,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:43,611 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1012 transitions. [2021-06-05 13:42:43,611 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 13:42:43,611 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1012 transitions. [2021-06-05 13:42:43,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:43,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:43,612 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:43,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 13:42:43,825 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:43,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:43,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1259076307, now seen corresponding path program 64 times [2021-06-05 13:42:43,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:43,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659619364] [2021-06-05 13:42:43,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:43,851 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 13:42:43,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:43,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659619364] [2021-06-05 13:42:43,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659619364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:43,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516584886] [2021-06-05 13:42:43,851 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 13:42:43,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:43,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:43,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:43,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:43,934 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 13:42:43,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516584886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:43,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:43,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 13:42:43,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620585800] [2021-06-05 13:42:43,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:43,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:43,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:43,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:43,934 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 13:42:44,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:44,141 INFO L93 Difference]: Finished difference Result 554 states and 1385 transitions. [2021-06-05 13:42:44,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:42:44,142 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 13:42:44,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:44,143 INFO L225 Difference]: With dead ends: 554 [2021-06-05 13:42:44,143 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 13:42:44,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 168.7ms TimeCoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:42:44,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 13:42:44,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 334. [2021-06-05 13:42:44,147 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 13:42:44,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 940 transitions. [2021-06-05 13:42:44,148 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 940 transitions. Word has length 18 [2021-06-05 13:42:44,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:44,148 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 940 transitions. [2021-06-05 13:42:44,148 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 13:42:44,148 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 940 transitions. [2021-06-05 13:42:44,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:44,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:44,148 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:44,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:44,353 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:44,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:44,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1225477079, now seen corresponding path program 65 times [2021-06-05 13:42:44,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:44,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512418435] [2021-06-05 13:42:44,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:44,378 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 13:42:44,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:44,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512418435] [2021-06-05 13:42:44,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512418435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:44,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464059399] [2021-06-05 13:42:44,378 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 13:42:44,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:44,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:44,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:44,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:44,447 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 13:42:44,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464059399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:44,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:44,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 13:42:44,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319560093] [2021-06-05 13:42:44,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:44,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:44,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:44,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:44,448 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 13:42:44,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:44,624 INFO L93 Difference]: Finished difference Result 542 states and 1356 transitions. [2021-06-05 13:42:44,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:42:44,625 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 13:42:44,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:44,626 INFO L225 Difference]: With dead ends: 542 [2021-06-05 13:42:44,626 INFO L226 Difference]: Without dead ends: 534 [2021-06-05 13:42:44,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:42:44,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-05 13:42:44,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 348. [2021-06-05 13:42:44,630 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 13:42:44,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 982 transitions. [2021-06-05 13:42:44,630 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 982 transitions. Word has length 18 [2021-06-05 13:42:44,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:44,631 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 982 transitions. [2021-06-05 13:42:44,631 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 13:42:44,631 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 982 transitions. [2021-06-05 13:42:44,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:44,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:44,631 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:44,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 13:42:44,837 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:44,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:44,837 INFO L82 PathProgramCache]: Analyzing trace with hash 183901011, now seen corresponding path program 66 times [2021-06-05 13:42:44,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:44,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282500503] [2021-06-05 13:42:44,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:44,876 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 13:42:44,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:44,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282500503] [2021-06-05 13:42:44,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282500503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:44,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139581499] [2021-06-05 13:42:44,877 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 13:42:44,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:42:44,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:44,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:44,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:44,970 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 13:42:44,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139581499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:44,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:44,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 13:42:44,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482040963] [2021-06-05 13:42:44,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:44,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:44,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:44,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:44,971 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 13:42:45,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:45,113 INFO L93 Difference]: Finished difference Result 473 states and 1218 transitions. [2021-06-05 13:42:45,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:42:45,113 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 13:42:45,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:45,115 INFO L225 Difference]: With dead ends: 473 [2021-06-05 13:42:45,115 INFO L226 Difference]: Without dead ends: 467 [2021-06-05 13:42:45,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:42:45,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-06-05 13:42:45,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 349. [2021-06-05 13:42:45,119 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 13:42:45,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 982 transitions. [2021-06-05 13:42:45,119 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 982 transitions. Word has length 18 [2021-06-05 13:42:45,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:45,119 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 982 transitions. [2021-06-05 13:42:45,119 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 13:42:45,119 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 982 transitions. [2021-06-05 13:42:45,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:45,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:45,121 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:45,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:45,336 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:45,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:45,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1388993577, now seen corresponding path program 67 times [2021-06-05 13:42:45,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:45,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824018035] [2021-06-05 13:42:45,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:45,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:45,365 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 13:42:45,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:45,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824018035] [2021-06-05 13:42:45,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824018035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:45,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405547151] [2021-06-05 13:42:45,365 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) [2021-06-05 13:42:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:45,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:45,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:45,445 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 13:42:45,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405547151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:45,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:45,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 13:42:45,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204902199] [2021-06-05 13:42:45,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:42:45,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:45,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:42:45,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:42:45,446 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 13:42:45,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:45,510 INFO L93 Difference]: Finished difference Result 405 states and 1105 transitions. [2021-06-05 13:42:45,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:42:45,511 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 13:42:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:45,512 INFO L225 Difference]: With dead ends: 405 [2021-06-05 13:42:45,512 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 13:42:45,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:42:45,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 13:42:45,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 349. [2021-06-05 13:42:45,516 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 13:42:45,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 981 transitions. [2021-06-05 13:42:45,516 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 981 transitions. Word has length 18 [2021-06-05 13:42:45,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:45,516 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 981 transitions. [2021-06-05 13:42:45,516 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 13:42:45,516 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 981 transitions. [2021-06-05 13:42:45,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:45,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:45,517 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:45,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-06-05 13:42:45,717 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:45,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:45,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1365743627, now seen corresponding path program 68 times [2021-06-05 13:42:45,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:45,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949638055] [2021-06-05 13:42:45,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:45,743 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 13:42:45,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:45,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949638055] [2021-06-05 13:42:45,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949638055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:45,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015695873] [2021-06-05 13:42:45,744 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 13:42:45,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:45,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:45,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:45,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:45,827 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 13:42:45,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015695873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:45,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:45,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 13:42:45,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363141429] [2021-06-05 13:42:45,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:45,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:45,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:45,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:45,828 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 13:42:46,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:46,003 INFO L93 Difference]: Finished difference Result 447 states and 1174 transitions. [2021-06-05 13:42:46,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:42:46,004 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 13:42:46,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:46,005 INFO L225 Difference]: With dead ends: 447 [2021-06-05 13:42:46,005 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 13:42:46,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 150.9ms TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:42:46,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 13:42:46,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 354. [2021-06-05 13:42:46,008 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 13:42:46,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 995 transitions. [2021-06-05 13:42:46,009 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 995 transitions. Word has length 18 [2021-06-05 13:42:46,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:46,009 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 995 transitions. [2021-06-05 13:42:46,009 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 13:42:46,009 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 995 transitions. [2021-06-05 13:42:46,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:46,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:46,010 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:46,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:46,213 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:46,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:46,213 INFO L82 PathProgramCache]: Analyzing trace with hash 63358731, now seen corresponding path program 69 times [2021-06-05 13:42:46,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:46,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546314032] [2021-06-05 13:42:46,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:46,241 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 13:42:46,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:46,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546314032] [2021-06-05 13:42:46,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546314032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:46,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500631895] [2021-06-05 13:42:46,241 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 13:42:46,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:42:46,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:46,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:46,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:46,327 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 13:42:46,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500631895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:46,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:46,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 13:42:46,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322182083] [2021-06-05 13:42:46,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:46,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:46,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:46,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:46,328 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 13:42:46,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:46,499 INFO L93 Difference]: Finished difference Result 485 states and 1256 transitions. [2021-06-05 13:42:46,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:42:46,499 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 13:42:46,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:46,500 INFO L225 Difference]: With dead ends: 485 [2021-06-05 13:42:46,500 INFO L226 Difference]: Without dead ends: 483 [2021-06-05 13:42:46,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 139.1ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:42:46,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-05 13:42:46,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 352. [2021-06-05 13:42:46,504 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 13:42:46,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 993 transitions. [2021-06-05 13:42:46,504 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 993 transitions. Word has length 18 [2021-06-05 13:42:46,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:46,504 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 993 transitions. [2021-06-05 13:42:46,504 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 13:42:46,504 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 993 transitions. [2021-06-05 13:42:46,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:46,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:46,505 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:46,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 13:42:46,710 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:46,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:46,710 INFO L82 PathProgramCache]: Analyzing trace with hash 21346315, now seen corresponding path program 70 times [2021-06-05 13:42:46,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:46,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078918948] [2021-06-05 13:42:46,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:46,731 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 13:42:46,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:46,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078918948] [2021-06-05 13:42:46,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078918948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:46,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942559661] [2021-06-05 13:42:46,731 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 13:42:46,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:46,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:46,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:46,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:46,806 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 13:42:46,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942559661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:46,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:46,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 13:42:46,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607439954] [2021-06-05 13:42:46,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:46,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:46,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:46,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:46,807 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 13:42:46,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:46,987 INFO L93 Difference]: Finished difference Result 553 states and 1393 transitions. [2021-06-05 13:42:46,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:42:46,988 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 13:42:46,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:46,989 INFO L225 Difference]: With dead ends: 553 [2021-06-05 13:42:46,989 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 13:42:46,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 142.2ms TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:42:46,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 13:42:46,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 355. [2021-06-05 13:42:46,993 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 13:42:46,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1000 transitions. [2021-06-05 13:42:46,993 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1000 transitions. Word has length 18 [2021-06-05 13:42:46,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:46,993 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1000 transitions. [2021-06-05 13:42:46,993 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 13:42:46,993 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1000 transitions. [2021-06-05 13:42:46,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:46,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:46,994 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:47,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:47,209 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:47,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:47,210 INFO L82 PathProgramCache]: Analyzing trace with hash 592801121, now seen corresponding path program 71 times [2021-06-05 13:42:47,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:47,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464596432] [2021-06-05 13:42:47,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:47,232 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 13:42:47,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:47,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464596432] [2021-06-05 13:42:47,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464596432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:47,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629618867] [2021-06-05 13:42:47,232 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 13:42:47,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:42:47,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:47,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:47,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:47,306 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 13:42:47,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629618867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:47,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:47,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 13:42:47,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594670225] [2021-06-05 13:42:47,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:47,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:47,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:47,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:47,308 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 13:42:47,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:47,525 INFO L93 Difference]: Finished difference Result 530 states and 1319 transitions. [2021-06-05 13:42:47,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:42:47,525 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 13:42:47,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:47,526 INFO L225 Difference]: With dead ends: 530 [2021-06-05 13:42:47,526 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 13:42:47,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 182.4ms TimeCoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:42:47,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 13:42:47,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 341. [2021-06-05 13:42:47,530 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 13:42:47,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 952 transitions. [2021-06-05 13:42:47,531 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 952 transitions. Word has length 18 [2021-06-05 13:42:47,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:47,531 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 952 transitions. [2021-06-05 13:42:47,531 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 13:42:47,531 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 952 transitions. [2021-06-05 13:42:47,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:47,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:47,531 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:47,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 13:42:47,732 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:47,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:47,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1128030923, now seen corresponding path program 72 times [2021-06-05 13:42:47,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:47,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283917832] [2021-06-05 13:42:47,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:47,770 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 13:42:47,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:47,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283917832] [2021-06-05 13:42:47,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283917832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:47,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99072] [2021-06-05 13:42:47,771 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 13:42:47,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:42:47,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:47,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:47,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:47,876 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 13:42:47,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:47,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:47,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 13:42:47,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230769229] [2021-06-05 13:42:47,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:47,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:47,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:47,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:47,885 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 13:42:48,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:48,102 INFO L93 Difference]: Finished difference Result 483 states and 1236 transitions. [2021-06-05 13:42:48,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:42:48,102 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 13:42:48,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:48,103 INFO L225 Difference]: With dead ends: 483 [2021-06-05 13:42:48,103 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 13:42:48,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 198.8ms TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:42:48,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 13:42:48,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 348. [2021-06-05 13:42:48,107 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 13:42:48,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 975 transitions. [2021-06-05 13:42:48,107 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 975 transitions. Word has length 18 [2021-06-05 13:42:48,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:48,107 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 975 transitions. [2021-06-05 13:42:48,107 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 13:42:48,107 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 975 transitions. [2021-06-05 13:42:48,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:48,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:48,108 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:48,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 13:42:48,308 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:48,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:48,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1656289961, now seen corresponding path program 73 times [2021-06-05 13:42:48,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:48,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679263261] [2021-06-05 13:42:48,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:48,349 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 13:42:48,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:48,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679263261] [2021-06-05 13:42:48,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679263261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:48,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588828819] [2021-06-05 13:42:48,349 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 13:42:48,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:48,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:48,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:48,460 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 13:42:48,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588828819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:48,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:48,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 13:42:48,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906116530] [2021-06-05 13:42:48,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:42:48,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:48,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:42:48,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:42:48,461 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 13:42:48,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:48,685 INFO L93 Difference]: Finished difference Result 521 states and 1344 transitions. [2021-06-05 13:42:48,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:42:48,686 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 13:42:48,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:48,687 INFO L225 Difference]: With dead ends: 521 [2021-06-05 13:42:48,687 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 13:42:48,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 200.8ms TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:42:48,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 13:42:48,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 368. [2021-06-05 13:42:48,690 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 13:42:48,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1033 transitions. [2021-06-05 13:42:48,691 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1033 transitions. Word has length 18 [2021-06-05 13:42:48,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:48,691 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1033 transitions. [2021-06-05 13:42:48,691 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 13:42:48,691 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1033 transitions. [2021-06-05 13:42:48,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:48,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:48,692 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:48,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:48,892 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:48,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:48,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1268731953, now seen corresponding path program 74 times [2021-06-05 13:42:48,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:48,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639674642] [2021-06-05 13:42:48,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:48,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:48,921 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 13:42:48,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:48,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639674642] [2021-06-05 13:42:48,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639674642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:48,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221074578] [2021-06-05 13:42:48,921 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 13:42:48,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:48,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:48,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:48,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:48,997 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 13:42:48,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221074578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:48,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:48,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 13:42:48,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903528774] [2021-06-05 13:42:48,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:48,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:48,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:48,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:48,998 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 13:42:49,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:49,209 INFO L93 Difference]: Finished difference Result 613 states and 1567 transitions. [2021-06-05 13:42:49,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:42:49,209 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 13:42:49,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:49,210 INFO L225 Difference]: With dead ends: 613 [2021-06-05 13:42:49,210 INFO L226 Difference]: Without dead ends: 613 [2021-06-05 13:42:49,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 161.6ms TimeCoverageRelationStatistics Valid=230, Invalid=472, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:42:49,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-05 13:42:49,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 413. [2021-06-05 13:42:49,215 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 13:42:49,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1177 transitions. [2021-06-05 13:42:49,216 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1177 transitions. Word has length 18 [2021-06-05 13:42:49,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:49,216 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1177 transitions. [2021-06-05 13:42:49,216 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 13:42:49,216 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1177 transitions. [2021-06-05 13:42:49,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:49,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:49,217 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:49,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 13:42:49,417 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:49,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:49,417 INFO L82 PathProgramCache]: Analyzing trace with hash -424946089, now seen corresponding path program 75 times [2021-06-05 13:42:49,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:49,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882944204] [2021-06-05 13:42:49,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:49,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:49,450 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 13:42:49,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:49,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882944204] [2021-06-05 13:42:49,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882944204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:49,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082040999] [2021-06-05 13:42:49,450 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 13:42:49,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:42:49,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:49,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:49,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:49,564 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 13:42:49,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082040999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:49,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:49,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-05 13:42:49,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690795197] [2021-06-05 13:42:49,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:49,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:49,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:49,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:49,565 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 13:42:49,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:49,769 INFO L93 Difference]: Finished difference Result 723 states and 1864 transitions. [2021-06-05 13:42:49,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:42:49,775 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 13:42:49,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:49,776 INFO L225 Difference]: With dead ends: 723 [2021-06-05 13:42:49,776 INFO L226 Difference]: Without dead ends: 723 [2021-06-05 13:42:49,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 164.3ms TimeCoverageRelationStatistics Valid=226, Invalid=374, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:42:49,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-06-05 13:42:49,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 473. [2021-06-05 13:42:49,781 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 13:42:49,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1374 transitions. [2021-06-05 13:42:49,782 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1374 transitions. Word has length 18 [2021-06-05 13:42:49,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:49,782 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1374 transitions. [2021-06-05 13:42:49,782 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 13:42:49,782 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1374 transitions. [2021-06-05 13:42:49,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:49,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:49,783 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:49,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 13:42:49,993 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:49,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:49,993 INFO L82 PathProgramCache]: Analyzing trace with hash 146508717, now seen corresponding path program 76 times [2021-06-05 13:42:49,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:49,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855530272] [2021-06-05 13:42:49,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:50,013 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 13:42:50,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:50,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855530272] [2021-06-05 13:42:50,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855530272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:50,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238829567] [2021-06-05 13:42:50,014 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 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 13:42:50,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:50,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:50,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:50,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:50,085 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 13:42:50,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238829567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:50,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:50,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-05 13:42:50,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262948391] [2021-06-05 13:42:50,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:42:50,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:50,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:42:50,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:42:50,086 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 13:42:50,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:50,342 INFO L93 Difference]: Finished difference Result 693 states and 1787 transitions. [2021-06-05 13:42:50,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:42:50,342 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 13:42:50,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:50,343 INFO L225 Difference]: With dead ends: 693 [2021-06-05 13:42:50,343 INFO L226 Difference]: Without dead ends: 687 [2021-06-05 13:42:50,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 225.8ms TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:42:50,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-06-05 13:42:50,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 463. [2021-06-05 13:42:50,348 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 13:42:50,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1335 transitions. [2021-06-05 13:42:50,349 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1335 transitions. Word has length 18 [2021-06-05 13:42:50,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:50,349 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1335 transitions. [2021-06-05 13:42:50,349 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 13:42:50,349 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1335 transitions. [2021-06-05 13:42:50,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:50,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:50,350 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:50,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:50,550 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:50,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:50,551 INFO L82 PathProgramCache]: Analyzing trace with hash 681738519, now seen corresponding path program 77 times [2021-06-05 13:42:50,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:50,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272752148] [2021-06-05 13:42:50,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:50,578 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 13:42:50,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:50,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272752148] [2021-06-05 13:42:50,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272752148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:50,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095206247] [2021-06-05 13:42:50,578 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 13:42:50,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:50,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:50,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:50,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:50,656 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 13:42:50,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095206247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:50,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:50,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 13:42:50,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584908850] [2021-06-05 13:42:50,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:50,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:50,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:50,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:50,657 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 13:42:50,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:50,887 INFO L93 Difference]: Finished difference Result 706 states and 1819 transitions. [2021-06-05 13:42:50,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:42:50,887 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 13:42:50,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:50,888 INFO L225 Difference]: With dead ends: 706 [2021-06-05 13:42:50,888 INFO L226 Difference]: Without dead ends: 694 [2021-06-05 13:42:50,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 197.7ms TimeCoverageRelationStatistics Valid=387, Invalid=873, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 13:42:50,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-06-05 13:42:50,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 476. [2021-06-05 13:42:50,894 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 13:42:50,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1379 transitions. [2021-06-05 13:42:50,894 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1379 transitions. Word has length 18 [2021-06-05 13:42:50,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:50,894 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1379 transitions. [2021-06-05 13:42:50,894 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 13:42:50,895 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1379 transitions. [2021-06-05 13:42:50,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:42:50,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:50,895 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:51,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:51,096 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:51,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:51,096 INFO L82 PathProgramCache]: Analyzing trace with hash 93993197, now seen corresponding path program 78 times [2021-06-05 13:42:51,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:51,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74303595] [2021-06-05 13:42:51,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:51,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:51,127 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 13:42:51,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:51,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74303595] [2021-06-05 13:42:51,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74303595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:51,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915839595] [2021-06-05 13:42:51,127 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 13:42:51,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:42:51,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:51,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:42:51,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:51,254 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 13:42:51,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915839595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:51,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:51,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 13:42:51,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870074645] [2021-06-05 13:42:51,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:42:51,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:51,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:42:51,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:42:51,255 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 13:42:51,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:51,475 INFO L93 Difference]: Finished difference Result 674 states and 1783 transitions. [2021-06-05 13:42:51,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:42:51,476 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 13:42:51,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:51,477 INFO L225 Difference]: With dead ends: 674 [2021-06-05 13:42:51,477 INFO L226 Difference]: Without dead ends: 656 [2021-06-05 13:42:51,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 231.3ms TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 13:42:51,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-06-05 13:42:51,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 498. [2021-06-05 13:42:51,482 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 13:42:51,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1442 transitions. [2021-06-05 13:42:51,483 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1442 transitions. Word has length 18 [2021-06-05 13:42:51,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:51,483 INFO L482 AbstractCegarLoop]: Abstraction has 498 states and 1442 transitions. [2021-06-05 13:42:51,483 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 13:42:51,483 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1442 transitions. [2021-06-05 13:42:51,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:42:51,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:51,483 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:51,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:51,684 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:51,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:51,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1452121605, now seen corresponding path program 79 times [2021-06-05 13:42:51,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:51,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778133372] [2021-06-05 13:42:51,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:51,765 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 13:42:51,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:51,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778133372] [2021-06-05 13:42:51,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778133372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:51,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158531296] [2021-06-05 13:42:51,766 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 13:42:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:51,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:42:51,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:51,873 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 13:42:51,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158531296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:51,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:51,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 13:42:51,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788727984] [2021-06-05 13:42:51,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:51,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:51,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:51,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:51,874 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 13:42:52,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:52,058 INFO L93 Difference]: Finished difference Result 678 states and 1761 transitions. [2021-06-05 13:42:52,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:42:52,058 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 13:42:52,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:52,059 INFO L225 Difference]: With dead ends: 678 [2021-06-05 13:42:52,059 INFO L226 Difference]: Without dead ends: 655 [2021-06-05 13:42:52,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:42:52,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-05 13:42:52,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 531. [2021-06-05 13:42:52,064 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 13:42:52,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1520 transitions. [2021-06-05 13:42:52,065 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1520 transitions. Word has length 19 [2021-06-05 13:42:52,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:52,065 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1520 transitions. [2021-06-05 13:42:52,065 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 13:42:52,065 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1520 transitions. [2021-06-05 13:42:52,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:42:52,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:52,066 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:52,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:52,281 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:52,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:52,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1378493247, now seen corresponding path program 80 times [2021-06-05 13:42:52,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:52,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940343842] [2021-06-05 13:42:52,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:52,354 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 13:42:52,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:52,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940343842] [2021-06-05 13:42:52,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940343842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:52,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134319691] [2021-06-05 13:42:52,354 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) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:52,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:52,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:52,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:42:52,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:52,468 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 13:42:52,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134319691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:52,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:52,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 13:42:52,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132738466] [2021-06-05 13:42:52,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:52,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:52,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:52,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:52,469 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 13:42:52,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:52,603 INFO L93 Difference]: Finished difference Result 714 states and 1853 transitions. [2021-06-05 13:42:52,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:42:52,603 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 13:42:52,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:52,605 INFO L225 Difference]: With dead ends: 714 [2021-06-05 13:42:52,605 INFO L226 Difference]: Without dead ends: 707 [2021-06-05 13:42:52,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 138.7ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:42:52,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-06-05 13:42:52,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 555. [2021-06-05 13:42:52,616 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 13:42:52,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1604 transitions. [2021-06-05 13:42:52,617 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1604 transitions. Word has length 19 [2021-06-05 13:42:52,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:52,617 INFO L482 AbstractCegarLoop]: Abstraction has 555 states and 1604 transitions. [2021-06-05 13:42:52,617 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 13:42:52,617 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1604 transitions. [2021-06-05 13:42:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:42:52,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:52,618 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:52,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 13:42:52,829 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:52,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:52,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1301771325, now seen corresponding path program 81 times [2021-06-05 13:42:52,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:52,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812193568] [2021-06-05 13:42:52,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:52,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:52,903 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 13:42:52,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:52,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812193568] [2021-06-05 13:42:52,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812193568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:52,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293152906] [2021-06-05 13:42:52,904 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 13:42:52,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:42:52,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:52,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:42:52,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:53,000 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 13:42:53,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293152906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:53,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:53,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 13:42:53,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581585142] [2021-06-05 13:42:53,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:53,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:53,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:53,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:53,001 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 13:42:53,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:53,167 INFO L93 Difference]: Finished difference Result 700 states and 1833 transitions. [2021-06-05 13:42:53,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:42:53,167 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 13:42:53,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:53,168 INFO L225 Difference]: With dead ends: 700 [2021-06-05 13:42:53,168 INFO L226 Difference]: Without dead ends: 684 [2021-06-05 13:42:53,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 153.0ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:42:53,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-06-05 13:42:53,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 542. [2021-06-05 13:42:53,174 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 13:42:53,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1565 transitions. [2021-06-05 13:42:53,175 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1565 transitions. Word has length 19 [2021-06-05 13:42:53,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:53,175 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1565 transitions. [2021-06-05 13:42:53,175 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 13:42:53,175 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1565 transitions. [2021-06-05 13:42:53,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:42:53,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:53,176 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:53,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 13:42:53,376 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:53,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:53,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1949948053, now seen corresponding path program 82 times [2021-06-05 13:42:53,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:53,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197682400] [2021-06-05 13:42:53,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:53,441 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 13:42:53,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:53,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197682400] [2021-06-05 13:42:53,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197682400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:53,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757251536] [2021-06-05 13:42:53,441 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 13:42:53,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:53,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:53,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:42:53,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:53,544 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 13:42:53,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757251536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:53,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:53,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 13:42:53,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402650116] [2021-06-05 13:42:53,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:53,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:53,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:53,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:53,545 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 13:42:53,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:53,704 INFO L93 Difference]: Finished difference Result 698 states and 1814 transitions. [2021-06-05 13:42:53,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:42:53,704 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 13:42:53,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:53,705 INFO L225 Difference]: With dead ends: 698 [2021-06-05 13:42:53,705 INFO L226 Difference]: Without dead ends: 691 [2021-06-05 13:42:53,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 143.7ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:42:53,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-06-05 13:42:53,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 542. [2021-06-05 13:42:53,711 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 13:42:53,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1565 transitions. [2021-06-05 13:42:53,712 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1565 transitions. Word has length 19 [2021-06-05 13:42:53,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:53,712 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1565 transitions. [2021-06-05 13:42:53,712 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 13:42:53,712 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1565 transitions. [2021-06-05 13:42:53,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:42:53,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:53,712 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:53,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:53,913 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:53,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:53,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1809789441, now seen corresponding path program 83 times [2021-06-05 13:42:53,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:53,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304588590] [2021-06-05 13:42:53,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:53,999 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 13:42:54,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:54,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304588590] [2021-06-05 13:42:54,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304588590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:54,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058506221] [2021-06-05 13:42:54,000 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 13:42:54,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:42:54,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:54,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:42:54,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:54,102 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 13:42:54,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058506221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:54,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:54,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 13:42:54,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613676242] [2021-06-05 13:42:54,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:54,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:54,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:54,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:54,103 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 13:42:54,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:54,286 INFO L93 Difference]: Finished difference Result 664 states and 1755 transitions. [2021-06-05 13:42:54,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:42:54,287 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 13:42:54,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:54,288 INFO L225 Difference]: With dead ends: 664 [2021-06-05 13:42:54,288 INFO L226 Difference]: Without dead ends: 657 [2021-06-05 13:42:54,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 179.0ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:42:54,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-06-05 13:42:54,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 542. [2021-06-05 13:42:54,293 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 13:42:54,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1565 transitions. [2021-06-05 13:42:54,294 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1565 transitions. Word has length 19 [2021-06-05 13:42:54,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:54,294 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1565 transitions. [2021-06-05 13:42:54,294 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 13:42:54,294 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1565 transitions. [2021-06-05 13:42:54,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:42:54,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:54,295 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:54,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 13:42:54,496 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:54,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:54,496 INFO L82 PathProgramCache]: Analyzing trace with hash -310264069, now seen corresponding path program 84 times [2021-06-05 13:42:54,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:54,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916597133] [2021-06-05 13:42:54,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:54,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:54,581 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 13:42:54,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:54,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916597133] [2021-06-05 13:42:54,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916597133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:54,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763842168] [2021-06-05 13:42:54,582 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 13:42:54,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:42:54,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:54,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:42:54,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:54,699 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 13:42:54,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763842168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:54,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:54,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 13:42:54,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672174842] [2021-06-05 13:42:54,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:42:54,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:54,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:42:54,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:42:54,701 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 13:42:54,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:54,823 INFO L93 Difference]: Finished difference Result 660 states and 1787 transitions. [2021-06-05 13:42:54,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:42:54,823 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 13:42:54,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:54,824 INFO L225 Difference]: With dead ends: 660 [2021-06-05 13:42:54,824 INFO L226 Difference]: Without dead ends: 653 [2021-06-05 13:42:54,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 159.7ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:42:54,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-06-05 13:42:54,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 555. [2021-06-05 13:42:54,829 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 13:42:54,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1612 transitions. [2021-06-05 13:42:54,830 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1612 transitions. Word has length 19 [2021-06-05 13:42:54,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:54,830 INFO L482 AbstractCegarLoop]: Abstraction has 555 states and 1612 transitions. [2021-06-05 13:42:54,830 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 13:42:54,830 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1612 transitions. [2021-06-05 13:42:54,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:42:54,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:54,831 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:55,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 13:42:55,031 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:55,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:55,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1304438655, now seen corresponding path program 85 times [2021-06-05 13:42:55,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:55,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666918194] [2021-06-05 13:42:55,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:55,109 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 13:42:55,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:55,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666918194] [2021-06-05 13:42:55,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666918194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:55,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053503076] [2021-06-05 13:42:55,109 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 13:42:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:55,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:42:55,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:55,217 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 13:42:55,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053503076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:55,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:55,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 13:42:55,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471279219] [2021-06-05 13:42:55,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:55,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:55,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:55,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:55,221 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 13:42:55,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:55,337 INFO L93 Difference]: Finished difference Result 661 states and 1784 transitions. [2021-06-05 13:42:55,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:42:55,337 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 13:42:55,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:55,338 INFO L225 Difference]: With dead ends: 661 [2021-06-05 13:42:55,338 INFO L226 Difference]: Without dead ends: 652 [2021-06-05 13:42:55,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 143.3ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:42:55,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-05 13:42:55,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 555. [2021-06-05 13:42:55,343 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 13:42:55,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1609 transitions. [2021-06-05 13:42:55,344 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1609 transitions. Word has length 19 [2021-06-05 13:42:55,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:55,344 INFO L482 AbstractCegarLoop]: Abstraction has 555 states and 1609 transitions. [2021-06-05 13:42:55,344 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 13:42:55,344 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1609 transitions. [2021-06-05 13:42:55,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:42:55,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:55,345 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:55,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:55,553 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:55,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:55,553 INFO L82 PathProgramCache]: Analyzing trace with hash -774855173, now seen corresponding path program 86 times [2021-06-05 13:42:55,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:55,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28053742] [2021-06-05 13:42:55,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:55,618 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 13:42:55,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:55,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28053742] [2021-06-05 13:42:55,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28053742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:55,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051217119] [2021-06-05 13:42:55,619 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 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 13:42:55,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:55,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:55,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:42:55,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:55,737 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 13:42:55,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051217119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:55,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:55,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 13:42:55,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990430772] [2021-06-05 13:42:55,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:55,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:55,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:55,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:55,738 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 13:42:55,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:55,868 INFO L93 Difference]: Finished difference Result 635 states and 1737 transitions. [2021-06-05 13:42:55,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:42:55,868 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 13:42:55,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:55,869 INFO L225 Difference]: With dead ends: 635 [2021-06-05 13:42:55,869 INFO L226 Difference]: Without dead ends: 628 [2021-06-05 13:42:55,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 146.9ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:42:55,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-06-05 13:42:55,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 555. [2021-06-05 13:42:55,877 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 13:42:55,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1609 transitions. [2021-06-05 13:42:55,878 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1609 transitions. Word has length 19 [2021-06-05 13:42:55,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:55,878 INFO L482 AbstractCegarLoop]: Abstraction has 555 states and 1609 transitions. [2021-06-05 13:42:55,878 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 13:42:55,878 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1609 transitions. [2021-06-05 13:42:55,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:42:55,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:55,880 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:56,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:56,093 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:56,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:56,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1122133313, now seen corresponding path program 87 times [2021-06-05 13:42:56,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:56,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8548514] [2021-06-05 13:42:56,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:56,270 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 13:42:56,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:56,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8548514] [2021-06-05 13:42:56,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8548514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:56,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305348780] [2021-06-05 13:42:56,270 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 13:42:56,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:42:56,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:56,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:42:56,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:56,413 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 13:42:56,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305348780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:56,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:56,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 13:42:56,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552256058] [2021-06-05 13:42:56,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:56,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:56,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:56,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:56,414 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 13:42:56,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:56,585 INFO L93 Difference]: Finished difference Result 776 states and 2043 transitions. [2021-06-05 13:42:56,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:42:56,585 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 13:42:56,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:56,587 INFO L225 Difference]: With dead ends: 776 [2021-06-05 13:42:56,587 INFO L226 Difference]: Without dead ends: 759 [2021-06-05 13:42:56,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 256.8ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:42:56,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-06-05 13:42:56,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 594. [2021-06-05 13:42:56,593 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 13:42:56,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1744 transitions. [2021-06-05 13:42:56,593 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1744 transitions. Word has length 19 [2021-06-05 13:42:56,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:56,594 INFO L482 AbstractCegarLoop]: Abstraction has 594 states and 1744 transitions. [2021-06-05 13:42:56,594 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 13:42:56,594 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1744 transitions. [2021-06-05 13:42:56,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:42:56,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:56,594 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:56,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 13:42:56,795 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:56,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:56,795 INFO L82 PathProgramCache]: Analyzing trace with hash 492569411, now seen corresponding path program 88 times [2021-06-05 13:42:56,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:56,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129017054] [2021-06-05 13:42:56,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:56,879 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 13:42:56,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:56,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129017054] [2021-06-05 13:42:56,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129017054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:56,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652191921] [2021-06-05 13:42:56,879 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 13:42:56,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:42:56,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:56,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:42:56,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:56,978 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 13:42:56,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652191921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:56,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:56,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 13:42:56,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826432634] [2021-06-05 13:42:56,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:56,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:56,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:56,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:56,979 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 13:42:57,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:57,130 INFO L93 Difference]: Finished difference Result 774 states and 2026 transitions. [2021-06-05 13:42:57,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:42:57,130 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 13:42:57,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:57,131 INFO L225 Difference]: With dead ends: 774 [2021-06-05 13:42:57,131 INFO L226 Difference]: Without dead ends: 756 [2021-06-05 13:42:57,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 156.0ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:42:57,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-06-05 13:42:57,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 583. [2021-06-05 13:42:57,137 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 13:42:57,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1701 transitions. [2021-06-05 13:42:57,138 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1701 transitions. Word has length 19 [2021-06-05 13:42:57,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:57,138 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1701 transitions. [2021-06-05 13:42:57,138 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 13:42:57,138 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1701 transitions. [2021-06-05 13:42:57,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:42:57,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:57,139 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:57,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 13:42:57,353 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:57,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:57,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1586724417, now seen corresponding path program 89 times [2021-06-05 13:42:57,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:57,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92582317] [2021-06-05 13:42:57,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:57,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:57,421 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 13:42:57,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:57,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92582317] [2021-06-05 13:42:57,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92582317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:57,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818851054] [2021-06-05 13:42:57,421 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 13:42:57,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:42:57,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:57,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:42:57,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:57,530 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 13:42:57,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818851054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:57,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:57,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 13:42:57,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221995286] [2021-06-05 13:42:57,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:57,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:57,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:57,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:57,531 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 13:42:57,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:57,717 INFO L93 Difference]: Finished difference Result 744 states and 1952 transitions. [2021-06-05 13:42:57,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:42:57,717 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 13:42:57,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:57,719 INFO L225 Difference]: With dead ends: 744 [2021-06-05 13:42:57,719 INFO L226 Difference]: Without dead ends: 722 [2021-06-05 13:42:57,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 169.1ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:42:57,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-06-05 13:42:57,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 580. [2021-06-05 13:42:57,724 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 13:42:57,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1688 transitions. [2021-06-05 13:42:57,725 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1688 transitions. Word has length 19 [2021-06-05 13:42:57,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:57,725 INFO L482 AbstractCegarLoop]: Abstraction has 580 states and 1688 transitions. [2021-06-05 13:42:57,725 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 13:42:57,725 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1688 transitions. [2021-06-05 13:42:57,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:42:57,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:57,726 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:57,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:57,941 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:57,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:57,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1620323645, now seen corresponding path program 90 times [2021-06-05 13:42:57,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:57,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122400735] [2021-06-05 13:42:57,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:58,006 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 13:42:58,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:58,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122400735] [2021-06-05 13:42:58,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122400735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:58,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400905870] [2021-06-05 13:42:58,007 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 13:42:58,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:42:58,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:58,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:42:58,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:58,123 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 13:42:58,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400905870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:58,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:58,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 13:42:58,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660813202] [2021-06-05 13:42:58,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:58,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:58,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:58,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:58,124 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 13:42:58,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:58,294 INFO L93 Difference]: Finished difference Result 695 states and 1864 transitions. [2021-06-05 13:42:58,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:42:58,294 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 13:42:58,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:58,295 INFO L225 Difference]: With dead ends: 695 [2021-06-05 13:42:58,295 INFO L226 Difference]: Without dead ends: 688 [2021-06-05 13:42:58,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:42:58,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-06-05 13:42:58,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 582. [2021-06-05 13:42:58,300 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 13:42:58,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1691 transitions. [2021-06-05 13:42:58,301 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1691 transitions. Word has length 19 [2021-06-05 13:42:58,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:58,301 INFO L482 AbstractCegarLoop]: Abstraction has 582 states and 1691 transitions. [2021-06-05 13:42:58,301 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 13:42:58,301 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1691 transitions. [2021-06-05 13:42:58,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:42:58,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:58,302 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:58,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:58,517 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:58,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:58,518 INFO L82 PathProgramCache]: Analyzing trace with hash -592690923, now seen corresponding path program 91 times [2021-06-05 13:42:58,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:58,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590410012] [2021-06-05 13:42:58,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:58,577 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 13:42:58,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:58,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590410012] [2021-06-05 13:42:58,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590410012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:58,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232360078] [2021-06-05 13:42:58,577 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 13:42:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:58,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:42:58,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:58,684 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 13:42:58,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232360078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:58,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:58,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 13:42:58,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699440855] [2021-06-05 13:42:58,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:58,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:58,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:58,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:58,685 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 13:42:58,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:58,794 INFO L93 Difference]: Finished difference Result 647 states and 1795 transitions. [2021-06-05 13:42:58,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:42:58,794 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 13:42:58,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:58,795 INFO L225 Difference]: With dead ends: 647 [2021-06-05 13:42:58,795 INFO L226 Difference]: Without dead ends: 634 [2021-06-05 13:42:58,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:42:58,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-06-05 13:42:58,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 577. [2021-06-05 13:42:58,800 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 13:42:58,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1675 transitions. [2021-06-05 13:42:58,801 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1675 transitions. Word has length 19 [2021-06-05 13:42:58,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:58,801 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1675 transitions. [2021-06-05 13:42:58,801 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 13:42:58,801 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1675 transitions. [2021-06-05 13:42:58,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:42:58,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:58,801 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:59,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 13:42:59,017 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:59,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:59,017 INFO L82 PathProgramCache]: Analyzing trace with hash -520276101, now seen corresponding path program 92 times [2021-06-05 13:42:59,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:59,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830850408] [2021-06-05 13:42:59,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:59,090 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 13:42:59,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:59,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830850408] [2021-06-05 13:42:59,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830850408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:59,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945757299] [2021-06-05 13:42:59,090 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) [2021-06-05 13:42:59,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:42:59,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:59,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:42:59,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:59,187 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 13:42:59,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945757299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:59,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:59,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 13:42:59,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569025159] [2021-06-05 13:42:59,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:59,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:59,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:59,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:59,188 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 13:42:59,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:59,360 INFO L93 Difference]: Finished difference Result 798 states and 2119 transitions. [2021-06-05 13:42:59,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:42:59,360 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 13:42:59,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:59,361 INFO L225 Difference]: With dead ends: 798 [2021-06-05 13:42:59,361 INFO L226 Difference]: Without dead ends: 781 [2021-06-05 13:42:59,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 154.1ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:42:59,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-06-05 13:42:59,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 632. [2021-06-05 13:42:59,368 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 13:42:59,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 1851 transitions. [2021-06-05 13:42:59,369 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 1851 transitions. Word has length 19 [2021-06-05 13:42:59,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:59,369 INFO L482 AbstractCegarLoop]: Abstraction has 632 states and 1851 transitions. [2021-06-05 13:42:59,369 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 13:42:59,369 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 1851 transitions. [2021-06-05 13:42:59,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:42:59,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:59,370 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:42:59,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:42:59,577 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:42:59,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:42:59,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1094426623, now seen corresponding path program 93 times [2021-06-05 13:42:59,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:42:59,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663977071] [2021-06-05 13:42:59,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:42:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:42:59,648 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 13:42:59,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:42:59,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663977071] [2021-06-05 13:42:59,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663977071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:59,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302610879] [2021-06-05 13:42:59,648 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 13:42:59,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:42:59,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:42:59,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:42:59,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:42:59,748 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 13:42:59,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302610879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:42:59,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:42:59,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 13:42:59,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516155524] [2021-06-05 13:42:59,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:42:59,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:42:59,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:42:59,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:42:59,749 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 13:42:59,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:42:59,944 INFO L93 Difference]: Finished difference Result 796 states and 2104 transitions. [2021-06-05 13:42:59,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:42:59,945 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 13:42:59,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:42:59,946 INFO L225 Difference]: With dead ends: 796 [2021-06-05 13:42:59,946 INFO L226 Difference]: Without dead ends: 780 [2021-06-05 13:42:59,946 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 13:42:59,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-06-05 13:42:59,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 621. [2021-06-05 13:42:59,951 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 13:42:59,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1812 transitions. [2021-06-05 13:42:59,952 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1812 transitions. Word has length 19 [2021-06-05 13:42:59,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:42:59,953 INFO L482 AbstractCegarLoop]: Abstraction has 621 states and 1812 transitions. [2021-06-05 13:42:59,953 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 13:42:59,953 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1812 transitions. [2021-06-05 13:42:59,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:42:59,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:42:59,953 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:00,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:00,166 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:00,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:00,166 INFO L82 PathProgramCache]: Analyzing trace with hash -984867205, now seen corresponding path program 94 times [2021-06-05 13:43:00,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:00,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827862314] [2021-06-05 13:43:00,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:00,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:00,235 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 13:43:00,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:00,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827862314] [2021-06-05 13:43:00,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827862314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:00,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063189427] [2021-06-05 13:43:00,235 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 13:43:00,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:00,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:00,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:43:00,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:00,334 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 13:43:00,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063189427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:00,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:00,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 13:43:00,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129021867] [2021-06-05 13:43:00,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:43:00,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:00,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:43:00,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:43:00,335 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 13:43:00,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:00,528 INFO L93 Difference]: Finished difference Result 809 states and 2103 transitions. [2021-06-05 13:43:00,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:43:00,529 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 13:43:00,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:00,530 INFO L225 Difference]: With dead ends: 809 [2021-06-05 13:43:00,530 INFO L226 Difference]: Without dead ends: 791 [2021-06-05 13:43:00,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 167.3ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:43:00,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-06-05 13:43:00,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 614. [2021-06-05 13:43:00,536 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 13:43:00,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1785 transitions. [2021-06-05 13:43:00,537 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1785 transitions. Word has length 19 [2021-06-05 13:43:00,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:00,537 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 1785 transitions. [2021-06-05 13:43:00,537 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 13:43:00,537 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1785 transitions. [2021-06-05 13:43:00,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:43:00,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:00,538 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:00,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 13:43:00,738 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:00,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:00,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1018466433, now seen corresponding path program 95 times [2021-06-05 13:43:00,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:00,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217512563] [2021-06-05 13:43:00,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:00,815 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 13:43:00,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:00,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217512563] [2021-06-05 13:43:00,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217512563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:00,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640478450] [2021-06-05 13:43:00,816 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 13:43:00,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:43:00,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:00,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:43:00,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:00,931 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 13:43:00,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640478450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:00,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:00,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 13:43:00,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162202148] [2021-06-05 13:43:00,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:43:00,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:00,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:43:00,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:43:00,932 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 13:43:01,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:01,158 INFO L93 Difference]: Finished difference Result 764 states and 2018 transitions. [2021-06-05 13:43:01,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:43:01,158 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 13:43:01,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:01,159 INFO L225 Difference]: With dead ends: 764 [2021-06-05 13:43:01,159 INFO L226 Difference]: Without dead ends: 744 [2021-06-05 13:43:01,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 212.0ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:43:01,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-06-05 13:43:01,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 607. [2021-06-05 13:43:01,164 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 13:43:01,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1766 transitions. [2021-06-05 13:43:01,165 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1766 transitions. Word has length 19 [2021-06-05 13:43:01,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:01,165 INFO L482 AbstractCegarLoop]: Abstraction has 607 states and 1766 transitions. [2021-06-05 13:43:01,165 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 13:43:01,166 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1766 transitions. [2021-06-05 13:43:01,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:43:01,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:01,166 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:01,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:01,367 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:01,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:01,367 INFO L82 PathProgramCache]: Analyzing trace with hash -2060042501, now seen corresponding path program 96 times [2021-06-05 13:43:01,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:01,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588026297] [2021-06-05 13:43:01,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:01,451 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 13:43:01,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:01,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588026297] [2021-06-05 13:43:01,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588026297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:01,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667448791] [2021-06-05 13:43:01,451 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 13:43:01,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:43:01,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:01,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:43:01,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:01,547 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 13:43:01,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667448791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:01,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:01,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 13:43:01,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692925995] [2021-06-05 13:43:01,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:43:01,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:01,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:43:01,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:43:01,548 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 13:43:01,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:01,736 INFO L93 Difference]: Finished difference Result 713 states and 1927 transitions. [2021-06-05 13:43:01,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:43:01,736 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 13:43:01,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:01,737 INFO L225 Difference]: With dead ends: 713 [2021-06-05 13:43:01,737 INFO L226 Difference]: Without dead ends: 706 [2021-06-05 13:43:01,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 168.2ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:43:01,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-06-05 13:43:01,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 615. [2021-06-05 13:43:01,743 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 13:43:01,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 1778 transitions. [2021-06-05 13:43:01,744 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 1778 transitions. Word has length 19 [2021-06-05 13:43:01,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:01,744 INFO L482 AbstractCegarLoop]: Abstraction has 615 states and 1778 transitions. [2021-06-05 13:43:01,744 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 13:43:01,744 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 1778 transitions. [2021-06-05 13:43:01,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:43:01,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:01,744 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:01,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-06-05 13:43:01,945 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:01,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:01,945 INFO L82 PathProgramCache]: Analyzing trace with hash 323509763, now seen corresponding path program 97 times [2021-06-05 13:43:01,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:01,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954453403] [2021-06-05 13:43:01,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:02,019 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 13:43:02,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:02,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954453403] [2021-06-05 13:43:02,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954453403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:02,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545257246] [2021-06-05 13:43:02,019 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 13:43:02,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:02,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:43:02,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:02,124 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 13:43:02,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545257246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:02,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:02,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 13:43:02,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77359626] [2021-06-05 13:43:02,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:43:02,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:02,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:43:02,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:43:02,125 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 13:43:02,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:02,244 INFO L93 Difference]: Finished difference Result 753 states and 2034 transitions. [2021-06-05 13:43:02,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:43:02,245 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 13:43:02,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:02,245 INFO L225 Difference]: With dead ends: 753 [2021-06-05 13:43:02,245 INFO L226 Difference]: Without dead ends: 743 [2021-06-05 13:43:02,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:02,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-06-05 13:43:02,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 627. [2021-06-05 13:43:02,251 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 13:43:02,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1819 transitions. [2021-06-05 13:43:02,252 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1819 transitions. Word has length 19 [2021-06-05 13:43:02,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:02,252 INFO L482 AbstractCegarLoop]: Abstraction has 627 states and 1819 transitions. [2021-06-05 13:43:02,252 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 13:43:02,252 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1819 transitions. [2021-06-05 13:43:02,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:43:02,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:02,253 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:02,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:02,468 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:02,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:02,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1938212487, now seen corresponding path program 98 times [2021-06-05 13:43:02,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:02,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356826142] [2021-06-05 13:43:02,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:02,537 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 13:43:02,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:02,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356826142] [2021-06-05 13:43:02,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356826142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:02,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208124247] [2021-06-05 13:43:02,538 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 13:43:02,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:02,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:02,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:43:02,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:02,643 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 13:43:02,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208124247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:02,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:02,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 13:43:02,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900398804] [2021-06-05 13:43:02,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:43:02,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:02,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:43:02,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:43:02,644 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 13:43:02,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:02,768 INFO L93 Difference]: Finished difference Result 735 states and 2000 transitions. [2021-06-05 13:43:02,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:43:02,768 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 13:43:02,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:02,769 INFO L225 Difference]: With dead ends: 735 [2021-06-05 13:43:02,769 INFO L226 Difference]: Without dead ends: 728 [2021-06-05 13:43:02,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:02,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-06-05 13:43:02,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 625. [2021-06-05 13:43:02,774 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 13:43:02,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1811 transitions. [2021-06-05 13:43:02,775 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1811 transitions. Word has length 19 [2021-06-05 13:43:02,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:02,775 INFO L482 AbstractCegarLoop]: Abstraction has 625 states and 1811 transitions. [2021-06-05 13:43:02,775 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 13:43:02,775 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1811 transitions. [2021-06-05 13:43:02,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:43:02,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:02,776 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:02,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 13:43:02,992 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:02,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:02,993 INFO L82 PathProgramCache]: Analyzing trace with hash 894964569, now seen corresponding path program 99 times [2021-06-05 13:43:02,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:02,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516606313] [2021-06-05 13:43:02,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:03,055 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 13:43:03,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:03,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516606313] [2021-06-05 13:43:03,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516606313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:03,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698989283] [2021-06-05 13:43:03,056 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 13:43:03,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:43:03,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:03,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:43:03,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:03,164 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 13:43:03,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698989283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:03,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:03,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 13:43:03,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184022092] [2021-06-05 13:43:03,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:43:03,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:03,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:43:03,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:43:03,165 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 13:43:03,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:03,288 INFO L93 Difference]: Finished difference Result 709 states and 1948 transitions. [2021-06-05 13:43:03,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:43:03,289 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 13:43:03,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:03,290 INFO L225 Difference]: With dead ends: 709 [2021-06-05 13:43:03,290 INFO L226 Difference]: Without dead ends: 702 [2021-06-05 13:43:03,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 144.0ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:03,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-06-05 13:43:03,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 624. [2021-06-05 13:43:03,295 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 13:43:03,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1808 transitions. [2021-06-05 13:43:03,296 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1808 transitions. Word has length 19 [2021-06-05 13:43:03,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:03,296 INFO L482 AbstractCegarLoop]: Abstraction has 624 states and 1808 transitions. [2021-06-05 13:43:03,296 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 13:43:03,296 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1808 transitions. [2021-06-05 13:43:03,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:43:03,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:03,297 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:03,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:03,501 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:03,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:03,501 INFO L82 PathProgramCache]: Analyzing trace with hash 711067771, now seen corresponding path program 100 times [2021-06-05 13:43:03,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:03,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27269117] [2021-06-05 13:43:03,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:03,573 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 13:43:03,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:03,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27269117] [2021-06-05 13:43:03,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27269117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:03,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993284157] [2021-06-05 13:43:03,574 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 13:43:03,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:03,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:03,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:43:03,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:03,672 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 13:43:03,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993284157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:03,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:03,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 13:43:03,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267769927] [2021-06-05 13:43:03,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:43:03,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:03,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:43:03,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:43:03,673 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 13:43:03,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:03,811 INFO L93 Difference]: Finished difference Result 809 states and 2160 transitions. [2021-06-05 13:43:03,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:43:03,811 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 13:43:03,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:03,812 INFO L225 Difference]: With dead ends: 809 [2021-06-05 13:43:03,812 INFO L226 Difference]: Without dead ends: 799 [2021-06-05 13:43:03,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:03,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-06-05 13:43:03,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 644. [2021-06-05 13:43:03,818 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 13:43:03,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1876 transitions. [2021-06-05 13:43:03,819 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1876 transitions. Word has length 19 [2021-06-05 13:43:03,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:03,819 INFO L482 AbstractCegarLoop]: Abstraction has 644 states and 1876 transitions. [2021-06-05 13:43:03,819 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 13:43:03,819 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1876 transitions. [2021-06-05 13:43:03,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:43:03,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:03,820 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:04,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:04,022 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:04,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:04,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1969196801, now seen corresponding path program 101 times [2021-06-05 13:43:04,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:04,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368548726] [2021-06-05 13:43:04,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:04,095 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 13:43:04,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:04,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368548726] [2021-06-05 13:43:04,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368548726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:04,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975587154] [2021-06-05 13:43:04,095 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 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 13:43:04,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:43:04,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:04,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:43:04,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:04,203 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 13:43:04,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975587154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:04,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:04,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 13:43:04,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232430474] [2021-06-05 13:43:04,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:43:04,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:04,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:43:04,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:43:04,204 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 13:43:04,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:04,331 INFO L93 Difference]: Finished difference Result 793 states and 2130 transitions. [2021-06-05 13:43:04,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:43:04,331 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 13:43:04,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:04,332 INFO L225 Difference]: With dead ends: 793 [2021-06-05 13:43:04,332 INFO L226 Difference]: Without dead ends: 786 [2021-06-05 13:43:04,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 131.0ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:04,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-06-05 13:43:04,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 640. [2021-06-05 13:43:04,338 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 13:43:04,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1862 transitions. [2021-06-05 13:43:04,339 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1862 transitions. Word has length 19 [2021-06-05 13:43:04,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:04,339 INFO L482 AbstractCegarLoop]: Abstraction has 640 states and 1862 transitions. [2021-06-05 13:43:04,339 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 13:43:04,339 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1862 transitions. [2021-06-05 13:43:04,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:43:04,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:04,340 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:04,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-06-05 13:43:04,540 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:04,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:04,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1282522577, now seen corresponding path program 102 times [2021-06-05 13:43:04,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:04,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738051042] [2021-06-05 13:43:04,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:04,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:04,620 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 13:43:04,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:04,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738051042] [2021-06-05 13:43:04,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738051042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:04,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464489638] [2021-06-05 13:43:04,620 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 13:43:04,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:43:04,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:04,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:43:04,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:04,726 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 13:43:04,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464489638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:04,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:04,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 13:43:04,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588325570] [2021-06-05 13:43:04,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:43:04,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:04,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:43:04,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:43:04,727 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 13:43:04,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:04,870 INFO L93 Difference]: Finished difference Result 788 states and 2114 transitions. [2021-06-05 13:43:04,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:43:04,871 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 13:43:04,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:04,872 INFO L225 Difference]: With dead ends: 788 [2021-06-05 13:43:04,872 INFO L226 Difference]: Without dead ends: 775 [2021-06-05 13:43:04,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 153.4ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:43:04,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-06-05 13:43:04,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 638. [2021-06-05 13:43:04,878 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 13:43:04,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1853 transitions. [2021-06-05 13:43:04,879 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1853 transitions. Word has length 19 [2021-06-05 13:43:04,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:04,879 INFO L482 AbstractCegarLoop]: Abstraction has 638 states and 1853 transitions. [2021-06-05 13:43:04,879 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 13:43:04,879 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1853 transitions. [2021-06-05 13:43:04,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:43:04,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:04,880 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:05,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 13:43:05,096 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:05,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:05,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1817752379, now seen corresponding path program 103 times [2021-06-05 13:43:05,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:05,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225883198] [2021-06-05 13:43:05,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:05,162 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 13:43:05,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:05,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225883198] [2021-06-05 13:43:05,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225883198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:05,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316103868] [2021-06-05 13:43:05,163 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) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:05,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:05,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:43:05,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:05,259 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 13:43:05,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316103868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:05,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:05,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 13:43:05,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761782494] [2021-06-05 13:43:05,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:43:05,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:05,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:43:05,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:43:05,260 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 13:43:05,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:05,417 INFO L93 Difference]: Finished difference Result 748 states and 2031 transitions. [2021-06-05 13:43:05,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:43:05,417 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 13:43:05,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:05,418 INFO L225 Difference]: With dead ends: 748 [2021-06-05 13:43:05,418 INFO L226 Difference]: Without dead ends: 741 [2021-06-05 13:43:05,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:43:05,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-06-05 13:43:05,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 636. [2021-06-05 13:43:05,423 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 13:43:05,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1847 transitions. [2021-06-05 13:43:05,424 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1847 transitions. Word has length 19 [2021-06-05 13:43:05,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:05,425 INFO L482 AbstractCegarLoop]: Abstraction has 636 states and 1847 transitions. [2021-06-05 13:43:05,425 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 13:43:05,425 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1847 transitions. [2021-06-05 13:43:05,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:05,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:05,428 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:05,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:05,637 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:05,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:05,637 INFO L82 PathProgramCache]: Analyzing trace with hash -2039469541, now seen corresponding path program 104 times [2021-06-05 13:43:05,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:05,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593743020] [2021-06-05 13:43:05,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:05,671 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 13:43:05,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:05,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593743020] [2021-06-05 13:43:05,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593743020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:05,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184425553] [2021-06-05 13:43:05,671 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 13:43:05,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:05,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:05,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:05,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:05,746 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 13:43:05,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184425553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:05,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:05,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 13:43:05,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003483039] [2021-06-05 13:43:05,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:43:05,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:05,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:43:05,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:43:05,747 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 13:43:05,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:05,826 INFO L93 Difference]: Finished difference Result 972 states and 2745 transitions. [2021-06-05 13:43:05,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:43:05,826 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 13:43:05,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:05,827 INFO L225 Difference]: With dead ends: 972 [2021-06-05 13:43:05,827 INFO L226 Difference]: Without dead ends: 955 [2021-06-05 13:43:05,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:43:05,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-06-05 13:43:05,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 631. [2021-06-05 13:43:05,840 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 13:43:05,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1837 transitions. [2021-06-05 13:43:05,841 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1837 transitions. Word has length 20 [2021-06-05 13:43:05,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:05,841 INFO L482 AbstractCegarLoop]: Abstraction has 631 states and 1837 transitions. [2021-06-05 13:43:05,841 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 13:43:05,841 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1837 transitions. [2021-06-05 13:43:05,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:05,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:05,842 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:06,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:06,042 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:06,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:06,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1555544053, now seen corresponding path program 105 times [2021-06-05 13:43:06,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:06,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512605455] [2021-06-05 13:43:06,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:06,081 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 13:43:06,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:06,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512605455] [2021-06-05 13:43:06,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512605455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:06,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359708388] [2021-06-05 13:43:06,082 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 13:43:06,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:43:06,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:06,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:06,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:06,166 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 13:43:06,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359708388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:06,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:06,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 13:43:06,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882215226] [2021-06-05 13:43:06,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:43:06,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:06,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:43:06,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:43:06,167 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 13:43:06,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:06,289 INFO L93 Difference]: Finished difference Result 996 states and 2821 transitions. [2021-06-05 13:43:06,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:43:06,290 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 13:43:06,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:06,291 INFO L225 Difference]: With dead ends: 996 [2021-06-05 13:43:06,291 INFO L226 Difference]: Without dead ends: 996 [2021-06-05 13:43:06,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:43:06,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-06-05 13:43:06,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 650. [2021-06-05 13:43:06,298 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 13:43:06,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1894 transitions. [2021-06-05 13:43:06,299 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1894 transitions. Word has length 20 [2021-06-05 13:43:06,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:06,299 INFO L482 AbstractCegarLoop]: Abstraction has 650 states and 1894 transitions. [2021-06-05 13:43:06,299 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 13:43:06,299 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1894 transitions. [2021-06-05 13:43:06,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:06,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:06,301 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:06,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:06,516 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:06,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:06,517 INFO L82 PathProgramCache]: Analyzing trace with hash 946430223, now seen corresponding path program 106 times [2021-06-05 13:43:06,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:06,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80103135] [2021-06-05 13:43:06,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:06,550 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 13:43:06,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:06,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80103135] [2021-06-05 13:43:06,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80103135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:06,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282562737] [2021-06-05 13:43:06,551 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 13:43:06,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:06,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:06,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:06,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:06,635 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 13:43:06,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282562737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:06,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:06,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 13:43:06,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502483787] [2021-06-05 13:43:06,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:06,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:06,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:06,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:06,636 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 13:43:06,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:06,905 INFO L93 Difference]: Finished difference Result 1332 states and 3575 transitions. [2021-06-05 13:43:06,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 13:43:06,905 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 13:43:06,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:06,906 INFO L225 Difference]: With dead ends: 1332 [2021-06-05 13:43:06,906 INFO L226 Difference]: Without dead ends: 1326 [2021-06-05 13:43:06,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 230.4ms TimeCoverageRelationStatistics Valid=424, Invalid=836, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 13:43:06,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-06-05 13:43:06,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 787. [2021-06-05 13:43:06,915 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 13:43:06,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2363 transitions. [2021-06-05 13:43:06,916 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2363 transitions. Word has length 20 [2021-06-05 13:43:06,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:06,916 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 2363 transitions. [2021-06-05 13:43:06,916 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 13:43:06,916 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2363 transitions. [2021-06-05 13:43:06,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:06,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:06,917 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:07,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-06-05 13:43:07,118 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:07,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:07,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1517885029, now seen corresponding path program 107 times [2021-06-05 13:43:07,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:07,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12139417] [2021-06-05 13:43:07,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:07,156 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 13:43:07,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:07,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12139417] [2021-06-05 13:43:07,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12139417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:07,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907651505] [2021-06-05 13:43:07,156 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 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 13:43:07,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:43:07,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:07,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:07,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:07,241 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 13:43:07,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907651505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:07,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:07,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 13:43:07,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668811691] [2021-06-05 13:43:07,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:07,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:07,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:07,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:07,242 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 13:43:07,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:07,576 INFO L93 Difference]: Finished difference Result 1321 states and 3538 transitions. [2021-06-05 13:43:07,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 13:43:07,577 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 13:43:07,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:07,578 INFO L225 Difference]: With dead ends: 1321 [2021-06-05 13:43:07,578 INFO L226 Difference]: Without dead ends: 1315 [2021-06-05 13:43:07,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 274.2ms TimeCoverageRelationStatistics Valid=487, Invalid=1405, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 13:43:07,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-06-05 13:43:07,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 729. [2021-06-05 13:43:07,587 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 13:43:07,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2145 transitions. [2021-06-05 13:43:07,588 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2145 transitions. Word has length 20 [2021-06-05 13:43:07,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:07,588 INFO L482 AbstractCegarLoop]: Abstraction has 729 states and 2145 transitions. [2021-06-05 13:43:07,588 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 13:43:07,588 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2145 transitions. [2021-06-05 13:43:07,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:07,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:07,589 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:07,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 13:43:07,805 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:07,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:07,805 INFO L82 PathProgramCache]: Analyzing trace with hash -413686517, now seen corresponding path program 108 times [2021-06-05 13:43:07,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:07,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797354588] [2021-06-05 13:43:07,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:07,837 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 13:43:07,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:07,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797354588] [2021-06-05 13:43:07,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797354588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:07,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448349898] [2021-06-05 13:43:07,837 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 13:43:07,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:43:07,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:07,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:07,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:07,922 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 13:43:07,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448349898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:07,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:07,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 13:43:07,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147879078] [2021-06-05 13:43:07,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:07,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:07,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:07,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:07,923 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 13:43:08,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:08,256 INFO L93 Difference]: Finished difference Result 1177 states and 3102 transitions. [2021-06-05 13:43:08,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 13:43:08,256 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 13:43:08,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:08,257 INFO L225 Difference]: With dead ends: 1177 [2021-06-05 13:43:08,257 INFO L226 Difference]: Without dead ends: 1177 [2021-06-05 13:43:08,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 265.7ms TimeCoverageRelationStatistics Valid=597, Invalid=1043, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:43:08,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-06-05 13:43:08,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 767. [2021-06-05 13:43:08,265 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 13:43:08,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2276 transitions. [2021-06-05 13:43:08,266 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2276 transitions. Word has length 20 [2021-06-05 13:43:08,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:08,266 INFO L482 AbstractCegarLoop]: Abstraction has 767 states and 2276 transitions. [2021-06-05 13:43:08,266 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 13:43:08,266 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2276 transitions. [2021-06-05 13:43:08,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:08,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:08,267 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:08,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 13:43:08,468 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:08,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:08,468 INFO L82 PathProgramCache]: Analyzing trace with hash -878277621, now seen corresponding path program 109 times [2021-06-05 13:43:08,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:08,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105281974] [2021-06-05 13:43:08,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:08,501 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 13:43:08,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:08,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105281974] [2021-06-05 13:43:08,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105281974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:08,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102245361] [2021-06-05 13:43:08,502 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 13:43:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:08,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:08,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:08,582 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 13:43:08,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102245361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:08,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:08,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 13:43:08,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759644117] [2021-06-05 13:43:08,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:08,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:08,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:08,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:08,582 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 13:43:08,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:08,927 INFO L93 Difference]: Finished difference Result 1009 states and 2756 transitions. [2021-06-05 13:43:08,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 13:43:08,927 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 13:43:08,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:08,928 INFO L225 Difference]: With dead ends: 1009 [2021-06-05 13:43:08,928 INFO L226 Difference]: Without dead ends: 1005 [2021-06-05 13:43:08,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 282.7ms TimeCoverageRelationStatistics Valid=781, Invalid=1475, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 13:43:08,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-06-05 13:43:08,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 699. [2021-06-05 13:43:08,935 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 13:43:08,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2044 transitions. [2021-06-05 13:43:08,936 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2044 transitions. Word has length 20 [2021-06-05 13:43:08,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:08,936 INFO L482 AbstractCegarLoop]: Abstraction has 699 states and 2044 transitions. [2021-06-05 13:43:08,936 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 13:43:08,936 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2044 transitions. [2021-06-05 13:43:08,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:08,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:08,937 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:09,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 13:43:09,138 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:09,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:09,138 INFO L82 PathProgramCache]: Analyzing trace with hash 2053114831, now seen corresponding path program 110 times [2021-06-05 13:43:09,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:09,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614607119] [2021-06-05 13:43:09,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:09,171 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 13:43:09,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:09,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614607119] [2021-06-05 13:43:09,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614607119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:09,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853696129] [2021-06-05 13:43:09,172 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 13:43:09,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:09,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:09,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:09,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:09,257 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 13:43:09,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853696129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:09,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:09,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 13:43:09,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001301814] [2021-06-05 13:43:09,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:09,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:09,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:09,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:09,258 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 13:43:09,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:09,543 INFO L93 Difference]: Finished difference Result 1249 states and 3308 transitions. [2021-06-05 13:43:09,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 13:43:09,543 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 13:43:09,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:09,544 INFO L225 Difference]: With dead ends: 1249 [2021-06-05 13:43:09,544 INFO L226 Difference]: Without dead ends: 1240 [2021-06-05 13:43:09,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 240.3ms TimeCoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 13:43:09,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-06-05 13:43:09,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 724. [2021-06-05 13:43:09,552 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 13:43:09,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 2123 transitions. [2021-06-05 13:43:09,553 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 2123 transitions. Word has length 20 [2021-06-05 13:43:09,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:09,554 INFO L482 AbstractCegarLoop]: Abstraction has 724 states and 2123 transitions. [2021-06-05 13:43:09,554 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 13:43:09,554 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 2123 transitions. [2021-06-05 13:43:09,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:09,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:09,554 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:09,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 13:43:09,755 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:09,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:09,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1465369509, now seen corresponding path program 111 times [2021-06-05 13:43:09,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:09,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888258594] [2021-06-05 13:43:09,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:09,794 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 13:43:09,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:09,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888258594] [2021-06-05 13:43:09,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888258594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:09,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573767466] [2021-06-05 13:43:09,794 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 13:43:09,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:43:09,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:09,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:09,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:09,912 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 13:43:09,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573767466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:09,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:09,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 13:43:09,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228690164] [2021-06-05 13:43:09,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:09,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:09,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:09,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:09,912 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 13:43:10,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:10,200 INFO L93 Difference]: Finished difference Result 1262 states and 3371 transitions. [2021-06-05 13:43:10,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 13:43:10,200 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 13:43:10,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:10,201 INFO L225 Difference]: With dead ends: 1262 [2021-06-05 13:43:10,201 INFO L226 Difference]: Without dead ends: 1250 [2021-06-05 13:43:10,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 250.7ms TimeCoverageRelationStatistics Valid=374, Invalid=1186, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 13:43:10,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-06-05 13:43:10,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 734. [2021-06-05 13:43:10,209 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 13:43:10,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2145 transitions. [2021-06-05 13:43:10,210 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2145 transitions. Word has length 20 [2021-06-05 13:43:10,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:10,210 INFO L482 AbstractCegarLoop]: Abstraction has 734 states and 2145 transitions. [2021-06-05 13:43:10,210 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 13:43:10,210 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2145 transitions. [2021-06-05 13:43:10,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:10,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:10,211 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:10,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:10,411 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:10,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:10,411 INFO L82 PathProgramCache]: Analyzing trace with hash 425133711, now seen corresponding path program 112 times [2021-06-05 13:43:10,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:10,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936951172] [2021-06-05 13:43:10,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:10,448 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 13:43:10,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:10,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936951172] [2021-06-05 13:43:10,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936951172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:10,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962435147] [2021-06-05 13:43:10,448 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 13:43:10,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:10,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:10,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:10,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:10,531 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 13:43:10,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962435147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:10,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:10,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 13:43:10,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434501531] [2021-06-05 13:43:10,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:10,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:10,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:10,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:10,532 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 13:43:10,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:10,760 INFO L93 Difference]: Finished difference Result 1109 states and 3026 transitions. [2021-06-05 13:43:10,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:43:10,760 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 13:43:10,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:10,761 INFO L225 Difference]: With dead ends: 1109 [2021-06-05 13:43:10,761 INFO L226 Difference]: Without dead ends: 1097 [2021-06-05 13:43:10,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:43:10,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-06-05 13:43:10,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 734. [2021-06-05 13:43:10,768 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 13:43:10,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2142 transitions. [2021-06-05 13:43:10,769 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2142 transitions. Word has length 20 [2021-06-05 13:43:10,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:10,769 INFO L482 AbstractCegarLoop]: Abstraction has 734 states and 2142 transitions. [2021-06-05 13:43:10,769 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 13:43:10,769 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2142 transitions. [2021-06-05 13:43:10,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:10,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:10,770 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:10,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-06-05 13:43:10,985 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:10,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:10,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1225555761, now seen corresponding path program 113 times [2021-06-05 13:43:10,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:10,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565443373] [2021-06-05 13:43:10,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:11,015 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 13:43:11,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:11,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565443373] [2021-06-05 13:43:11,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565443373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:11,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416581027] [2021-06-05 13:43:11,015 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 13:43:11,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:43:11,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:11,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:11,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:11,103 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 13:43:11,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416581027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:11,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:11,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 13:43:11,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412009730] [2021-06-05 13:43:11,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:11,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:11,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:11,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:11,104 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 13:43:11,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:11,408 INFO L93 Difference]: Finished difference Result 1207 states and 3153 transitions. [2021-06-05 13:43:11,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 13:43:11,408 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 13:43:11,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:11,409 INFO L225 Difference]: With dead ends: 1207 [2021-06-05 13:43:11,409 INFO L226 Difference]: Without dead ends: 1201 [2021-06-05 13:43:11,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 245.5ms TimeCoverageRelationStatistics Valid=545, Invalid=937, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 13:43:11,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-06-05 13:43:11,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 788. [2021-06-05 13:43:11,417 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 13:43:11,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2320 transitions. [2021-06-05 13:43:11,418 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2320 transitions. Word has length 20 [2021-06-05 13:43:11,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:11,418 INFO L482 AbstractCegarLoop]: Abstraction has 788 states and 2320 transitions. [2021-06-05 13:43:11,418 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 13:43:11,419 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2320 transitions. [2021-06-05 13:43:11,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:11,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:11,419 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:11,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:11,634 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:11,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:11,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1690146865, now seen corresponding path program 114 times [2021-06-05 13:43:11,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:11,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277730144] [2021-06-05 13:43:11,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:11,664 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 13:43:11,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:11,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277730144] [2021-06-05 13:43:11,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277730144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:11,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059460444] [2021-06-05 13:43:11,664 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 13:43:11,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:43:11,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:11,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:11,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:11,752 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 13:43:11,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059460444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:11,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:11,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 13:43:11,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256715092] [2021-06-05 13:43:11,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:11,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:11,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:11,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:11,753 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 13:43:12,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:12,119 INFO L93 Difference]: Finished difference Result 1081 states and 2841 transitions. [2021-06-05 13:43:12,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 13:43:12,119 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 13:43:12,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:12,120 INFO L225 Difference]: With dead ends: 1081 [2021-06-05 13:43:12,120 INFO L226 Difference]: Without dead ends: 1075 [2021-06-05 13:43:12,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 311.3ms TimeCoverageRelationStatistics Valid=782, Invalid=1570, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 13:43:12,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-06-05 13:43:12,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 726. [2021-06-05 13:43:12,127 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 13:43:12,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2111 transitions. [2021-06-05 13:43:12,129 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2111 transitions. Word has length 20 [2021-06-05 13:43:12,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:12,129 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 2111 transitions. [2021-06-05 13:43:12,129 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 13:43:12,129 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2111 transitions. [2021-06-05 13:43:12,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:12,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:12,129 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:12,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 13:43:12,333 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:12,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:12,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1723746093, now seen corresponding path program 115 times [2021-06-05 13:43:12,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:12,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29470366] [2021-06-05 13:43:12,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:12,366 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 13:43:12,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:12,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29470366] [2021-06-05 13:43:12,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29470366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:12,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396281915] [2021-06-05 13:43:12,367 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 13:43:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:12,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:12,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:12,456 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 13:43:12,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396281915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:12,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:12,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 13:43:12,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70011375] [2021-06-05 13:43:12,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:12,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:12,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:12,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:12,457 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 13:43:12,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:12,796 INFO L93 Difference]: Finished difference Result 974 states and 2590 transitions. [2021-06-05 13:43:12,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 13:43:12,796 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 13:43:12,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:12,797 INFO L225 Difference]: With dead ends: 974 [2021-06-05 13:43:12,797 INFO L226 Difference]: Without dead ends: 966 [2021-06-05 13:43:12,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 297.2ms TimeCoverageRelationStatistics Valid=776, Invalid=1674, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 13:43:12,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-06-05 13:43:12,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 737. [2021-06-05 13:43:12,804 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 13:43:12,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2147 transitions. [2021-06-05 13:43:12,805 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2147 transitions. Word has length 20 [2021-06-05 13:43:12,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:12,805 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 2147 transitions. [2021-06-05 13:43:12,805 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 13:43:12,805 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2147 transitions. [2021-06-05 13:43:12,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:12,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:12,806 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:13,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-06-05 13:43:13,006 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:13,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:13,007 INFO L82 PathProgramCache]: Analyzing trace with hash -623698549, now seen corresponding path program 116 times [2021-06-05 13:43:13,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:13,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498171970] [2021-06-05 13:43:13,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:13,032 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 13:43:13,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:13,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498171970] [2021-06-05 13:43:13,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498171970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:13,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444250005] [2021-06-05 13:43:13,032 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 13:43:13,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:13,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:13,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:13,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:13,129 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 13:43:13,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444250005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:13,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:13,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 13:43:13,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589923710] [2021-06-05 13:43:13,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:13,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:13,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:13,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:13,130 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 13:43:13,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:13,412 INFO L93 Difference]: Finished difference Result 1269 states and 3314 transitions. [2021-06-05 13:43:13,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:43:13,412 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 13:43:13,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:13,413 INFO L225 Difference]: With dead ends: 1269 [2021-06-05 13:43:13,413 INFO L226 Difference]: Without dead ends: 1260 [2021-06-05 13:43:13,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 231.1ms TimeCoverageRelationStatistics Valid=495, Invalid=837, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:43:13,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2021-06-05 13:43:13,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 824. [2021-06-05 13:43:13,433 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 13:43:13,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2420 transitions. [2021-06-05 13:43:13,434 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2420 transitions. Word has length 20 [2021-06-05 13:43:13,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:13,434 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 2420 transitions. [2021-06-05 13:43:13,434 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 13:43:13,434 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2420 transitions. [2021-06-05 13:43:13,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:13,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:13,435 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:13,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:13,635 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:13,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:13,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1088289653, now seen corresponding path program 117 times [2021-06-05 13:43:13,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:13,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949842614] [2021-06-05 13:43:13,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:13,661 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 13:43:13,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:13,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949842614] [2021-06-05 13:43:13,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949842614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:13,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258545063] [2021-06-05 13:43:13,661 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 13:43:13,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:43:13,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:13,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:13,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:13,751 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 13:43:13,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258545063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:13,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:13,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 13:43:13,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732562575] [2021-06-05 13:43:13,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:13,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:13,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:13,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:13,751 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 13:43:14,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:14,143 INFO L93 Difference]: Finished difference Result 1150 states and 3032 transitions. [2021-06-05 13:43:14,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 13:43:14,143 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 13:43:14,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:14,144 INFO L225 Difference]: With dead ends: 1150 [2021-06-05 13:43:14,144 INFO L226 Difference]: Without dead ends: 1144 [2021-06-05 13:43:14,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 342.9ms TimeCoverageRelationStatistics Valid=855, Invalid=1797, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 13:43:14,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-06-05 13:43:14,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 795. [2021-06-05 13:43:14,152 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 13:43:14,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2316 transitions. [2021-06-05 13:43:14,153 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2316 transitions. Word has length 20 [2021-06-05 13:43:14,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:14,153 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 2316 transitions. [2021-06-05 13:43:14,153 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 13:43:14,153 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2316 transitions. [2021-06-05 13:43:14,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:14,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:14,154 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:14,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:14,355 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:14,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:14,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1121888881, now seen corresponding path program 118 times [2021-06-05 13:43:14,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:14,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138010622] [2021-06-05 13:43:14,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:14,383 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 13:43:14,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:14,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138010622] [2021-06-05 13:43:14,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138010622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:14,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579058755] [2021-06-05 13:43:14,383 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:14,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:14,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:14,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:14,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:14,475 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 13:43:14,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579058755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:14,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:14,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 13:43:14,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004203063] [2021-06-05 13:43:14,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:14,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:14,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:14,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:14,476 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 13:43:14,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:14,848 INFO L93 Difference]: Finished difference Result 1155 states and 3056 transitions. [2021-06-05 13:43:14,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 13:43:14,849 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 13:43:14,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:14,850 INFO L225 Difference]: With dead ends: 1155 [2021-06-05 13:43:14,850 INFO L226 Difference]: Without dead ends: 1147 [2021-06-05 13:43:14,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 326.9ms TimeCoverageRelationStatistics Valid=776, Invalid=1774, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 13:43:14,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-06-05 13:43:14,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 789. [2021-06-05 13:43:14,857 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 13:43:14,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 2308 transitions. [2021-06-05 13:43:14,859 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 2308 transitions. Word has length 20 [2021-06-05 13:43:14,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:14,859 INFO L482 AbstractCegarLoop]: Abstraction has 789 states and 2308 transitions. [2021-06-05 13:43:14,859 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 13:43:14,859 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 2308 transitions. [2021-06-05 13:43:14,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:14,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:14,860 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:15,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 13:43:15,060 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:15,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:15,060 INFO L82 PathProgramCache]: Analyzing trace with hash 2131502347, now seen corresponding path program 119 times [2021-06-05 13:43:15,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:15,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756416189] [2021-06-05 13:43:15,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:15,095 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 13:43:15,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:15,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756416189] [2021-06-05 13:43:15,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756416189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:15,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827505537] [2021-06-05 13:43:15,095 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 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 13:43:15,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:43:15,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:15,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:15,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:15,204 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 13:43:15,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827505537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:15,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:15,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 13:43:15,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550340198] [2021-06-05 13:43:15,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:43:15,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:15,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:43:15,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:43:15,205 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 13:43:15,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:15,549 INFO L93 Difference]: Finished difference Result 1081 states and 2905 transitions. [2021-06-05 13:43:15,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 13:43:15,550 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 13:43:15,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:15,551 INFO L225 Difference]: With dead ends: 1081 [2021-06-05 13:43:15,551 INFO L226 Difference]: Without dead ends: 1069 [2021-06-05 13:43:15,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 313.5ms TimeCoverageRelationStatistics Valid=746, Invalid=1804, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 13:43:15,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-06-05 13:43:15,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 809. [2021-06-05 13:43:15,558 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 13:43:15,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2367 transitions. [2021-06-05 13:43:15,559 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2367 transitions. Word has length 20 [2021-06-05 13:43:15,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:15,559 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 2367 transitions. [2021-06-05 13:43:15,559 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 13:43:15,559 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2367 transitions. [2021-06-05 13:43:15,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:15,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:15,560 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:15,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:15,761 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:15,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:15,761 INFO L82 PathProgramCache]: Analyzing trace with hash 854005839, now seen corresponding path program 120 times [2021-06-05 13:43:15,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:15,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833487334] [2021-06-05 13:43:15,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:15,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:15,784 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 13:43:15,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:15,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833487334] [2021-06-05 13:43:15,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833487334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:15,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684299070] [2021-06-05 13:43:15,785 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 13:43:15,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:43:15,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:15,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:15,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:15,889 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 13:43:15,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684299070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:15,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:15,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-05 13:43:15,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262747140] [2021-06-05 13:43:15,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:15,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:15,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:15,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:15,890 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 13:43:16,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:16,164 INFO L93 Difference]: Finished difference Result 1520 states and 4046 transitions. [2021-06-05 13:43:16,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:43:16,165 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 13:43:16,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:16,166 INFO L225 Difference]: With dead ends: 1520 [2021-06-05 13:43:16,166 INFO L226 Difference]: Without dead ends: 1514 [2021-06-05 13:43:16,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 243.7ms TimeCoverageRelationStatistics Valid=491, Invalid=841, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:43:16,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2021-06-05 13:43:16,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 989. [2021-06-05 13:43:16,177 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 13:43:16,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 2954 transitions. [2021-06-05 13:43:16,178 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 2954 transitions. Word has length 20 [2021-06-05 13:43:16,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:16,178 INFO L482 AbstractCegarLoop]: Abstraction has 989 states and 2954 transitions. [2021-06-05 13:43:16,178 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 13:43:16,178 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 2954 transitions. [2021-06-05 13:43:16,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:16,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:16,179 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:16,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 13:43:16,381 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:16,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:16,382 INFO L82 PathProgramCache]: Analyzing trace with hash 389414735, now seen corresponding path program 121 times [2021-06-05 13:43:16,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:16,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503503095] [2021-06-05 13:43:16,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:16,405 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 13:43:16,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:16,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503503095] [2021-06-05 13:43:16,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503503095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:16,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665020076] [2021-06-05 13:43:16,405 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 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 13:43:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:16,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:16,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:16,500 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 13:43:16,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665020076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:16,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:16,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-05 13:43:16,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725217458] [2021-06-05 13:43:16,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:16,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:16,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:16,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:16,501 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 13:43:16,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:16,960 INFO L93 Difference]: Finished difference Result 1383 states and 3716 transitions. [2021-06-05 13:43:16,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 13:43:16,960 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 13:43:16,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:16,961 INFO L225 Difference]: With dead ends: 1383 [2021-06-05 13:43:16,961 INFO L226 Difference]: Without dead ends: 1379 [2021-06-05 13:43:16,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 404.9ms TimeCoverageRelationStatistics Valid=988, Invalid=2204, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 13:43:16,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2021-06-05 13:43:16,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 956. [2021-06-05 13:43:16,971 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 13:43:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 2833 transitions. [2021-06-05 13:43:16,972 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 2833 transitions. Word has length 20 [2021-06-05 13:43:16,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:16,972 INFO L482 AbstractCegarLoop]: Abstraction has 956 states and 2833 transitions. [2021-06-05 13:43:16,972 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 13:43:16,973 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 2833 transitions. [2021-06-05 13:43:16,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:16,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:16,973 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:17,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 13:43:17,174 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:17,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:17,174 INFO L82 PathProgramCache]: Analyzing trace with hash 355815507, now seen corresponding path program 122 times [2021-06-05 13:43:17,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:17,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202162727] [2021-06-05 13:43:17,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:17,202 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 13:43:17,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:17,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202162727] [2021-06-05 13:43:17,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202162727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:17,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178280092] [2021-06-05 13:43:17,202 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 13:43:17,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:17,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:17,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:17,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:17,352 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 13:43:17,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178280092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:17,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:17,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 13:43:17,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402357624] [2021-06-05 13:43:17,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:17,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:17,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:17,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:17,353 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 13:43:17,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:17,750 INFO L93 Difference]: Finished difference Result 1412 states and 3831 transitions. [2021-06-05 13:43:17,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 13:43:17,750 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 13:43:17,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:17,751 INFO L225 Difference]: With dead ends: 1412 [2021-06-05 13:43:17,751 INFO L226 Difference]: Without dead ends: 1404 [2021-06-05 13:43:17,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 361.2ms TimeCoverageRelationStatistics Valid=842, Invalid=2020, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 13:43:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-06-05 13:43:17,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1024. [2021-06-05 13:43:17,762 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 13:43:17,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 3067 transitions. [2021-06-05 13:43:17,763 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 3067 transitions. Word has length 20 [2021-06-05 13:43:17,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:17,763 INFO L482 AbstractCegarLoop]: Abstraction has 1024 states and 3067 transitions. [2021-06-05 13:43:17,763 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 13:43:17,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 3067 transitions. [2021-06-05 13:43:17,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:17,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:17,764 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:17,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 13:43:17,965 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:17,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:17,965 INFO L82 PathProgramCache]: Analyzing trace with hash -685760561, now seen corresponding path program 123 times [2021-06-05 13:43:17,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:17,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88534114] [2021-06-05 13:43:17,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:17,997 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 13:43:17,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:17,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88534114] [2021-06-05 13:43:17,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88534114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:17,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203341654] [2021-06-05 13:43:17,997 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 13:43:18,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:43:18,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:18,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:18,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:18,107 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 13:43:18,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203341654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:18,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:18,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 13:43:18,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627433298] [2021-06-05 13:43:18,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:43:18,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:18,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:43:18,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:43:18,108 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 13:43:18,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:18,529 INFO L93 Difference]: Finished difference Result 1501 states and 4138 transitions. [2021-06-05 13:43:18,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 13:43:18,529 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 13:43:18,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:18,531 INFO L225 Difference]: With dead ends: 1501 [2021-06-05 13:43:18,531 INFO L226 Difference]: Without dead ends: 1489 [2021-06-05 13:43:18,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 370.9ms TimeCoverageRelationStatistics Valid=743, Invalid=1909, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 13:43:18,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2021-06-05 13:43:18,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1112. [2021-06-05 13:43:18,543 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 13:43:18,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3364 transitions. [2021-06-05 13:43:18,544 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3364 transitions. Word has length 20 [2021-06-05 13:43:18,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:18,544 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 3364 transitions. [2021-06-05 13:43:18,544 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 13:43:18,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3364 transitions. [2021-06-05 13:43:18,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:18,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:18,546 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:18,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:18,761 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:18,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:18,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1385119699, now seen corresponding path program 124 times [2021-06-05 13:43:18,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:18,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457521834] [2021-06-05 13:43:18,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:18,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:18,797 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 13:43:18,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:18,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457521834] [2021-06-05 13:43:18,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457521834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:18,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10292902] [2021-06-05 13:43:18,798 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 13:43:18,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:18,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:18,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:18,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:18,902 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 13:43:18,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10292902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:18,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:18,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 13:43:18,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244177551] [2021-06-05 13:43:18,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:43:18,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:18,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:43:18,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:43:18,903 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 13:43:19,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:19,244 INFO L93 Difference]: Finished difference Result 1470 states and 4125 transitions. [2021-06-05 13:43:19,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 13:43:19,244 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 13:43:19,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:19,245 INFO L225 Difference]: With dead ends: 1470 [2021-06-05 13:43:19,245 INFO L226 Difference]: Without dead ends: 1454 [2021-06-05 13:43:19,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 321.3ms TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 13:43:19,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-06-05 13:43:19,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1142. [2021-06-05 13:43:19,256 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 13:43:19,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3455 transitions. [2021-06-05 13:43:19,258 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3455 transitions. Word has length 20 [2021-06-05 13:43:19,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:19,258 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 3455 transitions. [2021-06-05 13:43:19,258 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 13:43:19,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3455 transitions. [2021-06-05 13:43:19,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:19,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:19,259 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:19,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-05 13:43:19,459 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:19,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:19,460 INFO L82 PathProgramCache]: Analyzing trace with hash 693043539, now seen corresponding path program 125 times [2021-06-05 13:43:19,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:19,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423037479] [2021-06-05 13:43:19,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:19,494 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 13:43:19,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:19,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423037479] [2021-06-05 13:43:19,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423037479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:19,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625254366] [2021-06-05 13:43:19,495 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 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 13:43:19,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:43:19,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:19,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:19,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:19,574 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 13:43:19,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625254366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:19,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:19,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 13:43:19,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047217620] [2021-06-05 13:43:19,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:43:19,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:19,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:43:19,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:43:19,575 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 13:43:19,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:19,657 INFO L93 Difference]: Finished difference Result 1462 states and 4279 transitions. [2021-06-05 13:43:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:43:19,657 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 13:43:19,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:19,659 INFO L225 Difference]: With dead ends: 1462 [2021-06-05 13:43:19,659 INFO L226 Difference]: Without dead ends: 1462 [2021-06-05 13:43:19,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:43:19,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-06-05 13:43:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1165. [2021-06-05 13:43:19,670 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 13:43:19,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3527 transitions. [2021-06-05 13:43:19,671 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3527 transitions. Word has length 20 [2021-06-05 13:43:19,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:19,671 INFO L482 AbstractCegarLoop]: Abstraction has 1165 states and 3527 transitions. [2021-06-05 13:43:19,671 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 13:43:19,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3527 transitions. [2021-06-05 13:43:19,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:19,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:19,673 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:19,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 13:43:19,888 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:19,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:19,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1067009401, now seen corresponding path program 126 times [2021-06-05 13:43:19,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:19,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997910509] [2021-06-05 13:43:19,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:19,922 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 13:43:19,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:19,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997910509] [2021-06-05 13:43:19,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997910509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:19,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382840379] [2021-06-05 13:43:19,923 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 13:43:19,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:43:19,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:19,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:19,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:20,003 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 13:43:20,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382840379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:20,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:20,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 13:43:20,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638168878] [2021-06-05 13:43:20,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:20,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:20,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:20,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:20,004 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 13:43:20,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:20,136 INFO L93 Difference]: Finished difference Result 1324 states and 3884 transitions. [2021-06-05 13:43:20,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:43:20,137 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 13:43:20,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:20,138 INFO L225 Difference]: With dead ends: 1324 [2021-06-05 13:43:20,138 INFO L226 Difference]: Without dead ends: 1324 [2021-06-05 13:43:20,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:43:20,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-06-05 13:43:20,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1168. [2021-06-05 13:43:20,148 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 13:43:20,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3536 transitions. [2021-06-05 13:43:20,149 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3536 transitions. Word has length 20 [2021-06-05 13:43:20,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:20,150 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 3536 transitions. [2021-06-05 13:43:20,150 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 13:43:20,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3536 transitions. [2021-06-05 13:43:20,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:20,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:20,151 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:20,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:20,351 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:20,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:20,352 INFO L82 PathProgramCache]: Analyzing trace with hash -181211121, now seen corresponding path program 127 times [2021-06-05 13:43:20,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:20,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975697485] [2021-06-05 13:43:20,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:20,386 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 13:43:20,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:20,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975697485] [2021-06-05 13:43:20,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975697485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:20,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057542193] [2021-06-05 13:43:20,386 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) [2021-06-05 13:43:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:20,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:20,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:20,479 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 13:43:20,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057542193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:20,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:20,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 13:43:20,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656537934] [2021-06-05 13:43:20,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:20,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:20,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:20,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:20,480 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 13:43:20,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:20,656 INFO L93 Difference]: Finished difference Result 1344 states and 3926 transitions. [2021-06-05 13:43:20,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:43:20,656 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 13:43:20,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:20,658 INFO L225 Difference]: With dead ends: 1344 [2021-06-05 13:43:20,658 INFO L226 Difference]: Without dead ends: 1344 [2021-06-05 13:43:20,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 161.3ms TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:43:20,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-06-05 13:43:20,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1174. [2021-06-05 13:43:20,667 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 13:43:20,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 3554 transitions. [2021-06-05 13:43:20,669 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 3554 transitions. Word has length 20 [2021-06-05 13:43:20,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:20,669 INFO L482 AbstractCegarLoop]: Abstraction has 1174 states and 3554 transitions. [2021-06-05 13:43:20,669 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 13:43:20,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 3554 transitions. [2021-06-05 13:43:20,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:20,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:20,670 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:20,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:20,882 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:20,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:20,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1925572999, now seen corresponding path program 128 times [2021-06-05 13:43:20,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:20,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111596457] [2021-06-05 13:43:20,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:20,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:20,914 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 13:43:20,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:20,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111596457] [2021-06-05 13:43:20,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111596457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:20,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948661761] [2021-06-05 13:43:20,915 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 13:43:20,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:20,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:20,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:20,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:20,991 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 13:43:20,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948661761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:20,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:20,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 13:43:20,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005659033] [2021-06-05 13:43:20,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:20,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:20,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:20,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:20,992 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 13:43:21,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:21,271 INFO L93 Difference]: Finished difference Result 1444 states and 4134 transitions. [2021-06-05 13:43:21,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:43:21,272 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 13:43:21,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:21,273 INFO L225 Difference]: With dead ends: 1444 [2021-06-05 13:43:21,273 INFO L226 Difference]: Without dead ends: 1444 [2021-06-05 13:43:21,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 214.6ms TimeCoverageRelationStatistics Valid=459, Invalid=873, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:43:21,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-06-05 13:43:21,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1198. [2021-06-05 13:43:21,283 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 13:43:21,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3631 transitions. [2021-06-05 13:43:21,285 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3631 transitions. Word has length 20 [2021-06-05 13:43:21,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:21,285 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 3631 transitions. [2021-06-05 13:43:21,285 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 13:43:21,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3631 transitions. [2021-06-05 13:43:21,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:21,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:21,286 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:21,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:21,487 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:21,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:21,487 INFO L82 PathProgramCache]: Analyzing trace with hash -223223537, now seen corresponding path program 129 times [2021-06-05 13:43:21,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:21,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131242506] [2021-06-05 13:43:21,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:21,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:21,521 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 13:43:21,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:21,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131242506] [2021-06-05 13:43:21,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131242506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:21,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322554363] [2021-06-05 13:43:21,522 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 13:43:21,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:43:21,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:21,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:21,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:21,614 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 13:43:21,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322554363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:21,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:21,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 13:43:21,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447247889] [2021-06-05 13:43:21,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:21,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:21,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:21,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:21,615 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 13:43:21,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:21,952 INFO L93 Difference]: Finished difference Result 1560 states and 4362 transitions. [2021-06-05 13:43:21,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 13:43:21,953 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 13:43:21,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:21,954 INFO L225 Difference]: With dead ends: 1560 [2021-06-05 13:43:21,954 INFO L226 Difference]: Without dead ends: 1560 [2021-06-05 13:43:21,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 267.4ms TimeCoverageRelationStatistics Valid=597, Invalid=1043, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:43:21,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-06-05 13:43:21,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1182. [2021-06-05 13:43:21,965 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 13:43:21,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 3589 transitions. [2021-06-05 13:43:21,967 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 3589 transitions. Word has length 20 [2021-06-05 13:43:21,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:21,967 INFO L482 AbstractCegarLoop]: Abstraction has 1182 states and 3589 transitions. [2021-06-05 13:43:21,967 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 13:43:21,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 3589 transitions. [2021-06-05 13:43:21,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:21,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:21,968 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:22,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 13:43:22,168 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:22,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:22,169 INFO L82 PathProgramCache]: Analyzing trace with hash 348231269, now seen corresponding path program 130 times [2021-06-05 13:43:22,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:22,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492498626] [2021-06-05 13:43:22,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:22,202 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 13:43:22,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:22,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492498626] [2021-06-05 13:43:22,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492498626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:22,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769697503] [2021-06-05 13:43:22,202 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 13:43:22,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:22,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:22,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:22,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:22,297 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 13:43:22,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769697503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:22,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:22,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 13:43:22,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409256667] [2021-06-05 13:43:22,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:22,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:22,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:22,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:22,297 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 13:43:22,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:22,642 INFO L93 Difference]: Finished difference Result 1402 states and 3999 transitions. [2021-06-05 13:43:22,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 13:43:22,643 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 13:43:22,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:22,644 INFO L225 Difference]: With dead ends: 1402 [2021-06-05 13:43:22,644 INFO L226 Difference]: Without dead ends: 1396 [2021-06-05 13:43:22,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 297.0ms TimeCoverageRelationStatistics Valid=781, Invalid=1475, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 13:43:22,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-06-05 13:43:22,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1135. [2021-06-05 13:43:22,658 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 13:43:22,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 3430 transitions. [2021-06-05 13:43:22,660 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 3430 transitions. Word has length 20 [2021-06-05 13:43:22,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:22,660 INFO L482 AbstractCegarLoop]: Abstraction has 1135 states and 3430 transitions. [2021-06-05 13:43:22,660 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 13:43:22,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 3430 transitions. [2021-06-05 13:43:22,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:22,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:22,661 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:22,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 13:43:22,862 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:22,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:22,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1583340277, now seen corresponding path program 131 times [2021-06-05 13:43:22,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:22,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291239336] [2021-06-05 13:43:22,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:22,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:22,895 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 13:43:22,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:22,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291239336] [2021-06-05 13:43:22,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291239336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:22,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574323060] [2021-06-05 13:43:22,895 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 13:43:22,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:43:22,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:22,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:22,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:22,979 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 13:43:22,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574323060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:22,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:22,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 13:43:22,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074921040] [2021-06-05 13:43:22,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:22,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:22,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:22,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:22,980 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 13:43:23,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:23,252 INFO L93 Difference]: Finished difference Result 1746 states and 4918 transitions. [2021-06-05 13:43:23,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 13:43:23,252 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 13:43:23,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:23,254 INFO L225 Difference]: With dead ends: 1746 [2021-06-05 13:43:23,254 INFO L226 Difference]: Without dead ends: 1737 [2021-06-05 13:43:23,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 225.3ms TimeCoverageRelationStatistics Valid=424, Invalid=836, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 13:43:23,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2021-06-05 13:43:23,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1314. [2021-06-05 13:43:23,267 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 13:43:23,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 4026 transitions. [2021-06-05 13:43:23,269 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 4026 transitions. Word has length 20 [2021-06-05 13:43:23,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:23,269 INFO L482 AbstractCegarLoop]: Abstraction has 1314 states and 4026 transitions. [2021-06-05 13:43:23,270 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 13:43:23,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 4026 transitions. [2021-06-05 13:43:23,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:23,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:23,271 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:23,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 13:43:23,481 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:23,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:23,481 INFO L82 PathProgramCache]: Analyzing trace with hash -2047931381, now seen corresponding path program 132 times [2021-06-05 13:43:23,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:23,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801376341] [2021-06-05 13:43:23,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:23,514 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 13:43:23,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:23,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801376341] [2021-06-05 13:43:23,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801376341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:23,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070381340] [2021-06-05 13:43:23,514 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 13:43:23,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:43:23,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:23,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:23,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:23,615 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 13:43:23,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070381340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:23,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:23,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 13:43:23,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025603560] [2021-06-05 13:43:23,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:23,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:23,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:23,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:23,616 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 13:43:23,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:23,944 INFO L93 Difference]: Finished difference Result 1701 states and 4827 transitions. [2021-06-05 13:43:23,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 13:43:23,944 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 13:43:23,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:23,945 INFO L225 Difference]: With dead ends: 1701 [2021-06-05 13:43:23,946 INFO L226 Difference]: Without dead ends: 1697 [2021-06-05 13:43:23,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 277.0ms TimeCoverageRelationStatistics Valid=487, Invalid=1405, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 13:43:23,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2021-06-05 13:43:23,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1246. [2021-06-05 13:43:23,957 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 13:43:23,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 3774 transitions. [2021-06-05 13:43:23,959 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 3774 transitions. Word has length 20 [2021-06-05 13:43:23,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:23,959 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 3774 transitions. [2021-06-05 13:43:23,959 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 13:43:23,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 3774 transitions. [2021-06-05 13:43:23,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:23,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:23,961 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:24,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 13:43:24,161 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:24,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:24,161 INFO L82 PathProgramCache]: Analyzing trace with hash -2081530609, now seen corresponding path program 133 times [2021-06-05 13:43:24,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:24,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918865692] [2021-06-05 13:43:24,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:24,195 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 13:43:24,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:24,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918865692] [2021-06-05 13:43:24,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918865692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:24,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542023194] [2021-06-05 13:43:24,195 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 13:43:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:24,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:24,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:24,276 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 13:43:24,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542023194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:24,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:24,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 13:43:24,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37088216] [2021-06-05 13:43:24,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:24,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:24,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:24,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:24,277 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 13:43:24,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:24,558 INFO L93 Difference]: Finished difference Result 1682 states and 4760 transitions. [2021-06-05 13:43:24,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 13:43:24,558 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 13:43:24,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:24,560 INFO L225 Difference]: With dead ends: 1682 [2021-06-05 13:43:24,560 INFO L226 Difference]: Without dead ends: 1674 [2021-06-05 13:43:24,560 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 13:43:24,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2021-06-05 13:43:24,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1299. [2021-06-05 13:43:24,573 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 13:43:24,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3938 transitions. [2021-06-05 13:43:24,575 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3938 transitions. Word has length 20 [2021-06-05 13:43:24,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:24,575 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 3938 transitions. [2021-06-05 13:43:24,575 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 13:43:24,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3938 transitions. [2021-06-05 13:43:24,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:24,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:24,576 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:24,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:24,777 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:24,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:24,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1171860619, now seen corresponding path program 134 times [2021-06-05 13:43:24,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:24,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290235632] [2021-06-05 13:43:24,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:24,811 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 13:43:24,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:24,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290235632] [2021-06-05 13:43:24,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290235632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:24,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869786784] [2021-06-05 13:43:24,811 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 13:43:24,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:24,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:24,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:24,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:24,892 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 13:43:24,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869786784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:24,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:24,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 13:43:24,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12664993] [2021-06-05 13:43:24,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:24,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:24,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:24,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:24,893 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 13:43:25,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:25,150 INFO L93 Difference]: Finished difference Result 1724 states and 4914 transitions. [2021-06-05 13:43:25,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 13:43:25,150 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 13:43:25,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:25,151 INFO L225 Difference]: With dead ends: 1724 [2021-06-05 13:43:25,152 INFO L226 Difference]: Without dead ends: 1712 [2021-06-05 13:43:25,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 230.4ms TimeCoverageRelationStatistics Valid=374, Invalid=1186, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 13:43:25,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-06-05 13:43:25,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1318. [2021-06-05 13:43:25,163 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 13:43:25,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3986 transitions. [2021-06-05 13:43:25,165 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3986 transitions. Word has length 20 [2021-06-05 13:43:25,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:25,165 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 3986 transitions. [2021-06-05 13:43:25,165 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 13:43:25,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3986 transitions. [2021-06-05 13:43:25,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:25,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:25,167 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:25,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-06-05 13:43:25,367 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:25,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:25,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1052226417, now seen corresponding path program 135 times [2021-06-05 13:43:25,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:25,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868180787] [2021-06-05 13:43:25,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:25,402 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 13:43:25,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:25,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868180787] [2021-06-05 13:43:25,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868180787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:25,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973465953] [2021-06-05 13:43:25,402 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 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 13:43:25,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:43:25,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:25,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:25,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:25,485 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 13:43:25,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973465953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:25,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:25,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 13:43:25,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671852354] [2021-06-05 13:43:25,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:25,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:25,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:25,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:25,486 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 13:43:25,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:25,673 INFO L93 Difference]: Finished difference Result 1567 states and 4524 transitions. [2021-06-05 13:43:25,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:43:25,673 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 13:43:25,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:25,674 INFO L225 Difference]: With dead ends: 1567 [2021-06-05 13:43:25,674 INFO L226 Difference]: Without dead ends: 1559 [2021-06-05 13:43:25,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 193.4ms TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:43:25,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-06-05 13:43:25,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1318. [2021-06-05 13:43:25,686 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 13:43:25,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3982 transitions. [2021-06-05 13:43:25,688 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3982 transitions. Word has length 20 [2021-06-05 13:43:25,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:25,688 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 3982 transitions. [2021-06-05 13:43:25,688 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 13:43:25,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3982 transitions. [2021-06-05 13:43:25,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:25,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:25,690 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:25,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-05 13:43:25,897 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:25,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:25,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1727648907, now seen corresponding path program 136 times [2021-06-05 13:43:25,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:25,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471557097] [2021-06-05 13:43:25,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:25,932 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 13:43:25,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:25,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471557097] [2021-06-05 13:43:25,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471557097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:25,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015260907] [2021-06-05 13:43:25,933 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 13:43:25,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:25,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:25,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:25,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:26,009 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 13:43:26,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015260907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:26,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:26,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 13:43:26,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120398367] [2021-06-05 13:43:26,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:43:26,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:26,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:43:26,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:43:26,009 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 13:43:26,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:26,086 INFO L93 Difference]: Finished difference Result 1464 states and 4346 transitions. [2021-06-05 13:43:26,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:43:26,086 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 13:43:26,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:26,088 INFO L225 Difference]: With dead ends: 1464 [2021-06-05 13:43:26,088 INFO L226 Difference]: Without dead ends: 1454 [2021-06-05 13:43:26,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:43:26,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-06-05 13:43:26,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1318. [2021-06-05 13:43:26,105 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 13:43:26,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3981 transitions. [2021-06-05 13:43:26,107 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3981 transitions. Word has length 20 [2021-06-05 13:43:26,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:26,107 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 3981 transitions. [2021-06-05 13:43:26,107 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 13:43:26,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3981 transitions. [2021-06-05 13:43:26,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:26,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:26,108 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:26,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 13:43:26,309 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:26,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:26,309 INFO L82 PathProgramCache]: Analyzing trace with hash 205924307, now seen corresponding path program 137 times [2021-06-05 13:43:26,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:26,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145388049] [2021-06-05 13:43:26,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:26,346 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 13:43:26,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:26,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145388049] [2021-06-05 13:43:26,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145388049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:26,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249498262] [2021-06-05 13:43:26,346 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 13:43:26,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:43:26,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:26,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:26,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:26,432 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 13:43:26,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249498262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:26,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:26,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 13:43:26,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203603136] [2021-06-05 13:43:26,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:26,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:26,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:26,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:26,433 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 13:43:26,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:26,717 INFO L93 Difference]: Finished difference Result 1488 states and 4332 transitions. [2021-06-05 13:43:26,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:43:26,718 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 13:43:26,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:26,719 INFO L225 Difference]: With dead ends: 1488 [2021-06-05 13:43:26,719 INFO L226 Difference]: Without dead ends: 1488 [2021-06-05 13:43:26,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 241.5ms TimeCoverageRelationStatistics Valid=470, Invalid=1012, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 13:43:26,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2021-06-05 13:43:26,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1320. [2021-06-05 13:43:26,731 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 13:43:26,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 3987 transitions. [2021-06-05 13:43:26,733 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 3987 transitions. Word has length 20 [2021-06-05 13:43:26,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:26,733 INFO L482 AbstractCegarLoop]: Abstraction has 1320 states and 3987 transitions. [2021-06-05 13:43:26,733 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 13:43:26,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 3987 transitions. [2021-06-05 13:43:26,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:26,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:26,734 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:26,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:26,934 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:26,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:26,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1513301805, now seen corresponding path program 138 times [2021-06-05 13:43:26,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:26,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543686833] [2021-06-05 13:43:26,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:26,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:26,964 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 13:43:26,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:26,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543686833] [2021-06-05 13:43:26,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543686833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:26,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343157630] [2021-06-05 13:43:26,965 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 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 13:43:26,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:43:26,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:26,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:26,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:27,049 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 13:43:27,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343157630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:27,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:27,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 13:43:27,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005604325] [2021-06-05 13:43:27,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:27,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:27,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:27,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:27,050 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 13:43:27,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:27,297 INFO L93 Difference]: Finished difference Result 1578 states and 4543 transitions. [2021-06-05 13:43:27,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:43:27,297 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 13:43:27,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:27,298 INFO L225 Difference]: With dead ends: 1578 [2021-06-05 13:43:27,298 INFO L226 Difference]: Without dead ends: 1572 [2021-06-05 13:43:27,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=359, Invalid=763, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:43:27,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-06-05 13:43:27,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1335. [2021-06-05 13:43:27,310 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 13:43:27,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 4029 transitions. [2021-06-05 13:43:27,312 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 4029 transitions. Word has length 20 [2021-06-05 13:43:27,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:27,312 INFO L482 AbstractCegarLoop]: Abstraction has 1335 states and 4029 transitions. [2021-06-05 13:43:27,312 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 13:43:27,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 4029 transitions. [2021-06-05 13:43:27,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:27,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:27,314 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:27,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:27,515 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:27,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:27,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1479280595, now seen corresponding path program 139 times [2021-06-05 13:43:27,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:27,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135827754] [2021-06-05 13:43:27,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:27,549 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 13:43:27,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:27,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135827754] [2021-06-05 13:43:27,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135827754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:27,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228339846] [2021-06-05 13:43:27,550 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 13:43:27,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:27,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:27,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:27,633 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 13:43:27,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228339846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:27,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:27,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 13:43:27,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59303994] [2021-06-05 13:43:27,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:27,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:27,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:27,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:27,634 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 13:43:27,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:27,867 INFO L93 Difference]: Finished difference Result 1610 states and 4633 transitions. [2021-06-05 13:43:27,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:43:27,867 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 13:43:27,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:27,869 INFO L225 Difference]: With dead ends: 1610 [2021-06-05 13:43:27,869 INFO L226 Difference]: Without dead ends: 1606 [2021-06-05 13:43:27,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 201.8ms TimeCoverageRelationStatistics Valid=383, Invalid=739, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:43:27,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2021-06-05 13:43:27,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1324. [2021-06-05 13:43:27,880 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 13:43:27,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 3994 transitions. [2021-06-05 13:43:27,882 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 3994 transitions. Word has length 20 [2021-06-05 13:43:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:27,882 INFO L482 AbstractCegarLoop]: Abstraction has 1324 states and 3994 transitions. [2021-06-05 13:43:27,882 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 13:43:27,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 3994 transitions. [2021-06-05 13:43:27,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:27,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:27,883 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:28,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable242 [2021-06-05 13:43:28,084 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:28,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:28,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1437268179, now seen corresponding path program 140 times [2021-06-05 13:43:28,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:28,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719295942] [2021-06-05 13:43:28,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:28,113 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 13:43:28,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:28,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719295942] [2021-06-05 13:43:28,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719295942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:28,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155215434] [2021-06-05 13:43:28,113 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 13:43:28,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:28,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:28,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:28,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:28,195 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 13:43:28,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155215434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:28,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:28,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 13:43:28,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965694638] [2021-06-05 13:43:28,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:28,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:28,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:28,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:28,196 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 13:43:28,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:28,501 INFO L93 Difference]: Finished difference Result 1777 states and 4996 transitions. [2021-06-05 13:43:28,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 13:43:28,501 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 13:43:28,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:28,503 INFO L225 Difference]: With dead ends: 1777 [2021-06-05 13:43:28,503 INFO L226 Difference]: Without dead ends: 1777 [2021-06-05 13:43:28,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 244.7ms TimeCoverageRelationStatistics Valid=545, Invalid=937, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 13:43:28,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-06-05 13:43:28,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1334. [2021-06-05 13:43:28,516 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 13:43:28,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 4035 transitions. [2021-06-05 13:43:28,518 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 4035 transitions. Word has length 20 [2021-06-05 13:43:28,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:28,518 INFO L482 AbstractCegarLoop]: Abstraction has 1334 states and 4035 transitions. [2021-06-05 13:43:28,518 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 13:43:28,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 4035 transitions. [2021-06-05 13:43:28,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:28,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:28,519 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:28,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 13:43:28,729 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:28,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:28,730 INFO L82 PathProgramCache]: Analyzing trace with hash 2008722985, now seen corresponding path program 141 times [2021-06-05 13:43:28,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:28,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165553130] [2021-06-05 13:43:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:28,760 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 13:43:28,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:28,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165553130] [2021-06-05 13:43:28,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165553130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:28,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641780373] [2021-06-05 13:43:28,760 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 13:43:28,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:43:28,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:28,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:28,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:28,844 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 13:43:28,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641780373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:28,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:28,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 13:43:28,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012965963] [2021-06-05 13:43:28,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:28,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:28,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:28,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:28,845 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 13:43:29,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:29,206 INFO L93 Difference]: Finished difference Result 1692 states and 4755 transitions. [2021-06-05 13:43:29,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 13:43:29,207 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 13:43:29,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:29,209 INFO L225 Difference]: With dead ends: 1692 [2021-06-05 13:43:29,209 INFO L226 Difference]: Without dead ends: 1683 [2021-06-05 13:43:29,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 311.3ms TimeCoverageRelationStatistics Valid=782, Invalid=1570, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 13:43:29,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-06-05 13:43:29,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1280. [2021-06-05 13:43:29,221 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 13:43:29,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 3850 transitions. [2021-06-05 13:43:29,223 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 3850 transitions. Word has length 20 [2021-06-05 13:43:29,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:29,223 INFO L482 AbstractCegarLoop]: Abstraction has 1280 states and 3850 transitions. [2021-06-05 13:43:29,223 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 13:43:29,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 3850 transitions. [2021-06-05 13:43:29,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:29,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:29,224 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:29,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 13:43:29,438 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:29,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:29,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1751014509, now seen corresponding path program 142 times [2021-06-05 13:43:29,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:29,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743158399] [2021-06-05 13:43:29,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:29,504 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 13:43:29,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:29,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743158399] [2021-06-05 13:43:29,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743158399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:29,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254010584] [2021-06-05 13:43:29,504 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 13:43:29,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:29,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:29,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:29,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:29,591 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 13:43:29,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254010584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:29,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:29,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 13:43:29,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334949938] [2021-06-05 13:43:29,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:29,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:29,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:29,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:29,592 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 13:43:29,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:29,940 INFO L93 Difference]: Finished difference Result 1586 states and 4510 transitions. [2021-06-05 13:43:29,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 13:43:29,941 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 13:43:29,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:29,942 INFO L225 Difference]: With dead ends: 1586 [2021-06-05 13:43:29,942 INFO L226 Difference]: Without dead ends: 1574 [2021-06-05 13:43:29,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 305.5ms TimeCoverageRelationStatistics Valid=776, Invalid=1674, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 13:43:29,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2021-06-05 13:43:29,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1291. [2021-06-05 13:43:29,953 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 13:43:29,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 3885 transitions. [2021-06-05 13:43:29,956 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 3885 transitions. Word has length 20 [2021-06-05 13:43:29,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:29,956 INFO L482 AbstractCegarLoop]: Abstraction has 1291 states and 3885 transitions. [2021-06-05 13:43:29,956 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 13:43:29,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 3885 transitions. [2021-06-05 13:43:29,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:29,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:29,957 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:30,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 13:43:30,165 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:30,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:30,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1012163591, now seen corresponding path program 143 times [2021-06-05 13:43:30,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:30,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481256003] [2021-06-05 13:43:30,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:30,203 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 13:43:30,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:30,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481256003] [2021-06-05 13:43:30,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481256003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:30,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571359050] [2021-06-05 13:43:30,203 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 13:43:30,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:43:30,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:30,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:30,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:30,298 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 13:43:30,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571359050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:30,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:30,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 13:43:30,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210122385] [2021-06-05 13:43:30,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:43:30,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:30,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:43:30,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:43:30,299 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 13:43:30,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:30,612 INFO L93 Difference]: Finished difference Result 1481 states and 4275 transitions. [2021-06-05 13:43:30,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:43:30,612 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 13:43:30,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:30,614 INFO L225 Difference]: With dead ends: 1481 [2021-06-05 13:43:30,614 INFO L226 Difference]: Without dead ends: 1481 [2021-06-05 13:43:30,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 277.1ms TimeCoverageRelationStatistics Valid=544, Invalid=1262, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 13:43:30,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-06-05 13:43:30,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1282. [2021-06-05 13:43:30,626 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 13:43:30,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 3856 transitions. [2021-06-05 13:43:30,628 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 3856 transitions. Word has length 20 [2021-06-05 13:43:30,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:30,628 INFO L482 AbstractCegarLoop]: Abstraction has 1282 states and 3856 transitions. [2021-06-05 13:43:30,628 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 13:43:30,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 3856 transitions. [2021-06-05 13:43:30,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:30,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:30,636 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:30,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 13:43:30,837 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:30,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:30,837 INFO L82 PathProgramCache]: Analyzing trace with hash 141559951, now seen corresponding path program 144 times [2021-06-05 13:43:30,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:30,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141182805] [2021-06-05 13:43:30,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:30,866 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 13:43:30,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:30,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141182805] [2021-06-05 13:43:30,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141182805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:30,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898772097] [2021-06-05 13:43:30,866 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 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 13:43:30,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:43:30,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:30,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:30,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:30,957 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 13:43:30,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898772097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:30,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:30,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 13:43:30,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740857782] [2021-06-05 13:43:30,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:30,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:30,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:30,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:30,958 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 13:43:31,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:31,216 INFO L93 Difference]: Finished difference Result 1620 states and 4620 transitions. [2021-06-05 13:43:31,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:43:31,217 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 13:43:31,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:31,218 INFO L225 Difference]: With dead ends: 1620 [2021-06-05 13:43:31,218 INFO L226 Difference]: Without dead ends: 1614 [2021-06-05 13:43:31,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 233.0ms TimeCoverageRelationStatistics Valid=436, Invalid=970, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 13:43:31,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-06-05 13:43:31,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1305. [2021-06-05 13:43:31,229 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 13:43:31,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 3930 transitions. [2021-06-05 13:43:31,231 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 3930 transitions. Word has length 20 [2021-06-05 13:43:31,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:31,231 INFO L482 AbstractCegarLoop]: Abstraction has 1305 states and 3930 transitions. [2021-06-05 13:43:31,231 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 13:43:31,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 3930 transitions. [2021-06-05 13:43:31,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:31,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:31,232 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:31,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:31,433 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:31,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:31,433 INFO L82 PathProgramCache]: Analyzing trace with hash 529117959, now seen corresponding path program 145 times [2021-06-05 13:43:31,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:31,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126044457] [2021-06-05 13:43:31,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:31,461 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 13:43:31,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:31,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126044457] [2021-06-05 13:43:31,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126044457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:31,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922254168] [2021-06-05 13:43:31,461 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 13:43:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:31,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:31,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:31,550 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 13:43:31,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922254168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:31,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:31,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 13:43:31,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858178980] [2021-06-05 13:43:31,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:31,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:31,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:31,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:31,551 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 13:43:31,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:31,804 INFO L93 Difference]: Finished difference Result 1830 states and 5202 transitions. [2021-06-05 13:43:31,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:43:31,804 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 13:43:31,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:31,806 INFO L225 Difference]: With dead ends: 1830 [2021-06-05 13:43:31,806 INFO L226 Difference]: Without dead ends: 1828 [2021-06-05 13:43:31,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 209.9ms TimeCoverageRelationStatistics Valid=408, Invalid=782, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:43:31,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-06-05 13:43:31,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1345. [2021-06-05 13:43:31,823 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 13:43:31,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4050 transitions. [2021-06-05 13:43:31,825 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4050 transitions. Word has length 20 [2021-06-05 13:43:31,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:31,825 INFO L482 AbstractCegarLoop]: Abstraction has 1345 states and 4050 transitions. [2021-06-05 13:43:31,825 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 13:43:31,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4050 transitions. [2021-06-05 13:43:31,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:31,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:31,827 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:32,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 13:43:32,028 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:32,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:32,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1372903823, now seen corresponding path program 146 times [2021-06-05 13:43:32,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:32,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711869925] [2021-06-05 13:43:32,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:32,062 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 13:43:32,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:32,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711869925] [2021-06-05 13:43:32,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711869925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:32,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319133801] [2021-06-05 13:43:32,062 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 13:43:32,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:32,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:32,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:32,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:32,160 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 13:43:32,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319133801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:32,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:32,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 13:43:32,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343728303] [2021-06-05 13:43:32,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:32,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:32,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:32,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:32,161 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 13:43:32,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:32,460 INFO L93 Difference]: Finished difference Result 1888 states and 5315 transitions. [2021-06-05 13:43:32,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:43:32,460 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 13:43:32,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:32,462 INFO L225 Difference]: With dead ends: 1888 [2021-06-05 13:43:32,462 INFO L226 Difference]: Without dead ends: 1888 [2021-06-05 13:43:32,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 229.8ms TimeCoverageRelationStatistics Valid=495, Invalid=837, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:43:32,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-06-05 13:43:32,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1399. [2021-06-05 13:43:32,475 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 13:43:32,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 4230 transitions. [2021-06-05 13:43:32,477 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 4230 transitions. Word has length 20 [2021-06-05 13:43:32,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:32,477 INFO L482 AbstractCegarLoop]: Abstraction has 1399 states and 4230 transitions. [2021-06-05 13:43:32,477 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 13:43:32,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 4230 transitions. [2021-06-05 13:43:32,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:32,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:32,479 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:32,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 13:43:32,679 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:32,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:32,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1944358629, now seen corresponding path program 147 times [2021-06-05 13:43:32,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:32,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846064810] [2021-06-05 13:43:32,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:32,704 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 13:43:32,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:32,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846064810] [2021-06-05 13:43:32,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846064810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:32,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262991308] [2021-06-05 13:43:32,705 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 13:43:32,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:43:32,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:32,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:32,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:32,797 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 13:43:32,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262991308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:32,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:32,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 13:43:32,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739609995] [2021-06-05 13:43:32,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:32,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:32,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:32,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:32,798 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 13:43:33,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:33,225 INFO L93 Difference]: Finished difference Result 1840 states and 5179 transitions. [2021-06-05 13:43:33,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 13:43:33,225 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 13:43:33,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:33,227 INFO L225 Difference]: With dead ends: 1840 [2021-06-05 13:43:33,227 INFO L226 Difference]: Without dead ends: 1831 [2021-06-05 13:43:33,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 344.1ms TimeCoverageRelationStatistics Valid=855, Invalid=1797, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 13:43:33,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-06-05 13:43:33,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1368. [2021-06-05 13:43:33,239 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 13:43:33,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 4122 transitions. [2021-06-05 13:43:33,241 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 4122 transitions. Word has length 20 [2021-06-05 13:43:33,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:33,241 INFO L482 AbstractCegarLoop]: Abstraction has 1368 states and 4122 transitions. [2021-06-05 13:43:33,241 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 13:43:33,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 4122 transitions. [2021-06-05 13:43:33,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:33,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:33,243 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:33,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:33,457 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:33,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:33,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1815378865, now seen corresponding path program 148 times [2021-06-05 13:43:33,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:33,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098149236] [2021-06-05 13:43:33,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:33,487 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 13:43:33,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:33,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098149236] [2021-06-05 13:43:33,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098149236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:33,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266331288] [2021-06-05 13:43:33,488 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 13:43:33,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:33,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:33,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:33,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:33,576 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 13:43:33,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266331288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:33,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:33,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 13:43:33,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842575919] [2021-06-05 13:43:33,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:33,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:33,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:33,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:33,577 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 13:43:33,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:33,951 INFO L93 Difference]: Finished difference Result 1834 states and 5156 transitions. [2021-06-05 13:43:33,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 13:43:33,951 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 13:43:33,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:33,953 INFO L225 Difference]: With dead ends: 1834 [2021-06-05 13:43:33,953 INFO L226 Difference]: Without dead ends: 1822 [2021-06-05 13:43:33,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 335.0ms TimeCoverageRelationStatistics Valid=776, Invalid=1774, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 13:43:33,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2021-06-05 13:43:33,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1349. [2021-06-05 13:43:33,979 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 13:43:33,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4065 transitions. [2021-06-05 13:43:33,981 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4065 transitions. Word has length 20 [2021-06-05 13:43:33,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:33,981 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 4065 transitions. [2021-06-05 13:43:33,981 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 13:43:33,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4065 transitions. [2021-06-05 13:43:33,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:33,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:33,982 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:34,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:34,197 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:34,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:34,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1891843109, now seen corresponding path program 149 times [2021-06-05 13:43:34,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:34,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699812494] [2021-06-05 13:43:34,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:34,230 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 13:43:34,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:34,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699812494] [2021-06-05 13:43:34,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699812494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:34,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374530225] [2021-06-05 13:43:34,230 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 13:43:34,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:43:34,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:34,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:34,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:34,331 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 13:43:34,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374530225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:34,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:34,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 13:43:34,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419869953] [2021-06-05 13:43:34,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:43:34,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:34,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:43:34,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:43:34,332 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 13:43:34,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:34,676 INFO L93 Difference]: Finished difference Result 1747 states and 4974 transitions. [2021-06-05 13:43:34,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 13:43:34,676 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 13:43:34,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:34,678 INFO L225 Difference]: With dead ends: 1747 [2021-06-05 13:43:34,678 INFO L226 Difference]: Without dead ends: 1729 [2021-06-05 13:43:34,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 311.5ms TimeCoverageRelationStatistics Valid=746, Invalid=1804, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 13:43:34,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-06-05 13:43:34,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1363. [2021-06-05 13:43:34,691 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 13:43:34,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 4113 transitions. [2021-06-05 13:43:34,693 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 4113 transitions. Word has length 20 [2021-06-05 13:43:34,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:34,693 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 4113 transitions. [2021-06-05 13:43:34,693 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 13:43:34,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 4113 transitions. [2021-06-05 13:43:34,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:34,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:34,694 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:34,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:34,895 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:34,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:34,895 INFO L82 PathProgramCache]: Analyzing trace with hash 235777619, now seen corresponding path program 150 times [2021-06-05 13:43:34,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:34,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888092375] [2021-06-05 13:43:34,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:34,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:34,931 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 13:43:34,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:34,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888092375] [2021-06-05 13:43:34,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888092375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:34,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890877948] [2021-06-05 13:43:34,931 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 13:43:34,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:43:34,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:34,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:34,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:35,056 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 13:43:35,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890877948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:35,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:35,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 13:43:35,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979656511] [2021-06-05 13:43:35,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:43:35,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:35,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:43:35,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:43:35,056 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 13:43:35,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:35,396 INFO L93 Difference]: Finished difference Result 1698 states and 4871 transitions. [2021-06-05 13:43:35,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:43:35,396 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 13:43:35,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:35,398 INFO L225 Difference]: With dead ends: 1698 [2021-06-05 13:43:35,398 INFO L226 Difference]: Without dead ends: 1698 [2021-06-05 13:43:35,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 315.2ms TimeCoverageRelationStatistics Valid=603, Invalid=1467, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 13:43:35,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-06-05 13:43:35,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1400. [2021-06-05 13:43:35,410 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 13:43:35,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 4216 transitions. [2021-06-05 13:43:35,412 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 4216 transitions. Word has length 20 [2021-06-05 13:43:35,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:35,412 INFO L482 AbstractCegarLoop]: Abstraction has 1400 states and 4216 transitions. [2021-06-05 13:43:35,412 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 13:43:35,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 4216 transitions. [2021-06-05 13:43:35,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:35,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:35,414 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:35,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:35,629 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:35,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:35,629 INFO L82 PathProgramCache]: Analyzing trace with hash -97333165, now seen corresponding path program 151 times [2021-06-05 13:43:35,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:35,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356247533] [2021-06-05 13:43:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:35,659 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 13:43:35,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:35,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356247533] [2021-06-05 13:43:35,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356247533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:35,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717120497] [2021-06-05 13:43:35,659 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 13:43:35,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:35,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:35,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:35,760 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 13:43:35,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717120497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:35,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:35,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 13:43:35,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499790869] [2021-06-05 13:43:35,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:43:35,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:35,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:43:35,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:43:35,761 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 13:43:36,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:36,061 INFO L93 Difference]: Finished difference Result 1946 states and 5516 transitions. [2021-06-05 13:43:36,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:43:36,062 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 13:43:36,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:36,064 INFO L225 Difference]: With dead ends: 1946 [2021-06-05 13:43:36,064 INFO L226 Difference]: Without dead ends: 1946 [2021-06-05 13:43:36,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 259.0ms TimeCoverageRelationStatistics Valid=468, Invalid=1092, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 13:43:36,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2021-06-05 13:43:36,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1486. [2021-06-05 13:43:36,078 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 13:43:36,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 4485 transitions. [2021-06-05 13:43:36,080 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 4485 transitions. Word has length 20 [2021-06-05 13:43:36,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:36,080 INFO L482 AbstractCegarLoop]: Abstraction has 1486 states and 4485 transitions. [2021-06-05 13:43:36,080 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 13:43:36,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 4485 transitions. [2021-06-05 13:43:36,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:36,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:36,082 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:36,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-06-05 13:43:36,297 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:36,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:36,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1138847315, now seen corresponding path program 152 times [2021-06-05 13:43:36,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:36,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875378059] [2021-06-05 13:43:36,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:36,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:36,326 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 13:43:36,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:36,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875378059] [2021-06-05 13:43:36,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875378059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:36,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909963403] [2021-06-05 13:43:36,327 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 13:43:36,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:36,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:36,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:36,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:36,429 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 13:43:36,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909963403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:36,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:36,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 13:43:36,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167199908] [2021-06-05 13:43:36,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:36,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:36,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:36,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:36,430 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 13:43:36,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:36,724 INFO L93 Difference]: Finished difference Result 2146 states and 6136 transitions. [2021-06-05 13:43:36,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:43:36,724 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 13:43:36,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:36,727 INFO L225 Difference]: With dead ends: 2146 [2021-06-05 13:43:36,727 INFO L226 Difference]: Without dead ends: 2146 [2021-06-05 13:43:36,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 242.0ms TimeCoverageRelationStatistics Valid=438, Invalid=894, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:43:36,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2021-06-05 13:43:36,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 1603. [2021-06-05 13:43:36,745 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 13:43:36,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 4862 transitions. [2021-06-05 13:43:36,748 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 4862 transitions. Word has length 20 [2021-06-05 13:43:36,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:36,748 INFO L482 AbstractCegarLoop]: Abstraction has 1603 states and 4862 transitions. [2021-06-05 13:43:36,748 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 13:43:36,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 4862 transitions. [2021-06-05 13:43:36,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:36,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:36,750 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:36,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:36,962 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:36,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:36,962 INFO L82 PathProgramCache]: Analyzing trace with hash -622391213, now seen corresponding path program 153 times [2021-06-05 13:43:36,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:36,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094170326] [2021-06-05 13:43:36,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:36,987 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 13:43:36,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:36,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094170326] [2021-06-05 13:43:36,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094170326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:36,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255508187] [2021-06-05 13:43:36,987 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 13:43:37,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:43:37,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:37,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:37,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:37,079 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 13:43:37,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255508187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:37,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:37,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-05 13:43:37,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987207119] [2021-06-05 13:43:37,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:37,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:37,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:37,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:37,080 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 13:43:37,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:37,368 INFO L93 Difference]: Finished difference Result 2514 states and 7203 transitions. [2021-06-05 13:43:37,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:43:37,369 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 13:43:37,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:37,371 INFO L225 Difference]: With dead ends: 2514 [2021-06-05 13:43:37,371 INFO L226 Difference]: Without dead ends: 2514 [2021-06-05 13:43:37,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 234.7ms TimeCoverageRelationStatistics Valid=491, Invalid=841, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:43:37,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-05 13:43:37,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 1911. [2021-06-05 13:43:37,397 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 13:43:37,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 5864 transitions. [2021-06-05 13:43:37,399 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 5864 transitions. Word has length 20 [2021-06-05 13:43:37,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:37,399 INFO L482 AbstractCegarLoop]: Abstraction has 1911 states and 5864 transitions. [2021-06-05 13:43:37,400 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 13:43:37,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 5864 transitions. [2021-06-05 13:43:37,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:37,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:37,401 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:37,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 13:43:37,602 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:37,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:37,602 INFO L82 PathProgramCache]: Analyzing trace with hash -50936407, now seen corresponding path program 154 times [2021-06-05 13:43:37,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:37,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492955478] [2021-06-05 13:43:37,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:37,624 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 13:43:37,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:37,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492955478] [2021-06-05 13:43:37,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492955478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:37,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898902897] [2021-06-05 13:43:37,625 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 13:43:37,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:37,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:37,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:37,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:37,718 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 13:43:37,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898902897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:37,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:37,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-05 13:43:37,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824658302] [2021-06-05 13:43:37,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:43:37,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:37,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:43:37,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:43:37,719 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 13:43:38,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:38,198 INFO L93 Difference]: Finished difference Result 2413 states and 6919 transitions. [2021-06-05 13:43:38,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 13:43:38,198 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 13:43:38,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:38,201 INFO L225 Difference]: With dead ends: 2413 [2021-06-05 13:43:38,201 INFO L226 Difference]: Without dead ends: 2407 [2021-06-05 13:43:38,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 402.5ms TimeCoverageRelationStatistics Valid=988, Invalid=2204, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 13:43:38,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2021-06-05 13:43:38,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 1890. [2021-06-05 13:43:38,223 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 13:43:38,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 5785 transitions. [2021-06-05 13:43:38,225 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 5785 transitions. Word has length 20 [2021-06-05 13:43:38,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:38,226 INFO L482 AbstractCegarLoop]: Abstraction has 1890 states and 5785 transitions. [2021-06-05 13:43:38,226 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 13:43:38,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 5785 transitions. [2021-06-05 13:43:38,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:38,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:38,228 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:38,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 13:43:38,428 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:38,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:38,428 INFO L82 PathProgramCache]: Analyzing trace with hash 484293395, now seen corresponding path program 155 times [2021-06-05 13:43:38,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:38,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875349997] [2021-06-05 13:43:38,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:38,454 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 13:43:38,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:38,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875349997] [2021-06-05 13:43:38,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875349997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:38,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267546997] [2021-06-05 13:43:38,455 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 13:43:38,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:43:38,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:38,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:38,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:38,565 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 13:43:38,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267546997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:38,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:38,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 13:43:38,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917393730] [2021-06-05 13:43:38,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:38,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:38,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:38,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:38,566 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 13:43:38,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:38,975 INFO L93 Difference]: Finished difference Result 2435 states and 6986 transitions. [2021-06-05 13:43:38,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 13:43:38,976 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 13:43:38,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:38,978 INFO L225 Difference]: With dead ends: 2435 [2021-06-05 13:43:38,978 INFO L226 Difference]: Without dead ends: 2423 [2021-06-05 13:43:38,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 364.7ms TimeCoverageRelationStatistics Valid=842, Invalid=2020, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 13:43:38,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-06-05 13:43:38,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 1924. [2021-06-05 13:43:38,998 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 13:43:39,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5901 transitions. [2021-06-05 13:43:39,000 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5901 transitions. Word has length 20 [2021-06-05 13:43:39,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:39,000 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 5901 transitions. [2021-06-05 13:43:39,001 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 13:43:39,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5901 transitions. [2021-06-05 13:43:39,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:39,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:39,002 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:39,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-06-05 13:43:39,203 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:39,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:39,203 INFO L82 PathProgramCache]: Analyzing trace with hash -103451927, now seen corresponding path program 156 times [2021-06-05 13:43:39,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:39,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937292331] [2021-06-05 13:43:39,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:39,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:39,234 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 13:43:39,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:39,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937292331] [2021-06-05 13:43:39,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937292331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:39,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942842941] [2021-06-05 13:43:39,234 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 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 13:43:39,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:43:39,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:39,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:39,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:39,333 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 13:43:39,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942842941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:39,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:39,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 13:43:39,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493859281] [2021-06-05 13:43:39,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:43:39,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:39,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:43:39,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:43:39,334 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 13:43:39,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:39,725 INFO L93 Difference]: Finished difference Result 2515 states and 7235 transitions. [2021-06-05 13:43:39,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 13:43:39,726 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 13:43:39,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:39,729 INFO L225 Difference]: With dead ends: 2515 [2021-06-05 13:43:39,729 INFO L226 Difference]: Without dead ends: 2497 [2021-06-05 13:43:39,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 353.7ms TimeCoverageRelationStatistics Valid=743, Invalid=1909, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 13:43:39,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-06-05 13:43:39,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1989. [2021-06-05 13:43:39,750 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 13:43:39,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 6115 transitions. [2021-06-05 13:43:39,753 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 6115 transitions. Word has length 20 [2021-06-05 13:43:39,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:39,753 INFO L482 AbstractCegarLoop]: Abstraction has 1989 states and 6115 transitions. [2021-06-05 13:43:39,753 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 13:43:39,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 6115 transitions. [2021-06-05 13:43:39,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:43:39,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:39,755 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:39,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:39,956 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:39,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:39,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1143687725, now seen corresponding path program 157 times [2021-06-05 13:43:39,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:39,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804674356] [2021-06-05 13:43:39,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:39,992 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 13:43:39,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:39,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804674356] [2021-06-05 13:43:39,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804674356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:39,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382036157] [2021-06-05 13:43:39,992 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 13:43:40,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:40,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:43:40,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:40,118 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 13:43:40,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382036157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:40,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:40,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 13:43:40,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948455052] [2021-06-05 13:43:40,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:43:40,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:40,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:43:40,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:43:40,119 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 13:43:40,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:40,478 INFO L93 Difference]: Finished difference Result 2460 states and 7169 transitions. [2021-06-05 13:43:40,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 13:43:40,478 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 13:43:40,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:40,481 INFO L225 Difference]: With dead ends: 2460 [2021-06-05 13:43:40,481 INFO L226 Difference]: Without dead ends: 2436 [2021-06-05 13:43:40,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 324.6ms TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 13:43:40,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-06-05 13:43:40,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 2023. [2021-06-05 13:43:40,499 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 13:43:40,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 6215 transitions. [2021-06-05 13:43:40,502 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 6215 transitions. Word has length 20 [2021-06-05 13:43:40,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:40,502 INFO L482 AbstractCegarLoop]: Abstraction has 2023 states and 6215 transitions. [2021-06-05 13:43:40,502 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 13:43:40,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 6215 transitions. [2021-06-05 13:43:40,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:40,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:40,504 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:40,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-06-05 13:43:40,705 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:40,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:40,705 INFO L82 PathProgramCache]: Analyzing trace with hash -950598133, now seen corresponding path program 158 times [2021-06-05 13:43:40,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:40,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135770077] [2021-06-05 13:43:40,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:40,811 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 13:43:40,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:40,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135770077] [2021-06-05 13:43:40,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135770077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:40,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878005260] [2021-06-05 13:43:40,812 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 13:43:40,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:40,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:40,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:40,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:40,926 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 13:43:40,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878005260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:40,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:40,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 13:43:40,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782150448] [2021-06-05 13:43:40,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:40,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:40,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:40,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:40,927 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 13:43:41,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:41,224 INFO L93 Difference]: Finished difference Result 2290 states and 6704 transitions. [2021-06-05 13:43:41,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:43:41,224 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 13:43:41,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:41,227 INFO L225 Difference]: With dead ends: 2290 [2021-06-05 13:43:41,228 INFO L226 Difference]: Without dead ends: 2264 [2021-06-05 13:43:41,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 241.7ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:43:41,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-06-05 13:43:41,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2067. [2021-06-05 13:43:41,249 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 13:43:41,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 6310 transitions. [2021-06-05 13:43:41,252 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 6310 transitions. Word has length 21 [2021-06-05 13:43:41,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:41,253 INFO L482 AbstractCegarLoop]: Abstraction has 2067 states and 6310 transitions. [2021-06-05 13:43:41,253 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 13:43:41,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 6310 transitions. [2021-06-05 13:43:41,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:41,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:41,255 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:41,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:41,455 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:41,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:41,455 INFO L82 PathProgramCache]: Analyzing trace with hash 2035301631, now seen corresponding path program 159 times [2021-06-05 13:43:41,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:41,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377629710] [2021-06-05 13:43:41,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:41,550 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 13:43:41,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:41,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377629710] [2021-06-05 13:43:41,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377629710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:41,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888780768] [2021-06-05 13:43:41,550 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 13:43:41,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:43:41,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:41,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:41,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:41,692 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 13:43:41,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888780768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:41,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:41,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 13:43:41,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022200133] [2021-06-05 13:43:41,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:41,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:41,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:41,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:41,693 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 13:43:41,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:41,860 INFO L93 Difference]: Finished difference Result 2347 states and 6861 transitions. [2021-06-05 13:43:41,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:43:41,860 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 13:43:41,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:41,863 INFO L225 Difference]: With dead ends: 2347 [2021-06-05 13:43:41,863 INFO L226 Difference]: Without dead ends: 2340 [2021-06-05 13:43:41,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:43:41,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2340 states. [2021-06-05 13:43:41,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2340 to 2120. [2021-06-05 13:43:41,883 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 13:43:41,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 6494 transitions. [2021-06-05 13:43:41,886 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 6494 transitions. Word has length 21 [2021-06-05 13:43:41,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:41,886 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 6494 transitions. [2021-06-05 13:43:41,886 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 13:43:41,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 6494 transitions. [2021-06-05 13:43:41,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:41,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:41,888 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:42,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:42,093 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:42,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:42,093 INFO L82 PathProgramCache]: Analyzing trace with hash -644962941, now seen corresponding path program 160 times [2021-06-05 13:43:42,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:42,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076883697] [2021-06-05 13:43:42,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:42,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:42,187 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 13:43:42,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:42,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076883697] [2021-06-05 13:43:42,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076883697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:42,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189093072] [2021-06-05 13:43:42,187 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 13:43:42,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:42,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:42,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:42,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:42,304 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 13:43:42,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189093072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:42,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:42,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 13:43:42,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704890100] [2021-06-05 13:43:42,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:42,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:42,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:42,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:42,304 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 13:43:42,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:42,525 INFO L93 Difference]: Finished difference Result 2333 states and 6841 transitions. [2021-06-05 13:43:42,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:43:42,525 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 13:43:42,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:42,527 INFO L225 Difference]: With dead ends: 2333 [2021-06-05 13:43:42,527 INFO L226 Difference]: Without dead ends: 2317 [2021-06-05 13:43:42,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 200.3ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:43:42,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-06-05 13:43:42,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2083. [2021-06-05 13:43:42,552 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 13:43:42,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2021-06-05 13:43:42,555 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2021-06-05 13:43:42,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:42,555 INFO L482 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2021-06-05 13:43:42,555 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 13:43:42,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2021-06-05 13:43:42,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:42,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:42,557 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:42,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-05 13:43:42,758 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:42,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:42,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1688210859, now seen corresponding path program 161 times [2021-06-05 13:43:42,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:42,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622251061] [2021-06-05 13:43:42,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:42,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:42,850 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 13:43:42,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:42,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622251061] [2021-06-05 13:43:42,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622251061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:42,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589390476] [2021-06-05 13:43:42,851 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 13:43:42,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:43:42,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:42,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:42,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:42,994 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 13:43:42,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589390476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:42,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:42,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 13:43:42,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472686769] [2021-06-05 13:43:42,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:42,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:42,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:42,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:42,995 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 13:43:43,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:43,214 INFO L93 Difference]: Finished difference Result 2307 states and 6745 transitions. [2021-06-05 13:43:43,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:43:43,215 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 13:43:43,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:43,217 INFO L225 Difference]: With dead ends: 2307 [2021-06-05 13:43:43,217 INFO L226 Difference]: Without dead ends: 2300 [2021-06-05 13:43:43,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 203.2ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:43:43,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2021-06-05 13:43:43,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 2083. [2021-06-05 13:43:43,237 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 13:43:43,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2021-06-05 13:43:43,240 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2021-06-05 13:43:43,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:43,240 INFO L482 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2021-06-05 13:43:43,240 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 13:43:43,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2021-06-05 13:43:43,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:43,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:43,242 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:43,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:43,453 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:43,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:43,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1152981057, now seen corresponding path program 162 times [2021-06-05 13:43:43,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:43,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540757681] [2021-06-05 13:43:43,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:43,544 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 13:43:43,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:43,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540757681] [2021-06-05 13:43:43,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540757681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:43,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768042159] [2021-06-05 13:43:43,545 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 13:43:43,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:43:43,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:43,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:43,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:43,680 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 13:43:43,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768042159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:43,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:43,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 13:43:43,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789308818] [2021-06-05 13:43:43,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:43,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:43,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:43,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:43,681 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 13:43:43,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:43,929 INFO L93 Difference]: Finished difference Result 2324 states and 6770 transitions. [2021-06-05 13:43:43,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:43:43,929 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 13:43:43,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:43,932 INFO L225 Difference]: With dead ends: 2324 [2021-06-05 13:43:43,932 INFO L226 Difference]: Without dead ends: 2317 [2021-06-05 13:43:43,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 222.3ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:43:43,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-06-05 13:43:43,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2083. [2021-06-05 13:43:43,951 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 13:43:43,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2021-06-05 13:43:43,954 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2021-06-05 13:43:43,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:43,954 INFO L482 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2021-06-05 13:43:43,954 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 13:43:43,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2021-06-05 13:43:43,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:43,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:43,956 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:44,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:44,157 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:44,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:44,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1740726379, now seen corresponding path program 163 times [2021-06-05 13:43:44,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:44,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755758681] [2021-06-05 13:43:44,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:44,253 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 13:43:44,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:44,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755758681] [2021-06-05 13:43:44,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755758681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:44,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464127744] [2021-06-05 13:43:44,253 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 13:43:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:44,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:44,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:44,405 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 13:43:44,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464127744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:44,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:44,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 13:43:44,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408450553] [2021-06-05 13:43:44,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:44,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:44,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:44,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:44,406 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 13:43:44,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:44,673 INFO L93 Difference]: Finished difference Result 2260 states and 6660 transitions. [2021-06-05 13:43:44,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:43:44,673 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 13:43:44,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:44,676 INFO L225 Difference]: With dead ends: 2260 [2021-06-05 13:43:44,676 INFO L226 Difference]: Without dead ends: 2253 [2021-06-05 13:43:44,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:43:44,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-06-05 13:43:44,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 2083. [2021-06-05 13:43:44,695 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 13:43:44,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2021-06-05 13:43:44,710 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2021-06-05 13:43:44,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:44,710 INFO L482 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2021-06-05 13:43:44,710 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 13:43:44,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2021-06-05 13:43:44,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:44,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:44,713 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:44,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-05 13:43:44,913 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:44,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:44,913 INFO L82 PathProgramCache]: Analyzing trace with hash -922738373, now seen corresponding path program 164 times [2021-06-05 13:43:44,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:44,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284636043] [2021-06-05 13:43:44,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:45,028 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 13:43:45,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:45,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284636043] [2021-06-05 13:43:45,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284636043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:45,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786584913] [2021-06-05 13:43:45,028 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 13:43:45,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:45,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:45,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:45,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:45,194 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 13:43:45,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786584913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:45,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:45,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-06-05 13:43:45,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240436862] [2021-06-05 13:43:45,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:45,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:45,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:45,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:45,196 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 13:43:45,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:45,353 INFO L93 Difference]: Finished difference Result 2270 states and 6764 transitions. [2021-06-05 13:43:45,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:43:45,353 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 13:43:45,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:45,356 INFO L225 Difference]: With dead ends: 2270 [2021-06-05 13:43:45,356 INFO L226 Difference]: Without dead ends: 2263 [2021-06-05 13:43:45,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 212.9ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:43:45,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-06-05 13:43:45,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2113. [2021-06-05 13:43:45,376 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 13:43:45,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6486 transitions. [2021-06-05 13:43:45,379 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6486 transitions. Word has length 21 [2021-06-05 13:43:45,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:45,380 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 6486 transitions. [2021-06-05 13:43:45,380 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 13:43:45,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6486 transitions. [2021-06-05 13:43:45,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:45,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:45,382 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:45,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 13:43:45,582 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:45,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:45,582 INFO L82 PathProgramCache]: Analyzing trace with hash 691964351, now seen corresponding path program 165 times [2021-06-05 13:43:45,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:45,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086868749] [2021-06-05 13:43:45,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:45,689 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 13:43:45,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:45,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086868749] [2021-06-05 13:43:45,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086868749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:45,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604407818] [2021-06-05 13:43:45,689 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 13:43:45,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:43:45,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:45,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:45,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:45,825 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 13:43:45,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604407818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:45,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:45,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-06-05 13:43:45,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614622608] [2021-06-05 13:43:45,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:45,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:45,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:45,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:45,826 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 13:43:45,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:45,987 INFO L93 Difference]: Finished difference Result 2271 states and 6761 transitions. [2021-06-05 13:43:45,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:43:45,987 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 13:43:45,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:45,990 INFO L225 Difference]: With dead ends: 2271 [2021-06-05 13:43:45,990 INFO L226 Difference]: Without dead ends: 2262 [2021-06-05 13:43:45,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 205.2ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:43:45,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-06-05 13:43:46,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2113. [2021-06-05 13:43:46,010 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 13:43:46,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6482 transitions. [2021-06-05 13:43:46,014 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6482 transitions. Word has length 21 [2021-06-05 13:43:46,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:46,014 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 6482 transitions. [2021-06-05 13:43:46,014 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 13:43:46,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6482 transitions. [2021-06-05 13:43:46,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:46,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:46,017 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:46,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-06-05 13:43:46,233 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:46,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:46,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1387329477, now seen corresponding path program 166 times [2021-06-05 13:43:46,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:46,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118640261] [2021-06-05 13:43:46,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:46,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:46,334 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 13:43:46,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:46,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118640261] [2021-06-05 13:43:46,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118640261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:46,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136047433] [2021-06-05 13:43:46,335 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 13:43:46,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:46,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:46,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:46,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:46,481 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 13:43:46,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136047433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:46,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:46,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-06-05 13:43:46,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83878117] [2021-06-05 13:43:46,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:46,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:46,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:46,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:46,482 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 13:43:46,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:46,646 INFO L93 Difference]: Finished difference Result 2235 states and 6688 transitions. [2021-06-05 13:43:46,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:43:46,646 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 13:43:46,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:46,649 INFO L225 Difference]: With dead ends: 2235 [2021-06-05 13:43:46,649 INFO L226 Difference]: Without dead ends: 2228 [2021-06-05 13:43:46,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 207.4ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:43:46,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-06-05 13:43:46,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2113. [2021-06-05 13:43:46,669 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 13:43:46,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6482 transitions. [2021-06-05 13:43:46,672 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6482 transitions. Word has length 21 [2021-06-05 13:43:46,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:46,672 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 6482 transitions. [2021-06-05 13:43:46,672 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 13:43:46,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6482 transitions. [2021-06-05 13:43:46,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:46,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:46,674 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:46,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:46,875 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:46,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:46,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1867302015, now seen corresponding path program 167 times [2021-06-05 13:43:46,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:46,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025874228] [2021-06-05 13:43:46,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:46,994 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 13:43:46,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:46,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025874228] [2021-06-05 13:43:46,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025874228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:46,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455547722] [2021-06-05 13:43:46,994 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 13:43:47,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:43:47,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:47,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:47,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:47,123 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 13:43:47,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455547722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:47,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:47,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 13:43:47,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402126267] [2021-06-05 13:43:47,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:43:47,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:47,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:43:47,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:43:47,124 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 13:43:47,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:47,329 INFO L93 Difference]: Finished difference Result 2462 states and 7260 transitions. [2021-06-05 13:43:47,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:43:47,329 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 13:43:47,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:47,332 INFO L225 Difference]: With dead ends: 2462 [2021-06-05 13:43:47,332 INFO L226 Difference]: Without dead ends: 2445 [2021-06-05 13:43:47,332 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 13:43:47,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-06-05 13:43:47,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2200. [2021-06-05 13:43:47,363 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 13:43:47,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 6781 transitions. [2021-06-05 13:43:47,367 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 6781 transitions. Word has length 21 [2021-06-05 13:43:47,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:47,367 INFO L482 AbstractCegarLoop]: Abstraction has 2200 states and 6781 transitions. [2021-06-05 13:43:47,367 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 13:43:47,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 6781 transitions. [2021-06-05 13:43:47,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:47,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:47,369 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:47,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-05 13:43:47,569 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:47,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:47,570 INFO L82 PathProgramCache]: Analyzing trace with hash -812962557, now seen corresponding path program 168 times [2021-06-05 13:43:47,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:47,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079143761] [2021-06-05 13:43:47,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:47,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:47,664 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 13:43:47,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:47,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079143761] [2021-06-05 13:43:47,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079143761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:47,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005979711] [2021-06-05 13:43:47,665 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 13:43:47,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:43:47,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:47,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:47,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:47,791 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 13:43:47,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005979711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:47,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:47,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 13:43:47,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115606353] [2021-06-05 13:43:47,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:43:47,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:47,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:43:47,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:43:47,792 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 13:43:47,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:47,973 INFO L93 Difference]: Finished difference Result 2464 states and 7241 transitions. [2021-06-05 13:43:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:43:47,973 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 13:43:47,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:47,976 INFO L225 Difference]: With dead ends: 2464 [2021-06-05 13:43:47,976 INFO L226 Difference]: Without dead ends: 2446 [2021-06-05 13:43:47,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 213.8ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:43:47,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-06-05 13:43:47,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2176. [2021-06-05 13:43:47,997 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 13:43:48,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 6687 transitions. [2021-06-05 13:43:48,001 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 6687 transitions. Word has length 21 [2021-06-05 13:43:48,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:48,001 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 6687 transitions. [2021-06-05 13:43:48,001 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 13:43:48,001 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 6687 transitions. [2021-06-05 13:43:48,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:48,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:48,003 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:48,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:48,203 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:48,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:48,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1402710911, now seen corresponding path program 169 times [2021-06-05 13:43:48,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:48,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940402546] [2021-06-05 13:43:48,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:48,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:48,303 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 13:43:48,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:48,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940402546] [2021-06-05 13:43:48,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940402546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:48,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164318098] [2021-06-05 13:43:48,303 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 13:43:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:48,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:48,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:48,463 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 13:43:48,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164318098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:48,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:48,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 13:43:48,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097172006] [2021-06-05 13:43:48,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:48,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:48,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:48,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:48,463 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 13:43:48,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:48,707 INFO L93 Difference]: Finished difference Result 2405 states and 7080 transitions. [2021-06-05 13:43:48,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:43:48,707 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 13:43:48,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:48,719 INFO L225 Difference]: With dead ends: 2405 [2021-06-05 13:43:48,719 INFO L226 Difference]: Without dead ends: 2383 [2021-06-05 13:43:48,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 242.5ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:43:48,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-06-05 13:43:48,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 2168. [2021-06-05 13:43:48,739 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 13:43:48,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 6658 transitions. [2021-06-05 13:43:48,742 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 6658 transitions. Word has length 21 [2021-06-05 13:43:48,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:48,742 INFO L482 AbstractCegarLoop]: Abstraction has 2168 states and 6658 transitions. [2021-06-05 13:43:48,742 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 13:43:48,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 6658 transitions. [2021-06-05 13:43:48,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:48,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:48,744 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:48,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:48,945 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:48,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:48,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1369111683, now seen corresponding path program 170 times [2021-06-05 13:43:48,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:48,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430804078] [2021-06-05 13:43:48,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:49,046 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 13:43:49,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:49,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430804078] [2021-06-05 13:43:49,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430804078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:49,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853150139] [2021-06-05 13:43:49,047 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 13:43:49,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:49,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:49,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:49,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:49,192 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 13:43:49,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853150139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:49,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:49,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 13:43:49,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970302007] [2021-06-05 13:43:49,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:49,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:49,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:49,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:49,193 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 13:43:49,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:49,390 INFO L93 Difference]: Finished difference Result 2338 states and 6943 transitions. [2021-06-05 13:43:49,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:43:49,390 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 13:43:49,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:49,393 INFO L225 Difference]: With dead ends: 2338 [2021-06-05 13:43:49,393 INFO L226 Difference]: Without dead ends: 2331 [2021-06-05 13:43:49,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 226.0ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:43:49,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-06-05 13:43:49,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2168. [2021-06-05 13:43:49,412 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 13:43:49,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 6658 transitions. [2021-06-05 13:43:49,415 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 6658 transitions. Word has length 21 [2021-06-05 13:43:49,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:49,415 INFO L482 AbstractCegarLoop]: Abstraction has 2168 states and 6658 transitions. [2021-06-05 13:43:49,415 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 13:43:49,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 6658 transitions. [2021-06-05 13:43:49,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:49,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:49,417 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:49,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:49,618 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:49,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:49,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1898222891, now seen corresponding path program 171 times [2021-06-05 13:43:49,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:49,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970723969] [2021-06-05 13:43:49,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:49,705 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 13:43:49,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:49,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970723969] [2021-06-05 13:43:49,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970723969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:49,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899018405] [2021-06-05 13:43:49,705 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 13:43:49,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:43:49,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:49,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:49,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:49,844 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 13:43:49,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899018405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:49,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:49,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-06-05 13:43:49,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656383559] [2021-06-05 13:43:49,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:49,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:49,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:49,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:49,845 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 13:43:50,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:50,010 INFO L93 Difference]: Finished difference Result 2327 states and 6929 transitions. [2021-06-05 13:43:50,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:43:50,010 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 13:43:50,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:50,013 INFO L225 Difference]: With dead ends: 2327 [2021-06-05 13:43:50,013 INFO L226 Difference]: Without dead ends: 2314 [2021-06-05 13:43:50,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 183.9ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:43:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-06-05 13:43:50,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2158. [2021-06-05 13:43:50,040 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 13:43:50,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 6619 transitions. [2021-06-05 13:43:50,043 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 6619 transitions. Word has length 21 [2021-06-05 13:43:50,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:50,043 INFO L482 AbstractCegarLoop]: Abstraction has 2158 states and 6619 transitions. [2021-06-05 13:43:50,043 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 13:43:50,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 6619 transitions. [2021-06-05 13:43:50,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:50,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:50,045 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:50,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 13:43:50,249 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:50,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:50,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1835759173, now seen corresponding path program 172 times [2021-06-05 13:43:50,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:50,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311378261] [2021-06-05 13:43:50,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:50,340 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 13:43:50,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:50,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311378261] [2021-06-05 13:43:50,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311378261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:50,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053234890] [2021-06-05 13:43:50,340 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 13:43:50,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:50,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:50,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:50,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:50,455 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 13:43:50,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053234890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:50,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:50,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-05 13:43:50,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386874881] [2021-06-05 13:43:50,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:50,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:50,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:50,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:50,456 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 13:43:50,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:50,678 INFO L93 Difference]: Finished difference Result 2518 states and 7412 transitions. [2021-06-05 13:43:50,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:43:50,678 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 13:43:50,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:50,682 INFO L225 Difference]: With dead ends: 2518 [2021-06-05 13:43:50,682 INFO L226 Difference]: Without dead ends: 2501 [2021-06-05 13:43:50,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 195.0ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:43:50,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2021-06-05 13:43:50,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 2261. [2021-06-05 13:43:50,704 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 13:43:50,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2261 states to 2261 states and 6970 transitions. [2021-06-05 13:43:50,708 INFO L78 Accepts]: Start accepts. Automaton has 2261 states and 6970 transitions. Word has length 21 [2021-06-05 13:43:50,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:50,708 INFO L482 AbstractCegarLoop]: Abstraction has 2261 states and 6970 transitions. [2021-06-05 13:43:50,708 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 13:43:50,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2261 states and 6970 transitions. [2021-06-05 13:43:50,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:50,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:50,710 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:50,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-05 13:43:50,917 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:50,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:50,917 INFO L82 PathProgramCache]: Analyzing trace with hash -221056449, now seen corresponding path program 173 times [2021-06-05 13:43:50,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:50,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325474135] [2021-06-05 13:43:50,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:50,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:51,021 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 13:43:51,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:51,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325474135] [2021-06-05 13:43:51,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325474135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:51,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28874441] [2021-06-05 13:43:51,022 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 13:43:51,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:43:51,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:51,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:51,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:51,141 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 13:43:51,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28874441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:51,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:51,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-05 13:43:51,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709583257] [2021-06-05 13:43:51,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:51,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:51,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:51,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:51,141 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 13:43:51,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:51,360 INFO L93 Difference]: Finished difference Result 2516 states and 7381 transitions. [2021-06-05 13:43:51,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:43:51,360 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 13:43:51,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:51,363 INFO L225 Difference]: With dead ends: 2516 [2021-06-05 13:43:51,363 INFO L226 Difference]: Without dead ends: 2498 [2021-06-05 13:43:51,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 205.0ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:43:51,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-06-05 13:43:51,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2230. [2021-06-05 13:43:51,383 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 13:43:51,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 6853 transitions. [2021-06-05 13:43:51,386 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 6853 transitions. Word has length 21 [2021-06-05 13:43:51,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:51,387 INFO L482 AbstractCegarLoop]: Abstraction has 2230 states and 6853 transitions. [2021-06-05 13:43:51,387 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 13:43:51,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 6853 transitions. [2021-06-05 13:43:51,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:51,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:51,389 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:51,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:51,589 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:51,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:51,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1994617019, now seen corresponding path program 174 times [2021-06-05 13:43:51,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:51,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883843126] [2021-06-05 13:43:51,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:51,680 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 13:43:51,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:51,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883843126] [2021-06-05 13:43:51,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883843126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:51,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907094551] [2021-06-05 13:43:51,681 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 13:43:51,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:43:51,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:51,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:51,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:51,794 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 13:43:51,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907094551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:51,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:51,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-05 13:43:51,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222479981] [2021-06-05 13:43:51,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:51,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:51,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:51,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:51,795 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 13:43:52,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:52,042 INFO L93 Difference]: Finished difference Result 2507 states and 7296 transitions. [2021-06-05 13:43:52,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:43:52,042 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 13:43:52,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:52,045 INFO L225 Difference]: With dead ends: 2507 [2021-06-05 13:43:52,045 INFO L226 Difference]: Without dead ends: 2485 [2021-06-05 13:43:52,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 205.4ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:43:52,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2021-06-05 13:43:52,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 2217. [2021-06-05 13:43:52,066 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 13:43:52,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 6803 transitions. [2021-06-05 13:43:52,070 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 6803 transitions. Word has length 21 [2021-06-05 13:43:52,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:52,070 INFO L482 AbstractCegarLoop]: Abstraction has 2217 states and 6803 transitions. [2021-06-05 13:43:52,070 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 13:43:52,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 6803 transitions. [2021-06-05 13:43:52,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:52,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:52,072 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:52,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-06-05 13:43:52,272 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:52,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:52,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1961017791, now seen corresponding path program 175 times [2021-06-05 13:43:52,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:52,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981096622] [2021-06-05 13:43:52,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:52,364 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 13:43:52,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:52,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981096622] [2021-06-05 13:43:52,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981096622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:52,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154928459] [2021-06-05 13:43:52,364 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 13:43:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:52,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:52,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:52,482 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 13:43:52,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154928459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:52,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:52,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-05 13:43:52,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395222576] [2021-06-05 13:43:52,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:52,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:52,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:52,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:52,483 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 13:43:52,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:52,750 INFO L93 Difference]: Finished difference Result 2454 states and 7183 transitions. [2021-06-05 13:43:52,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:43:52,751 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 13:43:52,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:52,754 INFO L225 Difference]: With dead ends: 2454 [2021-06-05 13:43:52,754 INFO L226 Difference]: Without dead ends: 2428 [2021-06-05 13:43:52,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 221.5ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:43:52,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-06-05 13:43:52,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2206. [2021-06-05 13:43:52,776 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 13:43:52,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 6767 transitions. [2021-06-05 13:43:52,780 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 6767 transitions. Word has length 21 [2021-06-05 13:43:52,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:52,780 INFO L482 AbstractCegarLoop]: Abstraction has 2206 states and 6767 transitions. [2021-06-05 13:43:52,780 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 13:43:52,780 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 6767 transitions. [2021-06-05 13:43:52,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:52,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:52,782 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:52,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-05 13:43:52,987 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:52,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:52,987 INFO L82 PathProgramCache]: Analyzing trace with hash 919441723, now seen corresponding path program 176 times [2021-06-05 13:43:52,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:52,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740792491] [2021-06-05 13:43:52,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:53,079 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 13:43:53,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:53,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740792491] [2021-06-05 13:43:53,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740792491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:53,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660978146] [2021-06-05 13:43:53,080 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 13:43:53,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:53,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:53,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:53,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:53,194 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 13:43:53,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660978146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:53,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:53,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-05 13:43:53,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113375454] [2021-06-05 13:43:53,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:53,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:53,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:53,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:53,195 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 13:43:53,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:53,444 INFO L93 Difference]: Finished difference Result 2375 states and 7031 transitions. [2021-06-05 13:43:53,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:43:53,445 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 13:43:53,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:53,448 INFO L225 Difference]: With dead ends: 2375 [2021-06-05 13:43:53,448 INFO L226 Difference]: Without dead ends: 2368 [2021-06-05 13:43:53,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 201.8ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:43:53,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2021-06-05 13:43:53,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 2208. [2021-06-05 13:43:53,466 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 13:43:53,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 6770 transitions. [2021-06-05 13:43:53,470 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 6770 transitions. Word has length 21 [2021-06-05 13:43:53,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:53,470 INFO L482 AbstractCegarLoop]: Abstraction has 2208 states and 6770 transitions. [2021-06-05 13:43:53,470 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 13:43:53,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 6770 transitions. [2021-06-05 13:43:53,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:53,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:53,472 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:53,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:53,672 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:53,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:53,672 INFO L82 PathProgramCache]: Analyzing trace with hash -420518503, now seen corresponding path program 177 times [2021-06-05 13:43:53,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:53,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397251379] [2021-06-05 13:43:53,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:53,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:53,759 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 13:43:53,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:53,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397251379] [2021-06-05 13:43:53,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397251379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:53,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842553817] [2021-06-05 13:43:53,760 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 13:43:53,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:43:53,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:53,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:53,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:53,917 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 13:43:53,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842553817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:53,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:53,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-06-05 13:43:53,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479882220] [2021-06-05 13:43:53,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:53,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:53,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:53,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:53,918 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 13:43:54,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:54,080 INFO L93 Difference]: Finished difference Result 2298 states and 6916 transitions. [2021-06-05 13:43:54,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:43:54,080 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 13:43:54,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:54,083 INFO L225 Difference]: With dead ends: 2298 [2021-06-05 13:43:54,083 INFO L226 Difference]: Without dead ends: 2285 [2021-06-05 13:43:54,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 196.0ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:43:54,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-05 13:43:54,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2196. [2021-06-05 13:43:54,104 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 13:43:54,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 6733 transitions. [2021-06-05 13:43:54,107 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 6733 transitions. Word has length 21 [2021-06-05 13:43:54,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:54,107 INFO L482 AbstractCegarLoop]: Abstraction has 2196 states and 6733 transitions. [2021-06-05 13:43:54,107 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 13:43:54,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 6733 transitions. [2021-06-05 13:43:54,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:54,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:54,109 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:54,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:54,310 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:54,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:54,310 INFO L82 PathProgramCache]: Analyzing trace with hash -666539009, now seen corresponding path program 178 times [2021-06-05 13:43:54,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:54,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978610445] [2021-06-05 13:43:54,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:54,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:54,410 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 13:43:54,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:54,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978610445] [2021-06-05 13:43:54,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978610445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:54,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833923444] [2021-06-05 13:43:54,411 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 13:43:54,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:54,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:54,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:54,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:54,524 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 13:43:54,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833923444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:54,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:54,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 13:43:54,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106327108] [2021-06-05 13:43:54,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:54,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:54,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:54,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:54,525 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 13:43:54,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:54,761 INFO L93 Difference]: Finished difference Result 2566 states and 7558 transitions. [2021-06-05 13:43:54,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:43:54,762 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 13:43:54,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:54,765 INFO L225 Difference]: With dead ends: 2566 [2021-06-05 13:43:54,765 INFO L226 Difference]: Without dead ends: 2549 [2021-06-05 13:43:54,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:43:54,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2021-06-05 13:43:54,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 2334. [2021-06-05 13:43:54,788 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 13:43:54,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 7168 transitions. [2021-06-05 13:43:54,791 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 7168 transitions. Word has length 21 [2021-06-05 13:43:54,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:54,791 INFO L482 AbstractCegarLoop]: Abstraction has 2334 states and 7168 transitions. [2021-06-05 13:43:54,791 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 13:43:54,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 7168 transitions. [2021-06-05 13:43:54,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:54,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:54,794 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:54,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:54,994 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:54,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:54,995 INFO L82 PathProgramCache]: Analyzing trace with hash 948163715, now seen corresponding path program 179 times [2021-06-05 13:43:54,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:54,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851131446] [2021-06-05 13:43:54,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:55,096 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 13:43:55,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:55,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851131446] [2021-06-05 13:43:55,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851131446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:55,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277378280] [2021-06-05 13:43:55,096 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 13:43:55,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:43:55,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:55,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:55,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:55,234 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 13:43:55,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277378280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:55,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:55,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 13:43:55,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037692462] [2021-06-05 13:43:55,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:55,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:55,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:55,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:55,235 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 13:43:55,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:55,437 INFO L93 Difference]: Finished difference Result 2564 states and 7531 transitions. [2021-06-05 13:43:55,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:43:55,437 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 13:43:55,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:55,439 INFO L225 Difference]: With dead ends: 2564 [2021-06-05 13:43:55,439 INFO L226 Difference]: Without dead ends: 2548 [2021-06-05 13:43:55,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 228.1ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:43:55,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-06-05 13:43:55,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 2315. [2021-06-05 13:43:55,460 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 13:43:55,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2315 states to 2315 states and 7097 transitions. [2021-06-05 13:43:55,463 INFO L78 Accepts]: Start accepts. Automaton has 2315 states and 7097 transitions. Word has length 21 [2021-06-05 13:43:55,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:55,463 INFO L482 AbstractCegarLoop]: Abstraction has 2315 states and 7097 transitions. [2021-06-05 13:43:55,463 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 13:43:55,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2315 states and 7097 transitions. [2021-06-05 13:43:55,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:55,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:55,466 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:55,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-05 13:43:55,666 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:55,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:55,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1131130113, now seen corresponding path program 180 times [2021-06-05 13:43:55,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:55,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18643199] [2021-06-05 13:43:55,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:55,760 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 13:43:55,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:55,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18643199] [2021-06-05 13:43:55,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18643199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:55,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925542193] [2021-06-05 13:43:55,761 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 13:43:55,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:43:55,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:55,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:55,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:55,900 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 13:43:55,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925542193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:55,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:55,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 13:43:55,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747642061] [2021-06-05 13:43:55,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:55,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:55,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:55,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:55,901 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 13:43:56,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:56,150 INFO L93 Difference]: Finished difference Result 2571 states and 7503 transitions. [2021-06-05 13:43:56,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:43:56,151 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 13:43:56,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:56,154 INFO L225 Difference]: With dead ends: 2571 [2021-06-05 13:43:56,154 INFO L226 Difference]: Without dead ends: 2553 [2021-06-05 13:43:56,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 232.0ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:43:56,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-06-05 13:43:56,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2295. [2021-06-05 13:43:56,177 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 13:43:56,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 7022 transitions. [2021-06-05 13:43:56,181 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 7022 transitions. Word has length 21 [2021-06-05 13:43:56,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:56,181 INFO L482 AbstractCegarLoop]: Abstraction has 2295 states and 7022 transitions. [2021-06-05 13:43:56,181 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 13:43:56,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 7022 transitions. [2021-06-05 13:43:56,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:56,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:56,183 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:56,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-05 13:43:56,384 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:56,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:56,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1164729341, now seen corresponding path program 181 times [2021-06-05 13:43:56,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:56,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518008235] [2021-06-05 13:43:56,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:56,523 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 13:43:56,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:56,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518008235] [2021-06-05 13:43:56,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518008235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:56,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652303354] [2021-06-05 13:43:56,523 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 13:43:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:56,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:56,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:56,652 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 13:43:56,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652303354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:56,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:56,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 13:43:56,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217352623] [2021-06-05 13:43:56,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:56,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:56,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:56,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:56,653 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 13:43:56,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:56,906 INFO L93 Difference]: Finished difference Result 2576 states and 7464 transitions. [2021-06-05 13:43:56,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:43:56,906 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 13:43:56,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:56,909 INFO L225 Difference]: With dead ends: 2576 [2021-06-05 13:43:56,909 INFO L226 Difference]: Without dead ends: 2556 [2021-06-05 13:43:56,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 252.7ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:43:56,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-06-05 13:43:56,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2276. [2021-06-05 13:43:56,930 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 13:43:56,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 6954 transitions. [2021-06-05 13:43:56,933 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 6954 transitions. Word has length 21 [2021-06-05 13:43:56,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:56,933 INFO L482 AbstractCegarLoop]: Abstraction has 2276 states and 6954 transitions. [2021-06-05 13:43:56,933 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 13:43:56,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 6954 transitions. [2021-06-05 13:43:56,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:56,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:56,935 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:57,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-06-05 13:43:57,136 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:57,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:57,136 INFO L82 PathProgramCache]: Analyzing trace with hash 2088661887, now seen corresponding path program 182 times [2021-06-05 13:43:57,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:57,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886759648] [2021-06-05 13:43:57,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:57,236 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 13:43:57,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:57,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886759648] [2021-06-05 13:43:57,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886759648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:57,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180439649] [2021-06-05 13:43:57,236 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 13:43:57,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:43:57,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:57,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:57,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:57,351 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 13:43:57,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180439649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:57,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:57,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 13:43:57,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934999076] [2021-06-05 13:43:57,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:57,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:57,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:57,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:57,352 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 13:43:57,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:57,660 INFO L93 Difference]: Finished difference Result 2488 states and 7287 transitions. [2021-06-05 13:43:57,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:43:57,660 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 13:43:57,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:57,663 INFO L225 Difference]: With dead ends: 2488 [2021-06-05 13:43:57,663 INFO L226 Difference]: Without dead ends: 2466 [2021-06-05 13:43:57,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 240.8ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:43:57,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2021-06-05 13:43:57,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 2256. [2021-06-05 13:43:57,693 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 13:43:57,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6899 transitions. [2021-06-05 13:43:57,696 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6899 transitions. Word has length 21 [2021-06-05 13:43:57,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:57,696 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 6899 transitions. [2021-06-05 13:43:57,696 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 13:43:57,696 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6899 transitions. [2021-06-05 13:43:57,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:57,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:57,698 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:57,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 13:43:57,899 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:57,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:57,899 INFO L82 PathProgramCache]: Analyzing trace with hash -135425149, now seen corresponding path program 183 times [2021-06-05 13:43:57,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:57,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919814328] [2021-06-05 13:43:57,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:57,997 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 13:43:57,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:57,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919814328] [2021-06-05 13:43:57,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919814328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:57,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447261107] [2021-06-05 13:43:57,998 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 13:43:58,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:43:58,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:58,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:58,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:58,120 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 13:43:58,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447261107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:58,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:58,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 13:43:58,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164874446] [2021-06-05 13:43:58,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:58,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:58,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:58,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:58,121 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 13:43:58,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:58,383 INFO L93 Difference]: Finished difference Result 2408 states and 7132 transitions. [2021-06-05 13:43:58,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:43:58,383 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 13:43:58,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:58,386 INFO L225 Difference]: With dead ends: 2408 [2021-06-05 13:43:58,386 INFO L226 Difference]: Without dead ends: 2401 [2021-06-05 13:43:58,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 230.5ms TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:43:58,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2021-06-05 13:43:58,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 2266. [2021-06-05 13:43:58,407 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 13:43:58,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2266 states to 2266 states and 6914 transitions. [2021-06-05 13:43:58,411 INFO L78 Accepts]: Start accepts. Automaton has 2266 states and 6914 transitions. Word has length 21 [2021-06-05 13:43:58,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:58,411 INFO L482 AbstractCegarLoop]: Abstraction has 2266 states and 6914 transitions. [2021-06-05 13:43:58,411 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 13:43:58,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2266 states and 6914 transitions. [2021-06-05 13:43:58,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:58,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:58,413 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:58,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:58,613 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:58,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:58,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1867189759, now seen corresponding path program 184 times [2021-06-05 13:43:58,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:58,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521473278] [2021-06-05 13:43:58,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:58,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:58,710 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 13:43:58,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:58,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521473278] [2021-06-05 13:43:58,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521473278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:58,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106435620] [2021-06-05 13:43:58,711 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 13:43:58,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:43:58,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:58,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:58,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:58,843 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 13:43:58,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106435620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:58,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:58,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-06-05 13:43:58,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404991952] [2021-06-05 13:43:58,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:58,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:58,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:58,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:58,844 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 13:43:59,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:59,009 INFO L93 Difference]: Finished difference Result 2482 states and 7361 transitions. [2021-06-05 13:43:59,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:43:59,009 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 13:43:59,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:59,012 INFO L225 Difference]: With dead ends: 2482 [2021-06-05 13:43:59,012 INFO L226 Difference]: Without dead ends: 2472 [2021-06-05 13:43:59,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 204.4ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:43:59,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-06-05 13:43:59,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2293. [2021-06-05 13:43:59,033 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 13:43:59,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 7010 transitions. [2021-06-05 13:43:59,037 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 7010 transitions. Word has length 21 [2021-06-05 13:43:59,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:59,037 INFO L482 AbstractCegarLoop]: Abstraction has 2293 states and 7010 transitions. [2021-06-05 13:43:59,037 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 13:43:59,037 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 7010 transitions. [2021-06-05 13:43:59,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:59,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:59,039 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:59,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:59,240 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:59,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:59,240 INFO L82 PathProgramCache]: Analyzing trace with hash -813074813, now seen corresponding path program 185 times [2021-06-05 13:43:59,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:59,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743793331] [2021-06-05 13:43:59,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:59,341 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 13:43:59,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:59,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743793331] [2021-06-05 13:43:59,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743793331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:59,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964424349] [2021-06-05 13:43:59,342 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 13:43:59,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:43:59,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:59,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:59,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:43:59,474 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 13:43:59,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964424349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:59,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:43:59,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-06-05 13:43:59,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292443763] [2021-06-05 13:43:59,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:43:59,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:43:59,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:43:59,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:43:59,475 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 13:43:59,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:43:59,648 INFO L93 Difference]: Finished difference Result 2464 states and 7323 transitions. [2021-06-05 13:43:59,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:43:59,648 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 13:43:59,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:43:59,651 INFO L225 Difference]: With dead ends: 2464 [2021-06-05 13:43:59,651 INFO L226 Difference]: Without dead ends: 2457 [2021-06-05 13:43:59,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 199.7ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:43:59,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-06-05 13:43:59,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2291. [2021-06-05 13:43:59,671 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 13:43:59,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 7002 transitions. [2021-06-05 13:43:59,674 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 7002 transitions. Word has length 21 [2021-06-05 13:43:59,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:43:59,674 INFO L482 AbstractCegarLoop]: Abstraction has 2291 states and 7002 transitions. [2021-06-05 13:43:59,674 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 13:43:59,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 7002 transitions. [2021-06-05 13:43:59,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:43:59,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:43:59,676 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:43:59,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable342,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:43:59,877 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:43:59,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:43:59,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1856322731, now seen corresponding path program 186 times [2021-06-05 13:43:59,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:43:59,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415239879] [2021-06-05 13:43:59,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:43:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:43:59,966 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 13:43:59,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:43:59,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415239879] [2021-06-05 13:43:59,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415239879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:43:59,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565765881] [2021-06-05 13:43:59,966 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 13:43:59,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:43:59,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:43:59,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:43:59,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:00,100 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 13:44:00,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565765881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:00,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:00,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-06-05 13:44:00,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524619516] [2021-06-05 13:44:00,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:00,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:00,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:00,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:00,101 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 13:44:00,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:00,247 INFO L93 Difference]: Finished difference Result 2417 states and 7217 transitions. [2021-06-05 13:44:00,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:44:00,248 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 13:44:00,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:00,250 INFO L225 Difference]: With dead ends: 2417 [2021-06-05 13:44:00,250 INFO L226 Difference]: Without dead ends: 2410 [2021-06-05 13:44:00,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 191.6ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:44:00,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-06-05 13:44:00,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 2290. [2021-06-05 13:44:00,269 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 13:44:00,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2290 states to 2290 states and 6999 transitions. [2021-06-05 13:44:00,272 INFO L78 Accepts]: Start accepts. Automaton has 2290 states and 6999 transitions. Word has length 21 [2021-06-05 13:44:00,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:00,272 INFO L482 AbstractCegarLoop]: Abstraction has 2290 states and 6999 transitions. [2021-06-05 13:44:00,272 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 13:44:00,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2290 states and 6999 transitions. [2021-06-05 13:44:00,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:00,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:00,274 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:00,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-05 13:44:00,475 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:00,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:00,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1191597057, now seen corresponding path program 187 times [2021-06-05 13:44:00,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:00,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99225177] [2021-06-05 13:44:00,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:00,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:00,569 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 13:44:00,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:00,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99225177] [2021-06-05 13:44:00,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99225177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:00,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766064926] [2021-06-05 13:44:00,569 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 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 13:44:00,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:00,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:44:00,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:00,695 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 13:44:00,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766064926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:00,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:00,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 13:44:00,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270904054] [2021-06-05 13:44:00,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:44:00,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:00,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:44:00,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:44:00,696 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 13:44:00,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:00,859 INFO L93 Difference]: Finished difference Result 2563 states and 7583 transitions. [2021-06-05 13:44:00,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:44:00,859 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 13:44:00,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:00,862 INFO L225 Difference]: With dead ends: 2563 [2021-06-05 13:44:00,863 INFO L226 Difference]: Without dead ends: 2553 [2021-06-05 13:44:00,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 198.1ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:44:00,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-06-05 13:44:00,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2331. [2021-06-05 13:44:00,883 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 13:44:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 7141 transitions. [2021-06-05 13:44:00,886 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 7141 transitions. Word has length 21 [2021-06-05 13:44:00,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:00,887 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 7141 transitions. [2021-06-05 13:44:00,887 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 13:44:00,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 7141 transitions. [2021-06-05 13:44:00,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:00,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:00,889 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:01,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-06-05 13:44:01,089 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:01,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:01,090 INFO L82 PathProgramCache]: Analyzing trace with hash 423105667, now seen corresponding path program 188 times [2021-06-05 13:44:01,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:01,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526840888] [2021-06-05 13:44:01,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:01,195 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 13:44:01,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:01,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526840888] [2021-06-05 13:44:01,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526840888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:01,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279856784] [2021-06-05 13:44:01,196 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 13:44:01,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:01,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:01,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:44:01,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:01,323 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 13:44:01,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279856784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:01,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:01,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 13:44:01,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775231655] [2021-06-05 13:44:01,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:44:01,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:01,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:44:01,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:44:01,324 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 13:44:01,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:01,508 INFO L93 Difference]: Finished difference Result 2544 states and 7541 transitions. [2021-06-05 13:44:01,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:44:01,509 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 13:44:01,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:01,511 INFO L225 Difference]: With dead ends: 2544 [2021-06-05 13:44:01,511 INFO L226 Difference]: Without dead ends: 2537 [2021-06-05 13:44:01,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 212.9ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:44:01,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2021-06-05 13:44:01,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 2328. [2021-06-05 13:44:01,530 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 13:44:01,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 7129 transitions. [2021-06-05 13:44:01,534 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 7129 transitions. Word has length 21 [2021-06-05 13:44:01,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:01,534 INFO L482 AbstractCegarLoop]: Abstraction has 2328 states and 7129 transitions. [2021-06-05 13:44:01,534 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 13:44:01,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 7129 transitions. [2021-06-05 13:44:01,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:01,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:01,536 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:01,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:01,736 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:01,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:01,737 INFO L82 PathProgramCache]: Analyzing trace with hash -620142251, now seen corresponding path program 189 times [2021-06-05 13:44:01,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:01,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664234289] [2021-06-05 13:44:01,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:01,821 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 13:44:01,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:01,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664234289] [2021-06-05 13:44:01,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664234289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:01,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198981315] [2021-06-05 13:44:01,821 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 13:44:01,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:44:01,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:01,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:44:01,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:01,942 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 13:44:01,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198981315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:01,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:01,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 13:44:01,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267804487] [2021-06-05 13:44:01,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:01,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:01,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:01,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:01,943 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 13:44:02,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:02,130 INFO L93 Difference]: Finished difference Result 2523 states and 7485 transitions. [2021-06-05 13:44:02,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:44:02,130 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 13:44:02,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:02,133 INFO L225 Difference]: With dead ends: 2523 [2021-06-05 13:44:02,133 INFO L226 Difference]: Without dead ends: 2510 [2021-06-05 13:44:02,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 184.2ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:44:02,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2021-06-05 13:44:02,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 2329. [2021-06-05 13:44:02,154 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 13:44:02,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 7127 transitions. [2021-06-05 13:44:02,158 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 7127 transitions. Word has length 21 [2021-06-05 13:44:02,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:02,158 INFO L482 AbstractCegarLoop]: Abstraction has 2329 states and 7127 transitions. [2021-06-05 13:44:02,158 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 13:44:02,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 7127 transitions. [2021-06-05 13:44:02,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:02,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:02,160 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:02,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-06-05 13:44:02,381 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:02,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:02,381 INFO L82 PathProgramCache]: Analyzing trace with hash -84912449, now seen corresponding path program 190 times [2021-06-05 13:44:02,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:02,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523647206] [2021-06-05 13:44:02,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:02,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:02,469 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 13:44:02,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:02,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523647206] [2021-06-05 13:44:02,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523647206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:02,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194295295] [2021-06-05 13:44:02,470 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 13:44:02,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:02,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:02,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:44:02,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:02,593 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 13:44:02,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194295295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:02,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:02,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 13:44:02,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613543522] [2021-06-05 13:44:02,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:02,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:02,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:02,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:02,594 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 13:44:02,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:02,803 INFO L93 Difference]: Finished difference Result 2467 states and 7353 transitions. [2021-06-05 13:44:02,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:44:02,803 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 13:44:02,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:02,806 INFO L225 Difference]: With dead ends: 2467 [2021-06-05 13:44:02,806 INFO L226 Difference]: Without dead ends: 2460 [2021-06-05 13:44:02,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 203.3ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:44:02,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-06-05 13:44:02,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2327. [2021-06-05 13:44:02,827 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 13:44:02,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2327 states to 2327 states and 7121 transitions. [2021-06-05 13:44:02,830 INFO L78 Accepts]: Start accepts. Automaton has 2327 states and 7121 transitions. Word has length 21 [2021-06-05 13:44:02,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:02,830 INFO L482 AbstractCegarLoop]: Abstraction has 2327 states and 7121 transitions. [2021-06-05 13:44:02,831 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 13:44:02,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2327 states and 7121 transitions. [2021-06-05 13:44:02,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:02,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:02,833 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:03,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:03,033 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:03,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:03,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1303821513, now seen corresponding path program 191 times [2021-06-05 13:44:03,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:03,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79304232] [2021-06-05 13:44:03,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:03,120 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 13:44:03,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:03,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79304232] [2021-06-05 13:44:03,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79304232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:03,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307235001] [2021-06-05 13:44:03,121 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 13:44:03,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:44:03,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:03,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:44:03,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:03,242 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 13:44:03,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307235001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:03,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:03,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 13:44:03,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960105452] [2021-06-05 13:44:03,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:03,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:03,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:03,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:03,242 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 13:44:03,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:03,422 INFO L93 Difference]: Finished difference Result 2438 states and 7310 transitions. [2021-06-05 13:44:03,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:44:03,422 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 13:44:03,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:03,425 INFO L225 Difference]: With dead ends: 2438 [2021-06-05 13:44:03,425 INFO L226 Difference]: Without dead ends: 2422 [2021-06-05 13:44:03,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 193.2ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:44:03,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-06-05 13:44:03,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 2317. [2021-06-05 13:44:03,447 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 13:44:03,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 7091 transitions. [2021-06-05 13:44:03,451 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 7091 transitions. Word has length 21 [2021-06-05 13:44:03,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:03,451 INFO L482 AbstractCegarLoop]: Abstraction has 2317 states and 7091 transitions. [2021-06-05 13:44:03,451 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 13:44:03,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 7091 transitions. [2021-06-05 13:44:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:03,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:03,454 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:03,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:03,654 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:03,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:03,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1524707841, now seen corresponding path program 192 times [2021-06-05 13:44:03,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:03,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973506580] [2021-06-05 13:44:03,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:03,742 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 13:44:03,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:03,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973506580] [2021-06-05 13:44:03,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973506580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:03,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176671940] [2021-06-05 13:44:03,742 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 13:44:03,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:44:03,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:03,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:44:03,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:03,853 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 13:44:03,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176671940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:03,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:03,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-05 13:44:03,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628323647] [2021-06-05 13:44:03,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:03,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:03,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:03,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:03,854 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 13:44:04,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:04,032 INFO L93 Difference]: Finished difference Result 2637 states and 7762 transitions. [2021-06-05 13:44:04,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:44:04,032 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 13:44:04,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:04,035 INFO L225 Difference]: With dead ends: 2637 [2021-06-05 13:44:04,035 INFO L226 Difference]: Without dead ends: 2627 [2021-06-05 13:44:04,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 175.2ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:44:04,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2627 states. [2021-06-05 13:44:04,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2627 to 2365. [2021-06-05 13:44:04,057 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 13:44:04,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 7257 transitions. [2021-06-05 13:44:04,060 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 7257 transitions. Word has length 21 [2021-06-05 13:44:04,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:04,060 INFO L482 AbstractCegarLoop]: Abstraction has 2365 states and 7257 transitions. [2021-06-05 13:44:04,060 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 13:44:04,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 7257 transitions. [2021-06-05 13:44:04,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:04,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:04,062 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:04,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:04,263 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:04,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:04,263 INFO L82 PathProgramCache]: Analyzing trace with hash 89994883, now seen corresponding path program 193 times [2021-06-05 13:44:04,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:04,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402768423] [2021-06-05 13:44:04,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:04,368 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 13:44:04,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:04,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402768423] [2021-06-05 13:44:04,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402768423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:04,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037937115] [2021-06-05 13:44:04,369 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 13:44:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:04,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:44:04,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:04,477 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 13:44:04,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037937115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:04,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:04,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-05 13:44:04,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242256123] [2021-06-05 13:44:04,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:04,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:04,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:04,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:04,478 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 13:44:04,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:04,645 INFO L93 Difference]: Finished difference Result 2621 states and 7728 transitions. [2021-06-05 13:44:04,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:44:04,646 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 13:44:04,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:04,648 INFO L225 Difference]: With dead ends: 2621 [2021-06-05 13:44:04,649 INFO L226 Difference]: Without dead ends: 2614 [2021-06-05 13:44:04,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 181.4ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:44:04,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2021-06-05 13:44:04,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 2358. [2021-06-05 13:44:04,671 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 13:44:04,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2358 states to 2358 states and 7233 transitions. [2021-06-05 13:44:04,674 INFO L78 Accepts]: Start accepts. Automaton has 2358 states and 7233 transitions. Word has length 21 [2021-06-05 13:44:04,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:04,674 INFO L482 AbstractCegarLoop]: Abstraction has 2358 states and 7233 transitions. [2021-06-05 13:44:04,674 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 13:44:04,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2358 states and 7233 transitions. [2021-06-05 13:44:04,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:04,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:04,677 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:04,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 13:44:04,877 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:04,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:04,877 INFO L82 PathProgramCache]: Analyzing trace with hash -953253035, now seen corresponding path program 194 times [2021-06-05 13:44:04,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:04,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121379338] [2021-06-05 13:44:04,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:04,979 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 13:44:04,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:04,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121379338] [2021-06-05 13:44:04,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121379338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:04,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370105265] [2021-06-05 13:44:04,979 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 13:44:05,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:05,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:05,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:44:05,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:05,097 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 13:44:05,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370105265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:05,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:05,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-05 13:44:05,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42904459] [2021-06-05 13:44:05,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:05,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:05,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:05,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:05,098 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 13:44:05,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:05,286 INFO L93 Difference]: Finished difference Result 2635 states and 7737 transitions. [2021-06-05 13:44:05,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:44:05,286 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 13:44:05,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:05,289 INFO L225 Difference]: With dead ends: 2635 [2021-06-05 13:44:05,289 INFO L226 Difference]: Without dead ends: 2622 [2021-06-05 13:44:05,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 201.8ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:44:05,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-06-05 13:44:05,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 2355. [2021-06-05 13:44:05,310 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 13:44:05,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 7220 transitions. [2021-06-05 13:44:05,314 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 7220 transitions. Word has length 21 [2021-06-05 13:44:05,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:05,314 INFO L482 AbstractCegarLoop]: Abstraction has 2355 states and 7220 transitions. [2021-06-05 13:44:05,314 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 13:44:05,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 7220 transitions. [2021-06-05 13:44:05,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:05,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:05,316 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:05,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-06-05 13:44:05,517 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:05,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:05,517 INFO L82 PathProgramCache]: Analyzing trace with hash -418023233, now seen corresponding path program 195 times [2021-06-05 13:44:05,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:05,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445275500] [2021-06-05 13:44:05,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:05,606 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 13:44:05,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:05,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445275500] [2021-06-05 13:44:05,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445275500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:05,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415168495] [2021-06-05 13:44:05,606 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 13:44:05,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:44:05,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:05,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:44:05,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:05,723 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 13:44:05,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415168495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:05,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:05,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-05 13:44:05,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594736936] [2021-06-05 13:44:05,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:05,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:05,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:05,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:05,724 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 13:44:05,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:05,946 INFO L93 Difference]: Finished difference Result 2598 states and 7655 transitions. [2021-06-05 13:44:05,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:44:05,946 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 13:44:05,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:05,949 INFO L225 Difference]: With dead ends: 2598 [2021-06-05 13:44:05,949 INFO L226 Difference]: Without dead ends: 2582 [2021-06-05 13:44:05,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 205.7ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:44:05,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2021-06-05 13:44:05,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 2352. [2021-06-05 13:44:05,971 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 13:44:05,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 7208 transitions. [2021-06-05 13:44:05,975 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 7208 transitions. Word has length 21 [2021-06-05 13:44:05,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:05,975 INFO L482 AbstractCegarLoop]: Abstraction has 2352 states and 7208 transitions. [2021-06-05 13:44:05,975 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 13:44:05,975 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 7208 transitions. [2021-06-05 13:44:05,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:05,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:05,977 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:06,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:06,178 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:06,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:06,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1005768555, now seen corresponding path program 196 times [2021-06-05 13:44:06,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:06,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414066153] [2021-06-05 13:44:06,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:06,271 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 13:44:06,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:06,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414066153] [2021-06-05 13:44:06,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414066153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:06,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941947912] [2021-06-05 13:44:06,272 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 13:44:06,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:06,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:06,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:44:06,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:06,391 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 13:44:06,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941947912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:06,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:06,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-05 13:44:06,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672028061] [2021-06-05 13:44:06,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:44:06,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:06,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:44:06,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:06,391 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 13:44:06,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:06,641 INFO L93 Difference]: Finished difference Result 2537 states and 7524 transitions. [2021-06-05 13:44:06,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:44:06,641 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 13:44:06,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:06,643 INFO L225 Difference]: With dead ends: 2537 [2021-06-05 13:44:06,643 INFO L226 Difference]: Without dead ends: 2530 [2021-06-05 13:44:06,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 204.9ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:44:06,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-06-05 13:44:06,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2349. [2021-06-05 13:44:06,664 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 13:44:06,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 7199 transitions. [2021-06-05 13:44:06,667 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 7199 transitions. Word has length 21 [2021-06-05 13:44:06,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:06,667 INFO L482 AbstractCegarLoop]: Abstraction has 2349 states and 7199 transitions. [2021-06-05 13:44:06,667 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 13:44:06,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 7199 transitions. [2021-06-05 13:44:06,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:06,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:06,669 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:06,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-05 13:44:06,870 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:06,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:06,870 INFO L82 PathProgramCache]: Analyzing trace with hash 622856203, now seen corresponding path program 197 times [2021-06-05 13:44:06,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:06,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339775949] [2021-06-05 13:44:06,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:06,938 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 13:44:06,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:06,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339775949] [2021-06-05 13:44:06,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339775949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:06,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424896531] [2021-06-05 13:44:06,939 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 13:44:06,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:44:06,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:06,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:06,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:07,040 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 13:44:07,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424896531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:07,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:07,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-05 13:44:07,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619087494] [2021-06-05 13:44:07,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:44:07,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:07,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:44:07,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:44:07,041 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 13:44:07,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:07,152 INFO L93 Difference]: Finished difference Result 3357 states and 10057 transitions. [2021-06-05 13:44:07,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:44:07,153 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 13:44:07,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:07,156 INFO L225 Difference]: With dead ends: 3357 [2021-06-05 13:44:07,156 INFO L226 Difference]: Without dead ends: 3337 [2021-06-05 13:44:07,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=225, Invalid=645, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:44:07,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3337 states. [2021-06-05 13:44:07,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3337 to 2344. [2021-06-05 13:44:07,179 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 13:44:07,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 7189 transitions. [2021-06-05 13:44:07,182 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 7189 transitions. Word has length 22 [2021-06-05 13:44:07,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:07,182 INFO L482 AbstractCegarLoop]: Abstraction has 2344 states and 7189 transitions. [2021-06-05 13:44:07,182 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 13:44:07,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 7189 transitions. [2021-06-05 13:44:07,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:07,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:07,184 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:07,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 13:44:07,385 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:07,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:07,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1555322853, now seen corresponding path program 198 times [2021-06-05 13:44:07,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:07,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395078762] [2021-06-05 13:44:07,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:07,438 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 13:44:07,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:07,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395078762] [2021-06-05 13:44:07,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395078762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:07,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730871341] [2021-06-05 13:44:07,438 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 13:44:07,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:44:07,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:07,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:07,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:07,530 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 13:44:07,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730871341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:07,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:07,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-05 13:44:07,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518664934] [2021-06-05 13:44:07,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:44:07,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:07,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:44:07,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:44:07,531 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 13:44:07,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:07,632 INFO L93 Difference]: Finished difference Result 3420 states and 10250 transitions. [2021-06-05 13:44:07,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:44:07,633 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 13:44:07,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:07,636 INFO L225 Difference]: With dead ends: 3420 [2021-06-05 13:44:07,636 INFO L226 Difference]: Without dead ends: 3420 [2021-06-05 13:44:07,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:44:07,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3420 states. [2021-06-05 13:44:07,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3420 to 2388. [2021-06-05 13:44:07,662 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 13:44:07,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 7321 transitions. [2021-06-05 13:44:07,666 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 7321 transitions. Word has length 22 [2021-06-05 13:44:07,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:07,666 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 7321 transitions. [2021-06-05 13:44:07,666 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 13:44:07,666 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 7321 transitions. [2021-06-05 13:44:07,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:07,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:07,668 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:07,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-06-05 13:44:07,869 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:07,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:07,869 INFO L82 PathProgramCache]: Analyzing trace with hash -167346353, now seen corresponding path program 199 times [2021-06-05 13:44:07,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:07,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035001332] [2021-06-05 13:44:07,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:07,928 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 13:44:07,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:07,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035001332] [2021-06-05 13:44:07,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035001332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:07,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434843717] [2021-06-05 13:44:07,929 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 13:44:07,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:07,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:07,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:08,031 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 13:44:08,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434843717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:08,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:08,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 13:44:08,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953611254] [2021-06-05 13:44:08,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:08,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:08,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:08,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:08,032 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 13:44:08,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:08,495 INFO L93 Difference]: Finished difference Result 4110 states and 12006 transitions. [2021-06-05 13:44:08,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 13:44:08,496 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 13:44:08,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:08,500 INFO L225 Difference]: With dead ends: 4110 [2021-06-05 13:44:08,500 INFO L226 Difference]: Without dead ends: 4102 [2021-06-05 13:44:08,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 402.2ms TimeCoverageRelationStatistics Valid=837, Invalid=1713, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 13:44:08,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2021-06-05 13:44:08,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 2823. [2021-06-05 13:44:08,537 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 13:44:08,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2823 states to 2823 states and 8782 transitions. [2021-06-05 13:44:08,541 INFO L78 Accepts]: Start accepts. Automaton has 2823 states and 8782 transitions. Word has length 22 [2021-06-05 13:44:08,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:08,542 INFO L482 AbstractCegarLoop]: Abstraction has 2823 states and 8782 transitions. [2021-06-05 13:44:08,542 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 13:44:08,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2823 states and 8782 transitions. [2021-06-05 13:44:08,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:08,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:08,545 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:08,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:08,745 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:08,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:08,745 INFO L82 PathProgramCache]: Analyzing trace with hash 404108453, now seen corresponding path program 200 times [2021-06-05 13:44:08,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:08,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559606062] [2021-06-05 13:44:08,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:08,849 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 13:44:08,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:08,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559606062] [2021-06-05 13:44:08,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559606062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:08,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679830349] [2021-06-05 13:44:08,849 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 13:44:08,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:08,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:08,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:08,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:08,951 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 13:44:08,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679830349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:08,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:08,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 13:44:08,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318618665] [2021-06-05 13:44:08,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:08,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:08,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:08,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:08,952 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 13:44:09,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:09,432 INFO L93 Difference]: Finished difference Result 4077 states and 11861 transitions. [2021-06-05 13:44:09,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 13:44:09,432 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 13:44:09,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:09,436 INFO L225 Difference]: With dead ends: 4077 [2021-06-05 13:44:09,436 INFO L226 Difference]: Without dead ends: 4071 [2021-06-05 13:44:09,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 466.0ms TimeCoverageRelationStatistics Valid=851, Invalid=2571, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 13:44:09,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2021-06-05 13:44:09,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 2645. [2021-06-05 13:44:09,467 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 13:44:09,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 8124 transitions. [2021-06-05 13:44:09,471 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 8124 transitions. Word has length 22 [2021-06-05 13:44:09,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:09,471 INFO L482 AbstractCegarLoop]: Abstraction has 2645 states and 8124 transitions. [2021-06-05 13:44:09,471 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 13:44:09,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 8124 transitions. [2021-06-05 13:44:09,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:09,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:09,473 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:09,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:09,674 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:09,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:09,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1527463093, now seen corresponding path program 201 times [2021-06-05 13:44:09,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:09,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739069840] [2021-06-05 13:44:09,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:09,727 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 13:44:09,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:09,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739069840] [2021-06-05 13:44:09,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739069840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:09,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463959428] [2021-06-05 13:44:09,728 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 13:44:09,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:44:09,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:09,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:09,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:09,829 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 13:44:09,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463959428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:09,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:09,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 13:44:09,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440816424] [2021-06-05 13:44:09,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:09,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:09,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:09,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:09,830 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 13:44:10,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:10,378 INFO L93 Difference]: Finished difference Result 3589 states and 10404 transitions. [2021-06-05 13:44:10,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 13:44:10,378 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 13:44:10,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:10,382 INFO L225 Difference]: With dead ends: 3589 [2021-06-05 13:44:10,382 INFO L226 Difference]: Without dead ends: 3589 [2021-06-05 13:44:10,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 455.9ms TimeCoverageRelationStatistics Valid=1188, Invalid=2118, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 13:44:10,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3589 states. [2021-06-05 13:44:10,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3589 to 2809. [2021-06-05 13:44:10,413 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 13:44:10,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 8688 transitions. [2021-06-05 13:44:10,417 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 8688 transitions. Word has length 22 [2021-06-05 13:44:10,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:10,417 INFO L482 AbstractCegarLoop]: Abstraction has 2809 states and 8688 transitions. [2021-06-05 13:44:10,417 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 13:44:10,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 8688 transitions. [2021-06-05 13:44:10,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:10,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:10,420 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:10,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:10,620 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:10,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:10,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1992054197, now seen corresponding path program 202 times [2021-06-05 13:44:10,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:10,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283794382] [2021-06-05 13:44:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:10,665 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 13:44:10,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:10,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283794382] [2021-06-05 13:44:10,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283794382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:10,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74919726] [2021-06-05 13:44:10,666 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 13:44:10,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:10,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:10,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:10,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:10,772 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 13:44:10,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74919726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:10,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:10,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 13:44:10,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610576609] [2021-06-05 13:44:10,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:10,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:10,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:10,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:10,773 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 13:44:11,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:11,310 INFO L93 Difference]: Finished difference Result 3314 states and 9794 transitions. [2021-06-05 13:44:11,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 13:44:11,310 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 13:44:11,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:11,314 INFO L225 Difference]: With dead ends: 3314 [2021-06-05 13:44:11,314 INFO L226 Difference]: Without dead ends: 3310 [2021-06-05 13:44:11,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 446.7ms TimeCoverageRelationStatistics Valid=1484, Invalid=2806, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 13:44:11,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2021-06-05 13:44:11,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 2519. [2021-06-05 13:44:11,349 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 13:44:11,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 7688 transitions. [2021-06-05 13:44:11,353 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 7688 transitions. Word has length 22 [2021-06-05 13:44:11,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:11,353 INFO L482 AbstractCegarLoop]: Abstraction has 2519 states and 7688 transitions. [2021-06-05 13:44:11,353 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 13:44:11,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 7688 transitions. [2021-06-05 13:44:11,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:11,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:11,355 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:11,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:11,556 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:11,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:11,556 INFO L82 PathProgramCache]: Analyzing trace with hash 939338255, now seen corresponding path program 203 times [2021-06-05 13:44:11,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:11,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137038242] [2021-06-05 13:44:11,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:11,600 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 13:44:11,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:11,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137038242] [2021-06-05 13:44:11,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137038242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:11,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54644757] [2021-06-05 13:44:11,600 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 13:44:11,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:44:11,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:11,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:11,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:11,701 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 13:44:11,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54644757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:11,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:11,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 13:44:11,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254906100] [2021-06-05 13:44:11,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:11,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:11,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:11,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:11,702 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 13:44:12,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:12,128 INFO L93 Difference]: Finished difference Result 3834 states and 11012 transitions. [2021-06-05 13:44:12,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 13:44:12,129 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 13:44:12,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:12,133 INFO L225 Difference]: With dead ends: 3834 [2021-06-05 13:44:12,133 INFO L226 Difference]: Without dead ends: 3825 [2021-06-05 13:44:12,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 366.7ms TimeCoverageRelationStatistics Valid=728, Invalid=2352, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 13:44:12,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3825 states. [2021-06-05 13:44:12,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3825 to 2573. [2021-06-05 13:44:12,165 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 13:44:12,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 7856 transitions. [2021-06-05 13:44:12,169 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 7856 transitions. Word has length 22 [2021-06-05 13:44:12,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:12,169 INFO L482 AbstractCegarLoop]: Abstraction has 2573 states and 7856 transitions. [2021-06-05 13:44:12,169 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 13:44:12,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 7856 transitions. [2021-06-05 13:44:12,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:12,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:12,171 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:12,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable384 [2021-06-05 13:44:12,372 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:12,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:12,372 INFO L82 PathProgramCache]: Analyzing trace with hash 351592933, now seen corresponding path program 204 times [2021-06-05 13:44:12,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:12,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515334168] [2021-06-05 13:44:12,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:12,417 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 13:44:12,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:12,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515334168] [2021-06-05 13:44:12,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515334168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:12,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366571345] [2021-06-05 13:44:12,417 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 13:44:12,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:44:12,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:12,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:12,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:12,519 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 13:44:12,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366571345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:12,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:12,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 13:44:12,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406825238] [2021-06-05 13:44:12,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:12,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:12,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:12,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:12,520 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 13:44:12,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:12,933 INFO L93 Difference]: Finished difference Result 3887 states and 11211 transitions. [2021-06-05 13:44:12,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 13:44:12,933 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 13:44:12,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:12,937 INFO L225 Difference]: With dead ends: 3887 [2021-06-05 13:44:12,937 INFO L226 Difference]: Without dead ends: 3875 [2021-06-05 13:44:12,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 347.4ms TimeCoverageRelationStatistics Valid=630, Invalid=2126, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 13:44:12,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3875 states. [2021-06-05 13:44:12,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3875 to 2597. [2021-06-05 13:44:12,965 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 13:44:12,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 7929 transitions. [2021-06-05 13:44:12,968 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 7929 transitions. Word has length 22 [2021-06-05 13:44:12,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:12,968 INFO L482 AbstractCegarLoop]: Abstraction has 2597 states and 7929 transitions. [2021-06-05 13:44:12,968 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 13:44:12,969 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 7929 transitions. [2021-06-05 13:44:12,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:12,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:12,971 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:13,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:13,175 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:13,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:13,176 INFO L82 PathProgramCache]: Analyzing trace with hash -688642865, now seen corresponding path program 205 times [2021-06-05 13:44:13,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:13,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778712150] [2021-06-05 13:44:13,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:13,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:13,220 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 13:44:13,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:13,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778712150] [2021-06-05 13:44:13,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778712150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:13,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205780216] [2021-06-05 13:44:13,220 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 13:44:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:13,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:13,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:13,320 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 13:44:13,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205780216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:13,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:13,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 13:44:13,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653341942] [2021-06-05 13:44:13,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:13,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:13,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:13,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:13,321 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 13:44:13,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:13,683 INFO L93 Difference]: Finished difference Result 3976 states and 11538 transitions. [2021-06-05 13:44:13,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 13:44:13,684 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 13:44:13,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:13,688 INFO L225 Difference]: With dead ends: 3976 [2021-06-05 13:44:13,688 INFO L226 Difference]: Without dead ends: 3961 [2021-06-05 13:44:13,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 319.9ms TimeCoverageRelationStatistics Valid=558, Invalid=1892, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 13:44:13,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3961 states. [2021-06-05 13:44:13,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3961 to 2615. [2021-06-05 13:44:13,719 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 13:44:13,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 7967 transitions. [2021-06-05 13:44:13,723 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 7967 transitions. Word has length 22 [2021-06-05 13:44:13,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:13,723 INFO L482 AbstractCegarLoop]: Abstraction has 2615 states and 7967 transitions. [2021-06-05 13:44:13,723 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 13:44:13,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 7967 transitions. [2021-06-05 13:44:13,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:13,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:13,725 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:13,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-05 13:44:13,926 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:13,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:13,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1423785765, now seen corresponding path program 206 times [2021-06-05 13:44:13,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:13,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50073197] [2021-06-05 13:44:13,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:13,968 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 13:44:13,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:13,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50073197] [2021-06-05 13:44:13,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50073197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:13,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489383008] [2021-06-05 13:44:13,969 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) [2021-06-05 13:44:13,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:13,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:13,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:13,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:14,073 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 13:44:14,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489383008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:14,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:14,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 13:44:14,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644269097] [2021-06-05 13:44:14,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:14,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:14,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:14,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:14,074 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 13:44:14,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:14,323 INFO L93 Difference]: Finished difference Result 3613 states and 10545 transitions. [2021-06-05 13:44:14,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 13:44:14,324 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 13:44:14,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:14,327 INFO L225 Difference]: With dead ends: 3613 [2021-06-05 13:44:14,327 INFO L226 Difference]: Without dead ends: 3598 [2021-06-05 13:44:14,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 258.8ms TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 13:44:14,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2021-06-05 13:44:14,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 2615. [2021-06-05 13:44:14,356 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 13:44:14,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 7962 transitions. [2021-06-05 13:44:14,360 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 7962 transitions. Word has length 22 [2021-06-05 13:44:14,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:14,360 INFO L482 AbstractCegarLoop]: Abstraction has 2615 states and 7962 transitions. [2021-06-05 13:44:14,360 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 13:44:14,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 7962 transitions. [2021-06-05 13:44:14,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:14,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:14,363 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:14,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-05 13:44:14,563 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:14,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:14,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1262577295, now seen corresponding path program 207 times [2021-06-05 13:44:14,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:14,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460864051] [2021-06-05 13:44:14,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:14,603 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 13:44:14,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:14,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460864051] [2021-06-05 13:44:14,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460864051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:14,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254874674] [2021-06-05 13:44:14,603 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 13:44:14,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:44:14,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:14,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:14,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:14,715 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 13:44:14,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254874674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:14,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:14,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 13:44:14,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534517032] [2021-06-05 13:44:14,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:14,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:14,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:14,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:14,716 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 13:44:15,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:15,206 INFO L93 Difference]: Finished difference Result 3520 states and 10061 transitions. [2021-06-05 13:44:15,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 13:44:15,206 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 13:44:15,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:15,210 INFO L225 Difference]: With dead ends: 3520 [2021-06-05 13:44:15,210 INFO L226 Difference]: Without dead ends: 3511 [2021-06-05 13:44:15,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 411.5ms TimeCoverageRelationStatistics Valid=1109, Invalid=1971, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 13:44:15,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-06-05 13:44:15,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2798. [2021-06-05 13:44:15,238 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 13:44:15,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 8582 transitions. [2021-06-05 13:44:15,242 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 8582 transitions. Word has length 22 [2021-06-05 13:44:15,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:15,242 INFO L482 AbstractCegarLoop]: Abstraction has 2798 states and 8582 transitions. [2021-06-05 13:44:15,242 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 13:44:15,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 8582 transitions. [2021-06-05 13:44:15,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:15,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:15,245 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:15,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable388,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:15,446 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:15,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:15,446 INFO L82 PathProgramCache]: Analyzing trace with hash 797986191, now seen corresponding path program 208 times [2021-06-05 13:44:15,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:15,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277064321] [2021-06-05 13:44:15,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:15,485 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 13:44:15,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:15,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277064321] [2021-06-05 13:44:15,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277064321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:15,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839169211] [2021-06-05 13:44:15,486 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 13:44:15,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:15,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:15,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:15,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:15,588 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 13:44:15,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839169211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:15,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:15,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 13:44:15,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106922084] [2021-06-05 13:44:15,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:15,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:15,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:15,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:15,589 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 13:44:16,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:16,169 INFO L93 Difference]: Finished difference Result 3291 states and 9479 transitions. [2021-06-05 13:44:16,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 13:44:16,169 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 13:44:16,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:16,172 INFO L225 Difference]: With dead ends: 3291 [2021-06-05 13:44:16,173 INFO L226 Difference]: Without dead ends: 3283 [2021-06-05 13:44:16,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 501.8ms TimeCoverageRelationStatistics Valid=1461, Invalid=2961, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 13:44:16,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-06-05 13:44:16,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2546. [2021-06-05 13:44:16,202 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 13:44:16,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 7729 transitions. [2021-06-05 13:44:16,207 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 7729 transitions. Word has length 22 [2021-06-05 13:44:16,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:16,207 INFO L482 AbstractCegarLoop]: Abstraction has 2546 states and 7729 transitions. [2021-06-05 13:44:16,207 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 13:44:16,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 7729 transitions. [2021-06-05 13:44:16,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:16,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:16,209 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:16,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 13:44:16,410 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:16,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:16,410 INFO L82 PathProgramCache]: Analyzing trace with hash 764386963, now seen corresponding path program 209 times [2021-06-05 13:44:16,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:16,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518033061] [2021-06-05 13:44:16,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:16,473 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 13:44:16,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:16,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518033061] [2021-06-05 13:44:16,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518033061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:16,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704449933] [2021-06-05 13:44:16,473 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 13:44:16,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:44:16,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:16,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:16,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:16,604 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 13:44:16,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704449933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:16,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:16,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 13:44:16,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925010964] [2021-06-05 13:44:16,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:44:16,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:16,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:44:16,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:44:16,605 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 13:44:17,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:17,140 INFO L93 Difference]: Finished difference Result 2975 states and 8569 transitions. [2021-06-05 13:44:17,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 13:44:17,141 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 13:44:17,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:17,143 INFO L225 Difference]: With dead ends: 2975 [2021-06-05 13:44:17,143 INFO L226 Difference]: Without dead ends: 2967 [2021-06-05 13:44:17,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 477.6ms TimeCoverageRelationStatistics Valid=1464, Invalid=3092, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 13:44:17,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2021-06-05 13:44:17,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 2564. [2021-06-05 13:44:17,170 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 13:44:17,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2564 states to 2564 states and 7786 transitions. [2021-06-05 13:44:17,174 INFO L78 Accepts]: Start accepts. Automaton has 2564 states and 7786 transitions. Word has length 22 [2021-06-05 13:44:17,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:17,174 INFO L482 AbstractCegarLoop]: Abstraction has 2564 states and 7786 transitions. [2021-06-05 13:44:17,175 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 13:44:17,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2564 states and 7786 transitions. [2021-06-05 13:44:17,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:17,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:17,177 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:17,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:17,378 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:17,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:17,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1854483403, now seen corresponding path program 210 times [2021-06-05 13:44:17,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:17,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162897929] [2021-06-05 13:44:17,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:17,413 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 13:44:17,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:17,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162897929] [2021-06-05 13:44:17,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162897929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:17,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559302709] [2021-06-05 13:44:17,413 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 13:44:17,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:44:17,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:17,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:17,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:17,520 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 13:44:17,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559302709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:17,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:17,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 13:44:17,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928656190] [2021-06-05 13:44:17,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:17,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:17,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:17,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:17,521 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 13:44:17,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:17,985 INFO L93 Difference]: Finished difference Result 3590 states and 10196 transitions. [2021-06-05 13:44:17,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 13:44:17,985 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 13:44:17,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:17,989 INFO L225 Difference]: With dead ends: 3590 [2021-06-05 13:44:17,989 INFO L226 Difference]: Without dead ends: 3575 [2021-06-05 13:44:17,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 387.9ms TimeCoverageRelationStatistics Valid=1038, Invalid=1824, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 13:44:17,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3575 states. [2021-06-05 13:44:18,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3575 to 2746. [2021-06-05 13:44:18,018 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 13:44:18,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2746 states to 2746 states and 8403 transitions. [2021-06-05 13:44:18,022 INFO L78 Accepts]: Start accepts. Automaton has 2746 states and 8403 transitions. Word has length 22 [2021-06-05 13:44:18,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:18,022 INFO L482 AbstractCegarLoop]: Abstraction has 2746 states and 8403 transitions. [2021-06-05 13:44:18,023 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 13:44:18,023 INFO L276 IsEmpty]: Start isEmpty. Operand 2746 states and 8403 transitions. [2021-06-05 13:44:18,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:18,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:18,025 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:18,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:18,226 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:18,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:18,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1389892299, now seen corresponding path program 211 times [2021-06-05 13:44:18,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:18,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330075295] [2021-06-05 13:44:18,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:18,261 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 13:44:18,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:18,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330075295] [2021-06-05 13:44:18,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330075295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:18,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444548010] [2021-06-05 13:44:18,261 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 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 13:44:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:18,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:18,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:18,398 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 13:44:18,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444548010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:18,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:18,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 13:44:18,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248109332] [2021-06-05 13:44:18,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:18,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:18,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:18,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:18,399 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 13:44:19,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:19,011 INFO L93 Difference]: Finished difference Result 3290 states and 9440 transitions. [2021-06-05 13:44:19,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 13:44:19,012 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 13:44:19,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:19,015 INFO L225 Difference]: With dead ends: 3290 [2021-06-05 13:44:19,015 INFO L226 Difference]: Without dead ends: 3284 [2021-06-05 13:44:19,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 523.4ms TimeCoverageRelationStatistics Valid=1537, Invalid=3293, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 13:44:19,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3284 states. [2021-06-05 13:44:19,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3284 to 2630. [2021-06-05 13:44:19,044 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 13:44:19,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 8003 transitions. [2021-06-05 13:44:19,048 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 8003 transitions. Word has length 22 [2021-06-05 13:44:19,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:19,048 INFO L482 AbstractCegarLoop]: Abstraction has 2630 states and 8003 transitions. [2021-06-05 13:44:19,048 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 13:44:19,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 8003 transitions. [2021-06-05 13:44:19,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:19,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:19,050 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:19,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:19,251 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:19,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:19,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1356293071, now seen corresponding path program 212 times [2021-06-05 13:44:19,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:19,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655950272] [2021-06-05 13:44:19,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:19,327 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 13:44:19,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:19,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655950272] [2021-06-05 13:44:19,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655950272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:19,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522433744] [2021-06-05 13:44:19,327 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 13:44:19,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:19,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:19,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:19,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:19,442 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 13:44:19,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522433744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:19,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:19,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 13:44:19,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011964266] [2021-06-05 13:44:19,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:44:19,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:19,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:44:19,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:44:19,443 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 13:44:20,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:20,019 INFO L93 Difference]: Finished difference Result 3240 states and 9276 transitions. [2021-06-05 13:44:20,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 13:44:20,019 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 13:44:20,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:20,022 INFO L225 Difference]: With dead ends: 3240 [2021-06-05 13:44:20,022 INFO L226 Difference]: Without dead ends: 3228 [2021-06-05 13:44:20,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 537.8ms TimeCoverageRelationStatistics Valid=1436, Invalid=3256, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 13:44:20,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2021-06-05 13:44:20,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2594. [2021-06-05 13:44:20,047 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 13:44:20,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 7904 transitions. [2021-06-05 13:44:20,050 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 7904 transitions. Word has length 22 [2021-06-05 13:44:20,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:20,051 INFO L482 AbstractCegarLoop]: Abstraction has 2594 states and 7904 transitions. [2021-06-05 13:44:20,051 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 13:44:20,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 7904 transitions. [2021-06-05 13:44:20,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:20,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:20,053 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:20,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:20,253 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:20,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:20,254 INFO L82 PathProgramCache]: Analyzing trace with hash 314717003, now seen corresponding path program 213 times [2021-06-05 13:44:20,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:20,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332463272] [2021-06-05 13:44:20,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:20,298 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 13:44:20,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:20,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332463272] [2021-06-05 13:44:20,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332463272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:20,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404404712] [2021-06-05 13:44:20,299 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 13:44:20,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:44:20,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:20,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:20,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:20,414 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 13:44:20,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404404712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:20,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:20,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 13:44:20,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778306071] [2021-06-05 13:44:20,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:44:20,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:20,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:44:20,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:44:20,415 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 13:44:20,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:20,938 INFO L93 Difference]: Finished difference Result 3083 states and 8911 transitions. [2021-06-05 13:44:20,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 13:44:20,938 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 13:44:20,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:20,941 INFO L225 Difference]: With dead ends: 3083 [2021-06-05 13:44:20,941 INFO L226 Difference]: Without dead ends: 3071 [2021-06-05 13:44:20,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 470.3ms TimeCoverageRelationStatistics Valid=1406, Invalid=3286, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 13:44:20,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2021-06-05 13:44:20,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 2614. [2021-06-05 13:44:20,965 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 13:44:20,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2614 states to 2614 states and 7970 transitions. [2021-06-05 13:44:20,968 INFO L78 Accepts]: Start accepts. Automaton has 2614 states and 7970 transitions. Word has length 22 [2021-06-05 13:44:20,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:20,968 INFO L482 AbstractCegarLoop]: Abstraction has 2614 states and 7970 transitions. [2021-06-05 13:44:20,968 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 13:44:20,969 INFO L276 IsEmpty]: Start isEmpty. Operand 2614 states and 7970 transitions. [2021-06-05 13:44:20,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:20,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:20,971 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:21,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:21,171 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:21,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:21,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1271263729, now seen corresponding path program 214 times [2021-06-05 13:44:21,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:21,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789409025] [2021-06-05 13:44:21,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:21,202 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 13:44:21,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:21,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789409025] [2021-06-05 13:44:21,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789409025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:21,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208312637] [2021-06-05 13:44:21,202 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 13:44:21,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:21,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:21,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:21,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:21,314 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 13:44:21,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208312637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:21,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:21,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 13:44:21,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536017716] [2021-06-05 13:44:21,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:21,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:21,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:21,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:21,315 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 13:44:21,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:21,773 INFO L93 Difference]: Finished difference Result 3813 states and 10862 transitions. [2021-06-05 13:44:21,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 13:44:21,774 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 13:44:21,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:21,778 INFO L225 Difference]: With dead ends: 3813 [2021-06-05 13:44:21,778 INFO L226 Difference]: Without dead ends: 3801 [2021-06-05 13:44:21,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 376.1ms TimeCoverageRelationStatistics Valid=966, Invalid=1686, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 13:44:21,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2021-06-05 13:44:21,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 2922. [2021-06-05 13:44:21,808 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 13:44:21,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 8970 transitions. [2021-06-05 13:44:21,813 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 8970 transitions. Word has length 22 [2021-06-05 13:44:21,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:21,813 INFO L482 AbstractCegarLoop]: Abstraction has 2922 states and 8970 transitions. [2021-06-05 13:44:21,813 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 13:44:21,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 8970 transitions. [2021-06-05 13:44:21,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:21,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:21,815 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:22,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:22,016 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:22,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:22,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1735854833, now seen corresponding path program 215 times [2021-06-05 13:44:22,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:22,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739897098] [2021-06-05 13:44:22,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:22,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:22,067 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 13:44:22,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:22,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739897098] [2021-06-05 13:44:22,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739897098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:22,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488086169] [2021-06-05 13:44:22,067 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 13:44:22,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:44:22,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:22,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:22,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:22,178 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 13:44:22,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488086169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:22,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:22,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 13:44:22,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959497352] [2021-06-05 13:44:22,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:22,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:22,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:22,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:22,179 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 13:44:22,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:22,826 INFO L93 Difference]: Finished difference Result 3570 states and 10279 transitions. [2021-06-05 13:44:22,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 13:44:22,827 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 13:44:22,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:22,831 INFO L225 Difference]: With dead ends: 3570 [2021-06-05 13:44:22,831 INFO L226 Difference]: Without dead ends: 3564 [2021-06-05 13:44:22,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 597.5ms TimeCoverageRelationStatistics Valid=1706, Invalid=3844, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 13:44:22,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-06-05 13:44:22,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2830. [2021-06-05 13:44:22,873 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 13:44:22,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2830 states to 2830 states and 8649 transitions. [2021-06-05 13:44:22,878 INFO L78 Accepts]: Start accepts. Automaton has 2830 states and 8649 transitions. Word has length 22 [2021-06-05 13:44:22,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:22,878 INFO L482 AbstractCegarLoop]: Abstraction has 2830 states and 8649 transitions. [2021-06-05 13:44:22,878 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 13:44:22,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2830 states and 8649 transitions. [2021-06-05 13:44:22,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:22,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:22,881 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:23,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable396 [2021-06-05 13:44:23,081 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:23,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:23,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1769454061, now seen corresponding path program 216 times [2021-06-05 13:44:23,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:23,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662219985] [2021-06-05 13:44:23,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:23,117 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 13:44:23,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:23,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662219985] [2021-06-05 13:44:23,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662219985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:23,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297127411] [2021-06-05 13:44:23,117 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 13:44:23,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:44:23,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:23,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:23,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:23,232 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 13:44:23,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297127411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:23,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:23,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 13:44:23,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948851982] [2021-06-05 13:44:23,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:44:23,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:23,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:44:23,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:44:23,233 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 13:44:23,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:23,844 INFO L93 Difference]: Finished difference Result 3572 states and 10299 transitions. [2021-06-05 13:44:23,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 13:44:23,845 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 13:44:23,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:23,848 INFO L225 Difference]: With dead ends: 3572 [2021-06-05 13:44:23,848 INFO L226 Difference]: Without dead ends: 3564 [2021-06-05 13:44:23,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 539.6ms TimeCoverageRelationStatistics Valid=1503, Invalid=3609, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 13:44:23,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-06-05 13:44:23,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2871. [2021-06-05 13:44:23,893 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 13:44:23,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2871 states to 2871 states and 8785 transitions. [2021-06-05 13:44:23,898 INFO L78 Accepts]: Start accepts. Automaton has 2871 states and 8785 transitions. Word has length 22 [2021-06-05 13:44:23,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:23,898 INFO L482 AbstractCegarLoop]: Abstraction has 2871 states and 8785 transitions. [2021-06-05 13:44:23,898 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 13:44:23,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2871 states and 8785 transitions. [2021-06-05 13:44:23,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:23,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:23,900 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:24,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-06-05 13:44:24,101 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:24,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:24,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1483937167, now seen corresponding path program 217 times [2021-06-05 13:44:24,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:24,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672917451] [2021-06-05 13:44:24,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:24,141 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 13:44:24,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:24,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672917451] [2021-06-05 13:44:24,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672917451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:24,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469974421] [2021-06-05 13:44:24,141 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 13:44:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:24,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:24,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:24,282 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 13:44:24,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469974421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:24,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:24,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 13:44:24,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590752332] [2021-06-05 13:44:24,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:44:24,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:24,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:44:24,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:44:24,283 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 13:44:24,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:24,881 INFO L93 Difference]: Finished difference Result 3644 states and 10545 transitions. [2021-06-05 13:44:24,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 13:44:24,882 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 13:44:24,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:24,885 INFO L225 Difference]: With dead ends: 3644 [2021-06-05 13:44:24,885 INFO L226 Difference]: Without dead ends: 3632 [2021-06-05 13:44:24,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 534.3ms TimeCoverageRelationStatistics Valid=1373, Invalid=3457, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 13:44:24,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3632 states. [2021-06-05 13:44:24,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3632 to 2921. [2021-06-05 13:44:24,917 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 13:44:24,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2921 states to 2921 states and 8966 transitions. [2021-06-05 13:44:24,921 INFO L78 Accepts]: Start accepts. Automaton has 2921 states and 8966 transitions. Word has length 22 [2021-06-05 13:44:24,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:24,921 INFO L482 AbstractCegarLoop]: Abstraction has 2921 states and 8966 transitions. [2021-06-05 13:44:24,921 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 13:44:24,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2921 states and 8966 transitions. [2021-06-05 13:44:24,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:24,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:24,924 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:25,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable398,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:25,125 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:25,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:25,125 INFO L82 PathProgramCache]: Analyzing trace with hash -740149869, now seen corresponding path program 218 times [2021-06-05 13:44:25,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:25,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189184675] [2021-06-05 13:44:25,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:25,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:25,221 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 13:44:25,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:25,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189184675] [2021-06-05 13:44:25,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189184675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:25,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795173433] [2021-06-05 13:44:25,221 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 13:44:25,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:25,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:25,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:25,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:25,345 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 13:44:25,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795173433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:25,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:25,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 13:44:25,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059661290] [2021-06-05 13:44:25,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:44:25,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:25,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:44:25,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:44:25,346 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 13:44:25,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:25,850 INFO L93 Difference]: Finished difference Result 3521 states and 10275 transitions. [2021-06-05 13:44:25,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 13:44:25,850 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 13:44:25,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:25,854 INFO L225 Difference]: With dead ends: 3521 [2021-06-05 13:44:25,854 INFO L226 Difference]: Without dead ends: 3505 [2021-06-05 13:44:25,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 505.9ms TimeCoverageRelationStatistics Valid=1314, Invalid=3378, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 13:44:25,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3505 states. [2021-06-05 13:44:25,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3505 to 2952. [2021-06-05 13:44:25,883 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 13:44:25,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 9060 transitions. [2021-06-05 13:44:25,888 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 9060 transitions. Word has length 22 [2021-06-05 13:44:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:25,888 INFO L482 AbstractCegarLoop]: Abstraction has 2952 states and 9060 transitions. [2021-06-05 13:44:25,888 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 13:44:25,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 9060 transitions. [2021-06-05 13:44:25,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:25,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:25,891 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:26,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 13:44:26,091 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:26,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:26,091 INFO L82 PathProgramCache]: Analyzing trace with hash 614822987, now seen corresponding path program 219 times [2021-06-05 13:44:26,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:26,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745049898] [2021-06-05 13:44:26,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:26,121 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 13:44:26,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:26,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745049898] [2021-06-05 13:44:26,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745049898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:26,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136433410] [2021-06-05 13:44:26,121 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 13:44:26,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:44:26,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:26,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:26,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:26,239 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 13:44:26,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136433410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:26,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:26,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-06-05 13:44:26,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167308410] [2021-06-05 13:44:26,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:26,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:26,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:26,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:26,240 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 13:44:26,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:26,724 INFO L93 Difference]: Finished difference Result 4650 states and 13519 transitions. [2021-06-05 13:44:26,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 13:44:26,724 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 13:44:26,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:26,729 INFO L225 Difference]: With dead ends: 4650 [2021-06-05 13:44:26,729 INFO L226 Difference]: Without dead ends: 4641 [2021-06-05 13:44:26,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 400.2ms TimeCoverageRelationStatistics Valid=950, Invalid=1702, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 13:44:26,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2021-06-05 13:44:26,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 3535. [2021-06-05 13:44:26,771 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 13:44:26,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 11014 transitions. [2021-06-05 13:44:26,776 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 11014 transitions. Word has length 22 [2021-06-05 13:44:26,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:26,776 INFO L482 AbstractCegarLoop]: Abstraction has 3535 states and 11014 transitions. [2021-06-05 13:44:26,776 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 13:44:26,776 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 11014 transitions. [2021-06-05 13:44:26,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:26,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:26,780 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:26,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 13:44:26,981 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:26,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:26,981 INFO L82 PathProgramCache]: Analyzing trace with hash 150231883, now seen corresponding path program 220 times [2021-06-05 13:44:26,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:26,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118223026] [2021-06-05 13:44:26,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:27,020 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 13:44:27,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:27,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118223026] [2021-06-05 13:44:27,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118223026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:27,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189602910] [2021-06-05 13:44:27,020 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 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 13:44:27,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:27,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:27,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:27,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:27,134 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 13:44:27,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189602910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:27,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:27,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-06-05 13:44:27,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940777396] [2021-06-05 13:44:27,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:27,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:27,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:27,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:27,135 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 13:44:27,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:27,923 INFO L93 Difference]: Finished difference Result 4324 states and 12650 transitions. [2021-06-05 13:44:27,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 13:44:27,923 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 13:44:27,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:27,927 INFO L225 Difference]: With dead ends: 4324 [2021-06-05 13:44:27,927 INFO L226 Difference]: Without dead ends: 4320 [2021-06-05 13:44:27,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2436 ImplicationChecksByTransitivity, 670.2ms TimeCoverageRelationStatistics Valid=1939, Invalid=4703, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 13:44:27,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4320 states. [2021-06-05 13:44:27,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4320 to 3452. [2021-06-05 13:44:27,967 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 13:44:27,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3452 states to 3452 states and 10715 transitions. [2021-06-05 13:44:27,972 INFO L78 Accepts]: Start accepts. Automaton has 3452 states and 10715 transitions. Word has length 22 [2021-06-05 13:44:27,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:27,972 INFO L482 AbstractCegarLoop]: Abstraction has 3452 states and 10715 transitions. [2021-06-05 13:44:27,972 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 13:44:27,972 INFO L276 IsEmpty]: Start isEmpty. Operand 3452 states and 10715 transitions. [2021-06-05 13:44:27,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:27,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:27,976 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:28,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-05 13:44:28,176 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:28,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:28,176 INFO L82 PathProgramCache]: Analyzing trace with hash 116632655, now seen corresponding path program 221 times [2021-06-05 13:44:28,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:28,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057708282] [2021-06-05 13:44:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:28,207 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 13:44:28,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:28,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057708282] [2021-06-05 13:44:28,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057708282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:28,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422051896] [2021-06-05 13:44:28,207 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 13:44:28,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:44:28,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:28,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:28,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:28,321 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 13:44:28,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422051896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:28,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:28,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 13:44:28,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952427149] [2021-06-05 13:44:28,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:44:28,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:28,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:44:28,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:44:28,322 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 13:44:29,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:29,015 INFO L93 Difference]: Finished difference Result 4399 states and 12968 transitions. [2021-06-05 13:44:29,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 13:44:29,016 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 13:44:29,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:29,021 INFO L225 Difference]: With dead ends: 4399 [2021-06-05 13:44:29,021 INFO L226 Difference]: Without dead ends: 4391 [2021-06-05 13:44:29,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2068 ImplicationChecksByTransitivity, 604.3ms TimeCoverageRelationStatistics Valid=1649, Invalid=4203, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 13:44:29,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4391 states. [2021-06-05 13:44:29,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4391 to 3540. [2021-06-05 13:44:29,062 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 13:44:29,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 11024 transitions. [2021-06-05 13:44:29,068 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 11024 transitions. Word has length 22 [2021-06-05 13:44:29,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:29,068 INFO L482 AbstractCegarLoop]: Abstraction has 3540 states and 11024 transitions. [2021-06-05 13:44:29,068 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 13:44:29,068 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 11024 transitions. [2021-06-05 13:44:29,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:29,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:29,071 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:29,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:29,272 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:29,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:29,272 INFO L82 PathProgramCache]: Analyzing trace with hash -924943413, now seen corresponding path program 222 times [2021-06-05 13:44:29,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:29,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921994453] [2021-06-05 13:44:29,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:29,309 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 13:44:29,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:29,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921994453] [2021-06-05 13:44:29,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921994453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:29,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740975672] [2021-06-05 13:44:29,309 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 13:44:29,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:44:29,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:29,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:29,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:29,435 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 13:44:29,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740975672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:29,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:29,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-05 13:44:29,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440424195] [2021-06-05 13:44:29,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:44:29,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:29,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:44:29,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:44:29,436 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 13:44:30,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:30,071 INFO L93 Difference]: Finished difference Result 4554 states and 13499 transitions. [2021-06-05 13:44:30,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 13:44:30,071 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 13:44:30,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:30,076 INFO L225 Difference]: With dead ends: 4554 [2021-06-05 13:44:30,076 INFO L226 Difference]: Without dead ends: 4542 [2021-06-05 13:44:30,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 568.2ms TimeCoverageRelationStatistics Valid=1425, Invalid=3831, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 13:44:30,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4542 states. [2021-06-05 13:44:30,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4542 to 3796. [2021-06-05 13:44:30,113 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 13:44:30,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 11878 transitions. [2021-06-05 13:44:30,119 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 11878 transitions. Word has length 22 [2021-06-05 13:44:30,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:30,119 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 11878 transitions. [2021-06-05 13:44:30,119 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 13:44:30,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 11878 transitions. [2021-06-05 13:44:30,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:30,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:30,122 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:30,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-05 13:44:30,323 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:30,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:30,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1145936847, now seen corresponding path program 223 times [2021-06-05 13:44:30,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:30,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203519987] [2021-06-05 13:44:30,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:30,364 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 13:44:30,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:30,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203519987] [2021-06-05 13:44:30,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203519987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:30,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854291608] [2021-06-05 13:44:30,365 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 13:44:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:30,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:30,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:30,487 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 13:44:30,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854291608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:30,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:30,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 13:44:30,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577512820] [2021-06-05 13:44:30,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:44:30,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:30,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:44:30,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:44:30,488 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 13:44:31,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:31,083 INFO L93 Difference]: Finished difference Result 4840 states and 14458 transitions. [2021-06-05 13:44:31,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 13:44:31,083 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 13:44:31,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:31,088 INFO L225 Difference]: With dead ends: 4840 [2021-06-05 13:44:31,088 INFO L226 Difference]: Without dead ends: 4824 [2021-06-05 13:44:31,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1567 ImplicationChecksByTransitivity, 530.6ms TimeCoverageRelationStatistics Valid=1272, Invalid=3558, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 13:44:31,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4824 states. [2021-06-05 13:44:31,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4824 to 4073. [2021-06-05 13:44:31,128 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 13:44:31,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4073 states to 4073 states and 12802 transitions. [2021-06-05 13:44:31,135 INFO L78 Accepts]: Start accepts. Automaton has 4073 states and 12802 transitions. Word has length 22 [2021-06-05 13:44:31,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:31,135 INFO L482 AbstractCegarLoop]: Abstraction has 4073 states and 12802 transitions. [2021-06-05 13:44:31,135 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 13:44:31,135 INFO L276 IsEmpty]: Start isEmpty. Operand 4073 states and 12802 transitions. [2021-06-05 13:44:31,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:31,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:31,139 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:31,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-05 13:44:31,345 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:31,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:31,345 INFO L82 PathProgramCache]: Analyzing trace with hash 918715467, now seen corresponding path program 224 times [2021-06-05 13:44:31,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:31,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603171276] [2021-06-05 13:44:31,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:31,393 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 13:44:31,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:31,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603171276] [2021-06-05 13:44:31,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603171276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:31,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613828626] [2021-06-05 13:44:31,393 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 13:44:31,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:31,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:31,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:31,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:31,531 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 13:44:31,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613828626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:31,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:31,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 13:44:31,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527627600] [2021-06-05 13:44:31,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:44:31,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:31,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:44:31,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:44:31,531 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 13:44:32,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:32,033 INFO L93 Difference]: Finished difference Result 4789 states and 14429 transitions. [2021-06-05 13:44:32,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 13:44:32,033 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 13:44:32,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:32,038 INFO L225 Difference]: With dead ends: 4789 [2021-06-05 13:44:32,038 INFO L226 Difference]: Without dead ends: 4769 [2021-06-05 13:44:32,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 494.8ms TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 13:44:32,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4769 states. [2021-06-05 13:44:32,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4769 to 4116. [2021-06-05 13:44:32,084 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 13:44:32,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4116 states to 4116 states and 12935 transitions. [2021-06-05 13:44:32,090 INFO L78 Accepts]: Start accepts. Automaton has 4116 states and 12935 transitions. Word has length 22 [2021-06-05 13:44:32,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:32,090 INFO L482 AbstractCegarLoop]: Abstraction has 4116 states and 12935 transitions. [2021-06-05 13:44:32,091 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 13:44:32,091 INFO L276 IsEmpty]: Start isEmpty. Operand 4116 states and 12935 transitions. [2021-06-05 13:44:32,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:32,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:32,094 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:32,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:32,295 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:32,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:32,295 INFO L82 PathProgramCache]: Analyzing trace with hash 124564107, now seen corresponding path program 225 times [2021-06-05 13:44:32,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:32,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381700488] [2021-06-05 13:44:32,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:32,340 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 13:44:32,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:32,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381700488] [2021-06-05 13:44:32,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381700488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:32,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456332561] [2021-06-05 13:44:32,340 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 13:44:32,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:44:32,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:32,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:32,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:32,426 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 13:44:32,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456332561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:32,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:32,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-05 13:44:32,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983788127] [2021-06-05 13:44:32,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:44:32,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:32,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:44:32,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:44:32,427 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 13:44:32,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:32,522 INFO L93 Difference]: Finished difference Result 4973 states and 15309 transitions. [2021-06-05 13:44:32,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:44:32,523 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 13:44:32,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:32,527 INFO L225 Difference]: With dead ends: 4973 [2021-06-05 13:44:32,527 INFO L226 Difference]: Without dead ends: 4973 [2021-06-05 13:44:32,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:44:32,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4973 states. [2021-06-05 13:44:32,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4973 to 4166. [2021-06-05 13:44:32,566 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 13:44:32,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4166 states to 4166 states and 13088 transitions. [2021-06-05 13:44:32,594 INFO L78 Accepts]: Start accepts. Automaton has 4166 states and 13088 transitions. Word has length 22 [2021-06-05 13:44:32,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:32,594 INFO L482 AbstractCegarLoop]: Abstraction has 4166 states and 13088 transitions. [2021-06-05 13:44:32,594 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 13:44:32,594 INFO L276 IsEmpty]: Start isEmpty. Operand 4166 states and 13088 transitions. [2021-06-05 13:44:32,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:32,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:32,598 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:32,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable406 [2021-06-05 13:44:32,799 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:32,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:32,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1397497815, now seen corresponding path program 226 times [2021-06-05 13:44:32,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:32,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553702828] [2021-06-05 13:44:32,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:32,845 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 13:44:32,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:32,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553702828] [2021-06-05 13:44:32,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553702828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:32,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839584532] [2021-06-05 13:44:32,845 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 13:44:32,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:32,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:32,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:32,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:32,938 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 13:44:32,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839584532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:32,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:32,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 13:44:32,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888578935] [2021-06-05 13:44:32,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:32,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:32,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:32,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:32,939 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 13:44:33,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:33,103 INFO L93 Difference]: Finished difference Result 4567 states and 14102 transitions. [2021-06-05 13:44:33,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:44:33,103 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 13:44:33,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:33,109 INFO L225 Difference]: With dead ends: 4567 [2021-06-05 13:44:33,109 INFO L226 Difference]: Without dead ends: 4567 [2021-06-05 13:44:33,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 156.6ms TimeCoverageRelationStatistics Valid=310, Invalid=620, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:44:33,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4567 states. [2021-06-05 13:44:33,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4567 to 4183. [2021-06-05 13:44:33,152 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 13:44:33,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 13139 transitions. [2021-06-05 13:44:33,158 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 13139 transitions. Word has length 22 [2021-06-05 13:44:33,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:33,159 INFO L482 AbstractCegarLoop]: Abstraction has 4183 states and 13139 transitions. [2021-06-05 13:44:33,159 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 13:44:33,159 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 13139 transitions. [2021-06-05 13:44:33,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:33,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:33,163 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:33,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:33,363 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:33,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:33,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1207526577, now seen corresponding path program 227 times [2021-06-05 13:44:33,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:33,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738575579] [2021-06-05 13:44:33,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:33,410 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 13:44:33,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:33,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738575579] [2021-06-05 13:44:33,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738575579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:33,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445717275] [2021-06-05 13:44:33,410 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 13:44:33,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:44:33,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:33,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:33,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:33,516 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 13:44:33,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445717275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:33,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:33,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 13:44:33,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698956431] [2021-06-05 13:44:33,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:33,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:33,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:33,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:33,517 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 13:44:33,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:33,776 INFO L93 Difference]: Finished difference Result 4690 states and 14429 transitions. [2021-06-05 13:44:33,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:44:33,776 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 13:44:33,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:33,780 INFO L225 Difference]: With dead ends: 4690 [2021-06-05 13:44:33,780 INFO L226 Difference]: Without dead ends: 4690 [2021-06-05 13:44:33,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 206.6ms TimeCoverageRelationStatistics Valid=435, Invalid=897, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:44:33,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4690 states. [2021-06-05 13:44:33,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4690 to 4200. [2021-06-05 13:44:33,817 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 13:44:33,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4200 states to 4200 states and 13190 transitions. [2021-06-05 13:44:33,823 INFO L78 Accepts]: Start accepts. Automaton has 4200 states and 13190 transitions. Word has length 22 [2021-06-05 13:44:33,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:33,823 INFO L482 AbstractCegarLoop]: Abstraction has 4200 states and 13190 transitions. [2021-06-05 13:44:33,823 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 13:44:33,823 INFO L276 IsEmpty]: Start isEmpty. Operand 4200 states and 13190 transitions. [2021-06-05 13:44:33,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:33,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:33,827 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:34,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-06-05 13:44:34,028 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:34,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:34,028 INFO L82 PathProgramCache]: Analyzing trace with hash -321728297, now seen corresponding path program 228 times [2021-06-05 13:44:34,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:34,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768270463] [2021-06-05 13:44:34,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:34,072 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 13:44:34,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:34,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768270463] [2021-06-05 13:44:34,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768270463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:34,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687164551] [2021-06-05 13:44:34,072 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 13:44:34,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:44:34,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:34,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:34,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:34,167 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 13:44:34,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687164551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:34,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:34,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 13:44:34,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60499138] [2021-06-05 13:44:34,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:34,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:34,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:34,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:34,168 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 13:44:34,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:34,563 INFO L93 Difference]: Finished difference Result 4708 states and 14414 transitions. [2021-06-05 13:44:34,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 13:44:34,563 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 13:44:34,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:34,569 INFO L225 Difference]: With dead ends: 4708 [2021-06-05 13:44:34,569 INFO L226 Difference]: Without dead ends: 4708 [2021-06-05 13:44:34,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 321.9ms TimeCoverageRelationStatistics Valid=756, Invalid=1500, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 13:44:34,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4708 states. [2021-06-05 13:44:34,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4708 to 4231. [2021-06-05 13:44:34,611 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 13:44:34,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4231 states to 4231 states and 13281 transitions. [2021-06-05 13:44:34,618 INFO L78 Accepts]: Start accepts. Automaton has 4231 states and 13281 transitions. Word has length 22 [2021-06-05 13:44:34,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:34,618 INFO L482 AbstractCegarLoop]: Abstraction has 4231 states and 13281 transitions. [2021-06-05 13:44:34,618 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 13:44:34,618 INFO L276 IsEmpty]: Start isEmpty. Operand 4231 states and 13281 transitions. [2021-06-05 13:44:34,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:34,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:34,622 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:34,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:34,823 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:34,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:34,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1785055823, now seen corresponding path program 229 times [2021-06-05 13:44:34,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:34,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345217266] [2021-06-05 13:44:34,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:34,886 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 13:44:34,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:34,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345217266] [2021-06-05 13:44:34,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345217266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:34,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333424813] [2021-06-05 13:44:34,886 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 13:44:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:34,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:34,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:34,984 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 13:44:34,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333424813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:34,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:34,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 13:44:34,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306942908] [2021-06-05 13:44:34,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:34,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:34,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:34,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:34,985 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 13:44:35,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:35,521 INFO L93 Difference]: Finished difference Result 4892 states and 14848 transitions. [2021-06-05 13:44:35,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 13:44:35,521 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 13:44:35,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:35,527 INFO L225 Difference]: With dead ends: 4892 [2021-06-05 13:44:35,527 INFO L226 Difference]: Without dead ends: 4892 [2021-06-05 13:44:35,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 425.2ms TimeCoverageRelationStatistics Valid=1057, Invalid=2023, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 13:44:35,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4892 states. [2021-06-05 13:44:35,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4892 to 4293. [2021-06-05 13:44:35,597 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 13:44:35,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 13481 transitions. [2021-06-05 13:44:35,604 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 13481 transitions. Word has length 22 [2021-06-05 13:44:35,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:35,604 INFO L482 AbstractCegarLoop]: Abstraction has 4293 states and 13481 transitions. [2021-06-05 13:44:35,604 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 13:44:35,604 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 13481 transitions. [2021-06-05 13:44:35,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:35,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:35,609 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:35,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-05 13:44:35,810 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:35,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:35,810 INFO L82 PathProgramCache]: Analyzing trace with hash -363740713, now seen corresponding path program 230 times [2021-06-05 13:44:35,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:35,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888826321] [2021-06-05 13:44:35,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:35,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:35,857 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 13:44:35,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:35,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888826321] [2021-06-05 13:44:35,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888826321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:35,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99920945] [2021-06-05 13:44:35,858 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 13:44:35,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:35,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:35,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:35,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:35,989 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 13:44:35,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99920945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:35,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:35,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 13:44:35,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659824511] [2021-06-05 13:44:35,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:35,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:35,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:35,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:35,990 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 13:44:36,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:36,516 INFO L93 Difference]: Finished difference Result 5068 states and 15287 transitions. [2021-06-05 13:44:36,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 13:44:36,516 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 13:44:36,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:36,522 INFO L225 Difference]: With dead ends: 5068 [2021-06-05 13:44:36,522 INFO L226 Difference]: Without dead ends: 5068 [2021-06-05 13:44:36,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 422.8ms TimeCoverageRelationStatistics Valid=1188, Invalid=2118, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 13:44:36,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5068 states. [2021-06-05 13:44:36,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5068 to 4271. [2021-06-05 13:44:36,569 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 13:44:36,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4271 states to 4271 states and 13440 transitions. [2021-06-05 13:44:36,576 INFO L78 Accepts]: Start accepts. Automaton has 4271 states and 13440 transitions. Word has length 22 [2021-06-05 13:44:36,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:36,576 INFO L482 AbstractCegarLoop]: Abstraction has 4271 states and 13440 transitions. [2021-06-05 13:44:36,576 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 13:44:36,576 INFO L276 IsEmpty]: Start isEmpty. Operand 4271 states and 13440 transitions. [2021-06-05 13:44:36,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:36,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:36,580 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:36,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 13:44:36,781 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:36,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:36,781 INFO L82 PathProgramCache]: Analyzing trace with hash 207714093, now seen corresponding path program 231 times [2021-06-05 13:44:36,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:36,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25493977] [2021-06-05 13:44:36,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:36,827 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 13:44:36,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:36,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25493977] [2021-06-05 13:44:36,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25493977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:36,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553035643] [2021-06-05 13:44:36,828 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 13:44:36,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:44:36,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:36,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:36,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:36,937 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 13:44:36,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553035643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:36,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:36,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 13:44:36,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176772987] [2021-06-05 13:44:36,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:36,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:36,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:36,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:36,938 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 13:44:37,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:37,566 INFO L93 Difference]: Finished difference Result 4740 states and 14442 transitions. [2021-06-05 13:44:37,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 13:44:37,566 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 13:44:37,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:37,571 INFO L225 Difference]: With dead ends: 4740 [2021-06-05 13:44:37,571 INFO L226 Difference]: Without dead ends: 4734 [2021-06-05 13:44:37,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 510.9ms TimeCoverageRelationStatistics Valid=1484, Invalid=2806, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 13:44:37,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4734 states. [2021-06-05 13:44:37,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4734 to 4087. [2021-06-05 13:44:37,612 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 13:44:37,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4087 states to 4087 states and 12820 transitions. [2021-06-05 13:44:37,618 INFO L78 Accepts]: Start accepts. Automaton has 4087 states and 12820 transitions. Word has length 22 [2021-06-05 13:44:37,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:37,618 INFO L482 AbstractCegarLoop]: Abstraction has 4087 states and 12820 transitions. [2021-06-05 13:44:37,618 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 13:44:37,618 INFO L276 IsEmpty]: Start isEmpty. Operand 4087 states and 12820 transitions. [2021-06-05 13:44:37,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:37,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:37,622 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:37,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-05 13:44:37,838 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:37,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:37,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1723857453, now seen corresponding path program 232 times [2021-06-05 13:44:37,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:37,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935597720] [2021-06-05 13:44:37,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:37,886 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 13:44:37,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:37,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935597720] [2021-06-05 13:44:37,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935597720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:37,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095653432] [2021-06-05 13:44:37,887 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 13:44:37,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:37,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:37,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:37,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:37,993 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 13:44:37,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095653432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:37,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:37,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 13:44:37,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411030445] [2021-06-05 13:44:37,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:37,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:37,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:37,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:37,994 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 13:44:38,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:38,496 INFO L93 Difference]: Finished difference Result 5641 states and 17112 transitions. [2021-06-05 13:44:38,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 13:44:38,496 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 13:44:38,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:38,502 INFO L225 Difference]: With dead ends: 5641 [2021-06-05 13:44:38,503 INFO L226 Difference]: Without dead ends: 5629 [2021-06-05 13:44:38,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 390.4ms TimeCoverageRelationStatistics Valid=837, Invalid=1713, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 13:44:38,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5629 states. [2021-06-05 13:44:38,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5629 to 4769. [2021-06-05 13:44:38,562 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 13:44:38,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4769 states to 4769 states and 15077 transitions. [2021-06-05 13:44:38,571 INFO L78 Accepts]: Start accepts. Automaton has 4769 states and 15077 transitions. Word has length 22 [2021-06-05 13:44:38,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:38,571 INFO L482 AbstractCegarLoop]: Abstraction has 4769 states and 15077 transitions. [2021-06-05 13:44:38,571 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 13:44:38,571 INFO L276 IsEmpty]: Start isEmpty. Operand 4769 states and 15077 transitions. [2021-06-05 13:44:38,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:38,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:38,576 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:38,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:38,776 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:38,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:38,776 INFO L82 PathProgramCache]: Analyzing trace with hash 2106518739, now seen corresponding path program 233 times [2021-06-05 13:44:38,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:38,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307175555] [2021-06-05 13:44:38,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:38,821 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 13:44:38,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:38,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307175555] [2021-06-05 13:44:38,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307175555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:38,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194493642] [2021-06-05 13:44:38,821 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 13:44:38,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:44:38,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:38,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:38,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:38,924 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 13:44:38,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194493642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:38,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:38,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 13:44:38,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306790892] [2021-06-05 13:44:38,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:38,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:38,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:38,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:38,925 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 13:44:39,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:39,445 INFO L93 Difference]: Finished difference Result 5550 states and 16864 transitions. [2021-06-05 13:44:39,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 13:44:39,445 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 13:44:39,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:39,452 INFO L225 Difference]: With dead ends: 5550 [2021-06-05 13:44:39,452 INFO L226 Difference]: Without dead ends: 5546 [2021-06-05 13:44:39,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 400.9ms TimeCoverageRelationStatistics Valid=851, Invalid=2571, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 13:44:39,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5546 states. [2021-06-05 13:44:39,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5546 to 4533. [2021-06-05 13:44:39,522 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 13:44:39,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4533 states to 4533 states and 14224 transitions. [2021-06-05 13:44:39,530 INFO L78 Accepts]: Start accepts. Automaton has 4533 states and 14224 transitions. Word has length 22 [2021-06-05 13:44:39,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:39,530 INFO L482 AbstractCegarLoop]: Abstraction has 4533 states and 14224 transitions. [2021-06-05 13:44:39,530 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 13:44:39,530 INFO L276 IsEmpty]: Start isEmpty. Operand 4533 states and 14224 transitions. [2021-06-05 13:44:39,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:39,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:39,535 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:39,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-05 13:44:39,735 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:39,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:39,736 INFO L82 PathProgramCache]: Analyzing trace with hash 2072919511, now seen corresponding path program 234 times [2021-06-05 13:44:39,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:39,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407627281] [2021-06-05 13:44:39,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:39,787 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 13:44:39,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:39,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407627281] [2021-06-05 13:44:39,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407627281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:39,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574817241] [2021-06-05 13:44:39,788 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 13:44:39,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:44:39,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:39,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:39,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:39,888 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 13:44:39,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574817241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:39,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:39,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 13:44:39,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792436844] [2021-06-05 13:44:39,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:39,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:39,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:39,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:39,889 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 13:44:40,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:40,359 INFO L93 Difference]: Finished difference Result 5471 states and 16546 transitions. [2021-06-05 13:44:40,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 13:44:40,359 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 13:44:40,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:40,364 INFO L225 Difference]: With dead ends: 5471 [2021-06-05 13:44:40,365 INFO L226 Difference]: Without dead ends: 5463 [2021-06-05 13:44:40,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 373.0ms TimeCoverageRelationStatistics Valid=728, Invalid=2352, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 13:44:40,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5463 states. [2021-06-05 13:44:40,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5463 to 4659. [2021-06-05 13:44:40,408 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 13:44:40,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 14620 transitions. [2021-06-05 13:44:40,415 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 14620 transitions. Word has length 22 [2021-06-05 13:44:40,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:40,415 INFO L482 AbstractCegarLoop]: Abstraction has 4659 states and 14620 transitions. [2021-06-05 13:44:40,415 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 13:44:40,415 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 14620 transitions. [2021-06-05 13:44:40,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:40,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:40,419 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:40,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:40,620 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:40,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:40,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1031343443, now seen corresponding path program 235 times [2021-06-05 13:44:40,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:40,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791671622] [2021-06-05 13:44:40,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:40,664 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 13:44:40,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:40,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791671622] [2021-06-05 13:44:40,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791671622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:40,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693150176] [2021-06-05 13:44:40,664 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 13:44:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:40,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:40,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:40,784 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 13:44:40,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693150176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:40,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:40,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 13:44:40,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548496589] [2021-06-05 13:44:40,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:40,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:40,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:40,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:40,784 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 13:44:41,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:41,205 INFO L93 Difference]: Finished difference Result 5651 states and 17165 transitions. [2021-06-05 13:44:41,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 13:44:41,205 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 13:44:41,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:41,211 INFO L225 Difference]: With dead ends: 5651 [2021-06-05 13:44:41,211 INFO L226 Difference]: Without dead ends: 5639 [2021-06-05 13:44:41,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 359.3ms TimeCoverageRelationStatistics Valid=630, Invalid=2126, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 13:44:41,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5639 states. [2021-06-05 13:44:41,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5639 to 4746. [2021-06-05 13:44:41,263 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 13:44:41,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4746 states to 4746 states and 14874 transitions. [2021-06-05 13:44:41,271 INFO L78 Accepts]: Start accepts. Automaton has 4746 states and 14874 transitions. Word has length 22 [2021-06-05 13:44:41,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:41,271 INFO L482 AbstractCegarLoop]: Abstraction has 4746 states and 14874 transitions. [2021-06-05 13:44:41,271 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 13:44:41,271 INFO L276 IsEmpty]: Start isEmpty. Operand 4746 states and 14874 transitions. [2021-06-05 13:44:41,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:41,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:41,276 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:41,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:41,477 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:41,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:41,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1192743593, now seen corresponding path program 236 times [2021-06-05 13:44:41,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:41,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20214299] [2021-06-05 13:44:41,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:41,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:41,523 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 13:44:41,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:41,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20214299] [2021-06-05 13:44:41,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20214299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:41,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915769041] [2021-06-05 13:44:41,523 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 13:44:41,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:41,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:41,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:41,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:41,627 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 13:44:41,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915769041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:41,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:41,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 13:44:41,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150449679] [2021-06-05 13:44:41,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:41,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:41,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:41,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:41,628 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 13:44:42,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:42,027 INFO L93 Difference]: Finished difference Result 5785 states and 17615 transitions. [2021-06-05 13:44:42,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 13:44:42,028 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 13:44:42,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:42,033 INFO L225 Difference]: With dead ends: 5785 [2021-06-05 13:44:42,033 INFO L226 Difference]: Without dead ends: 5769 [2021-06-05 13:44:42,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 341.6ms TimeCoverageRelationStatistics Valid=558, Invalid=1892, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 13:44:42,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5769 states. [2021-06-05 13:44:42,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5769 to 4762. [2021-06-05 13:44:42,081 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 13:44:42,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 14907 transitions. [2021-06-05 13:44:42,088 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 14907 transitions. Word has length 22 [2021-06-05 13:44:42,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:42,088 INFO L482 AbstractCegarLoop]: Abstraction has 4762 states and 14907 transitions. [2021-06-05 13:44:42,088 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 13:44:42,088 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 14907 transitions. [2021-06-05 13:44:42,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:42,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:42,092 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:42,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable417 [2021-06-05 13:44:42,301 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:42,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:42,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1419964973, now seen corresponding path program 237 times [2021-06-05 13:44:42,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:42,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643725133] [2021-06-05 13:44:42,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:42,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:42,347 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 13:44:42,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:42,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643725133] [2021-06-05 13:44:42,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643725133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:42,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123652129] [2021-06-05 13:44:42,348 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 13:44:42,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:44:42,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:42,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:42,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:42,452 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 13:44:42,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123652129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:42,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:42,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 13:44:42,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438187081] [2021-06-05 13:44:42,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:42,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:42,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:42,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:42,453 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 13:44:42,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:42,708 INFO L93 Difference]: Finished difference Result 5323 states and 16253 transitions. [2021-06-05 13:44:42,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 13:44:42,708 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 13:44:42,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:42,713 INFO L225 Difference]: With dead ends: 5323 [2021-06-05 13:44:42,713 INFO L226 Difference]: Without dead ends: 5313 [2021-06-05 13:44:42,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 263.7ms TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 13:44:42,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5313 states. [2021-06-05 13:44:42,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5313 to 4762. [2021-06-05 13:44:42,757 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 13:44:42,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 14902 transitions. [2021-06-05 13:44:42,765 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 14902 transitions. Word has length 22 [2021-06-05 13:44:42,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:42,765 INFO L482 AbstractCegarLoop]: Abstraction has 4762 states and 14902 transitions. [2021-06-05 13:44:42,765 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 13:44:42,765 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 14902 transitions. [2021-06-05 13:44:42,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:42,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:42,769 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:42,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:42,969 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:42,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:42,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1143175849, now seen corresponding path program 238 times [2021-06-05 13:44:42,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:42,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721937819] [2021-06-05 13:44:42,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:43,015 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 13:44:43,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:43,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721937819] [2021-06-05 13:44:43,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721937819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:43,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141414596] [2021-06-05 13:44:43,016 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 13:44:43,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:43,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:43,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:43,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:43,109 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 13:44:43,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141414596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:43,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:43,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-05 13:44:43,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828337060] [2021-06-05 13:44:43,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:44:43,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:43,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:44:43,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:44:43,110 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 13:44:43,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:43,234 INFO L93 Difference]: Finished difference Result 5170 states and 15985 transitions. [2021-06-05 13:44:43,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:44:43,234 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 13:44:43,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:43,239 INFO L225 Difference]: With dead ends: 5170 [2021-06-05 13:44:43,239 INFO L226 Difference]: Without dead ends: 5158 [2021-06-05 13:44:43,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 158.0ms TimeCoverageRelationStatistics Valid=213, Invalid=599, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:44:43,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5158 states. [2021-06-05 13:44:43,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5158 to 4762. [2021-06-05 13:44:43,285 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 13:44:43,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 14901 transitions. [2021-06-05 13:44:43,292 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 14901 transitions. Word has length 22 [2021-06-05 13:44:43,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:43,292 INFO L482 AbstractCegarLoop]: Abstraction has 4762 states and 14901 transitions. [2021-06-05 13:44:43,292 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 13:44:43,292 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 14901 transitions. [2021-06-05 13:44:43,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:43,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:43,297 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:43,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:43,497 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:43,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:43,498 INFO L82 PathProgramCache]: Analyzing trace with hash -2091230197, now seen corresponding path program 239 times [2021-06-05 13:44:43,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:43,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592086799] [2021-06-05 13:44:43,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:43,544 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 13:44:43,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:43,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592086799] [2021-06-05 13:44:43,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592086799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:43,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907011966] [2021-06-05 13:44:43,545 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 13:44:43,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:44:43,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:43,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:43,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:43,650 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 13:44:43,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907011966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:43,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:43,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 13:44:43,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651850930] [2021-06-05 13:44:43,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:44:43,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:43,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:44:43,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:44:43,651 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 13:44:44,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:44,044 INFO L93 Difference]: Finished difference Result 5204 states and 15992 transitions. [2021-06-05 13:44:44,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 13:44:44,044 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 13:44:44,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:44,050 INFO L225 Difference]: With dead ends: 5204 [2021-06-05 13:44:44,050 INFO L226 Difference]: Without dead ends: 5204 [2021-06-05 13:44:44,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 327.7ms TimeCoverageRelationStatistics Valid=785, Invalid=1665, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 13:44:44,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5204 states. [2021-06-05 13:44:44,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5204 to 4777. [2021-06-05 13:44:44,099 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 13:44:44,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4777 states to 4777 states and 14946 transitions. [2021-06-05 13:44:44,106 INFO L78 Accepts]: Start accepts. Automaton has 4777 states and 14946 transitions. Word has length 22 [2021-06-05 13:44:44,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:44,106 INFO L482 AbstractCegarLoop]: Abstraction has 4777 states and 14946 transitions. [2021-06-05 13:44:44,107 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 13:44:44,107 INFO L276 IsEmpty]: Start isEmpty. Operand 4777 states and 14946 transitions. [2021-06-05 13:44:44,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:44,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:44,111 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:44,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-05 13:44:44,312 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:44,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:44,312 INFO L82 PathProgramCache]: Analyzing trace with hash 447335179, now seen corresponding path program 240 times [2021-06-05 13:44:44,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:44,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15654271] [2021-06-05 13:44:44,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:44,352 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 13:44:44,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:44,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15654271] [2021-06-05 13:44:44,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15654271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:44,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916125896] [2021-06-05 13:44:44,352 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 13:44:44,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:44:44,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:44,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:44,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:44,478 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 13:44:44,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916125896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:44,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:44,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 13:44:44,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405375070] [2021-06-05 13:44:44,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:44,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:44,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:44,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:44,479 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 13:44:44,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:44,861 INFO L93 Difference]: Finished difference Result 5391 states and 16437 transitions. [2021-06-05 13:44:44,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 13:44:44,861 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 13:44:44,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:44,868 INFO L225 Difference]: With dead ends: 5391 [2021-06-05 13:44:44,868 INFO L226 Difference]: Without dead ends: 5381 [2021-06-05 13:44:44,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 304.4ms TimeCoverageRelationStatistics Valid=600, Invalid=1292, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 13:44:44,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5381 states. [2021-06-05 13:44:44,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5381 to 4798. [2021-06-05 13:44:44,921 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 13:44:44,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4798 states to 4798 states and 15007 transitions. [2021-06-05 13:44:44,929 INFO L78 Accepts]: Start accepts. Automaton has 4798 states and 15007 transitions. Word has length 22 [2021-06-05 13:44:44,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:44,929 INFO L482 AbstractCegarLoop]: Abstraction has 4798 states and 15007 transitions. [2021-06-05 13:44:44,929 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 13:44:44,929 INFO L276 IsEmpty]: Start isEmpty. Operand 4798 states and 15007 transitions. [2021-06-05 13:44:44,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:44,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:44,934 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:45,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-05 13:44:45,134 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:45,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:45,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1271890933, now seen corresponding path program 241 times [2021-06-05 13:44:45,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:45,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118285738] [2021-06-05 13:44:45,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:45,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:45,179 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 13:44:45,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:45,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118285738] [2021-06-05 13:44:45,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118285738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:45,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938257067] [2021-06-05 13:44:45,180 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 13:44:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:45,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:45,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:45,279 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 13:44:45,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938257067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:45,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:45,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 13:44:45,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027972052] [2021-06-05 13:44:45,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:45,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:45,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:45,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:45,280 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 13:44:45,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:45,647 INFO L93 Difference]: Finished difference Result 5359 states and 16352 transitions. [2021-06-05 13:44:45,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 13:44:45,648 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 13:44:45,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:45,653 INFO L225 Difference]: With dead ends: 5359 [2021-06-05 13:44:45,653 INFO L226 Difference]: Without dead ends: 5349 [2021-06-05 13:44:45,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 283.3ms TimeCoverageRelationStatistics Valid=608, Invalid=1284, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 13:44:45,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5349 states. [2021-06-05 13:44:45,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5349 to 4815. [2021-06-05 13:44:45,697 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 13:44:45,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4815 states to 4815 states and 15048 transitions. [2021-06-05 13:44:45,704 INFO L78 Accepts]: Start accepts. Automaton has 4815 states and 15048 transitions. Word has length 22 [2021-06-05 13:44:45,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:45,704 INFO L482 AbstractCegarLoop]: Abstraction has 4815 states and 15048 transitions. [2021-06-05 13:44:45,704 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 13:44:45,704 INFO L276 IsEmpty]: Start isEmpty. Operand 4815 states and 15048 transitions. [2021-06-05 13:44:45,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:45,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:45,709 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:45,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 13:44:45,910 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:45,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:45,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1720691467, now seen corresponding path program 242 times [2021-06-05 13:44:45,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:45,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609247341] [2021-06-05 13:44:45,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:45,992 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 13:44:45,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:45,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609247341] [2021-06-05 13:44:45,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609247341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:45,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561317154] [2021-06-05 13:44:45,992 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 13:44:46,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:46,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:46,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:46,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:46,092 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 13:44:46,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561317154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:46,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:46,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 13:44:46,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585689527] [2021-06-05 13:44:46,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:46,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:46,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:46,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:46,093 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 13:44:46,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:46,571 INFO L93 Difference]: Finished difference Result 5632 states and 17049 transitions. [2021-06-05 13:44:46,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 13:44:46,572 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 13:44:46,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:46,579 INFO L225 Difference]: With dead ends: 5632 [2021-06-05 13:44:46,579 INFO L226 Difference]: Without dead ends: 5628 [2021-06-05 13:44:46,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 419.8ms TimeCoverageRelationStatistics Valid=940, Invalid=1816, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 13:44:46,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5628 states. [2021-06-05 13:44:46,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5628 to 4825. [2021-06-05 13:44:46,634 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 13:44:46,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4825 states to 4825 states and 15069 transitions. [2021-06-05 13:44:46,642 INFO L78 Accepts]: Start accepts. Automaton has 4825 states and 15069 transitions. Word has length 22 [2021-06-05 13:44:46,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:46,642 INFO L482 AbstractCegarLoop]: Abstraction has 4825 states and 15069 transitions. [2021-06-05 13:44:46,642 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 13:44:46,642 INFO L276 IsEmpty]: Start isEmpty. Operand 4825 states and 15069 transitions. [2021-06-05 13:44:46,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:46,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:46,647 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:46,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:46,849 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:46,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:46,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1678679051, now seen corresponding path program 243 times [2021-06-05 13:44:46,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:46,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332924256] [2021-06-05 13:44:46,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:46,889 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 13:44:46,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:46,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332924256] [2021-06-05 13:44:46,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332924256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:46,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013062628] [2021-06-05 13:44:46,889 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 13:44:46,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:44:46,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:46,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:46,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:46,997 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 13:44:46,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013062628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:46,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:46,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 13:44:46,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461906483] [2021-06-05 13:44:46,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:46,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:46,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:46,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:46,998 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 13:44:47,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:47,512 INFO L93 Difference]: Finished difference Result 5908 states and 17767 transitions. [2021-06-05 13:44:47,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 13:44:47,512 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 13:44:47,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:47,517 INFO L225 Difference]: With dead ends: 5908 [2021-06-05 13:44:47,517 INFO L226 Difference]: Without dead ends: 5908 [2021-06-05 13:44:47,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 415.4ms TimeCoverageRelationStatistics Valid=1109, Invalid=1971, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 13:44:47,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5908 states. [2021-06-05 13:44:47,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5908 to 4874. [2021-06-05 13:44:47,575 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 13:44:47,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4874 states to 4874 states and 15267 transitions. [2021-06-05 13:44:47,583 INFO L78 Accepts]: Start accepts. Automaton has 4874 states and 15267 transitions. Word has length 22 [2021-06-05 13:44:47,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:47,583 INFO L482 AbstractCegarLoop]: Abstraction has 4874 states and 15267 transitions. [2021-06-05 13:44:47,583 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 13:44:47,583 INFO L276 IsEmpty]: Start isEmpty. Operand 4874 states and 15267 transitions. [2021-06-05 13:44:47,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:47,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:47,588 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:47,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-06-05 13:44:47,793 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:47,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:47,793 INFO L82 PathProgramCache]: Analyzing trace with hash -2044833439, now seen corresponding path program 244 times [2021-06-05 13:44:47,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:47,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386071059] [2021-06-05 13:44:47,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:47,833 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 13:44:47,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:47,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386071059] [2021-06-05 13:44:47,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386071059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:47,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633947376] [2021-06-05 13:44:47,833 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 13:44:47,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:47,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:47,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:47,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:47,937 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 13:44:47,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633947376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:47,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:47,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 13:44:47,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298050425] [2021-06-05 13:44:47,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:47,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:47,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:47,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:47,938 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 13:44:48,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:48,547 INFO L93 Difference]: Finished difference Result 5619 states and 16921 transitions. [2021-06-05 13:44:48,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 13:44:48,547 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 13:44:48,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:48,553 INFO L225 Difference]: With dead ends: 5619 [2021-06-05 13:44:48,553 INFO L226 Difference]: Without dead ends: 5607 [2021-06-05 13:44:48,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 504.3ms TimeCoverageRelationStatistics Valid=1461, Invalid=2961, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 13:44:48,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5607 states. [2021-06-05 13:44:48,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5607 to 4673. [2021-06-05 13:44:48,600 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 13:44:48,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4673 states to 4673 states and 14578 transitions. [2021-06-05 13:44:48,607 INFO L78 Accepts]: Start accepts. Automaton has 4673 states and 14578 transitions. Word has length 22 [2021-06-05 13:44:48,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:48,607 INFO L482 AbstractCegarLoop]: Abstraction has 4673 states and 14578 transitions. [2021-06-05 13:44:48,607 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 13:44:48,607 INFO L276 IsEmpty]: Start isEmpty. Operand 4673 states and 14578 transitions. [2021-06-05 13:44:48,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:48,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:48,611 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:48,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:48,811 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:48,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:48,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1509603637, now seen corresponding path program 245 times [2021-06-05 13:44:48,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:48,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739741677] [2021-06-05 13:44:48,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:48,863 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 13:44:48,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:48,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739741677] [2021-06-05 13:44:48,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739741677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:48,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48079191] [2021-06-05 13:44:48,864 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 13:44:48,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:44:48,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:48,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:48,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:49,001 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 13:44:49,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48079191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:49,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:49,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 13:44:49,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802675371] [2021-06-05 13:44:49,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:44:49,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:49,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:44:49,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:44:49,002 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 13:44:49,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:49,620 INFO L93 Difference]: Finished difference Result 5350 states and 16179 transitions. [2021-06-05 13:44:49,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 13:44:49,620 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 13:44:49,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:49,626 INFO L225 Difference]: With dead ends: 5350 [2021-06-05 13:44:49,626 INFO L226 Difference]: Without dead ends: 5338 [2021-06-05 13:44:49,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 546.3ms TimeCoverageRelationStatistics Valid=1464, Invalid=3092, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 13:44:49,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5338 states. [2021-06-05 13:44:49,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5338 to 4703. [2021-06-05 13:44:49,682 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 13:44:49,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 14674 transitions. [2021-06-05 13:44:49,690 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 14674 transitions. Word has length 22 [2021-06-05 13:44:49,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:49,690 INFO L482 AbstractCegarLoop]: Abstraction has 4703 states and 14674 transitions. [2021-06-05 13:44:49,690 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 13:44:49,690 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 14674 transitions. [2021-06-05 13:44:49,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:49,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:49,696 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:49,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-06-05 13:44:49,896 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:49,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:49,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1427351127, now seen corresponding path program 246 times [2021-06-05 13:44:49,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:49,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852692006] [2021-06-05 13:44:49,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:49,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:49,943 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 13:44:49,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:49,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852692006] [2021-06-05 13:44:49,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852692006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:49,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886093373] [2021-06-05 13:44:49,943 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 13:44:49,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:44:49,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:49,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:49,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:50,060 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 13:44:50,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886093373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:50,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:50,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 13:44:50,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043261162] [2021-06-05 13:44:50,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:44:50,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:50,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:44:50,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:44:50,061 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 13:44:50,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:50,516 INFO L93 Difference]: Finished difference Result 5100 states and 15587 transitions. [2021-06-05 13:44:50,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 13:44:50,516 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 13:44:50,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:50,536 INFO L225 Difference]: With dead ends: 5100 [2021-06-05 13:44:50,536 INFO L226 Difference]: Without dead ends: 5100 [2021-06-05 13:44:50,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 401.0ms TimeCoverageRelationStatistics Valid=907, Invalid=2063, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 13:44:50,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5100 states. [2021-06-05 13:44:50,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5100 to 4687. [2021-06-05 13:44:50,579 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 13:44:50,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 14625 transitions. [2021-06-05 13:44:50,586 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 14625 transitions. Word has length 22 [2021-06-05 13:44:50,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:50,586 INFO L482 AbstractCegarLoop]: Abstraction has 4687 states and 14625 transitions. [2021-06-05 13:44:50,586 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 13:44:50,586 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 14625 transitions. [2021-06-05 13:44:50,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:50,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:50,590 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:50,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable427 [2021-06-05 13:44:50,791 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:50,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:50,791 INFO L82 PathProgramCache]: Analyzing trace with hash 208442063, now seen corresponding path program 247 times [2021-06-05 13:44:50,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:50,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589031330] [2021-06-05 13:44:50,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:50,831 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 13:44:50,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:50,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589031330] [2021-06-05 13:44:50,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589031330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:50,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16692235] [2021-06-05 13:44:50,831 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 13:44:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:50,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:50,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:50,941 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 13:44:50,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16692235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:50,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:50,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 13:44:50,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479609665] [2021-06-05 13:44:50,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:44:50,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:50,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:44:50,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:44:50,942 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 13:44:51,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:51,348 INFO L93 Difference]: Finished difference Result 5184 states and 15752 transitions. [2021-06-05 13:44:51,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 13:44:51,348 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 13:44:51,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:51,354 INFO L225 Difference]: With dead ends: 5184 [2021-06-05 13:44:51,354 INFO L226 Difference]: Without dead ends: 5174 [2021-06-05 13:44:51,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 335.3ms TimeCoverageRelationStatistics Valid=713, Invalid=1639, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 13:44:51,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5174 states. [2021-06-05 13:44:51,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5174 to 4685. [2021-06-05 13:44:51,401 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 13:44:51,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4685 states to 4685 states and 14612 transitions. [2021-06-05 13:44:51,409 INFO L78 Accepts]: Start accepts. Automaton has 4685 states and 14612 transitions. Word has length 22 [2021-06-05 13:44:51,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:51,409 INFO L482 AbstractCegarLoop]: Abstraction has 4685 states and 14612 transitions. [2021-06-05 13:44:51,409 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 13:44:51,409 INFO L276 IsEmpty]: Start isEmpty. Operand 4685 states and 14612 transitions. [2021-06-05 13:44:51,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:51,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:51,414 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:51,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:51,615 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:51,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:51,615 INFO L82 PathProgramCache]: Analyzing trace with hash -662161577, now seen corresponding path program 248 times [2021-06-05 13:44:51,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:51,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062402975] [2021-06-05 13:44:51,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:51,652 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 13:44:51,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:51,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062402975] [2021-06-05 13:44:51,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062402975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:51,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799314723] [2021-06-05 13:44:51,652 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 13:44:51,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:51,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:51,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:51,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:51,759 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 13:44:51,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799314723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:51,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:51,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 13:44:51,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573265375] [2021-06-05 13:44:51,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:51,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:51,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:51,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:51,760 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 13:44:52,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:52,233 INFO L93 Difference]: Finished difference Result 5658 states and 17075 transitions. [2021-06-05 13:44:52,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 13:44:52,233 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 13:44:52,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:52,238 INFO L225 Difference]: With dead ends: 5658 [2021-06-05 13:44:52,239 INFO L226 Difference]: Without dead ends: 5652 [2021-06-05 13:44:52,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 353.2ms TimeCoverageRelationStatistics Valid=760, Invalid=1592, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 13:44:52,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5652 states. [2021-06-05 13:44:52,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5652 to 4809. [2021-06-05 13:44:52,302 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 13:44:52,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4809 states to 4809 states and 14989 transitions. [2021-06-05 13:44:52,310 INFO L78 Accepts]: Start accepts. Automaton has 4809 states and 14989 transitions. Word has length 22 [2021-06-05 13:44:52,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:52,310 INFO L482 AbstractCegarLoop]: Abstraction has 4809 states and 14989 transitions. [2021-06-05 13:44:52,310 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 13:44:52,310 INFO L276 IsEmpty]: Start isEmpty. Operand 4809 states and 14989 transitions. [2021-06-05 13:44:52,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:52,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:52,315 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:52,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable429 [2021-06-05 13:44:52,516 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:52,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:52,516 INFO L82 PathProgramCache]: Analyzing trace with hash -274603569, now seen corresponding path program 249 times [2021-06-05 13:44:52,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:52,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071807501] [2021-06-05 13:44:52,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:52,558 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 13:44:52,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:52,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071807501] [2021-06-05 13:44:52,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071807501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:52,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687406676] [2021-06-05 13:44:52,558 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 13:44:52,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:44:52,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:52,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:52,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:52,671 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 13:44:52,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687406676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:52,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:52,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 13:44:52,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393500177] [2021-06-05 13:44:52,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:52,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:52,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:52,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:52,672 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 13:44:53,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:53,118 INFO L93 Difference]: Finished difference Result 5753 states and 17358 transitions. [2021-06-05 13:44:53,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 13:44:53,118 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 13:44:53,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:53,125 INFO L225 Difference]: With dead ends: 5753 [2021-06-05 13:44:53,125 INFO L226 Difference]: Without dead ends: 5749 [2021-06-05 13:44:53,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 363.6ms TimeCoverageRelationStatistics Valid=805, Invalid=1547, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 13:44:53,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5749 states. [2021-06-05 13:44:53,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5749 to 4843. [2021-06-05 13:44:53,180 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 13:44:53,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4843 states to 4843 states and 15095 transitions. [2021-06-05 13:44:53,187 INFO L78 Accepts]: Start accepts. Automaton has 4843 states and 15095 transitions. Word has length 22 [2021-06-05 13:44:53,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:53,187 INFO L482 AbstractCegarLoop]: Abstraction has 4843 states and 15095 transitions. [2021-06-05 13:44:53,188 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 13:44:53,188 INFO L276 IsEmpty]: Start isEmpty. Operand 4843 states and 15095 transitions. [2021-06-05 13:44:53,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:53,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:53,193 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:53,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-06-05 13:44:53,393 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:53,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:53,393 INFO L82 PathProgramCache]: Analyzing trace with hash 569182295, now seen corresponding path program 250 times [2021-06-05 13:44:53,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:53,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883246875] [2021-06-05 13:44:53,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:53,428 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 13:44:53,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:53,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883246875] [2021-06-05 13:44:53,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883246875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:53,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655101326] [2021-06-05 13:44:53,428 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 13:44:53,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:53,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:53,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:53,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:53,534 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 13:44:53,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655101326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:53,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:53,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 13:44:53,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986148796] [2021-06-05 13:44:53,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:53,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:53,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:53,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:53,535 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 13:44:54,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:54,039 INFO L93 Difference]: Finished difference Result 6063 states and 18166 transitions. [2021-06-05 13:44:54,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 13:44:54,039 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 13:44:54,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:54,045 INFO L225 Difference]: With dead ends: 6063 [2021-06-05 13:44:54,045 INFO L226 Difference]: Without dead ends: 6063 [2021-06-05 13:44:54,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 391.4ms TimeCoverageRelationStatistics Valid=1038, Invalid=1824, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 13:44:54,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2021-06-05 13:44:54,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 4876. [2021-06-05 13:44:54,099 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 13:44:54,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4876 states to 4876 states and 15239 transitions. [2021-06-05 13:44:54,107 INFO L78 Accepts]: Start accepts. Automaton has 4876 states and 15239 transitions. Word has length 22 [2021-06-05 13:44:54,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:54,107 INFO L482 AbstractCegarLoop]: Abstraction has 4876 states and 15239 transitions. [2021-06-05 13:44:54,107 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 13:44:54,107 INFO L276 IsEmpty]: Start isEmpty. Operand 4876 states and 15239 transitions. [2021-06-05 13:44:54,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:54,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:54,112 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:54,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:54,313 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:54,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:54,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1140637101, now seen corresponding path program 251 times [2021-06-05 13:44:54,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:54,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998958689] [2021-06-05 13:44:54,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:54,347 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 13:44:54,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:54,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998958689] [2021-06-05 13:44:54,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998958689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:54,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941165123] [2021-06-05 13:44:54,348 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 13:44:54,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:44:54,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:54,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:54,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:54,456 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 13:44:54,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941165123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:54,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:54,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 13:44:54,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241913704] [2021-06-05 13:44:54,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:44:54,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:54,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:44:54,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:44:54,457 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 13:44:55,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:55,064 INFO L93 Difference]: Finished difference Result 5817 states and 17445 transitions. [2021-06-05 13:44:55,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 13:44:55,065 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 13:44:55,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:55,070 INFO L225 Difference]: With dead ends: 5817 [2021-06-05 13:44:55,070 INFO L226 Difference]: Without dead ends: 5808 [2021-06-05 13:44:55,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 518.1ms TimeCoverageRelationStatistics Valid=1537, Invalid=3293, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 13:44:55,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2021-06-05 13:44:55,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 4799. [2021-06-05 13:44:55,120 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 13:44:55,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4799 states to 4799 states and 14966 transitions. [2021-06-05 13:44:55,127 INFO L78 Accepts]: Start accepts. Automaton has 4799 states and 14966 transitions. Word has length 22 [2021-06-05 13:44:55,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:55,127 INFO L482 AbstractCegarLoop]: Abstraction has 4799 states and 14966 transitions. [2021-06-05 13:44:55,127 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 13:44:55,127 INFO L276 IsEmpty]: Start isEmpty. Operand 4799 states and 14966 transitions. [2021-06-05 13:44:55,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:55,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:55,132 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:55,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 13:44:55,341 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:55,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:55,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1675866903, now seen corresponding path program 252 times [2021-06-05 13:44:55,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:55,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383748547] [2021-06-05 13:44:55,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:55,377 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 13:44:55,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:55,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383748547] [2021-06-05 13:44:55,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383748547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:55,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311652835] [2021-06-05 13:44:55,377 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 13:44:55,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:44:55,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:55,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:55,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:55,506 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 13:44:55,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311652835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:55,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:55,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 13:44:55,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083457353] [2021-06-05 13:44:55,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:44:55,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:55,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:44:55,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:44:55,507 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 13:44:56,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:56,105 INFO L93 Difference]: Finished difference Result 5773 states and 17293 transitions. [2021-06-05 13:44:56,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 13:44:56,105 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 13:44:56,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:56,110 INFO L225 Difference]: With dead ends: 5773 [2021-06-05 13:44:56,110 INFO L226 Difference]: Without dead ends: 5755 [2021-06-05 13:44:56,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 518.2ms TimeCoverageRelationStatistics Valid=1436, Invalid=3256, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 13:44:56,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5755 states. [2021-06-05 13:44:56,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5755 to 4708. [2021-06-05 13:44:56,156 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 13:44:56,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4708 states to 4708 states and 14681 transitions. [2021-06-05 13:44:56,163 INFO L78 Accepts]: Start accepts. Automaton has 4708 states and 14681 transitions. Word has length 22 [2021-06-05 13:44:56,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:56,163 INFO L482 AbstractCegarLoop]: Abstraction has 4708 states and 14681 transitions. [2021-06-05 13:44:56,163 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 13:44:56,163 INFO L276 IsEmpty]: Start isEmpty. Operand 4708 states and 14681 transitions. [2021-06-05 13:44:56,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:56,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:56,167 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:56,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 13:44:56,368 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:56,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:56,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1088121581, now seen corresponding path program 253 times [2021-06-05 13:44:56,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:56,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986259982] [2021-06-05 13:44:56,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:56,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:56,414 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 13:44:56,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:56,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986259982] [2021-06-05 13:44:56,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986259982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:56,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354544987] [2021-06-05 13:44:56,415 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 13:44:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:56,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:56,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:56,533 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 13:44:56,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354544987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:56,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:56,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 13:44:56,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443134893] [2021-06-05 13:44:56,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:44:56,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:56,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:44:56,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:44:56,534 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 13:44:57,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:57,059 INFO L93 Difference]: Finished difference Result 5582 states and 16822 transitions. [2021-06-05 13:44:57,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 13:44:57,060 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 13:44:57,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:57,066 INFO L225 Difference]: With dead ends: 5582 [2021-06-05 13:44:57,066 INFO L226 Difference]: Without dead ends: 5564 [2021-06-05 13:44:57,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 474.8ms TimeCoverageRelationStatistics Valid=1406, Invalid=3286, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 13:44:57,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5564 states. [2021-06-05 13:44:57,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5564 to 4728. [2021-06-05 13:44:57,121 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 13:44:57,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4728 states to 4728 states and 14747 transitions. [2021-06-05 13:44:57,128 INFO L78 Accepts]: Start accepts. Automaton has 4728 states and 14747 transitions. Word has length 22 [2021-06-05 13:44:57,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:57,128 INFO L482 AbstractCegarLoop]: Abstraction has 4728 states and 14747 transitions. [2021-06-05 13:44:57,128 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 13:44:57,128 INFO L276 IsEmpty]: Start isEmpty. Operand 4728 states and 14747 transitions. [2021-06-05 13:44:57,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:57,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:57,132 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:57,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-05 13:44:57,337 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:57,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:57,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1165777525, now seen corresponding path program 254 times [2021-06-05 13:44:57,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:57,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713675148] [2021-06-05 13:44:57,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:57,389 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 13:44:57,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:57,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713675148] [2021-06-05 13:44:57,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713675148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:57,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779087644] [2021-06-05 13:44:57,390 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 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 13:44:57,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:57,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:57,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:57,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:57,514 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 13:44:57,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779087644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:57,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:57,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 13:44:57,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558923507] [2021-06-05 13:44:57,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:44:57,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:57,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:44:57,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:44:57,515 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 13:44:58,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:58,031 INFO L93 Difference]: Finished difference Result 5063 states and 15470 transitions. [2021-06-05 13:44:58,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 13:44:58,032 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 13:44:58,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:58,037 INFO L225 Difference]: With dead ends: 5063 [2021-06-05 13:44:58,038 INFO L226 Difference]: Without dead ends: 5063 [2021-06-05 13:44:58,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 452.7ms TimeCoverageRelationStatistics Valid=1006, Invalid=2416, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 13:44:58,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5063 states. [2021-06-05 13:44:58,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5063 to 4692. [2021-06-05 13:44:58,084 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 13:44:58,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4692 states to 4692 states and 14628 transitions. [2021-06-05 13:44:58,092 INFO L78 Accepts]: Start accepts. Automaton has 4692 states and 14628 transitions. Word has length 22 [2021-06-05 13:44:58,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:58,092 INFO L482 AbstractCegarLoop]: Abstraction has 4692 states and 14628 transitions. [2021-06-05 13:44:58,092 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 13:44:58,092 INFO L276 IsEmpty]: Start isEmpty. Operand 4692 states and 14628 transitions. [2021-06-05 13:44:58,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:58,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:58,097 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:58,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-06-05 13:44:58,312 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:58,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:58,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1392690059, now seen corresponding path program 255 times [2021-06-05 13:44:58,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:58,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941283921] [2021-06-05 13:44:58,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:58,353 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 13:44:58,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:58,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941283921] [2021-06-05 13:44:58,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941283921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:58,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596039983] [2021-06-05 13:44:58,354 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 13:44:58,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:44:58,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:58,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:58,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:58,494 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 13:44:58,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596039983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:58,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:58,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 13:44:58,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560333647] [2021-06-05 13:44:58,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:44:58,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:58,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:44:58,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:44:58,495 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 13:44:58,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:58,955 INFO L93 Difference]: Finished difference Result 5220 states and 15784 transitions. [2021-06-05 13:44:58,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 13:44:58,955 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 13:44:58,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:58,961 INFO L225 Difference]: With dead ends: 5220 [2021-06-05 13:44:58,961 INFO L226 Difference]: Without dead ends: 5210 [2021-06-05 13:44:58,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 405.2ms TimeCoverageRelationStatistics Valid=809, Invalid=1947, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 13:44:58,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5210 states. [2021-06-05 13:44:59,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5210 to 4589. [2021-06-05 13:44:59,003 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 13:44:59,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4589 states to 4589 states and 14315 transitions. [2021-06-05 13:44:59,009 INFO L78 Accepts]: Start accepts. Automaton has 4589 states and 14315 transitions. Word has length 22 [2021-06-05 13:44:59,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:59,009 INFO L482 AbstractCegarLoop]: Abstraction has 4589 states and 14315 transitions. [2021-06-05 13:44:59,010 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 13:44:59,010 INFO L276 IsEmpty]: Start isEmpty. Operand 4589 states and 14315 transitions. [2021-06-05 13:44:59,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:59,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:59,014 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:59,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 13:44:59,214 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:59,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:59,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1059579275, now seen corresponding path program 256 times [2021-06-05 13:44:59,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:59,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915515314] [2021-06-05 13:44:59,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:59,258 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 13:44:59,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:59,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915515314] [2021-06-05 13:44:59,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915515314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:59,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682156983] [2021-06-05 13:44:59,259 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 13:44:59,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:59,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:59,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:44:59,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:59,385 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 13:44:59,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682156983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:59,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:59,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 13:44:59,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874770292] [2021-06-05 13:44:59,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:44:59,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:59,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:44:59,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:44:59,386 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 13:44:59,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:59,844 INFO L93 Difference]: Finished difference Result 5724 states and 17179 transitions. [2021-06-05 13:44:59,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 13:44:59,845 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 13:44:59,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:59,851 INFO L225 Difference]: With dead ends: 5724 [2021-06-05 13:44:59,851 INFO L226 Difference]: Without dead ends: 5718 [2021-06-05 13:44:59,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 362.7ms TimeCoverageRelationStatistics Valid=801, Invalid=1749, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 13:44:59,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5718 states. [2021-06-05 13:44:59,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5718 to 4609. [2021-06-05 13:44:59,905 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 13:44:59,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4609 states to 4609 states and 14372 transitions. [2021-06-05 13:44:59,913 INFO L78 Accepts]: Start accepts. Automaton has 4609 states and 14372 transitions. Word has length 22 [2021-06-05 13:44:59,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:59,913 INFO L482 AbstractCegarLoop]: Abstraction has 4609 states and 14372 transitions. [2021-06-05 13:44:59,913 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 13:44:59,913 INFO L276 IsEmpty]: Start isEmpty. Operand 4609 states and 14372 transitions. [2021-06-05 13:44:59,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:44:59,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:59,918 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:00,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:00,119 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:00,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:00,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1999207541, now seen corresponding path program 257 times [2021-06-05 13:45:00,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:00,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980523561] [2021-06-05 13:45:00,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:00,157 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 13:45:00,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:00,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980523561] [2021-06-05 13:45:00,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980523561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:00,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247243510] [2021-06-05 13:45:00,157 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 13:45:00,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:45:00,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:00,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:45:00,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:00,282 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 13:45:00,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247243510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:00,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:00,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 13:45:00,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072487046] [2021-06-05 13:45:00,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:00,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:00,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:00,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:00,283 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 13:45:00,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:00,716 INFO L93 Difference]: Finished difference Result 6302 states and 18942 transitions. [2021-06-05 13:45:00,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 13:45:00,717 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 13:45:00,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:00,723 INFO L225 Difference]: With dead ends: 6302 [2021-06-05 13:45:00,723 INFO L226 Difference]: Without dead ends: 6300 [2021-06-05 13:45:00,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 373.1ms TimeCoverageRelationStatistics Valid=834, Invalid=1616, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 13:45:00,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6300 states. [2021-06-05 13:45:00,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6300 to 4905. [2021-06-05 13:45:00,778 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 13:45:00,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 15289 transitions. [2021-06-05 13:45:00,786 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 15289 transitions. Word has length 22 [2021-06-05 13:45:00,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:00,786 INFO L482 AbstractCegarLoop]: Abstraction has 4905 states and 15289 transitions. [2021-06-05 13:45:00,786 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 13:45:00,786 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 15289 transitions. [2021-06-05 13:45:00,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:45:00,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:00,792 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:01,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:01,005 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:01,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:01,005 INFO L82 PathProgramCache]: Analyzing trace with hash 534521227, now seen corresponding path program 258 times [2021-06-05 13:45:01,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:01,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127851921] [2021-06-05 13:45:01,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:01,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:01,035 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 13:45:01,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:01,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127851921] [2021-06-05 13:45:01,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127851921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:01,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102446660] [2021-06-05 13:45:01,036 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 13:45:01,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:45:01,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:01,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:45:01,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:01,146 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 13:45:01,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102446660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:01,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:01,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 13:45:01,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977283997] [2021-06-05 13:45:01,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:01,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:01,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:01,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:01,147 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 13:45:01,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:01,618 INFO L93 Difference]: Finished difference Result 6307 states and 18845 transitions. [2021-06-05 13:45:01,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 13:45:01,618 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 13:45:01,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:01,624 INFO L225 Difference]: With dead ends: 6307 [2021-06-05 13:45:01,624 INFO L226 Difference]: Without dead ends: 6307 [2021-06-05 13:45:01,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 376.3ms TimeCoverageRelationStatistics Valid=966, Invalid=1686, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 13:45:01,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6307 states. [2021-06-05 13:45:01,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6307 to 5098. [2021-06-05 13:45:01,678 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 13:45:01,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5098 states to 5098 states and 15939 transitions. [2021-06-05 13:45:01,685 INFO L78 Accepts]: Start accepts. Automaton has 5098 states and 15939 transitions. Word has length 22 [2021-06-05 13:45:01,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:01,685 INFO L482 AbstractCegarLoop]: Abstraction has 5098 states and 15939 transitions. [2021-06-05 13:45:01,685 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 13:45:01,685 INFO L276 IsEmpty]: Start isEmpty. Operand 5098 states and 15939 transitions. [2021-06-05 13:45:01,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:45:01,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:01,690 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:01,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:01,890 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:01,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:01,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1105976033, now seen corresponding path program 259 times [2021-06-05 13:45:01,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:01,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154164390] [2021-06-05 13:45:01,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:01,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:01,926 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 13:45:01,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:01,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154164390] [2021-06-05 13:45:01,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154164390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:01,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202795567] [2021-06-05 13:45:01,927 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 13:45:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:01,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:45:01,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:02,033 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 13:45:02,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202795567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:02,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:02,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 13:45:02,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808997802] [2021-06-05 13:45:02,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:02,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:02,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:02,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:02,034 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 13:45:02,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:02,753 INFO L93 Difference]: Finished difference Result 6203 states and 18588 transitions. [2021-06-05 13:45:02,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 13:45:02,753 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 13:45:02,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:02,760 INFO L225 Difference]: With dead ends: 6203 [2021-06-05 13:45:02,760 INFO L226 Difference]: Without dead ends: 6194 [2021-06-05 13:45:02,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 598.9ms TimeCoverageRelationStatistics Valid=1706, Invalid=3844, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 13:45:02,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6194 states. [2021-06-05 13:45:02,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6194 to 5023. [2021-06-05 13:45:02,813 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 13:45:02,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5023 states to 5023 states and 15683 transitions. [2021-06-05 13:45:02,821 INFO L78 Accepts]: Start accepts. Automaton has 5023 states and 15683 transitions. Word has length 22 [2021-06-05 13:45:02,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:02,821 INFO L482 AbstractCegarLoop]: Abstraction has 5023 states and 15683 transitions. [2021-06-05 13:45:02,821 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 13:45:02,821 INFO L276 IsEmpty]: Start isEmpty. Operand 5023 states and 15683 transitions. [2021-06-05 13:45:02,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:45:02,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:02,826 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:03,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:03,026 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:03,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:03,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1641205835, now seen corresponding path program 260 times [2021-06-05 13:45:03,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:03,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191807730] [2021-06-05 13:45:03,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:03,063 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 13:45:03,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:03,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191807730] [2021-06-05 13:45:03,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191807730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:03,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867820860] [2021-06-05 13:45:03,063 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 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 13:45:03,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:03,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:03,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:45:03,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:03,201 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 13:45:03,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867820860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:03,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:03,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 13:45:03,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323359803] [2021-06-05 13:45:03,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:03,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:03,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:03,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:03,201 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 13:45:03,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:03,888 INFO L93 Difference]: Finished difference Result 6188 states and 18528 transitions. [2021-06-05 13:45:03,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 13:45:03,888 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 13:45:03,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:03,895 INFO L225 Difference]: With dead ends: 6188 [2021-06-05 13:45:03,895 INFO L226 Difference]: Without dead ends: 6176 [2021-06-05 13:45:03,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 613.3ms TimeCoverageRelationStatistics Valid=1503, Invalid=3609, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 13:45:03,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6176 states. [2021-06-05 13:45:03,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6176 to 5007. [2021-06-05 13:45:03,960 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 13:45:03,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5007 states to 5007 states and 15629 transitions. [2021-06-05 13:45:03,969 INFO L78 Accepts]: Start accepts. Automaton has 5007 states and 15629 transitions. Word has length 22 [2021-06-05 13:45:03,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:03,969 INFO L482 AbstractCegarLoop]: Abstraction has 5007 states and 15629 transitions. [2021-06-05 13:45:03,969 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 13:45:03,969 INFO L276 IsEmpty]: Start isEmpty. Operand 5007 states and 15629 transitions. [2021-06-05 13:45:03,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:45:03,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:03,975 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:04,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-05 13:45:04,175 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:04,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:04,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1053460513, now seen corresponding path program 261 times [2021-06-05 13:45:04,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:04,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96922607] [2021-06-05 13:45:04,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:04,217 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 13:45:04,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:04,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96922607] [2021-06-05 13:45:04,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96922607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:04,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201372831] [2021-06-05 13:45:04,217 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 13:45:04,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:45:04,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:04,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:45:04,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:04,337 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 13:45:04,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201372831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:04,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:04,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 13:45:04,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324428937] [2021-06-05 13:45:04,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:45:04,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:04,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:45:04,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:04,337 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 13:45:04,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:04,943 INFO L93 Difference]: Finished difference Result 6237 states and 18671 transitions. [2021-06-05 13:45:04,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 13:45:04,944 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 13:45:04,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:04,952 INFO L225 Difference]: With dead ends: 6237 [2021-06-05 13:45:04,952 INFO L226 Difference]: Without dead ends: 6219 [2021-06-05 13:45:04,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 530.7ms TimeCoverageRelationStatistics Valid=1373, Invalid=3457, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 13:45:04,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6219 states. [2021-06-05 13:45:05,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6219 to 5025. [2021-06-05 13:45:05,020 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 13:45:05,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5025 states to 5025 states and 15695 transitions. [2021-06-05 13:45:05,027 INFO L78 Accepts]: Start accepts. Automaton has 5025 states and 15695 transitions. Word has length 22 [2021-06-05 13:45:05,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:05,027 INFO L482 AbstractCegarLoop]: Abstraction has 5025 states and 15695 transitions. [2021-06-05 13:45:05,027 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 13:45:05,027 INFO L276 IsEmpty]: Start isEmpty. Operand 5025 states and 15695 transitions. [2021-06-05 13:45:05,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:45:05,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:05,032 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:05,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 13:45:05,233 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:05,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:05,233 INFO L82 PathProgramCache]: Analyzing trace with hash 13224715, now seen corresponding path program 262 times [2021-06-05 13:45:05,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:05,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804669362] [2021-06-05 13:45:05,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:05,285 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 13:45:05,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:05,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804669362] [2021-06-05 13:45:05,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804669362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:05,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607384812] [2021-06-05 13:45:05,285 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 13:45:05,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:05,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:05,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:45:05,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:05,439 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 13:45:05,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607384812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:05,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:05,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 13:45:05,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181965062] [2021-06-05 13:45:05,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:45:05,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:05,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:45:05,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:45:05,440 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 13:45:05,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:05,992 INFO L93 Difference]: Finished difference Result 6089 states and 18341 transitions. [2021-06-05 13:45:05,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 13:45:05,992 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 13:45:05,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:05,999 INFO L225 Difference]: With dead ends: 6089 [2021-06-05 13:45:05,999 INFO L226 Difference]: Without dead ends: 6065 [2021-06-05 13:45:06,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 519.7ms TimeCoverageRelationStatistics Valid=1314, Invalid=3378, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 13:45:06,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6065 states. [2021-06-05 13:45:06,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6065 to 5048. [2021-06-05 13:45:06,062 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 13:45:06,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5048 states to 5048 states and 15775 transitions. [2021-06-05 13:45:06,070 INFO L78 Accepts]: Start accepts. Automaton has 5048 states and 15775 transitions. Word has length 22 [2021-06-05 13:45:06,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:06,070 INFO L482 AbstractCegarLoop]: Abstraction has 5048 states and 15775 transitions. [2021-06-05 13:45:06,070 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 13:45:06,071 INFO L276 IsEmpty]: Start isEmpty. Operand 5048 states and 15775 transitions. [2021-06-05 13:45:06,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:45:06,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:06,076 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:06,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-05 13:45:06,277 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:06,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:06,277 INFO L82 PathProgramCache]: Analyzing trace with hash 51612887, now seen corresponding path program 263 times [2021-06-05 13:45:06,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:06,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729579942] [2021-06-05 13:45:06,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:06,330 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 13:45:06,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:06,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729579942] [2021-06-05 13:45:06,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729579942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:06,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89470313] [2021-06-05 13:45:06,330 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 13:45:06,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:45:06,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:06,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:45:06,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:06,480 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 13:45:06,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89470313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:06,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:06,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 13:45:06,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734053403] [2021-06-05 13:45:06,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:45:06,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:06,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:45:06,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:06,481 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 13:45:07,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:07,053 INFO L93 Difference]: Finished difference Result 5685 states and 17310 transitions. [2021-06-05 13:45:07,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 13:45:07,053 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 13:45:07,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:07,059 INFO L225 Difference]: With dead ends: 5685 [2021-06-05 13:45:07,059 INFO L226 Difference]: Without dead ends: 5685 [2021-06-05 13:45:07,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 513.6ms TimeCoverageRelationStatistics Valid=1082, Invalid=2700, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 13:45:07,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5685 states. [2021-06-05 13:45:07,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5685 to 5099. [2021-06-05 13:45:07,115 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 13:45:07,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5099 states to 5099 states and 15904 transitions. [2021-06-05 13:45:07,124 INFO L78 Accepts]: Start accepts. Automaton has 5099 states and 15904 transitions. Word has length 22 [2021-06-05 13:45:07,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:07,124 INFO L482 AbstractCegarLoop]: Abstraction has 5099 states and 15904 transitions. [2021-06-05 13:45:07,124 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 13:45:07,124 INFO L276 IsEmpty]: Start isEmpty. Operand 5099 states and 15904 transitions. [2021-06-05 13:45:07,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:45:07,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:07,130 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:07,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 13:45:07,337 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:07,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:07,338 INFO L82 PathProgramCache]: Analyzing trace with hash -550327729, now seen corresponding path program 264 times [2021-06-05 13:45:07,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:07,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227598864] [2021-06-05 13:45:07,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:07,388 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 13:45:07,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:07,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227598864] [2021-06-05 13:45:07,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227598864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:07,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326083045] [2021-06-05 13:45:07,388 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 13:45:07,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:45:07,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:07,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:45:07,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:07,563 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 13:45:07,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326083045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:07,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:07,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 13:45:07,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566844380] [2021-06-05 13:45:07,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:45:07,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:07,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:45:07,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:45:07,564 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 13:45:08,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:08,285 INFO L93 Difference]: Finished difference Result 6196 states and 18689 transitions. [2021-06-05 13:45:08,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 13:45:08,285 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 13:45:08,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:08,293 INFO L225 Difference]: With dead ends: 6196 [2021-06-05 13:45:08,293 INFO L226 Difference]: Without dead ends: 6196 [2021-06-05 13:45:08,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 573.6ms TimeCoverageRelationStatistics Valid=846, Invalid=2124, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 13:45:08,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6196 states. [2021-06-05 13:45:08,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6196 to 5243. [2021-06-05 13:45:08,359 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 13:45:08,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5243 states to 5243 states and 16352 transitions. [2021-06-05 13:45:08,369 INFO L78 Accepts]: Start accepts. Automaton has 5243 states and 16352 transitions. Word has length 22 [2021-06-05 13:45:08,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:08,369 INFO L482 AbstractCegarLoop]: Abstraction has 5243 states and 16352 transitions. [2021-06-05 13:45:08,369 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 13:45:08,369 INFO L276 IsEmpty]: Start isEmpty. Operand 5243 states and 16352 transitions. [2021-06-05 13:45:08,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:45:08,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:08,375 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:08,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-06-05 13:45:08,576 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:08,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:08,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1401029161, now seen corresponding path program 265 times [2021-06-05 13:45:08,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:08,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292824979] [2021-06-05 13:45:08,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:08,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:08,614 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 13:45:08,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:08,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292824979] [2021-06-05 13:45:08,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292824979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:08,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185203527] [2021-06-05 13:45:08,614 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 13:45:08,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:08,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:45:08,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:08,764 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 13:45:08,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185203527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:08,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:08,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-05 13:45:08,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167330177] [2021-06-05 13:45:08,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:45:08,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:08,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:45:08,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:08,765 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 13:45:09,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:09,337 INFO L93 Difference]: Finished difference Result 6611 states and 19949 transitions. [2021-06-05 13:45:09,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 13:45:09,337 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 13:45:09,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:09,345 INFO L225 Difference]: With dead ends: 6611 [2021-06-05 13:45:09,345 INFO L226 Difference]: Without dead ends: 6611 [2021-06-05 13:45:09,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 491.6ms TimeCoverageRelationStatistics Valid=827, Invalid=1929, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 13:45:09,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6611 states. [2021-06-05 13:45:09,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6611 to 5413. [2021-06-05 13:45:09,417 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 13:45:09,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5413 states to 5413 states and 16899 transitions. [2021-06-05 13:45:09,427 INFO L78 Accepts]: Start accepts. Automaton has 5413 states and 16899 transitions. Word has length 22 [2021-06-05 13:45:09,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:09,427 INFO L482 AbstractCegarLoop]: Abstraction has 5413 states and 16899 transitions. [2021-06-05 13:45:09,427 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 13:45:09,428 INFO L276 IsEmpty]: Start isEmpty. Operand 5413 states and 16899 transitions. [2021-06-05 13:45:09,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:45:09,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:09,434 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:09,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-06-05 13:45:09,650 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:09,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:09,650 INFO L82 PathProgramCache]: Analyzing trace with hash 372644175, now seen corresponding path program 266 times [2021-06-05 13:45:09,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:09,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809810612] [2021-06-05 13:45:09,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:09,681 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 13:45:09,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:09,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809810612] [2021-06-05 13:45:09,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809810612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:09,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014139195] [2021-06-05 13:45:09,681 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 13:45:09,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:09,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:09,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:45:09,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:09,821 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 13:45:09,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014139195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:09,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:09,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 13:45:09,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720788135] [2021-06-05 13:45:09,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:09,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:09,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:09,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:09,822 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 13:45:10,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:10,361 INFO L93 Difference]: Finished difference Result 7182 states and 21641 transitions. [2021-06-05 13:45:10,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 13:45:10,362 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 13:45:10,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:10,370 INFO L225 Difference]: With dead ends: 7182 [2021-06-05 13:45:10,370 INFO L226 Difference]: Without dead ends: 7182 [2021-06-05 13:45:10,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 448.2ms TimeCoverageRelationStatistics Valid=864, Invalid=1788, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 13:45:10,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7182 states. [2021-06-05 13:45:10,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7182 to 5709. [2021-06-05 13:45:10,441 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 13:45:10,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5709 states to 5709 states and 17857 transitions. [2021-06-05 13:45:10,451 INFO L78 Accepts]: Start accepts. Automaton has 5709 states and 17857 transitions. Word has length 22 [2021-06-05 13:45:10,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:10,451 INFO L482 AbstractCegarLoop]: Abstraction has 5709 states and 17857 transitions. [2021-06-05 13:45:10,451 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 13:45:10,452 INFO L276 IsEmpty]: Start isEmpty. Operand 5709 states and 17857 transitions. [2021-06-05 13:45:10,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:45:10,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:10,457 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:10,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:10,661 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:10,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:10,661 INFO L82 PathProgramCache]: Analyzing trace with hash -539971881, now seen corresponding path program 267 times [2021-06-05 13:45:10,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:10,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200872111] [2021-06-05 13:45:10,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:10,691 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 13:45:10,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:10,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200872111] [2021-06-05 13:45:10,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200872111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:10,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842464068] [2021-06-05 13:45:10,692 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 13:45:10,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:45:10,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:10,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:45:10,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:10,812 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 13:45:10,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842464068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:10,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:10,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-06-05 13:45:10,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274938911] [2021-06-05 13:45:10,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:10,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:10,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:10,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:10,813 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 13:45:11,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:11,323 INFO L93 Difference]: Finished difference Result 8455 states and 25540 transitions. [2021-06-05 13:45:11,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 13:45:11,326 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 13:45:11,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:11,335 INFO L225 Difference]: With dead ends: 8455 [2021-06-05 13:45:11,335 INFO L226 Difference]: Without dead ends: 8455 [2021-06-05 13:45:11,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 416.5ms TimeCoverageRelationStatistics Valid=950, Invalid=1702, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 13:45:11,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8455 states. [2021-06-05 13:45:11,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8455 to 6970. [2021-06-05 13:45:11,429 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 13:45:11,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6970 states to 6970 states and 21934 transitions. [2021-06-05 13:45:11,441 INFO L78 Accepts]: Start accepts. Automaton has 6970 states and 21934 transitions. Word has length 22 [2021-06-05 13:45:11,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:11,441 INFO L482 AbstractCegarLoop]: Abstraction has 6970 states and 21934 transitions. [2021-06-05 13:45:11,442 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 13:45:11,442 INFO L276 IsEmpty]: Start isEmpty. Operand 6970 states and 21934 transitions. [2021-06-05 13:45:11,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:45:11,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:11,449 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:11,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-06-05 13:45:11,650 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:11,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:11,650 INFO L82 PathProgramCache]: Analyzing trace with hash 31482925, now seen corresponding path program 268 times [2021-06-05 13:45:11,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:11,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819859594] [2021-06-05 13:45:11,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:11,679 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 13:45:11,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:11,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819859594] [2021-06-05 13:45:11,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819859594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:11,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368190525] [2021-06-05 13:45:11,679 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 13:45:11,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:11,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:11,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:45:11,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:11,796 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 13:45:11,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368190525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:11,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:11,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-06-05 13:45:11,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779362108] [2021-06-05 13:45:11,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:45:11,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:11,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:45:11,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:11,797 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 13:45:12,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:12,641 INFO L93 Difference]: Finished difference Result 8123 states and 24573 transitions. [2021-06-05 13:45:12,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 13:45:12,641 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 13:45:12,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:12,651 INFO L225 Difference]: With dead ends: 8123 [2021-06-05 13:45:12,651 INFO L226 Difference]: Without dead ends: 8117 [2021-06-05 13:45:12,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2442 ImplicationChecksByTransitivity, 703.1ms TimeCoverageRelationStatistics Valid=1939, Invalid=4703, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 13:45:12,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-06-05 13:45:12,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 6930. [2021-06-05 13:45:12,755 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 13:45:12,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6930 states to 6930 states and 21785 transitions. [2021-06-05 13:45:12,773 INFO L78 Accepts]: Start accepts. Automaton has 6930 states and 21785 transitions. Word has length 22 [2021-06-05 13:45:12,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:12,773 INFO L482 AbstractCegarLoop]: Abstraction has 6930 states and 21785 transitions. [2021-06-05 13:45:12,774 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 13:45:12,774 INFO L276 IsEmpty]: Start isEmpty. Operand 6930 states and 21785 transitions. [2021-06-05 13:45:12,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:45:12,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:12,782 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:12,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:12,989 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:12,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:12,989 INFO L82 PathProgramCache]: Analyzing trace with hash 566712727, now seen corresponding path program 269 times [2021-06-05 13:45:12,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:12,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369423517] [2021-06-05 13:45:12,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:13,025 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 13:45:13,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:13,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369423517] [2021-06-05 13:45:13,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369423517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:13,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653237870] [2021-06-05 13:45:13,026 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 13:45:13,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:45:13,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:13,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:45:13,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:13,157 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 13:45:13,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653237870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:13,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:13,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 13:45:13,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632707073] [2021-06-05 13:45:13,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:13,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:13,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:13,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:13,158 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 13:45:13,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:13,974 INFO L93 Difference]: Finished difference Result 8123 states and 24622 transitions. [2021-06-05 13:45:13,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 13:45:13,974 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 13:45:13,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:13,985 INFO L225 Difference]: With dead ends: 8123 [2021-06-05 13:45:13,986 INFO L226 Difference]: Without dead ends: 8111 [2021-06-05 13:45:13,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 679.8ms TimeCoverageRelationStatistics Valid=1649, Invalid=4203, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 13:45:13,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8111 states. [2021-06-05 13:45:14,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8111 to 6927. [2021-06-05 13:45:14,090 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 13:45:14,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6927 states to 6927 states and 21785 transitions. [2021-06-05 13:45:14,104 INFO L78 Accepts]: Start accepts. Automaton has 6927 states and 21785 transitions. Word has length 22 [2021-06-05 13:45:14,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:14,104 INFO L482 AbstractCegarLoop]: Abstraction has 6927 states and 21785 transitions. [2021-06-05 13:45:14,104 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 13:45:14,104 INFO L276 IsEmpty]: Start isEmpty. Operand 6927 states and 21785 transitions. [2021-06-05 13:45:14,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:45:14,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:14,113 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:14,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:14,325 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:14,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:14,325 INFO L82 PathProgramCache]: Analyzing trace with hash -21032595, now seen corresponding path program 270 times [2021-06-05 13:45:14,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:14,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837016656] [2021-06-05 13:45:14,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:14,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:14,362 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 13:45:14,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:14,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837016656] [2021-06-05 13:45:14,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837016656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:14,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275809684] [2021-06-05 13:45:14,362 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 13:45:14,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:45:14,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:14,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:45:14,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:14,487 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 13:45:14,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275809684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:14,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:14,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-05 13:45:14,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812750756] [2021-06-05 13:45:14,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:45:14,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:14,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:45:14,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:14,488 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 13:45:15,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:15,210 INFO L93 Difference]: Finished difference Result 8230 states and 24962 transitions. [2021-06-05 13:45:15,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 13:45:15,210 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 13:45:15,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:15,220 INFO L225 Difference]: With dead ends: 8230 [2021-06-05 13:45:15,220 INFO L226 Difference]: Without dead ends: 8212 [2021-06-05 13:45:15,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 637.0ms TimeCoverageRelationStatistics Valid=1425, Invalid=3831, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 13:45:15,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8212 states. [2021-06-05 13:45:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8212 to 7085. [2021-06-05 13:45:15,314 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 13:45:15,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7085 states to 7085 states and 22307 transitions. [2021-06-05 13:45:15,327 INFO L78 Accepts]: Start accepts. Automaton has 7085 states and 22307 transitions. Word has length 22 [2021-06-05 13:45:15,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:15,327 INFO L482 AbstractCegarLoop]: Abstraction has 7085 states and 22307 transitions. [2021-06-05 13:45:15,327 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 13:45:15,327 INFO L276 IsEmpty]: Start isEmpty. Operand 7085 states and 22307 transitions. [2021-06-05 13:45:15,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:45:15,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:15,336 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:15,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:15,536 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:15,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:15,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1061268393, now seen corresponding path program 271 times [2021-06-05 13:45:15,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:15,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791699177] [2021-06-05 13:45:15,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:15,580 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 13:45:15,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:15,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791699177] [2021-06-05 13:45:15,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791699177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:15,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77504795] [2021-06-05 13:45:15,580 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 13:45:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:15,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:45:15,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:15,749 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 13:45:15,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77504795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:15,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:15,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 13:45:15,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744603307] [2021-06-05 13:45:15,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:45:15,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:15,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:45:15,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:45:15,750 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 13:45:16,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:16,434 INFO L93 Difference]: Finished difference Result 8473 states and 25731 transitions. [2021-06-05 13:45:16,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 13:45:16,435 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 13:45:16,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:16,445 INFO L225 Difference]: With dead ends: 8473 [2021-06-05 13:45:16,445 INFO L226 Difference]: Without dead ends: 8449 [2021-06-05 13:45:16,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 597.2ms TimeCoverageRelationStatistics Valid=1272, Invalid=3558, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 13:45:16,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8449 states. [2021-06-05 13:45:16,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8449 to 7305. [2021-06-05 13:45:16,555 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 13:45:16,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7305 states to 7305 states and 23022 transitions. [2021-06-05 13:45:16,569 INFO L78 Accepts]: Start accepts. Automaton has 7305 states and 23022 transitions. Word has length 22 [2021-06-05 13:45:16,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:16,569 INFO L482 AbstractCegarLoop]: Abstraction has 7305 states and 23022 transitions. [2021-06-05 13:45:16,569 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 13:45:16,569 INFO L276 IsEmpty]: Start isEmpty. Operand 7305 states and 23022 transitions. [2021-06-05 13:45:16,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:45:16,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:16,577 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:16,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-06-05 13:45:16,778 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:16,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:16,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1051160237, now seen corresponding path program 272 times [2021-06-05 13:45:16,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:16,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548820244] [2021-06-05 13:45:16,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:16,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:16,843 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 13:45:16,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:16,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548820244] [2021-06-05 13:45:16,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548820244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:16,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474573655] [2021-06-05 13:45:16,843 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 13:45:16,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:16,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:16,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:45:16,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:16,997 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 13:45:16,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474573655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:16,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:16,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 13:45:16,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27724770] [2021-06-05 13:45:16,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:45:16,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:16,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:45:16,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:16,997 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 13:45:17,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:17,540 INFO L93 Difference]: Finished difference Result 8382 states and 25614 transitions. [2021-06-05 13:45:17,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 13:45:17,540 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 13:45:17,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:17,552 INFO L225 Difference]: With dead ends: 8382 [2021-06-05 13:45:17,553 INFO L226 Difference]: Without dead ends: 8352 [2021-06-05 13:45:17,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 521.9ms TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 13:45:17,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2021-06-05 13:45:17,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 7353. [2021-06-05 13:45:17,650 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 13:45:17,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7353 states to 7353 states and 23166 transitions. [2021-06-05 13:45:17,664 INFO L78 Accepts]: Start accepts. Automaton has 7353 states and 23166 transitions. Word has length 22 [2021-06-05 13:45:17,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:17,664 INFO L482 AbstractCegarLoop]: Abstraction has 7353 states and 23166 transitions. [2021-06-05 13:45:17,664 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 13:45:17,664 INFO L276 IsEmpty]: Start isEmpty. Operand 7353 states and 23166 transitions. [2021-06-05 13:45:17,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:17,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:17,673 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:17,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-05 13:45:17,873 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:17,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:17,874 INFO L82 PathProgramCache]: Analyzing trace with hash -943740933, now seen corresponding path program 273 times [2021-06-05 13:45:17,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:17,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67470909] [2021-06-05 13:45:17,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:18,014 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 13:45:18,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:18,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67470909] [2021-06-05 13:45:18,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67470909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:18,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651035412] [2021-06-05 13:45:18,015 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 13:45:18,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:45:18,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:18,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:18,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:18,159 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 13:45:18,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651035412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:18,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:18,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 13:45:18,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411275984] [2021-06-05 13:45:18,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:18,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:18,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:18,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:18,160 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 13:45:18,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:18,588 INFO L93 Difference]: Finished difference Result 7724 states and 23857 transitions. [2021-06-05 13:45:18,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:45:18,588 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 13:45:18,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:18,599 INFO L225 Difference]: With dead ends: 7724 [2021-06-05 13:45:18,599 INFO L226 Difference]: Without dead ends: 7695 [2021-06-05 13:45:18,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 327.6ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:45:18,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7695 states. [2021-06-05 13:45:18,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7695 to 7410. [2021-06-05 13:45:18,692 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 13:45:18,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 23265 transitions. [2021-06-05 13:45:18,706 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 23265 transitions. Word has length 23 [2021-06-05 13:45:18,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:18,707 INFO L482 AbstractCegarLoop]: Abstraction has 7410 states and 23265 transitions. [2021-06-05 13:45:18,707 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 13:45:18,707 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 23265 transitions. [2021-06-05 13:45:18,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:18,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:18,716 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:18,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-06-05 13:45:18,916 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:18,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:18,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1733943489, now seen corresponding path program 274 times [2021-06-05 13:45:18,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:18,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019913412] [2021-06-05 13:45:18,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:19,054 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 13:45:19,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:19,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019913412] [2021-06-05 13:45:19,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019913412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:19,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163862775] [2021-06-05 13:45:19,054 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 13:45:19,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:19,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:19,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:19,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:19,194 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 13:45:19,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163862775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:19,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:19,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 13:45:19,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039639035] [2021-06-05 13:45:19,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:19,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:19,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:19,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:19,195 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 13:45:19,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:19,445 INFO L93 Difference]: Finished difference Result 7815 states and 24110 transitions. [2021-06-05 13:45:19,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:45:19,445 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 13:45:19,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:19,456 INFO L225 Difference]: With dead ends: 7815 [2021-06-05 13:45:19,456 INFO L226 Difference]: Without dead ends: 7808 [2021-06-05 13:45:19,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 241.5ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:19,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7808 states. [2021-06-05 13:45:19,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7808 to 7508. [2021-06-05 13:45:19,547 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 13:45:19,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7508 states to 7508 states and 23605 transitions. [2021-06-05 13:45:19,559 INFO L78 Accepts]: Start accepts. Automaton has 7508 states and 23605 transitions. Word has length 23 [2021-06-05 13:45:19,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:19,559 INFO L482 AbstractCegarLoop]: Abstraction has 7508 states and 23605 transitions. [2021-06-05 13:45:19,559 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 13:45:19,560 INFO L276 IsEmpty]: Start isEmpty. Operand 7508 states and 23605 transitions. [2021-06-05 13:45:19,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:19,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:19,567 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:19,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-06-05 13:45:19,767 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:19,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:19,768 INFO L82 PathProgramCache]: Analyzing trace with hash -119240765, now seen corresponding path program 275 times [2021-06-05 13:45:19,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:19,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539132815] [2021-06-05 13:45:19,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:19,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:19,934 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 13:45:19,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:19,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539132815] [2021-06-05 13:45:19,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539132815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:19,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957801731] [2021-06-05 13:45:19,934 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 13:45:19,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:45:19,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:19,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:19,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:20,095 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 13:45:20,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957801731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:20,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:20,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 13:45:20,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449095050] [2021-06-05 13:45:20,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:45:20,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:20,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:45:20,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:20,096 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 13:45:20,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:20,387 INFO L93 Difference]: Finished difference Result 7801 states and 24090 transitions. [2021-06-05 13:45:20,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:20,387 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 13:45:20,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:20,397 INFO L225 Difference]: With dead ends: 7801 [2021-06-05 13:45:20,397 INFO L226 Difference]: Without dead ends: 7785 [2021-06-05 13:45:20,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 317.9ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:20,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7785 states. [2021-06-05 13:45:20,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7785 to 7430. [2021-06-05 13:45:20,487 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 13:45:20,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-06-05 13:45:20,500 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-06-05 13:45:20,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:20,500 INFO L482 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-06-05 13:45:20,500 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 13:45:20,500 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-06-05 13:45:20,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:20,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:20,508 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:20,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:20,710 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:20,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:20,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1162488683, now seen corresponding path program 276 times [2021-06-05 13:45:20,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:20,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480767252] [2021-06-05 13:45:20,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:20,839 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 13:45:20,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:20,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480767252] [2021-06-05 13:45:20,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480767252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:20,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129223197] [2021-06-05 13:45:20,839 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 13:45:20,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:45:20,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:20,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:20,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:21,000 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 13:45:21,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129223197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:21,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:21,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 13:45:21,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654004924] [2021-06-05 13:45:21,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:21,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:21,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:21,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:21,000 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 13:45:21,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:21,279 INFO L93 Difference]: Finished difference Result 7734 states and 23848 transitions. [2021-06-05 13:45:21,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:21,279 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 13:45:21,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:21,289 INFO L225 Difference]: With dead ends: 7734 [2021-06-05 13:45:21,289 INFO L226 Difference]: Without dead ends: 7727 [2021-06-05 13:45:21,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 266.9ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:45:21,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7727 states. [2021-06-05 13:45:21,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7727 to 7430. [2021-06-05 13:45:21,368 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 13:45:21,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-06-05 13:45:21,419 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-06-05 13:45:21,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:21,419 INFO L482 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-06-05 13:45:21,419 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 13:45:21,419 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-06-05 13:45:21,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:21,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:21,427 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:21,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:21,627 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:21,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:21,628 INFO L82 PathProgramCache]: Analyzing trace with hash -627258881, now seen corresponding path program 277 times [2021-06-05 13:45:21,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:21,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985371778] [2021-06-05 13:45:21,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:21,781 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 13:45:21,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:21,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985371778] [2021-06-05 13:45:21,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985371778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:21,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172310818] [2021-06-05 13:45:21,781 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 13:45:21,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:21,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:21,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:21,947 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 13:45:21,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172310818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:21,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:21,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 13:45:21,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510464135] [2021-06-05 13:45:21,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:21,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:21,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:21,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:21,948 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 13:45:22,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:22,307 INFO L93 Difference]: Finished difference Result 7751 states and 23873 transitions. [2021-06-05 13:45:22,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:45:22,307 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 13:45:22,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:22,317 INFO L225 Difference]: With dead ends: 7751 [2021-06-05 13:45:22,317 INFO L226 Difference]: Without dead ends: 7744 [2021-06-05 13:45:22,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 296.6ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:22,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7744 states. [2021-06-05 13:45:22,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7744 to 7430. [2021-06-05 13:45:22,408 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 13:45:22,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-06-05 13:45:22,421 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-06-05 13:45:22,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:22,421 INFO L482 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-06-05 13:45:22,421 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 13:45:22,421 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-06-05 13:45:22,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:22,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:22,431 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:22,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-05 13:45:22,637 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:22,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:22,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1215004203, now seen corresponding path program 278 times [2021-06-05 13:45:22,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:22,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823713961] [2021-06-05 13:45:22,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:22,769 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 13:45:22,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:22,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823713961] [2021-06-05 13:45:22,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823713961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:22,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495359181] [2021-06-05 13:45:22,769 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 13:45:22,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:22,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:22,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:22,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:22,921 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 13:45:22,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495359181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:22,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:22,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 13:45:22,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917966472] [2021-06-05 13:45:22,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:22,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:22,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:22,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:22,922 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 13:45:23,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:23,243 INFO L93 Difference]: Finished difference Result 7771 states and 23903 transitions. [2021-06-05 13:45:23,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:45:23,243 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 13:45:23,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:23,252 INFO L225 Difference]: With dead ends: 7771 [2021-06-05 13:45:23,252 INFO L226 Difference]: Without dead ends: 7764 [2021-06-05 13:45:23,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 292.4ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:45:23,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7764 states. [2021-06-05 13:45:23,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7764 to 7430. [2021-06-05 13:45:23,338 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 13:45:23,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-06-05 13:45:23,351 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-06-05 13:45:23,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:23,351 INFO L482 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-06-05 13:45:23,351 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 13:45:23,351 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-06-05 13:45:23,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:23,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:23,359 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:23,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:23,560 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:23,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:23,560 INFO L82 PathProgramCache]: Analyzing trace with hash 2039727295, now seen corresponding path program 279 times [2021-06-05 13:45:23,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:23,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083176755] [2021-06-05 13:45:23,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:23,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:23,732 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 13:45:23,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:23,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083176755] [2021-06-05 13:45:23,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083176755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:23,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702650685] [2021-06-05 13:45:23,733 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 13:45:23,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:45:23,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:23,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:23,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:23,876 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 13:45:23,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702650685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:23,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:23,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 13:45:23,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730801022] [2021-06-05 13:45:23,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:23,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:23,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:23,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:23,876 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 13:45:24,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:24,267 INFO L93 Difference]: Finished difference Result 7671 states and 23732 transitions. [2021-06-05 13:45:24,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:45:24,267 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 13:45:24,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:24,278 INFO L225 Difference]: With dead ends: 7671 [2021-06-05 13:45:24,278 INFO L226 Difference]: Without dead ends: 7664 [2021-06-05 13:45:24,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 344.1ms TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:45:24,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7664 states. [2021-06-05 13:45:24,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7664 to 7430. [2021-06-05 13:45:24,364 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 13:45:24,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-06-05 13:45:24,377 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-06-05 13:45:24,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:24,377 INFO L482 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-06-05 13:45:24,378 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 13:45:24,378 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-06-05 13:45:24,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:24,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:24,386 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:24,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:24,588 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:24,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:24,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1090073861, now seen corresponding path program 280 times [2021-06-05 13:45:24,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:24,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57995549] [2021-06-05 13:45:24,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:24,734 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 13:45:24,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:24,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57995549] [2021-06-05 13:45:24,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57995549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:24,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19283933] [2021-06-05 13:45:24,735 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 13:45:24,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:24,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:24,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:24,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:24,917 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 13:45:24,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19283933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:24,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:24,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-05 13:45:24,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132989053] [2021-06-05 13:45:24,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:24,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:24,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:24,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:24,917 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 13:45:25,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:25,123 INFO L93 Difference]: Finished difference Result 7746 states and 24061 transitions. [2021-06-05 13:45:25,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:45:25,123 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 13:45:25,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:25,134 INFO L225 Difference]: With dead ends: 7746 [2021-06-05 13:45:25,134 INFO L226 Difference]: Without dead ends: 7739 [2021-06-05 13:45:25,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 277.5ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:45:25,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7739 states. [2021-06-05 13:45:25,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7739 to 7502. [2021-06-05 13:45:25,237 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 13:45:25,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 23601 transitions. [2021-06-05 13:45:25,252 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 23601 transitions. Word has length 23 [2021-06-05 13:45:25,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:25,252 INFO L482 AbstractCegarLoop]: Abstraction has 7502 states and 23601 transitions. [2021-06-05 13:45:25,252 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 13:45:25,252 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 23601 transitions. [2021-06-05 13:45:25,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:25,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:25,262 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:25,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-06-05 13:45:25,476 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:25,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:25,477 INFO L82 PathProgramCache]: Analyzing trace with hash 524628863, now seen corresponding path program 281 times [2021-06-05 13:45:25,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:25,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290901858] [2021-06-05 13:45:25,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:25,618 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 13:45:25,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:25,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290901858] [2021-06-05 13:45:25,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290901858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:25,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077829535] [2021-06-05 13:45:25,618 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 13:45:25,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:45:25,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:25,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:25,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:25,878 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 13:45:25,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077829535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:25,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:25,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 13:45:25,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089870837] [2021-06-05 13:45:25,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:45:25,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:25,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:45:25,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:25,879 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 13:45:26,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:26,129 INFO L93 Difference]: Finished difference Result 7747 states and 24058 transitions. [2021-06-05 13:45:26,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:45:26,130 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 13:45:26,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:26,140 INFO L225 Difference]: With dead ends: 7747 [2021-06-05 13:45:26,140 INFO L226 Difference]: Without dead ends: 7738 [2021-06-05 13:45:26,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 357.0ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:45:26,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7738 states. [2021-06-05 13:45:26,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7738 to 7502. [2021-06-05 13:45:26,229 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 13:45:26,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 23596 transitions. [2021-06-05 13:45:26,243 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 23596 transitions. Word has length 23 [2021-06-05 13:45:26,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:26,243 INFO L482 AbstractCegarLoop]: Abstraction has 7502 states and 23596 transitions. [2021-06-05 13:45:26,243 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 13:45:26,243 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 23596 transitions. [2021-06-05 13:45:26,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:26,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:26,252 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:26,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 13:45:26,453 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:26,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:26,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1554664965, now seen corresponding path program 282 times [2021-06-05 13:45:26,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:26,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261528880] [2021-06-05 13:45:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:26,636 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 13:45:26,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:26,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261528880] [2021-06-05 13:45:26,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261528880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:26,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664605927] [2021-06-05 13:45:26,637 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 13:45:26,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:45:26,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:26,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:26,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:26,841 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 13:45:26,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664605927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:26,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:26,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-05 13:45:26,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202602162] [2021-06-05 13:45:26,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:26,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:26,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:26,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:26,842 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 13:45:27,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:27,080 INFO L93 Difference]: Finished difference Result 7686 states and 23919 transitions. [2021-06-05 13:45:27,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:45:27,080 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 13:45:27,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:27,091 INFO L225 Difference]: With dead ends: 7686 [2021-06-05 13:45:27,091 INFO L226 Difference]: Without dead ends: 7679 [2021-06-05 13:45:27,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 297.4ms TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:27,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7679 states. [2021-06-05 13:45:27,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7679 to 7502. [2021-06-05 13:45:27,181 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 13:45:27,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 23596 transitions. [2021-06-05 13:45:27,195 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 23596 transitions. Word has length 23 [2021-06-05 13:45:27,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:27,195 INFO L482 AbstractCegarLoop]: Abstraction has 7502 states and 23596 transitions. [2021-06-05 13:45:27,195 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 13:45:27,195 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 23596 transitions. [2021-06-05 13:45:27,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:27,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:27,204 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:27,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:27,417 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:27,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:27,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1690015423, now seen corresponding path program 283 times [2021-06-05 13:45:27,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:27,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667852350] [2021-06-05 13:45:27,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:27,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:27,553 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 13:45:27,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:27,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667852350] [2021-06-05 13:45:27,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667852350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:27,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117458408] [2021-06-05 13:45:27,553 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 13:45:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:27,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:27,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:27,752 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 13:45:27,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117458408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:27,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:27,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-05 13:45:27,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348060361] [2021-06-05 13:45:27,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:45:27,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:27,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:45:27,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:27,753 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 13:45:28,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:28,049 INFO L93 Difference]: Finished difference Result 8082 states and 25035 transitions. [2021-06-05 13:45:28,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:45:28,049 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 13:45:28,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:28,059 INFO L225 Difference]: With dead ends: 8082 [2021-06-05 13:45:28,059 INFO L226 Difference]: Without dead ends: 8065 [2021-06-05 13:45:28,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 322.4ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:28,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8065 states. [2021-06-05 13:45:28,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8065 to 7691. [2021-06-05 13:45:28,151 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 13:45:28,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7691 states to 7691 states and 24252 transitions. [2021-06-05 13:45:28,165 INFO L78 Accepts]: Start accepts. Automaton has 7691 states and 24252 transitions. Word has length 23 [2021-06-05 13:45:28,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:28,165 INFO L482 AbstractCegarLoop]: Abstraction has 7691 states and 24252 transitions. [2021-06-05 13:45:28,165 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 13:45:28,165 INFO L276 IsEmpty]: Start isEmpty. Operand 7691 states and 24252 transitions. [2021-06-05 13:45:28,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:28,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:28,174 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:28,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:28,374 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:28,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:28,374 INFO L82 PathProgramCache]: Analyzing trace with hash -990249149, now seen corresponding path program 284 times [2021-06-05 13:45:28,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:28,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191530900] [2021-06-05 13:45:28,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:28,508 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 13:45:28,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:28,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191530900] [2021-06-05 13:45:28,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191530900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:28,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366068128] [2021-06-05 13:45:28,509 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 13:45:28,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:28,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:28,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:28,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:28,680 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 13:45:28,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366068128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:28,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:28,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 13:45:28,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243477953] [2021-06-05 13:45:28,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:28,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:28,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:28,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:28,681 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 13:45:28,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:28,974 INFO L93 Difference]: Finished difference Result 8086 states and 25005 transitions. [2021-06-05 13:45:28,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:45:28,974 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 13:45:28,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:28,984 INFO L225 Difference]: With dead ends: 8086 [2021-06-05 13:45:28,985 INFO L226 Difference]: Without dead ends: 8068 [2021-06-05 13:45:28,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 293.6ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:45:28,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8068 states. [2021-06-05 13:45:29,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8068 to 7641. [2021-06-05 13:45:29,077 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 13:45:29,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7641 states to 7641 states and 24052 transitions. [2021-06-05 13:45:29,091 INFO L78 Accepts]: Start accepts. Automaton has 7641 states and 24052 transitions. Word has length 23 [2021-06-05 13:45:29,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:29,091 INFO L482 AbstractCegarLoop]: Abstraction has 7641 states and 24052 transitions. [2021-06-05 13:45:29,091 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 13:45:29,091 INFO L276 IsEmpty]: Start isEmpty. Operand 7641 states and 24052 transitions. [2021-06-05 13:45:29,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:29,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:29,099 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:29,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-06-05 13:45:29,300 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:29,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:29,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1225424319, now seen corresponding path program 285 times [2021-06-05 13:45:29,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:29,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879220484] [2021-06-05 13:45:29,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:29,422 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 13:45:29,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:29,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879220484] [2021-06-05 13:45:29,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879220484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:29,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497001074] [2021-06-05 13:45:29,423 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 13:45:29,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:45:29,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:29,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:29,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:29,602 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 13:45:29,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497001074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:29,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:29,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 13:45:29,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707445787] [2021-06-05 13:45:29,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:29,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:29,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:29,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:29,602 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 13:45:29,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:29,914 INFO L93 Difference]: Finished difference Result 7976 states and 24675 transitions. [2021-06-05 13:45:29,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:45:29,914 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 13:45:29,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:29,925 INFO L225 Difference]: With dead ends: 7976 [2021-06-05 13:45:29,925 INFO L226 Difference]: Without dead ends: 7954 [2021-06-05 13:45:29,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 306.4ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:29,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7954 states. [2021-06-05 13:45:30,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7954 to 7625. [2021-06-05 13:45:30,037 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 13:45:30,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7625 states to 7625 states and 23997 transitions. [2021-06-05 13:45:30,051 INFO L78 Accepts]: Start accepts. Automaton has 7625 states and 23997 transitions. Word has length 23 [2021-06-05 13:45:30,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:30,051 INFO L482 AbstractCegarLoop]: Abstraction has 7625 states and 23997 transitions. [2021-06-05 13:45:30,051 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 13:45:30,051 INFO L276 IsEmpty]: Start isEmpty. Operand 7625 states and 23997 transitions. [2021-06-05 13:45:30,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:30,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:30,059 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:30,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:30,259 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:30,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:30,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1191825091, now seen corresponding path program 286 times [2021-06-05 13:45:30,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:30,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271390569] [2021-06-05 13:45:30,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:30,384 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 13:45:30,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:30,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271390569] [2021-06-05 13:45:30,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271390569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:30,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221502555] [2021-06-05 13:45:30,384 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) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:30,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:30,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:30,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:30,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:30,551 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 13:45:30,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221502555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:30,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:30,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 13:45:30,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116988602] [2021-06-05 13:45:30,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:30,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:30,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:30,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:30,552 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 13:45:30,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:30,813 INFO L93 Difference]: Finished difference Result 7875 states and 24443 transitions. [2021-06-05 13:45:30,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:45:30,814 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 13:45:30,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:30,823 INFO L225 Difference]: With dead ends: 7875 [2021-06-05 13:45:30,824 INFO L226 Difference]: Without dead ends: 7868 [2021-06-05 13:45:30,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 275.5ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:45:30,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7868 states. [2021-06-05 13:45:30,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7868 to 7625. [2021-06-05 13:45:30,915 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 13:45:30,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7625 states to 7625 states and 23997 transitions. [2021-06-05 13:45:30,928 INFO L78 Accepts]: Start accepts. Automaton has 7625 states and 23997 transitions. Word has length 23 [2021-06-05 13:45:30,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:30,928 INFO L482 AbstractCegarLoop]: Abstraction has 7625 states and 23997 transitions. [2021-06-05 13:45:30,928 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 13:45:30,928 INFO L276 IsEmpty]: Start isEmpty. Operand 7625 states and 23997 transitions. [2021-06-05 13:45:30,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:30,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:30,936 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:31,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable493 [2021-06-05 13:45:31,137 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:31,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:31,137 INFO L82 PathProgramCache]: Analyzing trace with hash -2075509483, now seen corresponding path program 287 times [2021-06-05 13:45:31,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:31,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259834110] [2021-06-05 13:45:31,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:31,254 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 13:45:31,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:31,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259834110] [2021-06-05 13:45:31,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259834110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:31,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116335876] [2021-06-05 13:45:31,254 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 13:45:31,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:45:31,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:31,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:31,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:31,427 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 13:45:31,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116335876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:31,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:31,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-05 13:45:31,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243953440] [2021-06-05 13:45:31,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:31,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:31,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:31,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:31,428 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 13:45:31,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:31,636 INFO L93 Difference]: Finished difference Result 7842 states and 24373 transitions. [2021-06-05 13:45:31,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:45:31,637 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 13:45:31,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:31,646 INFO L225 Difference]: With dead ends: 7842 [2021-06-05 13:45:31,647 INFO L226 Difference]: Without dead ends: 7829 [2021-06-05 13:45:31,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 261.4ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:31,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7829 states. [2021-06-05 13:45:31,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7829 to 7608. [2021-06-05 13:45:31,739 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 13:45:31,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7608 states to 7608 states and 23929 transitions. [2021-06-05 13:45:31,753 INFO L78 Accepts]: Start accepts. Automaton has 7608 states and 23929 transitions. Word has length 23 [2021-06-05 13:45:31,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:31,753 INFO L482 AbstractCegarLoop]: Abstraction has 7608 states and 23929 transitions. [2021-06-05 13:45:31,753 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 13:45:31,753 INFO L276 IsEmpty]: Start isEmpty. Operand 7608 states and 23929 transitions. [2021-06-05 13:45:31,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:31,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:31,798 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:31,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-05 13:45:31,998 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:31,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:31,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1973437307, now seen corresponding path program 288 times [2021-06-05 13:45:31,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:31,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706790214] [2021-06-05 13:45:31,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:32,143 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 13:45:32,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:32,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706790214] [2021-06-05 13:45:32,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706790214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:32,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863067493] [2021-06-05 13:45:32,144 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 13:45:32,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:45:32,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:32,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:32,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:32,328 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 13:45:32,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863067493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:32,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:32,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-06-05 13:45:32,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531437211] [2021-06-05 13:45:32,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:45:32,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:32,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:45:32,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:32,329 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 13:45:32,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:32,641 INFO L93 Difference]: Finished difference Result 8242 states and 25517 transitions. [2021-06-05 13:45:32,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:45:32,642 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 13:45:32,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:32,652 INFO L225 Difference]: With dead ends: 8242 [2021-06-05 13:45:32,652 INFO L226 Difference]: Without dead ends: 8225 [2021-06-05 13:45:32,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 320.9ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:32,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8225 states. [2021-06-05 13:45:32,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8225 to 7836. [2021-06-05 13:45:32,752 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 13:45:32,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7836 states to 7836 states and 24710 transitions. [2021-06-05 13:45:32,766 INFO L78 Accepts]: Start accepts. Automaton has 7836 states and 24710 transitions. Word has length 23 [2021-06-05 13:45:32,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:32,766 INFO L482 AbstractCegarLoop]: Abstraction has 7836 states and 24710 transitions. [2021-06-05 13:45:32,767 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 13:45:32,767 INFO L276 IsEmpty]: Start isEmpty. Operand 7836 states and 24710 transitions. [2021-06-05 13:45:32,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:32,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:32,775 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:32,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 13:45:32,982 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:32,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:32,982 INFO L82 PathProgramCache]: Analyzing trace with hash -706827265, now seen corresponding path program 289 times [2021-06-05 13:45:32,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:32,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737730664] [2021-06-05 13:45:32,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:33,151 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 13:45:33,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:33,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737730664] [2021-06-05 13:45:33,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737730664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:33,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446294563] [2021-06-05 13:45:33,151 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 13:45:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:33,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:33,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:33,318 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 13:45:33,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446294563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:33,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:33,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-05 13:45:33,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554937415] [2021-06-05 13:45:33,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:33,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:33,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:33,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:33,319 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 13:45:33,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:33,585 INFO L93 Difference]: Finished difference Result 8244 states and 25471 transitions. [2021-06-05 13:45:33,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:45:33,585 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 13:45:33,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:33,596 INFO L225 Difference]: With dead ends: 8244 [2021-06-05 13:45:33,596 INFO L226 Difference]: Without dead ends: 8226 [2021-06-05 13:45:33,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 286.3ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:45:33,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8226 states. [2021-06-05 13:45:33,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8226 to 7776. [2021-06-05 13:45:33,691 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 13:45:33,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7776 states to 7776 states and 24477 transitions. [2021-06-05 13:45:33,705 INFO L78 Accepts]: Start accepts. Automaton has 7776 states and 24477 transitions. Word has length 23 [2021-06-05 13:45:33,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:33,705 INFO L482 AbstractCegarLoop]: Abstraction has 7776 states and 24477 transitions. [2021-06-05 13:45:33,705 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 13:45:33,705 INFO L276 IsEmpty]: Start isEmpty. Operand 7776 states and 24477 transitions. [2021-06-05 13:45:33,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:33,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:33,714 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:33,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable502,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:33,915 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:33,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:33,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1508846203, now seen corresponding path program 290 times [2021-06-05 13:45:33,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:33,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703048445] [2021-06-05 13:45:33,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:33,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:34,043 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 13:45:34,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:34,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703048445] [2021-06-05 13:45:34,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703048445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:34,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56212925] [2021-06-05 13:45:34,044 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 13:45:34,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:34,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:34,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:34,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:34,203 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 13:45:34,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56212925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:34,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:34,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-05 13:45:34,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838176650] [2021-06-05 13:45:34,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:34,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:34,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:34,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:34,204 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 13:45:34,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:34,555 INFO L93 Difference]: Finished difference Result 8185 states and 25224 transitions. [2021-06-05 13:45:34,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:45:34,555 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 13:45:34,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:34,563 INFO L225 Difference]: With dead ends: 8185 [2021-06-05 13:45:34,563 INFO L226 Difference]: Without dead ends: 8163 [2021-06-05 13:45:34,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 288.2ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:34,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8163 states. [2021-06-05 13:45:34,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8163 to 7750. [2021-06-05 13:45:34,644 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 13:45:34,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7750 states to 7750 states and 24374 transitions. [2021-06-05 13:45:34,657 INFO L78 Accepts]: Start accepts. Automaton has 7750 states and 24374 transitions. Word has length 23 [2021-06-05 13:45:34,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:34,657 INFO L482 AbstractCegarLoop]: Abstraction has 7750 states and 24374 transitions. [2021-06-05 13:45:34,657 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 13:45:34,657 INFO L276 IsEmpty]: Start isEmpty. Operand 7750 states and 24374 transitions. [2021-06-05 13:45:34,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:34,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:34,664 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:34,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:34,865 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:34,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:34,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1475246975, now seen corresponding path program 291 times [2021-06-05 13:45:34,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:34,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58610576] [2021-06-05 13:45:34,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:34,988 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 13:45:34,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:34,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58610576] [2021-06-05 13:45:34,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58610576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:34,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444672693] [2021-06-05 13:45:34,988 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 13:45:35,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:45:35,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:35,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:35,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:35,170 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 13:45:35,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444672693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:35,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:35,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-05 13:45:35,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640667597] [2021-06-05 13:45:35,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:35,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:35,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:35,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:35,170 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 13:45:35,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:35,509 INFO L93 Difference]: Finished difference Result 8091 states and 24993 transitions. [2021-06-05 13:45:35,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:35,509 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 13:45:35,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:35,520 INFO L225 Difference]: With dead ends: 8091 [2021-06-05 13:45:35,521 INFO L226 Difference]: Without dead ends: 8065 [2021-06-05 13:45:35,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 315.4ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:45:35,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8065 states. [2021-06-05 13:45:35,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8065 to 7731. [2021-06-05 13:45:35,623 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 13:45:35,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7731 states to 7731 states and 24310 transitions. [2021-06-05 13:45:35,636 INFO L78 Accepts]: Start accepts. Automaton has 7731 states and 24310 transitions. Word has length 23 [2021-06-05 13:45:35,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:35,636 INFO L482 AbstractCegarLoop]: Abstraction has 7731 states and 24310 transitions. [2021-06-05 13:45:35,636 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 13:45:35,637 INFO L276 IsEmpty]: Start isEmpty. Operand 7731 states and 24310 transitions. [2021-06-05 13:45:35,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:35,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:35,646 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:35,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:35,846 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:35,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:35,846 INFO L82 PathProgramCache]: Analyzing trace with hash 433670907, now seen corresponding path program 292 times [2021-06-05 13:45:35,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:35,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409924264] [2021-06-05 13:45:35,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:35,979 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 13:45:35,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:35,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409924264] [2021-06-05 13:45:35,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409924264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:35,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837194393] [2021-06-05 13:45:35,979 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 13:45:36,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:36,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:36,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:36,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:36,137 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 13:45:36,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837194393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:36,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:36,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-05 13:45:36,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491581194] [2021-06-05 13:45:36,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:36,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:36,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:36,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:36,138 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 13:45:36,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:36,454 INFO L93 Difference]: Finished difference Result 7972 states and 24730 transitions. [2021-06-05 13:45:36,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:45:36,454 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 13:45:36,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:36,463 INFO L225 Difference]: With dead ends: 7972 [2021-06-05 13:45:36,463 INFO L226 Difference]: Without dead ends: 7965 [2021-06-05 13:45:36,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 285.2ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:36,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7965 states. [2021-06-05 13:45:36,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7965 to 7731. [2021-06-05 13:45:36,554 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 13:45:36,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7731 states to 7731 states and 24310 transitions. [2021-06-05 13:45:36,568 INFO L78 Accepts]: Start accepts. Automaton has 7731 states and 24310 transitions. Word has length 23 [2021-06-05 13:45:36,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:36,568 INFO L482 AbstractCegarLoop]: Abstraction has 7731 states and 24310 transitions. [2021-06-05 13:45:36,568 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 13:45:36,568 INFO L276 IsEmpty]: Start isEmpty. Operand 7731 states and 24310 transitions. [2021-06-05 13:45:36,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:36,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:36,578 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:36,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-06-05 13:45:36,797 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:36,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:36,797 INFO L82 PathProgramCache]: Analyzing trace with hash -906289319, now seen corresponding path program 293 times [2021-06-05 13:45:36,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:36,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457074461] [2021-06-05 13:45:36,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:36,958 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 13:45:36,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:36,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457074461] [2021-06-05 13:45:36,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457074461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:36,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782865814] [2021-06-05 13:45:36,958 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 13:45:36,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:45:36,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:36,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:36,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:37,169 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 13:45:37,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782865814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:37,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:37,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-05 13:45:37,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826689143] [2021-06-05 13:45:37,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:37,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:37,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:37,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:37,170 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 13:45:37,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:37,378 INFO L93 Difference]: Finished difference Result 7915 states and 24623 transitions. [2021-06-05 13:45:37,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:45:37,378 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 13:45:37,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:37,389 INFO L225 Difference]: With dead ends: 7915 [2021-06-05 13:45:37,389 INFO L226 Difference]: Without dead ends: 7902 [2021-06-05 13:45:37,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 247.4ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:37,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7902 states. [2021-06-05 13:45:37,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7902 to 7707. [2021-06-05 13:45:37,487 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 13:45:37,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7707 states to 7707 states and 24211 transitions. [2021-06-05 13:45:37,503 INFO L78 Accepts]: Start accepts. Automaton has 7707 states and 24211 transitions. Word has length 23 [2021-06-05 13:45:37,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:37,503 INFO L482 AbstractCegarLoop]: Abstraction has 7707 states and 24211 transitions. [2021-06-05 13:45:37,503 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 13:45:37,503 INFO L276 IsEmpty]: Start isEmpty. Operand 7707 states and 24211 transitions. [2021-06-05 13:45:37,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:37,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:37,512 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:37,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-06-05 13:45:37,713 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:37,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:37,713 INFO L82 PathProgramCache]: Analyzing trace with hash -2125386177, now seen corresponding path program 294 times [2021-06-05 13:45:37,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:37,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63901231] [2021-06-05 13:45:37,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:37,835 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 13:45:37,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:37,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63901231] [2021-06-05 13:45:37,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63901231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:37,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303504538] [2021-06-05 13:45:37,836 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 13:45:37,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:45:37,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:37,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:37,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:37,993 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 13:45:37,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303504538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:37,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:37,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2021-06-05 13:45:37,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661923927] [2021-06-05 13:45:37,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:45:37,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:37,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:45:37,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:37,994 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 13:45:38,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:38,310 INFO L93 Difference]: Finished difference Result 8283 states and 25598 transitions. [2021-06-05 13:45:38,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:45:38,310 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 13:45:38,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:38,320 INFO L225 Difference]: With dead ends: 8283 [2021-06-05 13:45:38,320 INFO L226 Difference]: Without dead ends: 8266 [2021-06-05 13:45:38,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 266.1ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:38,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8266 states. [2021-06-05 13:45:38,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8266 to 7931. [2021-06-05 13:45:38,406 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 13:45:38,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7931 states to 7931 states and 24963 transitions. [2021-06-05 13:45:38,419 INFO L78 Accepts]: Start accepts. Automaton has 7931 states and 24963 transitions. Word has length 23 [2021-06-05 13:45:38,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:38,419 INFO L482 AbstractCegarLoop]: Abstraction has 7931 states and 24963 transitions. [2021-06-05 13:45:38,419 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 13:45:38,419 INFO L276 IsEmpty]: Start isEmpty. Operand 7931 states and 24963 transitions. [2021-06-05 13:45:38,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:38,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:38,428 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:38,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:38,629 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:38,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:38,629 INFO L82 PathProgramCache]: Analyzing trace with hash -510683453, now seen corresponding path program 295 times [2021-06-05 13:45:38,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:38,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748945634] [2021-06-05 13:45:38,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:38,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:38,784 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 13:45:38,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:38,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748945634] [2021-06-05 13:45:38,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748945634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:38,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616247348] [2021-06-05 13:45:38,785 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 13:45:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:38,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:38,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:38,930 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 13:45:38,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616247348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:38,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:38,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-05 13:45:38,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584740726] [2021-06-05 13:45:38,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:38,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:38,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:38,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:38,931 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 13:45:39,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:39,255 INFO L93 Difference]: Finished difference Result 8281 states and 25535 transitions. [2021-06-05 13:45:39,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:45:39,255 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 13:45:39,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:39,266 INFO L225 Difference]: With dead ends: 8281 [2021-06-05 13:45:39,266 INFO L226 Difference]: Without dead ends: 8263 [2021-06-05 13:45:39,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 296.8ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:45:39,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8263 states. [2021-06-05 13:45:39,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8263 to 7865. [2021-06-05 13:45:39,379 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 13:45:39,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7865 states to 7865 states and 24720 transitions. [2021-06-05 13:45:39,392 INFO L78 Accepts]: Start accepts. Automaton has 7865 states and 24720 transitions. Word has length 23 [2021-06-05 13:45:39,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:39,392 INFO L482 AbstractCegarLoop]: Abstraction has 7865 states and 24720 transitions. [2021-06-05 13:45:39,392 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 13:45:39,393 INFO L276 IsEmpty]: Start isEmpty. Operand 7865 states and 24720 transitions. [2021-06-05 13:45:39,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:39,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:39,401 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:39,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-06-05 13:45:39,602 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:39,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:39,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1704990015, now seen corresponding path program 296 times [2021-06-05 13:45:39,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:39,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516456615] [2021-06-05 13:45:39,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:39,734 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 13:45:39,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:39,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516456615] [2021-06-05 13:45:39,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516456615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:39,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267930757] [2021-06-05 13:45:39,734 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 13:45:39,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:39,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:39,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:39,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:39,907 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 13:45:39,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267930757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:39,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:39,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-05 13:45:39,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806400883] [2021-06-05 13:45:39,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:39,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:39,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:39,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:39,915 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 13:45:40,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:40,287 INFO L93 Difference]: Finished difference Result 8238 states and 25326 transitions. [2021-06-05 13:45:40,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:40,288 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 13:45:40,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:40,299 INFO L225 Difference]: With dead ends: 8238 [2021-06-05 13:45:40,299 INFO L226 Difference]: Without dead ends: 8216 [2021-06-05 13:45:40,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 300.0ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:40,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8216 states. [2021-06-05 13:45:40,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8216 to 7840. [2021-06-05 13:45:40,403 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 13:45:40,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7840 states to 7840 states and 24621 transitions. [2021-06-05 13:45:40,418 INFO L78 Accepts]: Start accepts. Automaton has 7840 states and 24621 transitions. Word has length 23 [2021-06-05 13:45:40,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:40,418 INFO L482 AbstractCegarLoop]: Abstraction has 7840 states and 24621 transitions. [2021-06-05 13:45:40,418 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 13:45:40,418 INFO L276 IsEmpty]: Start isEmpty. Operand 7840 states and 24621 transitions. [2021-06-05 13:45:40,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:40,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:40,427 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:40,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2021-06-05 13:45:40,627 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:40,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:40,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1671390787, now seen corresponding path program 297 times [2021-06-05 13:45:40,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:40,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085991618] [2021-06-05 13:45:40,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:40,747 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 13:45:40,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:40,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085991618] [2021-06-05 13:45:40,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085991618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:40,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842460313] [2021-06-05 13:45:40,748 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 13:45:40,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:45:40,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:40,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:40,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:40,891 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 13:45:40,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842460313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:40,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:40,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-05 13:45:40,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688889024] [2021-06-05 13:45:40,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:40,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:40,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:40,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:40,892 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 13:45:41,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:41,247 INFO L93 Difference]: Finished difference Result 8244 states and 25274 transitions. [2021-06-05 13:45:41,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:45:41,247 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 13:45:41,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:41,257 INFO L225 Difference]: With dead ends: 8244 [2021-06-05 13:45:41,257 INFO L226 Difference]: Without dead ends: 8218 [2021-06-05 13:45:41,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 280.9ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:45:41,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8218 states. [2021-06-05 13:45:41,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8218 to 7816. [2021-06-05 13:45:41,350 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 13:45:41,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7816 states to 7816 states and 24536 transitions. [2021-06-05 13:45:41,365 INFO L78 Accepts]: Start accepts. Automaton has 7816 states and 24536 transitions. Word has length 23 [2021-06-05 13:45:41,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:41,365 INFO L482 AbstractCegarLoop]: Abstraction has 7816 states and 24536 transitions. [2021-06-05 13:45:41,365 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 13:45:41,365 INFO L276 IsEmpty]: Start isEmpty. Operand 7816 states and 24536 transitions. [2021-06-05 13:45:41,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:41,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:41,375 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:41,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:41,577 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:41,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:41,577 INFO L82 PathProgramCache]: Analyzing trace with hash 629814719, now seen corresponding path program 298 times [2021-06-05 13:45:41,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:41,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14151890] [2021-06-05 13:45:41,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:41,701 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 13:45:41,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:41,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14151890] [2021-06-05 13:45:41,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14151890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:41,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948950923] [2021-06-05 13:45:41,701 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 13:45:41,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:41,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:41,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:41,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:41,839 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 13:45:41,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948950923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:41,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:41,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-05 13:45:41,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489802387] [2021-06-05 13:45:41,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:41,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:41,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:41,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:41,840 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 13:45:42,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:42,248 INFO L93 Difference]: Finished difference Result 8147 states and 25070 transitions. [2021-06-05 13:45:42,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:45:42,249 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 13:45:42,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:42,259 INFO L225 Difference]: With dead ends: 8147 [2021-06-05 13:45:42,259 INFO L226 Difference]: Without dead ends: 8117 [2021-06-05 13:45:42,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 297.8ms TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:45:42,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-06-05 13:45:42,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 7795. [2021-06-05 13:45:42,348 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 13:45:42,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7795 states to 7795 states and 24470 transitions. [2021-06-05 13:45:42,361 INFO L78 Accepts]: Start accepts. Automaton has 7795 states and 24470 transitions. Word has length 23 [2021-06-05 13:45:42,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:42,361 INFO L482 AbstractCegarLoop]: Abstraction has 7795 states and 24470 transitions. [2021-06-05 13:45:42,362 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 13:45:42,362 INFO L276 IsEmpty]: Start isEmpty. Operand 7795 states and 24470 transitions. [2021-06-05 13:45:42,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:42,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:42,370 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:42,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:42,570 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:42,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:42,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1594272317, now seen corresponding path program 299 times [2021-06-05 13:45:42,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:42,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804560642] [2021-06-05 13:45:42,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:42,707 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 13:45:42,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:42,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804560642] [2021-06-05 13:45:42,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804560642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:42,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829448493] [2021-06-05 13:45:42,708 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 13:45:42,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:45:42,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:42,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:42,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:42,852 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 13:45:42,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829448493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:42,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:42,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-05 13:45:42,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893718966] [2021-06-05 13:45:42,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:42,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:42,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:42,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:42,852 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 13:45:43,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:43,245 INFO L93 Difference]: Finished difference Result 8028 states and 24837 transitions. [2021-06-05 13:45:43,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:45:43,245 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 13:45:43,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:43,256 INFO L225 Difference]: With dead ends: 8028 [2021-06-05 13:45:43,256 INFO L226 Difference]: Without dead ends: 8021 [2021-06-05 13:45:43,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 288.8ms TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:45:43,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8021 states. [2021-06-05 13:45:43,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8021 to 7797. [2021-06-05 13:45:43,348 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 13:45:43,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7797 states to 7797 states and 24473 transitions. [2021-06-05 13:45:43,362 INFO L78 Accepts]: Start accepts. Automaton has 7797 states and 24473 transitions. Word has length 23 [2021-06-05 13:45:43,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:43,362 INFO L482 AbstractCegarLoop]: Abstraction has 7797 states and 24473 transitions. [2021-06-05 13:45:43,362 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 13:45:43,363 INFO L276 IsEmpty]: Start isEmpty. Operand 7797 states and 24473 transitions. [2021-06-05 13:45:43,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:43,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:43,371 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:43,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-05 13:45:43,572 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:43,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:43,572 INFO L82 PathProgramCache]: Analyzing trace with hash 979797397, now seen corresponding path program 300 times [2021-06-05 13:45:43,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:43,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364607439] [2021-06-05 13:45:43,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:43,688 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 13:45:43,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:43,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364607439] [2021-06-05 13:45:43,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364607439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:43,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375220763] [2021-06-05 13:45:43,688 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 13:45:43,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:45:43,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:43,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:43,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:43,851 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 13:45:43,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375220763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:43,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:43,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-05 13:45:43,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723484527] [2021-06-05 13:45:43,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:43,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:43,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:43,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:43,852 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 13:45:44,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:44,066 INFO L93 Difference]: Finished difference Result 7916 states and 24667 transitions. [2021-06-05 13:45:44,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:45:44,067 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 13:45:44,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:44,078 INFO L225 Difference]: With dead ends: 7916 [2021-06-05 13:45:44,078 INFO L226 Difference]: Without dead ends: 7903 [2021-06-05 13:45:44,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 253.2ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:44,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7903 states. [2021-06-05 13:45:44,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7903 to 7773. [2021-06-05 13:45:44,188 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 13:45:44,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7773 states to 7773 states and 24400 transitions. [2021-06-05 13:45:44,253 INFO L78 Accepts]: Start accepts. Automaton has 7773 states and 24400 transitions. Word has length 23 [2021-06-05 13:45:44,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:44,253 INFO L482 AbstractCegarLoop]: Abstraction has 7773 states and 24400 transitions. [2021-06-05 13:45:44,253 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 13:45:44,253 INFO L276 IsEmpty]: Start isEmpty. Operand 7773 states and 24400 transitions. [2021-06-05 13:45:44,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:44,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:44,261 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:44,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-06-05 13:45:44,462 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:44,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:44,462 INFO L82 PathProgramCache]: Analyzing trace with hash -339895301, now seen corresponding path program 301 times [2021-06-05 13:45:44,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:44,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89846382] [2021-06-05 13:45:44,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:44,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:44,589 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 13:45:44,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:44,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89846382] [2021-06-05 13:45:44,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89846382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:44,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526298278] [2021-06-05 13:45:44,589 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 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 13:45:44,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:44,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:44,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:44,755 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 13:45:44,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526298278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:44,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:44,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 13:45:44,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716073756] [2021-06-05 13:45:44,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:45:44,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:44,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:45:44,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:44,756 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 13:45:45,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:45,089 INFO L93 Difference]: Finished difference Result 8383 states and 25880 transitions. [2021-06-05 13:45:45,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:45,089 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 13:45:45,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:45,100 INFO L225 Difference]: With dead ends: 8383 [2021-06-05 13:45:45,101 INFO L226 Difference]: Without dead ends: 8366 [2021-06-05 13:45:45,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 283.1ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:45,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8366 states. [2021-06-05 13:45:45,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8366 to 8073. [2021-06-05 13:45:45,204 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 13:45:45,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8073 states to 8073 states and 25334 transitions. [2021-06-05 13:45:45,219 INFO L78 Accepts]: Start accepts. Automaton has 8073 states and 25334 transitions. Word has length 23 [2021-06-05 13:45:45,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:45,219 INFO L482 AbstractCegarLoop]: Abstraction has 8073 states and 25334 transitions. [2021-06-05 13:45:45,219 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 13:45:45,219 INFO L276 IsEmpty]: Start isEmpty. Operand 8073 states and 25334 transitions. [2021-06-05 13:45:45,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:45,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:45,229 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:45,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable538 [2021-06-05 13:45:45,429 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:45,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:45,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1274807423, now seen corresponding path program 302 times [2021-06-05 13:45:45,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:45,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638165995] [2021-06-05 13:45:45,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:45,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:45,570 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 13:45:45,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:45,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638165995] [2021-06-05 13:45:45,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638165995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:45,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266219528] [2021-06-05 13:45:45,571 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 13:45:45,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:45,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:45,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:45,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:45,721 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 13:45:45,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266219528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:45,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:45,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 13:45:45,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861697245] [2021-06-05 13:45:45,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:45,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:45,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:45,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:45,722 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 13:45:46,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:46,018 INFO L93 Difference]: Finished difference Result 8381 states and 25825 transitions. [2021-06-05 13:45:46,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:45:46,019 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 13:45:46,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:46,029 INFO L225 Difference]: With dead ends: 8381 [2021-06-05 13:45:46,029 INFO L226 Difference]: Without dead ends: 8365 [2021-06-05 13:45:46,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 278.8ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:45:46,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8365 states. [2021-06-05 13:45:46,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8365 to 8044. [2021-06-05 13:45:46,125 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 13:45:46,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8044 states to 8044 states and 25211 transitions. [2021-06-05 13:45:46,139 INFO L78 Accepts]: Start accepts. Automaton has 8044 states and 25211 transitions. Word has length 23 [2021-06-05 13:45:46,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:46,140 INFO L482 AbstractCegarLoop]: Abstraction has 8044 states and 25211 transitions. [2021-06-05 13:45:46,140 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 13:45:46,140 INFO L276 IsEmpty]: Start isEmpty. Operand 8044 states and 25211 transitions. [2021-06-05 13:45:46,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:46,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:46,149 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:46,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-05 13:45:46,349 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:46,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:46,349 INFO L82 PathProgramCache]: Analyzing trace with hash -804486405, now seen corresponding path program 303 times [2021-06-05 13:45:46,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:46,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757998657] [2021-06-05 13:45:46,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:46,472 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 13:45:46,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:46,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757998657] [2021-06-05 13:45:46,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757998657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:46,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103046380] [2021-06-05 13:45:46,472 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 13:45:46,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:45:46,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:46,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:46,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:46,625 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 13:45:46,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103046380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:46,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:46,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 13:45:46,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873084618] [2021-06-05 13:45:46,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:46,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:46,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:46,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:46,626 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 13:45:46,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:46,988 INFO L93 Difference]: Finished difference Result 8378 states and 25745 transitions. [2021-06-05 13:45:46,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:45:46,988 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 13:45:46,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:46,999 INFO L225 Difference]: With dead ends: 8378 [2021-06-05 13:45:46,999 INFO L226 Difference]: Without dead ends: 8360 [2021-06-05 13:45:47,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 296.2ms TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:47,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8360 states. [2021-06-05 13:45:47,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8360 to 8008. [2021-06-05 13:45:47,099 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 13:45:47,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8008 states to 8008 states and 25058 transitions. [2021-06-05 13:45:47,114 INFO L78 Accepts]: Start accepts. Automaton has 8008 states and 25058 transitions. Word has length 23 [2021-06-05 13:45:47,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:47,114 INFO L482 AbstractCegarLoop]: Abstraction has 8008 states and 25058 transitions. [2021-06-05 13:45:47,114 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 13:45:47,114 INFO L276 IsEmpty]: Start isEmpty. Operand 8008 states and 25058 transitions. [2021-06-05 13:45:47,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:47,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:47,123 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:47,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable544 [2021-06-05 13:45:47,323 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:47,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:47,324 INFO L82 PathProgramCache]: Analyzing trace with hash -838085633, now seen corresponding path program 304 times [2021-06-05 13:45:47,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:47,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884759756] [2021-06-05 13:45:47,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:47,505 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 13:45:47,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:47,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884759756] [2021-06-05 13:45:47,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884759756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:47,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037333565] [2021-06-05 13:45:47,506 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 13:45:47,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:47,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:47,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:47,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:47,651 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 13:45:47,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037333565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:47,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:47,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 13:45:47,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998413274] [2021-06-05 13:45:47,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:47,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:47,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:47,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:47,652 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 13:45:48,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:48,040 INFO L93 Difference]: Finished difference Result 8369 states and 25633 transitions. [2021-06-05 13:45:48,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:45:48,040 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 13:45:48,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:48,051 INFO L225 Difference]: With dead ends: 8369 [2021-06-05 13:45:48,052 INFO L226 Difference]: Without dead ends: 8349 [2021-06-05 13:45:48,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 346.2ms TimeCoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:45:48,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8349 states. [2021-06-05 13:45:48,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8349 to 7964. [2021-06-05 13:45:48,155 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 13:45:48,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 24897 transitions. [2021-06-05 13:45:48,170 INFO L78 Accepts]: Start accepts. Automaton has 7964 states and 24897 transitions. Word has length 23 [2021-06-05 13:45:48,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:48,170 INFO L482 AbstractCegarLoop]: Abstraction has 7964 states and 24897 transitions. [2021-06-05 13:45:48,171 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 13:45:48,171 INFO L276 IsEmpty]: Start isEmpty. Operand 7964 states and 24897 transitions. [2021-06-05 13:45:48,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:48,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:48,180 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:48,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-06-05 13:45:48,380 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:48,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:48,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1879661701, now seen corresponding path program 305 times [2021-06-05 13:45:48,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:48,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938996359] [2021-06-05 13:45:48,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:48,536 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 13:45:48,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:48,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938996359] [2021-06-05 13:45:48,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938996359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:48,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506855380] [2021-06-05 13:45:48,536 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 13:45:48,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:45:48,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:48,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:48,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:48,698 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 13:45:48,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506855380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:48,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:48,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 13:45:48,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953709803] [2021-06-05 13:45:48,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:48,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:48,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:48,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:48,699 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 13:45:49,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:49,107 INFO L93 Difference]: Finished difference Result 8358 states and 25520 transitions. [2021-06-05 13:45:49,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:45:49,107 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 13:45:49,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:49,118 INFO L225 Difference]: With dead ends: 8358 [2021-06-05 13:45:49,118 INFO L226 Difference]: Without dead ends: 8336 [2021-06-05 13:45:49,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 345.0ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:45:49,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8336 states. [2021-06-05 13:45:49,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8336 to 7922. [2021-06-05 13:45:49,241 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 13:45:49,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7922 states to 7922 states and 24753 transitions. [2021-06-05 13:45:49,255 INFO L78 Accepts]: Start accepts. Automaton has 7922 states and 24753 transitions. Word has length 23 [2021-06-05 13:45:49,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:49,255 INFO L482 AbstractCegarLoop]: Abstraction has 7922 states and 24753 transitions. [2021-06-05 13:45:49,255 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 13:45:49,255 INFO L276 IsEmpty]: Start isEmpty. Operand 7922 states and 24753 transitions. [2021-06-05 13:45:49,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:49,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:49,264 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:49,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:49,465 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:49,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:49,465 INFO L82 PathProgramCache]: Analyzing trace with hash 191218559, now seen corresponding path program 306 times [2021-06-05 13:45:49,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:49,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33740619] [2021-06-05 13:45:49,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:49,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:49,659 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 13:45:49,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:49,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33740619] [2021-06-05 13:45:49,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33740619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:49,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068460807] [2021-06-05 13:45:49,659 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 13:45:49,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:45:49,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:49,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:49,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:49,804 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 13:45:49,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068460807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:49,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:49,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 13:45:49,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125658913] [2021-06-05 13:45:49,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:49,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:49,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:49,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:49,805 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 13:45:50,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:50,255 INFO L93 Difference]: Finished difference Result 8208 states and 25204 transitions. [2021-06-05 13:45:50,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:45:50,255 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 13:45:50,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:50,264 INFO L225 Difference]: With dead ends: 8208 [2021-06-05 13:45:50,264 INFO L226 Difference]: Without dead ends: 8184 [2021-06-05 13:45:50,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 358.4ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:45:50,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8184 states. [2021-06-05 13:45:50,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8184 to 7881. [2021-06-05 13:45:50,350 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 13:45:50,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7881 states to 7881 states and 24638 transitions. [2021-06-05 13:45:50,365 INFO L78 Accepts]: Start accepts. Automaton has 7881 states and 24638 transitions. Word has length 23 [2021-06-05 13:45:50,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:50,365 INFO L482 AbstractCegarLoop]: Abstraction has 7881 states and 24638 transitions. [2021-06-05 13:45:50,365 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 13:45:50,365 INFO L276 IsEmpty]: Start isEmpty. Operand 7881 states and 24638 transitions. [2021-06-05 13:45:50,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:50,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:50,374 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:50,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-06-05 13:45:50,575 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:50,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:50,575 INFO L82 PathProgramCache]: Analyzing trace with hash -36002821, now seen corresponding path program 307 times [2021-06-05 13:45:50,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:50,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951325604] [2021-06-05 13:45:50,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:50,711 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 13:45:50,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:50,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951325604] [2021-06-05 13:45:50,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951325604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:50,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626833592] [2021-06-05 13:45:50,711 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 13:45:50,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:50,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:50,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:50,850 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 13:45:50,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626833592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:50,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:50,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 13:45:50,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576163837] [2021-06-05 13:45:50,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:50,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:50,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:50,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:50,850 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 13:45:51,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:51,294 INFO L93 Difference]: Finished difference Result 8087 states and 24955 transitions. [2021-06-05 13:45:51,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:45:51,295 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 13:45:51,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:51,305 INFO L225 Difference]: With dead ends: 8087 [2021-06-05 13:45:51,305 INFO L226 Difference]: Without dead ends: 8080 [2021-06-05 13:45:51,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 304.4ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:45:51,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8080 states. [2021-06-05 13:45:51,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8080 to 7893. [2021-06-05 13:45:51,397 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 13:45:51,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7893 states to 7893 states and 24656 transitions. [2021-06-05 13:45:51,411 INFO L78 Accepts]: Start accepts. Automaton has 7893 states and 24656 transitions. Word has length 23 [2021-06-05 13:45:51,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:51,411 INFO L482 AbstractCegarLoop]: Abstraction has 7893 states and 24656 transitions. [2021-06-05 13:45:51,411 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 13:45:51,411 INFO L276 IsEmpty]: Start isEmpty. Operand 7893 states and 24656 transitions. [2021-06-05 13:45:51,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:51,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:51,420 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:51,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable556,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:51,620 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:51,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:51,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1252511357, now seen corresponding path program 308 times [2021-06-05 13:45:51,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:51,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954450931] [2021-06-05 13:45:51,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:51,744 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 13:45:51,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:51,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954450931] [2021-06-05 13:45:51,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954450931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:51,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583452609] [2021-06-05 13:45:51,744 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 13:45:51,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:51,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:51,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:51,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:51,984 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 13:45:51,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583452609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:51,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:51,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 13:45:51,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312231691] [2021-06-05 13:45:51,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:45:51,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:51,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:45:51,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:51,986 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 13:45:52,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:52,237 INFO L93 Difference]: Finished difference Result 8261 states and 25496 transitions. [2021-06-05 13:45:52,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:45:52,238 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 13:45:52,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:52,249 INFO L225 Difference]: With dead ends: 8261 [2021-06-05 13:45:52,249 INFO L226 Difference]: Without dead ends: 8251 [2021-06-05 13:45:52,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 337.0ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:45:52,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2021-06-05 13:45:52,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 7953. [2021-06-05 13:45:52,364 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 13:45:52,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7953 states to 7953 states and 24875 transitions. [2021-06-05 13:45:52,379 INFO L78 Accepts]: Start accepts. Automaton has 7953 states and 24875 transitions. Word has length 23 [2021-06-05 13:45:52,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:52,379 INFO L482 AbstractCegarLoop]: Abstraction has 7953 states and 24875 transitions. [2021-06-05 13:45:52,379 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 13:45:52,379 INFO L276 IsEmpty]: Start isEmpty. Operand 7953 states and 24875 transitions. [2021-06-05 13:45:52,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:52,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:52,388 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:52,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable559 [2021-06-05 13:45:52,601 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:52,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:52,601 INFO L82 PathProgramCache]: Analyzing trace with hash 362191367, now seen corresponding path program 309 times [2021-06-05 13:45:52,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:52,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665988253] [2021-06-05 13:45:52,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:52,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:52,741 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 13:45:52,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:52,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665988253] [2021-06-05 13:45:52,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665988253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:52,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318083479] [2021-06-05 13:45:52,742 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 13:45:52,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:45:52,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:52,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:52,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:52,916 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 13:45:52,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318083479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:52,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:52,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-05 13:45:52,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052959042] [2021-06-05 13:45:52,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:52,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:52,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:52,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:52,917 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 13:45:53,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:53,129 INFO L93 Difference]: Finished difference Result 8243 states and 25454 transitions. [2021-06-05 13:45:53,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:45:53,130 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 13:45:53,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:53,141 INFO L225 Difference]: With dead ends: 8243 [2021-06-05 13:45:53,142 INFO L226 Difference]: Without dead ends: 8236 [2021-06-05 13:45:53,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 270.9ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:45:53,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8236 states. [2021-06-05 13:45:53,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8236 to 7951. [2021-06-05 13:45:53,233 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 13:45:53,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7951 states to 7951 states and 24867 transitions. [2021-06-05 13:45:53,245 INFO L78 Accepts]: Start accepts. Automaton has 7951 states and 24867 transitions. Word has length 23 [2021-06-05 13:45:53,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:53,245 INFO L482 AbstractCegarLoop]: Abstraction has 7951 states and 24867 transitions. [2021-06-05 13:45:53,245 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 13:45:53,246 INFO L276 IsEmpty]: Start isEmpty. Operand 7951 states and 24867 transitions. [2021-06-05 13:45:53,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:53,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:53,253 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:53,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-06-05 13:45:53,454 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:53,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:53,454 INFO L82 PathProgramCache]: Analyzing trace with hash -681056551, now seen corresponding path program 310 times [2021-06-05 13:45:53,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:53,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702120354] [2021-06-05 13:45:53,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:53,571 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 13:45:53,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:53,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702120354] [2021-06-05 13:45:53,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702120354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:53,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677422456] [2021-06-05 13:45:53,572 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 13:45:53,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:53,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:53,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:53,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:53,749 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 13:45:53,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677422456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:53,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:53,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-05 13:45:53,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55480581] [2021-06-05 13:45:53,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:53,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:53,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:53,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:53,749 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 13:45:53,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:53,973 INFO L93 Difference]: Finished difference Result 8146 states and 25212 transitions. [2021-06-05 13:45:53,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:45:53,973 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 13:45:53,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:54,000 INFO L225 Difference]: With dead ends: 8146 [2021-06-05 13:45:54,000 INFO L226 Difference]: Without dead ends: 8139 [2021-06-05 13:45:54,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 269.9ms TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:54,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8139 states. [2021-06-05 13:45:54,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8139 to 7950. [2021-06-05 13:45:54,097 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 13:45:54,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7950 states to 7950 states and 24864 transitions. [2021-06-05 13:45:54,111 INFO L78 Accepts]: Start accepts. Automaton has 7950 states and 24864 transitions. Word has length 23 [2021-06-05 13:45:54,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:54,111 INFO L482 AbstractCegarLoop]: Abstraction has 7950 states and 24864 transitions. [2021-06-05 13:45:54,111 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 13:45:54,111 INFO L276 IsEmpty]: Start isEmpty. Operand 7950 states and 24864 transitions. [2021-06-05 13:45:54,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:54,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:54,120 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:54,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-06-05 13:45:54,320 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:54,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:54,321 INFO L82 PathProgramCache]: Analyzing trace with hash 521161979, now seen corresponding path program 311 times [2021-06-05 13:45:54,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:54,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690114589] [2021-06-05 13:45:54,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:54,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:54,445 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 13:45:54,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:54,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690114589] [2021-06-05 13:45:54,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690114589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:54,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688298944] [2021-06-05 13:45:54,446 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 13:45:54,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:45:54,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:54,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:54,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:54,629 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 13:45:54,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688298944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:54,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:54,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 13:45:54,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597078819] [2021-06-05 13:45:54,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:54,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:54,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:54,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:54,630 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 13:45:54,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:54,872 INFO L93 Difference]: Finished difference Result 8403 states and 25974 transitions. [2021-06-05 13:45:54,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:45:54,873 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 13:45:54,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:54,881 INFO L225 Difference]: With dead ends: 8403 [2021-06-05 13:45:54,881 INFO L226 Difference]: Without dead ends: 8393 [2021-06-05 13:45:54,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 276.9ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:54,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8393 states. [2021-06-05 13:45:54,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8393 to 8044. [2021-06-05 13:45:54,970 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 13:45:54,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8044 states to 8044 states and 25199 transitions. [2021-06-05 13:45:54,983 INFO L78 Accepts]: Start accepts. Automaton has 8044 states and 25199 transitions. Word has length 23 [2021-06-05 13:45:54,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:54,983 INFO L482 AbstractCegarLoop]: Abstraction has 8044 states and 25199 transitions. [2021-06-05 13:45:54,983 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 13:45:54,983 INFO L276 IsEmpty]: Start isEmpty. Operand 8044 states and 25199 transitions. [2021-06-05 13:45:54,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:54,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:54,992 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:55,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable568,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:55,193 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:55,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:55,193 INFO L82 PathProgramCache]: Analyzing trace with hash 2135864703, now seen corresponding path program 312 times [2021-06-05 13:45:55,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:55,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94652254] [2021-06-05 13:45:55,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:55,317 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 13:45:55,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:55,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94652254] [2021-06-05 13:45:55,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94652254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:55,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342714185] [2021-06-05 13:45:55,317 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 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 13:45:55,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:45:55,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:55,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:55,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:55,485 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 13:45:55,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342714185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:55,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:55,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-05 13:45:55,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139726087] [2021-06-05 13:45:55,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:45:55,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:55,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:45:55,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:55,486 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 13:45:55,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:55,711 INFO L93 Difference]: Finished difference Result 8384 states and 25924 transitions. [2021-06-05 13:45:55,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:45:55,711 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 13:45:55,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:55,721 INFO L225 Difference]: With dead ends: 8384 [2021-06-05 13:45:55,722 INFO L226 Difference]: Without dead ends: 8377 [2021-06-05 13:45:55,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 260.4ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:45:55,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8377 states. [2021-06-05 13:45:55,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8377 to 8041. [2021-06-05 13:45:55,817 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 13:45:55,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8041 states to 8041 states and 25187 transitions. [2021-06-05 13:45:55,831 INFO L78 Accepts]: Start accepts. Automaton has 8041 states and 25187 transitions. Word has length 23 [2021-06-05 13:45:55,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:55,831 INFO L482 AbstractCegarLoop]: Abstraction has 8041 states and 25187 transitions. [2021-06-05 13:45:55,831 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 13:45:55,831 INFO L276 IsEmpty]: Start isEmpty. Operand 8041 states and 25187 transitions. [2021-06-05 13:45:55,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:55,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:55,840 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:56,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:56,041 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:56,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:56,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1092616785, now seen corresponding path program 313 times [2021-06-05 13:45:56,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:56,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646324004] [2021-06-05 13:45:56,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:56,159 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 13:45:56,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:56,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646324004] [2021-06-05 13:45:56,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646324004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:56,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375594635] [2021-06-05 13:45:56,159 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 13:45:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:56,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:56,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:56,333 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 13:45:56,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375594635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:56,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:56,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 13:45:56,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261542398] [2021-06-05 13:45:56,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:56,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:56,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:56,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:56,334 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 13:45:56,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:56,576 INFO L93 Difference]: Finished difference Result 8323 states and 25762 transitions. [2021-06-05 13:45:56,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:45:56,576 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 13:45:56,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:56,587 INFO L225 Difference]: With dead ends: 8323 [2021-06-05 13:45:56,587 INFO L226 Difference]: Without dead ends: 8310 [2021-06-05 13:45:56,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 272.0ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:45:56,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8310 states. [2021-06-05 13:45:56,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8310 to 8045. [2021-06-05 13:45:56,679 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 13:45:56,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8045 states to 8045 states and 25192 transitions. [2021-06-05 13:45:56,692 INFO L78 Accepts]: Start accepts. Automaton has 8045 states and 25192 transitions. Word has length 23 [2021-06-05 13:45:56,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:56,692 INFO L482 AbstractCegarLoop]: Abstraction has 8045 states and 25192 transitions. [2021-06-05 13:45:56,692 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 13:45:56,692 INFO L276 IsEmpty]: Start isEmpty. Operand 8045 states and 25192 transitions. [2021-06-05 13:45:56,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:56,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:56,700 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:56,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-06-05 13:45:56,900 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:56,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:56,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1627846587, now seen corresponding path program 314 times [2021-06-05 13:45:56,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:56,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870813179] [2021-06-05 13:45:56,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:57,023 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 13:45:57,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:57,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870813179] [2021-06-05 13:45:57,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870813179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:57,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680845582] [2021-06-05 13:45:57,023 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 13:45:57,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:57,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:57,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:57,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:57,189 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 13:45:57,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680845582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:57,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:57,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 13:45:57,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760449104] [2021-06-05 13:45:57,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:57,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:57,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:57,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:57,190 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 13:45:57,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:57,453 INFO L93 Difference]: Finished difference Result 8231 states and 25513 transitions. [2021-06-05 13:45:57,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:45:57,453 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 13:45:57,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:57,463 INFO L225 Difference]: With dead ends: 8231 [2021-06-05 13:45:57,463 INFO L226 Difference]: Without dead ends: 8224 [2021-06-05 13:45:57,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 274.9ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:45:57,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8224 states. [2021-06-05 13:45:57,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8224 to 8043. [2021-06-05 13:45:57,578 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 13:45:57,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8043 states to 8043 states and 25186 transitions. [2021-06-05 13:45:57,592 INFO L78 Accepts]: Start accepts. Automaton has 8043 states and 25186 transitions. Word has length 23 [2021-06-05 13:45:57,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:57,592 INFO L482 AbstractCegarLoop]: Abstraction has 8043 states and 25186 transitions. [2021-06-05 13:45:57,593 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 13:45:57,593 INFO L276 IsEmpty]: Start isEmpty. Operand 8043 states and 25186 transitions. [2021-06-05 13:45:57,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:57,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:57,602 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:57,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:57,802 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:57,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:57,803 INFO L82 PathProgramCache]: Analyzing trace with hash -108653125, now seen corresponding path program 315 times [2021-06-05 13:45:57,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:57,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539583023] [2021-06-05 13:45:57,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:57,926 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 13:45:57,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:57,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539583023] [2021-06-05 13:45:57,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539583023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:57,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450952579] [2021-06-05 13:45:57,926 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 13:45:57,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:45:57,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:57,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:57,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:58,091 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 13:45:58,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450952579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:58,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:58,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 13:45:58,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199696784] [2021-06-05 13:45:58,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:58,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:58,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:58,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:58,092 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 13:45:58,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:58,313 INFO L93 Difference]: Finished difference Result 8179 states and 25417 transitions. [2021-06-05 13:45:58,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:45:58,313 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 13:45:58,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:58,322 INFO L225 Difference]: With dead ends: 8179 [2021-06-05 13:45:58,323 INFO L226 Difference]: Without dead ends: 8163 [2021-06-05 13:45:58,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 273.5ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:45:58,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8163 states. [2021-06-05 13:45:58,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8163 to 8022. [2021-06-05 13:45:58,406 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 13:45:58,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8022 states to 8022 states and 25123 transitions. [2021-06-05 13:45:58,420 INFO L78 Accepts]: Start accepts. Automaton has 8022 states and 25123 transitions. Word has length 23 [2021-06-05 13:45:58,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:58,420 INFO L482 AbstractCegarLoop]: Abstraction has 8022 states and 25123 transitions. [2021-06-05 13:45:58,420 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 13:45:58,420 INFO L276 IsEmpty]: Start isEmpty. Operand 8022 states and 25123 transitions. [2021-06-05 13:45:58,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:58,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:58,429 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:58,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,319 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:58,630 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:58,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:58,630 INFO L82 PathProgramCache]: Analyzing trace with hash -329539453, now seen corresponding path program 316 times [2021-06-05 13:45:58,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:58,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787431712] [2021-06-05 13:45:58,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:58,755 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 13:45:58,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:58,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787431712] [2021-06-05 13:45:58,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787431712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:58,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003133055] [2021-06-05 13:45:58,755 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 13:45:58,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:58,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:58,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:58,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:58,907 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 13:45:58,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003133055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:58,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:58,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-05 13:45:58,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677474816] [2021-06-05 13:45:58,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:45:58,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:58,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:45:58,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:45:58,908 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 13:45:59,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:59,136 INFO L93 Difference]: Finished difference Result 8489 states and 26222 transitions. [2021-06-05 13:45:59,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:45:59,137 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 13:45:59,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:59,147 INFO L225 Difference]: With dead ends: 8489 [2021-06-05 13:45:59,148 INFO L226 Difference]: Without dead ends: 8479 [2021-06-05 13:45:59,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 245.7ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:59,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8479 states. [2021-06-05 13:45:59,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8479 to 8124. [2021-06-05 13:45:59,248 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 13:45:59,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8124 states to 8124 states and 25481 transitions. [2021-06-05 13:45:59,263 INFO L78 Accepts]: Start accepts. Automaton has 8124 states and 25481 transitions. Word has length 23 [2021-06-05 13:45:59,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:59,263 INFO L482 AbstractCegarLoop]: Abstraction has 8124 states and 25481 transitions. [2021-06-05 13:45:59,263 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 13:45:59,263 INFO L276 IsEmpty]: Start isEmpty. Operand 8124 states and 25481 transitions. [2021-06-05 13:45:59,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:59,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:59,272 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:59,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:59,472 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:59,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:59,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1285163271, now seen corresponding path program 317 times [2021-06-05 13:45:59,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:59,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002965505] [2021-06-05 13:45:59,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:59,598 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 13:45:59,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:59,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002965505] [2021-06-05 13:45:59,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002965505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:59,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950850537] [2021-06-05 13:45:59,598 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 13:45:59,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:45:59,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:59,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:45:59,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:59,757 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 13:45:59,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950850537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:59,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:59,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-06-05 13:45:59,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297228373] [2021-06-05 13:45:59,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:45:59,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:59,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:45:59,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:59,758 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 13:45:59,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:59,994 INFO L93 Difference]: Finished difference Result 8470 states and 26170 transitions. [2021-06-05 13:45:59,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:45:59,994 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 13:45:59,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:00,006 INFO L225 Difference]: With dead ends: 8470 [2021-06-05 13:46:00,006 INFO L226 Difference]: Without dead ends: 8463 [2021-06-05 13:46:00,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 258.1ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:46:00,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8463 states. [2021-06-05 13:46:00,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8463 to 8120. [2021-06-05 13:46:00,103 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 13:46:00,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8120 states to 8120 states and 25465 transitions. [2021-06-05 13:46:00,117 INFO L78 Accepts]: Start accepts. Automaton has 8120 states and 25465 transitions. Word has length 23 [2021-06-05 13:46:00,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:00,117 INFO L482 AbstractCegarLoop]: Abstraction has 8120 states and 25465 transitions. [2021-06-05 13:46:00,117 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 13:46:00,117 INFO L276 IsEmpty]: Start isEmpty. Operand 8120 states and 25465 transitions. [2021-06-05 13:46:00,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:46:00,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:00,161 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:00,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-06-05 13:46:00,362 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:00,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:00,362 INFO L82 PathProgramCache]: Analyzing trace with hash 241915353, now seen corresponding path program 318 times [2021-06-05 13:46:00,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:00,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847335605] [2021-06-05 13:46:00,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:00,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:00,478 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 13:46:00,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:00,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847335605] [2021-06-05 13:46:00,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847335605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:00,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139716778] [2021-06-05 13:46:00,478 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 13:46:00,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:46:00,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:00,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:46:00,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:00,630 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 13:46:00,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139716778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:00,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:00,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-05 13:46:00,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812567178] [2021-06-05 13:46:00,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:46:00,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:00,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:46:00,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:46:00,630 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 13:46:00,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:00,885 INFO L93 Difference]: Finished difference Result 8466 states and 26134 transitions. [2021-06-05 13:46:00,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:46:00,886 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 13:46:00,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:00,895 INFO L225 Difference]: With dead ends: 8466 [2021-06-05 13:46:00,895 INFO L226 Difference]: Without dead ends: 8453 [2021-06-05 13:46:00,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 253.8ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:46:00,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8453 states. [2021-06-05 13:46:00,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8453 to 8117. [2021-06-05 13:46:00,979 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 13:46:00,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8117 states to 8117 states and 25451 transitions. [2021-06-05 13:46:00,994 INFO L78 Accepts]: Start accepts. Automaton has 8117 states and 25451 transitions. Word has length 23 [2021-06-05 13:46:00,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:00,994 INFO L482 AbstractCegarLoop]: Abstraction has 8117 states and 25451 transitions. [2021-06-05 13:46:00,994 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 13:46:00,994 INFO L276 IsEmpty]: Start isEmpty. Operand 8117 states and 25451 transitions. [2021-06-05 13:46:01,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:46:01,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:01,003 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:01,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-06-05 13:46:01,204 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:01,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:01,204 INFO L82 PathProgramCache]: Analyzing trace with hash 777145155, now seen corresponding path program 319 times [2021-06-05 13:46:01,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:01,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718619852] [2021-06-05 13:46:01,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:01,328 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 13:46:01,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:01,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718619852] [2021-06-05 13:46:01,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718619852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:01,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132153450] [2021-06-05 13:46:01,328 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 13:46:01,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:01,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:46:01,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:01,471 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 13:46:01,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132153450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:01,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:01,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-05 13:46:01,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991908203] [2021-06-05 13:46:01,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:46:01,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:01,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:46:01,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:46:01,472 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 13:46:01,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:01,794 INFO L93 Difference]: Finished difference Result 8405 states and 25973 transitions. [2021-06-05 13:46:01,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:46:01,794 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 13:46:01,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:01,805 INFO L225 Difference]: With dead ends: 8405 [2021-06-05 13:46:01,805 INFO L226 Difference]: Without dead ends: 8389 [2021-06-05 13:46:01,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 267.0ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:46:01,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8389 states. [2021-06-05 13:46:01,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8389 to 8120. [2021-06-05 13:46:01,905 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 13:46:01,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8120 states to 8120 states and 25451 transitions. [2021-06-05 13:46:01,920 INFO L78 Accepts]: Start accepts. Automaton has 8120 states and 25451 transitions. Word has length 23 [2021-06-05 13:46:01,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:01,920 INFO L482 AbstractCegarLoop]: Abstraction has 8120 states and 25451 transitions. [2021-06-05 13:46:01,920 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 13:46:01,920 INFO L276 IsEmpty]: Start isEmpty. Operand 8120 states and 25451 transitions. [2021-06-05 13:46:01,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:46:01,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:01,929 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:02,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:02,130 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:02,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:02,130 INFO L82 PathProgramCache]: Analyzing trace with hash 189399833, now seen corresponding path program 320 times [2021-06-05 13:46:02,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:02,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561679947] [2021-06-05 13:46:02,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:02,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:02,254 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 13:46:02,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:02,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561679947] [2021-06-05 13:46:02,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561679947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:02,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211042496] [2021-06-05 13:46:02,254 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 13:46:02,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:02,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:02,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:46:02,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:02,408 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 13:46:02,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211042496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:02,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:02,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-05 13:46:02,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778696963] [2021-06-05 13:46:02,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:46:02,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:02,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:46:02,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:46:02,409 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 13:46:02,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:02,707 INFO L93 Difference]: Finished difference Result 8334 states and 25817 transitions. [2021-06-05 13:46:02,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:46:02,707 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 13:46:02,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:02,717 INFO L225 Difference]: With dead ends: 8334 [2021-06-05 13:46:02,717 INFO L226 Difference]: Without dead ends: 8327 [2021-06-05 13:46:02,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 278.7ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:46:02,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8327 states. [2021-06-05 13:46:02,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8327 to 8117. [2021-06-05 13:46:02,801 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 13:46:02,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8117 states to 8117 states and 25442 transitions. [2021-06-05 13:46:02,814 INFO L78 Accepts]: Start accepts. Automaton has 8117 states and 25442 transitions. Word has length 23 [2021-06-05 13:46:02,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:02,814 INFO L482 AbstractCegarLoop]: Abstraction has 8117 states and 25442 transitions. [2021-06-05 13:46:02,814 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 13:46:02,814 INFO L276 IsEmpty]: Start isEmpty. Operand 8117 states and 25442 transitions. [2021-06-05 13:46:02,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:46:02,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:02,823 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:03,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-06-05 13:46:03,023 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:03,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:03,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1894430651, now seen corresponding path program 321 times [2021-06-05 13:46:03,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:03,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627932482] [2021-06-05 13:46:03,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:03,199 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 13:46:03,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:03,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627932482] [2021-06-05 13:46:03,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627932482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:03,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557448650] [2021-06-05 13:46:03,199 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 13:46:03,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:46:03,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:03,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:46:03,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:03,363 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 13:46:03,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557448650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:03,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:03,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 13:46:03,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163521304] [2021-06-05 13:46:03,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:46:03,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:03,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:46:03,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:46:03,364 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 13:46:03,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:03,628 INFO L93 Difference]: Finished difference Result 8376 states and 25895 transitions. [2021-06-05 13:46:03,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:46:03,628 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 13:46:03,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:03,638 INFO L225 Difference]: With dead ends: 8376 [2021-06-05 13:46:03,638 INFO L226 Difference]: Without dead ends: 8360 [2021-06-05 13:46:03,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 332.1ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:46:03,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8360 states. [2021-06-05 13:46:03,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8360 to 8101. [2021-06-05 13:46:03,719 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 13:46:03,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8101 states to 8101 states and 25385 transitions. [2021-06-05 13:46:03,732 INFO L78 Accepts]: Start accepts. Automaton has 8101 states and 25385 transitions. Word has length 23 [2021-06-05 13:46:03,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:03,732 INFO L482 AbstractCegarLoop]: Abstraction has 8101 states and 25385 transitions. [2021-06-05 13:46:03,732 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 13:46:03,732 INFO L276 IsEmpty]: Start isEmpty. Operand 8101 states and 25385 transitions. [2021-06-05 13:46:03,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:46:03,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:03,741 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:03,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 13:46:03,941 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:03,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:03,941 INFO L82 PathProgramCache]: Analyzing trace with hash -2102483687, now seen corresponding path program 322 times [2021-06-05 13:46:03,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:03,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124004481] [2021-06-05 13:46:03,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:04,063 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 13:46:04,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:04,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124004481] [2021-06-05 13:46:04,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124004481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:04,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204764125] [2021-06-05 13:46:04,063 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 13:46:04,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:04,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:04,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:46:04,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:04,211 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 13:46:04,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204764125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:04,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:04,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-05 13:46:04,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601505251] [2021-06-05 13:46:04,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:46:04,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:04,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:46:04,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:46:04,212 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 13:46:04,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:04,489 INFO L93 Difference]: Finished difference Result 8270 states and 25679 transitions. [2021-06-05 13:46:04,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:46:04,489 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 13:46:04,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:04,498 INFO L225 Difference]: With dead ends: 8270 [2021-06-05 13:46:04,498 INFO L226 Difference]: Without dead ends: 8251 [2021-06-05 13:46:04,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 271.1ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:46:04,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2021-06-05 13:46:04,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 8085. [2021-06-05 13:46:04,594 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 13:46:04,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8085 states to 8085 states and 25337 transitions. [2021-06-05 13:46:04,609 INFO L78 Accepts]: Start accepts. Automaton has 8085 states and 25337 transitions. Word has length 23 [2021-06-05 13:46:04,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:04,609 INFO L482 AbstractCegarLoop]: Abstraction has 8085 states and 25337 transitions. [2021-06-05 13:46:04,609 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 13:46:04,609 INFO L276 IsEmpty]: Start isEmpty. Operand 8085 states and 25337 transitions. [2021-06-05 13:46:04,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:46:04,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:04,618 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:04,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-05 13:46:04,819 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:04,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:04,819 INFO L82 PathProgramCache]: Analyzing trace with hash -931480069, now seen corresponding path program 323 times [2021-06-05 13:46:04,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:04,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984042337] [2021-06-05 13:46:04,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:04,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:04,955 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 13:46:04,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:04,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984042337] [2021-06-05 13:46:04,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984042337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:04,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95998476] [2021-06-05 13:46:04,955 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 13:46:05,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:46:05,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:05,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:46:05,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:05,213 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 13:46:05,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95998476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:05,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:05,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-05 13:46:05,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739906573] [2021-06-05 13:46:05,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:46:05,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:05,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:46:05,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:46:05,214 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 13:46:05,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:05,488 INFO L93 Difference]: Finished difference Result 8595 states and 26485 transitions. [2021-06-05 13:46:05,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:46:05,489 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 13:46:05,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:05,502 INFO L225 Difference]: With dead ends: 8595 [2021-06-05 13:46:05,502 INFO L226 Difference]: Without dead ends: 8585 [2021-06-05 13:46:05,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 264.0ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:46:05,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8585 states. [2021-06-05 13:46:05,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8585 to 8181. [2021-06-05 13:46:05,606 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 13:46:05,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8181 states to 8181 states and 25672 transitions. [2021-06-05 13:46:05,621 INFO L78 Accepts]: Start accepts. Automaton has 8181 states and 25672 transitions. Word has length 23 [2021-06-05 13:46:05,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:05,621 INFO L482 AbstractCegarLoop]: Abstraction has 8181 states and 25672 transitions. [2021-06-05 13:46:05,621 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 13:46:05,621 INFO L276 IsEmpty]: Start isEmpty. Operand 8181 states and 25672 transitions. [2021-06-05 13:46:05,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:46:05,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:05,629 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:05,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable604,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:05,844 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:05,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:05,845 INFO L82 PathProgramCache]: Analyzing trace with hash 683222655, now seen corresponding path program 324 times [2021-06-05 13:46:05,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:05,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851349500] [2021-06-05 13:46:05,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:05,981 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 13:46:05,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:05,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851349500] [2021-06-05 13:46:05,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851349500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:05,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122953466] [2021-06-05 13:46:05,981 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 13:46:06,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:46:06,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:06,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:46:06,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:06,220 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 13:46:06,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122953466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:06,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:06,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2021-06-05 13:46:06,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155728342] [2021-06-05 13:46:06,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:46:06,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:06,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:46:06,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:06,221 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 13:46:06,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:06,486 INFO L93 Difference]: Finished difference Result 8579 states and 26445 transitions. [2021-06-05 13:46:06,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:46:06,486 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 13:46:06,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:06,498 INFO L225 Difference]: With dead ends: 8579 [2021-06-05 13:46:06,498 INFO L226 Difference]: Without dead ends: 8572 [2021-06-05 13:46:06,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 270.9ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:46:06,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8572 states. [2021-06-05 13:46:06,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8572 to 8170. [2021-06-05 13:46:06,608 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 13:46:06,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8170 states to 8170 states and 25635 transitions. [2021-06-05 13:46:06,623 INFO L78 Accepts]: Start accepts. Automaton has 8170 states and 25635 transitions. Word has length 23 [2021-06-05 13:46:06,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:06,623 INFO L482 AbstractCegarLoop]: Abstraction has 8170 states and 25635 transitions. [2021-06-05 13:46:06,623 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 13:46:06,623 INFO L276 IsEmpty]: Start isEmpty. Operand 8170 states and 25635 transitions. [2021-06-05 13:46:06,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:46:06,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:06,632 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:06,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:06,847 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:06,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:06,848 INFO L82 PathProgramCache]: Analyzing trace with hash -360025263, now seen corresponding path program 325 times [2021-06-05 13:46:06,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:06,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217279882] [2021-06-05 13:46:06,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:06,979 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 13:46:06,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:06,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217279882] [2021-06-05 13:46:06,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217279882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:06,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021466835] [2021-06-05 13:46:06,980 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 13:46:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:07,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:46:07,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:07,139 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 13:46:07,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021466835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:07,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:07,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-05 13:46:07,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275341784] [2021-06-05 13:46:07,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:46:07,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:07,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:46:07,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:46:07,140 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 13:46:07,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:07,425 INFO L93 Difference]: Finished difference Result 8583 states and 26428 transitions. [2021-06-05 13:46:07,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:46:07,425 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 13:46:07,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:07,437 INFO L225 Difference]: With dead ends: 8583 [2021-06-05 13:46:07,438 INFO L226 Difference]: Without dead ends: 8570 [2021-06-05 13:46:07,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 277.9ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:46:07,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8570 states. [2021-06-05 13:46:07,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8570 to 8166. [2021-06-05 13:46:07,534 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 13:46:07,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8166 states to 8166 states and 25618 transitions. [2021-06-05 13:46:07,548 INFO L78 Accepts]: Start accepts. Automaton has 8166 states and 25618 transitions. Word has length 23 [2021-06-05 13:46:07,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:07,549 INFO L482 AbstractCegarLoop]: Abstraction has 8166 states and 25618 transitions. [2021-06-05 13:46:07,549 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 13:46:07,549 INFO L276 IsEmpty]: Start isEmpty. Operand 8166 states and 25618 transitions. [2021-06-05 13:46:07,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:46:07,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:07,557 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:07,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable610 [2021-06-05 13:46:07,758 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:07,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:07,758 INFO L82 PathProgramCache]: Analyzing trace with hash 175204539, now seen corresponding path program 326 times [2021-06-05 13:46:07,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:07,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296721916] [2021-06-05 13:46:07,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:07,895 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 13:46:07,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:07,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296721916] [2021-06-05 13:46:07,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296721916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:07,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805131618] [2021-06-05 13:46:07,895 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 13:46:07,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:07,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:07,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:46:07,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:08,048 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 13:46:08,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805131618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:08,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:08,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-05 13:46:08,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262508430] [2021-06-05 13:46:08,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:46:08,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:08,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:46:08,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:46:08,049 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 13:46:08,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:08,375 INFO L93 Difference]: Finished difference Result 8591 states and 26411 transitions. [2021-06-05 13:46:08,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:46:08,375 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 13:46:08,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:08,387 INFO L225 Difference]: With dead ends: 8591 [2021-06-05 13:46:08,387 INFO L226 Difference]: Without dead ends: 8575 [2021-06-05 13:46:08,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 287.6ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:46:08,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8575 states. [2021-06-05 13:46:08,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8575 to 8162. [2021-06-05 13:46:08,493 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 13:46:08,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8162 states to 8162 states and 25602 transitions. [2021-06-05 13:46:08,508 INFO L78 Accepts]: Start accepts. Automaton has 8162 states and 25602 transitions. Word has length 23 [2021-06-05 13:46:08,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:08,508 INFO L482 AbstractCegarLoop]: Abstraction has 8162 states and 25602 transitions. [2021-06-05 13:46:08,508 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 13:46:08,508 INFO L276 IsEmpty]: Start isEmpty. Operand 8162 states and 25602 transitions. [2021-06-05 13:46:08,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:46:08,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:08,517 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:08,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-06-05 13:46:08,718 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:08,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:08,718 INFO L82 PathProgramCache]: Analyzing trace with hash -412540783, now seen corresponding path program 327 times [2021-06-05 13:46:08,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:08,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116522185] [2021-06-05 13:46:08,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:08,850 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 13:46:08,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:08,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116522185] [2021-06-05 13:46:08,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116522185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:08,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438868269] [2021-06-05 13:46:08,851 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 13:46:08,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:46:08,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:08,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:46:08,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:09,000 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 13:46:09,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438868269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:09,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:09,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-05 13:46:09,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623671108] [2021-06-05 13:46:09,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:46:09,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:09,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:46:09,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:46:09,001 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 13:46:09,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:09,358 INFO L93 Difference]: Finished difference Result 8522 states and 26260 transitions. [2021-06-05 13:46:09,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:46:09,359 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 13:46:09,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:09,369 INFO L225 Difference]: With dead ends: 8522 [2021-06-05 13:46:09,369 INFO L226 Difference]: Without dead ends: 8503 [2021-06-05 13:46:09,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 293.7ms TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:46:09,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8503 states. [2021-06-05 13:46:09,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8503 to 8158. [2021-06-05 13:46:09,460 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 13:46:09,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8158 states to 8158 states and 25587 transitions. [2021-06-05 13:46:09,475 INFO L78 Accepts]: Start accepts. Automaton has 8158 states and 25587 transitions. Word has length 23 [2021-06-05 13:46:09,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:09,475 INFO L482 AbstractCegarLoop]: Abstraction has 8158 states and 25587 transitions. [2021-06-05 13:46:09,475 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 13:46:09,475 INFO L276 IsEmpty]: Start isEmpty. Operand 8158 states and 25587 transitions. [2021-06-05 13:46:09,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:46:09,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:09,485 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:09,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable616 [2021-06-05 13:46:09,685 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:09,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:09,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1452776581, now seen corresponding path program 328 times [2021-06-05 13:46:09,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:09,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084786159] [2021-06-05 13:46:09,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:09,812 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 13:46:09,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:09,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084786159] [2021-06-05 13:46:09,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084786159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:09,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146557808] [2021-06-05 13:46:09,812 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 13:46:09,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:09,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:09,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 13:46:09,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:09,948 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 13:46:09,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146557808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:09,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:09,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-05 13:46:09,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969979478] [2021-06-05 13:46:09,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:46:09,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:09,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:46:09,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:46:09,949 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 13:46:10,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:10,281 INFO L93 Difference]: Finished difference Result 8435 states and 26072 transitions. [2021-06-05 13:46:10,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:46:10,282 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 13:46:10,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:10,293 INFO L225 Difference]: With dead ends: 8435 [2021-06-05 13:46:10,294 INFO L226 Difference]: Without dead ends: 8428 [2021-06-05 13:46:10,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 277.1ms TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:46:10,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8428 states. [2021-06-05 13:46:10,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8428 to 8154. [2021-06-05 13:46:10,394 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 13:46:10,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8154 states to 8154 states and 25575 transitions. [2021-06-05 13:46:10,409 INFO L78 Accepts]: Start accepts. Automaton has 8154 states and 25575 transitions. Word has length 23 [2021-06-05 13:46:10,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:10,409 INFO L482 AbstractCegarLoop]: Abstraction has 8154 states and 25575 transitions. [2021-06-05 13:46:10,410 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 13:46:10,410 INFO L276 IsEmpty]: Start isEmpty. Operand 8154 states and 25575 transitions. [2021-06-05 13:46:10,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:10,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:10,419 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:10,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:10,620 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:10,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:10,620 INFO L82 PathProgramCache]: Analyzing trace with hash 835429403, now seen corresponding path program 329 times [2021-06-05 13:46:10,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:10,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201126836] [2021-06-05 13:46:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:10,679 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 13:46:10,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:10,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201126836] [2021-06-05 13:46:10,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201126836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:10,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333491963] [2021-06-05 13:46:10,679 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 13:46:10,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:46:10,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:10,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:10,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:10,792 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 13:46:10,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333491963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:10,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:10,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-05 13:46:10,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327032082] [2021-06-05 13:46:10,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:46:10,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:10,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:46:10,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:10,793 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 13:46:10,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:10,944 INFO L93 Difference]: Finished difference Result 11007 states and 33833 transitions. [2021-06-05 13:46:10,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:46:10,945 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 13:46:10,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:10,958 INFO L225 Difference]: With dead ends: 11007 [2021-06-05 13:46:10,959 INFO L226 Difference]: Without dead ends: 10984 [2021-06-05 13:46:10,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 187.6ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:46:10,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10984 states. [2021-06-05 13:46:11,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10984 to 8149. [2021-06-05 13:46:11,080 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 13:46:11,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8149 states to 8149 states and 25565 transitions. [2021-06-05 13:46:11,095 INFO L78 Accepts]: Start accepts. Automaton has 8149 states and 25565 transitions. Word has length 24 [2021-06-05 13:46:11,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:11,095 INFO L482 AbstractCegarLoop]: Abstraction has 8149 states and 25565 transitions. [2021-06-05 13:46:11,095 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 13:46:11,095 INFO L276 IsEmpty]: Start isEmpty. Operand 8149 states and 25565 transitions. [2021-06-05 13:46:11,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:11,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:11,105 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:11,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2021-06-05 13:46:11,305 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:11,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:11,305 INFO L82 PathProgramCache]: Analyzing trace with hash 2031355403, now seen corresponding path program 330 times [2021-06-05 13:46:11,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:11,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494367690] [2021-06-05 13:46:11,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:11,370 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 13:46:11,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:11,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494367690] [2021-06-05 13:46:11,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494367690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:11,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080787129] [2021-06-05 13:46:11,371 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 13:46:11,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:46:11,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:11,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:11,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:11,476 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 13:46:11,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080787129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:11,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:11,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-05 13:46:11,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138922296] [2021-06-05 13:46:11,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:46:11,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:11,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:46:11,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:11,477 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 13:46:11,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:11,632 INFO L93 Difference]: Finished difference Result 11150 states and 34266 transitions. [2021-06-05 13:46:11,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:46:11,633 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 13:46:11,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:11,647 INFO L225 Difference]: With dead ends: 11150 [2021-06-05 13:46:11,647 INFO L226 Difference]: Without dead ends: 11150 [2021-06-05 13:46:11,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 140.9ms TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:46:11,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11150 states. [2021-06-05 13:46:11,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11150 to 8243. [2021-06-05 13:46:11,791 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 13:46:11,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8243 states to 8243 states and 25847 transitions. [2021-06-05 13:46:11,806 INFO L78 Accepts]: Start accepts. Automaton has 8243 states and 25847 transitions. Word has length 24 [2021-06-05 13:46:11,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:11,806 INFO L482 AbstractCegarLoop]: Abstraction has 8243 states and 25847 transitions. [2021-06-05 13:46:11,806 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 13:46:11,806 INFO L276 IsEmpty]: Start isEmpty. Operand 8243 states and 25847 transitions. [2021-06-05 13:46:11,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:11,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:11,815 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:12,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable623,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:12,015 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:12,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:12,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1049828081, now seen corresponding path program 331 times [2021-06-05 13:46:12,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:12,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188019938] [2021-06-05 13:46:12,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:12,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:12,074 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 13:46:12,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:12,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188019938] [2021-06-05 13:46:12,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188019938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:12,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848714115] [2021-06-05 13:46:12,074 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 13:46:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:12,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:12,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:12,197 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 13:46:12,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848714115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:12,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:12,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 13:46:12,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719977030] [2021-06-05 13:46:12,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:46:12,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:12,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:46:12,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:12,198 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 13:46:12,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:12,891 INFO L93 Difference]: Finished difference Result 12726 states and 38747 transitions. [2021-06-05 13:46:12,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 13:46:12,891 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 13:46:12,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:12,908 INFO L225 Difference]: With dead ends: 12726 [2021-06-05 13:46:12,908 INFO L226 Difference]: Without dead ends: 12716 [2021-06-05 13:46:12,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 560.4ms TimeCoverageRelationStatistics Valid=1502, Invalid=3190, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 13:46:12,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12716 states. [2021-06-05 13:46:13,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12716 to 9550. [2021-06-05 13:46:13,061 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 13:46:13,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9550 states to 9550 states and 30208 transitions. [2021-06-05 13:46:13,078 INFO L78 Accepts]: Start accepts. Automaton has 9550 states and 30208 transitions. Word has length 24 [2021-06-05 13:46:13,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:13,078 INFO L482 AbstractCegarLoop]: Abstraction has 9550 states and 30208 transitions. [2021-06-05 13:46:13,078 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 13:46:13,079 INFO L276 IsEmpty]: Start isEmpty. Operand 9550 states and 30208 transitions. [2021-06-05 13:46:13,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:13,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:13,089 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:13,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-06-05 13:46:13,290 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:13,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:13,290 INFO L82 PathProgramCache]: Analyzing trace with hash -478373275, now seen corresponding path program 332 times [2021-06-05 13:46:13,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:13,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347062815] [2021-06-05 13:46:13,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:13,348 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 13:46:13,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:13,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347062815] [2021-06-05 13:46:13,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347062815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:13,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606828263] [2021-06-05 13:46:13,348 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 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 13:46:13,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:13,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:13,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:13,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:13,490 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 13:46:13,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606828263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:13,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:13,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 13:46:13,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122789074] [2021-06-05 13:46:13,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:46:13,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:13,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:46:13,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:13,491 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 13:46:14,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:14,195 INFO L93 Difference]: Finished difference Result 12601 states and 38222 transitions. [2021-06-05 13:46:14,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 13:46:14,195 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 13:46:14,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:14,211 INFO L225 Difference]: With dead ends: 12601 [2021-06-05 13:46:14,212 INFO L226 Difference]: Without dead ends: 12595 [2021-06-05 13:46:14,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 582.9ms TimeCoverageRelationStatistics Valid=1386, Invalid=4314, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 13:46:14,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12595 states. [2021-06-05 13:46:14,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12595 to 9022. [2021-06-05 13:46:14,400 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 13:46:14,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9022 states to 9022 states and 28285 transitions. [2021-06-05 13:46:14,417 INFO L78 Accepts]: Start accepts. Automaton has 9022 states and 28285 transitions. Word has length 24 [2021-06-05 13:46:14,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:14,417 INFO L482 AbstractCegarLoop]: Abstraction has 9022 states and 28285 transitions. [2021-06-05 13:46:14,417 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 13:46:14,417 INFO L276 IsEmpty]: Start isEmpty. Operand 9022 states and 28285 transitions. [2021-06-05 13:46:14,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:14,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:14,427 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:14,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:14,628 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:14,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:14,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1885022475, now seen corresponding path program 333 times [2021-06-05 13:46:14,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:14,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120315621] [2021-06-05 13:46:14,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:14,687 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 13:46:14,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:14,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120315621] [2021-06-05 13:46:14,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120315621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:14,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633235133] [2021-06-05 13:46:14,687 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 13:46:14,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:46:14,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:14,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:14,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:14,805 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 13:46:14,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633235133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:14,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:14,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 13:46:14,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438750999] [2021-06-05 13:46:14,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:46:14,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:14,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:46:14,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:14,806 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 13:46:15,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:15,619 INFO L93 Difference]: Finished difference Result 11076 states and 33757 transitions. [2021-06-05 13:46:15,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 13:46:15,619 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 13:46:15,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:15,634 INFO L225 Difference]: With dead ends: 11076 [2021-06-05 13:46:15,634 INFO L226 Difference]: Without dead ends: 11076 [2021-06-05 13:46:15,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 667.8ms TimeCoverageRelationStatistics Valid=2135, Invalid=3871, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 13:46:15,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11076 states. [2021-06-05 13:46:15,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11076 to 9541. [2021-06-05 13:46:15,768 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 13:46:15,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9541 states to 9541 states and 30068 transitions. [2021-06-05 13:46:15,785 INFO L78 Accepts]: Start accepts. Automaton has 9541 states and 30068 transitions. Word has length 24 [2021-06-05 13:46:15,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:15,785 INFO L482 AbstractCegarLoop]: Abstraction has 9541 states and 30068 transitions. [2021-06-05 13:46:15,785 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 13:46:15,785 INFO L276 IsEmpty]: Start isEmpty. Operand 9541 states and 30068 transitions. [2021-06-05 13:46:15,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:15,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:15,796 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:15,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:15,996 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:15,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:15,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1420431371, now seen corresponding path program 334 times [2021-06-05 13:46:15,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:15,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889467901] [2021-06-05 13:46:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:15,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:16,055 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 13:46:16,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:16,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889467901] [2021-06-05 13:46:16,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889467901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:16,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111996441] [2021-06-05 13:46:16,055 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 13:46:16,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:16,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:16,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:16,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:16,180 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 13:46:16,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111996441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:16,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:16,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 13:46:16,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399920638] [2021-06-05 13:46:16,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:46:16,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:16,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:46:16,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:16,181 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 13:46:16,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:16,977 INFO L93 Difference]: Finished difference Result 10620 states and 32666 transitions. [2021-06-05 13:46:16,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 13:46:16,977 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 13:46:16,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:16,991 INFO L225 Difference]: With dead ends: 10620 [2021-06-05 13:46:16,991 INFO L226 Difference]: Without dead ends: 10616 [2021-06-05 13:46:16,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1908 ImplicationChecksByTransitivity, 678.5ms TimeCoverageRelationStatistics Valid=2587, Invalid=4895, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 13:46:16,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10616 states. [2021-06-05 13:46:17,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10616 to 8587. [2021-06-05 13:46:17,114 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 13:46:17,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8587 states to 8587 states and 26771 transitions. [2021-06-05 13:46:17,178 INFO L78 Accepts]: Start accepts. Automaton has 8587 states and 26771 transitions. Word has length 24 [2021-06-05 13:46:17,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:17,178 INFO L482 AbstractCegarLoop]: Abstraction has 8587 states and 26771 transitions. [2021-06-05 13:46:17,178 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 13:46:17,178 INFO L276 IsEmpty]: Start isEmpty. Operand 8587 states and 26771 transitions. [2021-06-05 13:46:17,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:17,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:17,186 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:17,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable627 [2021-06-05 13:46:17,387 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:17,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:17,387 INFO L82 PathProgramCache]: Analyzing trace with hash 56856527, now seen corresponding path program 335 times [2021-06-05 13:46:17,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:17,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090108085] [2021-06-05 13:46:17,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:17,444 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 13:46:17,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:17,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090108085] [2021-06-05 13:46:17,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090108085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:17,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195407360] [2021-06-05 13:46:17,444 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 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 13:46:17,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:46:17,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:17,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:17,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:17,566 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 13:46:17,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195407360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:17,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:17,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 13:46:17,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502976172] [2021-06-05 13:46:17,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:46:17,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:17,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:46:17,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:17,567 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 13:46:18,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:18,209 INFO L93 Difference]: Finished difference Result 11811 states and 35428 transitions. [2021-06-05 13:46:18,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 13:46:18,210 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 13:46:18,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:18,225 INFO L225 Difference]: With dead ends: 11811 [2021-06-05 13:46:18,225 INFO L226 Difference]: Without dead ends: 11802 [2021-06-05 13:46:18,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 526.2ms TimeCoverageRelationStatistics Valid=1185, Invalid=3927, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 13:46:18,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11802 states. [2021-06-05 13:46:18,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11802 to 8719. [2021-06-05 13:46:18,355 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 13:46:18,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8719 states to 8719 states and 27185 transitions. [2021-06-05 13:46:18,371 INFO L78 Accepts]: Start accepts. Automaton has 8719 states and 27185 transitions. Word has length 24 [2021-06-05 13:46:18,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:18,371 INFO L482 AbstractCegarLoop]: Abstraction has 8719 states and 27185 transitions. [2021-06-05 13:46:18,371 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 13:46:18,371 INFO L276 IsEmpty]: Start isEmpty. Operand 8719 states and 27185 transitions. [2021-06-05 13:46:18,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:18,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:18,382 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:18,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable628,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:18,582 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:18,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:18,582 INFO L82 PathProgramCache]: Analyzing trace with hash -530888795, now seen corresponding path program 336 times [2021-06-05 13:46:18,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:18,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037905367] [2021-06-05 13:46:18,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:18,639 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 13:46:18,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:18,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037905367] [2021-06-05 13:46:18,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037905367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:18,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980187637] [2021-06-05 13:46:18,639 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 13:46:18,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:46:18,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:18,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:18,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:18,778 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 13:46:18,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980187637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:18,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:18,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 13:46:18,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848676164] [2021-06-05 13:46:18,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:46:18,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:18,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:46:18,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:18,779 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 13:46:19,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:19,375 INFO L93 Difference]: Finished difference Result 11970 states and 35970 transitions. [2021-06-05 13:46:19,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 13:46:19,376 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 13:46:19,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:19,390 INFO L225 Difference]: With dead ends: 11970 [2021-06-05 13:46:19,390 INFO L226 Difference]: Without dead ends: 11958 [2021-06-05 13:46:19,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 497.3ms TimeCoverageRelationStatistics Valid=1016, Invalid=3540, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 13:46:19,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11958 states. [2021-06-05 13:46:19,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11958 to 8793. [2021-06-05 13:46:19,520 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 13:46:19,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8793 states to 8793 states and 27431 transitions. [2021-06-05 13:46:19,536 INFO L78 Accepts]: Start accepts. Automaton has 8793 states and 27431 transitions. Word has length 24 [2021-06-05 13:46:19,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:19,536 INFO L482 AbstractCegarLoop]: Abstraction has 8793 states and 27431 transitions. [2021-06-05 13:46:19,536 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 13:46:19,537 INFO L276 IsEmpty]: Start isEmpty. Operand 8793 states and 27431 transitions. [2021-06-05 13:46:19,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:19,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:19,547 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:19,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,340 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:19,747 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:19,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:19,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1571124593, now seen corresponding path program 337 times [2021-06-05 13:46:19,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:19,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412323309] [2021-06-05 13:46:19,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:19,805 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 13:46:19,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:19,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412323309] [2021-06-05 13:46:19,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412323309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:19,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698936181] [2021-06-05 13:46:19,805 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 13:46:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:19,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:19,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:19,924 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 13:46:19,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698936181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:19,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:19,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 13:46:19,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214475541] [2021-06-05 13:46:19,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:46:19,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:19,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:46:19,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:19,924 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 13:46:20,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:20,491 INFO L93 Difference]: Finished difference Result 12336 states and 37268 transitions. [2021-06-05 13:46:20,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 13:46:20,491 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 13:46:20,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:20,508 INFO L225 Difference]: With dead ends: 12336 [2021-06-05 13:46:20,508 INFO L226 Difference]: Without dead ends: 12321 [2021-06-05 13:46:20,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 474.1ms TimeCoverageRelationStatistics Valid=880, Invalid=3152, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 13:46:20,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12321 states. [2021-06-05 13:46:20,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12321 to 8832. [2021-06-05 13:46:20,673 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 13:46:20,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8832 states to 8832 states and 27546 transitions. [2021-06-05 13:46:20,690 INFO L78 Accepts]: Start accepts. Automaton has 8832 states and 27546 transitions. Word has length 24 [2021-06-05 13:46:20,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:20,690 INFO L482 AbstractCegarLoop]: Abstraction has 8832 states and 27546 transitions. [2021-06-05 13:46:20,690 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 13:46:20,690 INFO L276 IsEmpty]: Start isEmpty. Operand 8832 states and 27546 transitions. [2021-06-05 13:46:20,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:20,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:20,701 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:20,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-06-05 13:46:20,901 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:20,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:20,901 INFO L82 PathProgramCache]: Analyzing trace with hash 541304037, now seen corresponding path program 338 times [2021-06-05 13:46:20,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:20,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567037859] [2021-06-05 13:46:20,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:20,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:20,965 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 13:46:20,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:20,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567037859] [2021-06-05 13:46:20,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567037859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:20,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958076625] [2021-06-05 13:46:20,965 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 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 13:46:20,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:20,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:20,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:20,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:21,088 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 13:46:21,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958076625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:21,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:21,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 13:46:21,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791213421] [2021-06-05 13:46:21,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:46:21,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:21,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:46:21,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:21,089 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 13:46:21,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:21,535 INFO L93 Difference]: Finished difference Result 12564 states and 38035 transitions. [2021-06-05 13:46:21,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 13:46:21,535 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 13:46:21,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:21,553 INFO L225 Difference]: With dead ends: 12564 [2021-06-05 13:46:21,553 INFO L226 Difference]: Without dead ends: 12546 [2021-06-05 13:46:21,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 422.1ms TimeCoverageRelationStatistics Valid=778, Invalid=2762, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 13:46:21,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12546 states. [2021-06-05 13:46:21,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12546 to 8863. [2021-06-05 13:46:21,689 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 13:46:21,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8863 states to 8863 states and 27617 transitions. [2021-06-05 13:46:21,705 INFO L78 Accepts]: Start accepts. Automaton has 8863 states and 27617 transitions. Word has length 24 [2021-06-05 13:46:21,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:21,705 INFO L482 AbstractCegarLoop]: Abstraction has 8863 states and 27617 transitions. [2021-06-05 13:46:21,705 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 13:46:21,705 INFO L276 IsEmpty]: Start isEmpty. Operand 8863 states and 27617 transitions. [2021-06-05 13:46:21,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:21,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:21,716 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:21,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-06-05 13:46:21,929 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:21,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:21,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1602082127, now seen corresponding path program 339 times [2021-06-05 13:46:21,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:21,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039758784] [2021-06-05 13:46:21,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:21,989 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 13:46:21,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:21,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039758784] [2021-06-05 13:46:21,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039758784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:21,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453851215] [2021-06-05 13:46:21,989 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 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 13:46:22,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:46:22,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:22,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:22,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:22,121 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 13:46:22,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453851215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:22,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:22,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 13:46:22,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460818260] [2021-06-05 13:46:22,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:46:22,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:22,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:46:22,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:22,122 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 13:46:22,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:22,462 INFO L93 Difference]: Finished difference Result 11519 states and 34816 transitions. [2021-06-05 13:46:22,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 13:46:22,462 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 13:46:22,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:22,477 INFO L225 Difference]: With dead ends: 11519 [2021-06-05 13:46:22,477 INFO L226 Difference]: Without dead ends: 11501 [2021-06-05 13:46:22,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 348.9ms TimeCoverageRelationStatistics Valid=591, Invalid=1959, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 13:46:22,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11501 states. [2021-06-05 13:46:22,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11501 to 8863. [2021-06-05 13:46:22,594 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 13:46:22,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8863 states to 8863 states and 27611 transitions. [2021-06-05 13:46:22,608 INFO L78 Accepts]: Start accepts. Automaton has 8863 states and 27611 transitions. Word has length 24 [2021-06-05 13:46:22,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:22,608 INFO L482 AbstractCegarLoop]: Abstraction has 8863 states and 27611 transitions. [2021-06-05 13:46:22,609 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 13:46:22,609 INFO L276 IsEmpty]: Start isEmpty. Operand 8863 states and 27611 transitions. [2021-06-05 13:46:22,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:22,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:22,617 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:22,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable632 [2021-06-05 13:46:22,818 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:22,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:22,818 INFO L82 PathProgramCache]: Analyzing trace with hash 370144463, now seen corresponding path program 340 times [2021-06-05 13:46:22,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:22,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660397241] [2021-06-05 13:46:22,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:22,870 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 13:46:22,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:22,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660397241] [2021-06-05 13:46:22,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660397241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:22,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886298696] [2021-06-05 13:46:22,871 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 13:46:22,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:22,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:22,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:22,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:22,992 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 13:46:22,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886298696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:22,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:22,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 13:46:22,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618390138] [2021-06-05 13:46:22,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:46:22,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:22,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:46:22,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:22,993 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 13:46:23,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:23,800 INFO L93 Difference]: Finished difference Result 10540 states and 31822 transitions. [2021-06-05 13:46:23,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 13:46:23,800 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 13:46:23,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:23,814 INFO L225 Difference]: With dead ends: 10540 [2021-06-05 13:46:23,814 INFO L226 Difference]: Without dead ends: 10528 [2021-06-05 13:46:23,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 641.0ms TimeCoverageRelationStatistics Valid=2017, Invalid=3683, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 13:46:23,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10528 states. [2021-06-05 13:46:23,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10528 to 9379. [2021-06-05 13:46:23,939 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 13:46:23,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9379 states to 9379 states and 29382 transitions. [2021-06-05 13:46:23,954 INFO L78 Accepts]: Start accepts. Automaton has 9379 states and 29382 transitions. Word has length 24 [2021-06-05 13:46:23,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:23,954 INFO L482 AbstractCegarLoop]: Abstraction has 9379 states and 29382 transitions. [2021-06-05 13:46:23,954 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 13:46:23,954 INFO L276 IsEmpty]: Start isEmpty. Operand 9379 states and 29382 transitions. [2021-06-05 13:46:23,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:23,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:23,963 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:24,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable633,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:24,169 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:24,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:24,169 INFO L82 PathProgramCache]: Analyzing trace with hash -94446641, now seen corresponding path program 341 times [2021-06-05 13:46:24,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:24,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024815665] [2021-06-05 13:46:24,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:24,221 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 13:46:24,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:24,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024815665] [2021-06-05 13:46:24,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024815665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:24,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367165601] [2021-06-05 13:46:24,221 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 13:46:24,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:46:24,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:24,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:24,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:24,347 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 13:46:24,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367165601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:24,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:24,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 13:46:24,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224469583] [2021-06-05 13:46:24,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:46:24,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:24,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:46:24,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:24,348 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 13:46:25,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:25,217 INFO L93 Difference]: Finished difference Result 10146 states and 30795 transitions. [2021-06-05 13:46:25,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 13:46:25,218 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 13:46:25,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:25,229 INFO L225 Difference]: With dead ends: 10146 [2021-06-05 13:46:25,229 INFO L226 Difference]: Without dead ends: 10136 [2021-06-05 13:46:25,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1977 ImplicationChecksByTransitivity, 750.3ms TimeCoverageRelationStatistics Valid=2525, Invalid=5131, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 13:46:25,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10136 states. [2021-06-05 13:46:25,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10136 to 8546. [2021-06-05 13:46:25,345 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 13:46:25,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8546 states to 8546 states and 26532 transitions. [2021-06-05 13:46:25,360 INFO L78 Accepts]: Start accepts. Automaton has 8546 states and 26532 transitions. Word has length 24 [2021-06-05 13:46:25,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:25,361 INFO L482 AbstractCegarLoop]: Abstraction has 8546 states and 26532 transitions. [2021-06-05 13:46:25,361 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 13:46:25,361 INFO L276 IsEmpty]: Start isEmpty. Operand 8546 states and 26532 transitions. [2021-06-05 13:46:25,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:25,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:25,371 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:25,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable634 [2021-06-05 13:46:25,571 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:25,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:25,571 INFO L82 PathProgramCache]: Analyzing trace with hash -128045869, now seen corresponding path program 342 times [2021-06-05 13:46:25,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:25,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392018284] [2021-06-05 13:46:25,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:25,635 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 13:46:25,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:25,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392018284] [2021-06-05 13:46:25,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392018284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:25,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161531758] [2021-06-05 13:46:25,636 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 13:46:25,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:46:25,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:25,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:25,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:25,761 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 13:46:25,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161531758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:25,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:25,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 13:46:25,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514804602] [2021-06-05 13:46:25,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:46:25,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:25,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:46:25,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:46:25,762 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 13:46:26,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:26,560 INFO L93 Difference]: Finished difference Result 9224 states and 27859 transitions. [2021-06-05 13:46:26,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 13:46:26,560 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 13:46:26,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:26,572 INFO L225 Difference]: With dead ends: 9224 [2021-06-05 13:46:26,572 INFO L226 Difference]: Without dead ends: 9216 [2021-06-05 13:46:26,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 697.7ms TimeCoverageRelationStatistics Valid=2548, Invalid=5284, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 13:46:26,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9216 states. [2021-06-05 13:46:26,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9216 to 8570. [2021-06-05 13:46:26,707 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 13:46:26,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8570 states to 8570 states and 26600 transitions. [2021-06-05 13:46:26,723 INFO L78 Accepts]: Start accepts. Automaton has 8570 states and 26600 transitions. Word has length 24 [2021-06-05 13:46:26,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:26,723 INFO L482 AbstractCegarLoop]: Abstraction has 8570 states and 26600 transitions. [2021-06-05 13:46:26,723 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 13:46:26,723 INFO L276 IsEmpty]: Start isEmpty. Operand 8570 states and 26600 transitions. [2021-06-05 13:46:26,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:26,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:26,733 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:26,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable635 [2021-06-05 13:46:26,933 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:26,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:26,934 INFO L82 PathProgramCache]: Analyzing trace with hash 653566347, now seen corresponding path program 343 times [2021-06-05 13:46:26,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:26,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86685260] [2021-06-05 13:46:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:26,982 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 13:46:26,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:26,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86685260] [2021-06-05 13:46:26,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86685260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:26,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194717323] [2021-06-05 13:46:26,982 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 13:46:27,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:27,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:27,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:27,146 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 13:46:27,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194717323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:27,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:27,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 13:46:27,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115301411] [2021-06-05 13:46:27,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:46:27,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:27,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:46:27,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:27,147 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 13:46:27,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:27,907 INFO L93 Difference]: Finished difference Result 10464 states and 31357 transitions. [2021-06-05 13:46:27,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 13:46:27,907 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 13:46:27,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:27,921 INFO L225 Difference]: With dead ends: 10464 [2021-06-05 13:46:27,921 INFO L226 Difference]: Without dead ends: 10443 [2021-06-05 13:46:27,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 620.1ms TimeCoverageRelationStatistics Valid=1915, Invalid=3487, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 13:46:27,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10443 states. [2021-06-05 13:46:28,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10443 to 9099. [2021-06-05 13:46:28,046 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 13:46:28,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9099 states to 9099 states and 28411 transitions. [2021-06-05 13:46:28,062 INFO L78 Accepts]: Start accepts. Automaton has 9099 states and 28411 transitions. Word has length 24 [2021-06-05 13:46:28,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:28,062 INFO L482 AbstractCegarLoop]: Abstraction has 9099 states and 28411 transitions. [2021-06-05 13:46:28,062 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 13:46:28,062 INFO L276 IsEmpty]: Start isEmpty. Operand 9099 states and 28411 transitions. [2021-06-05 13:46:28,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:28,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:28,073 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:28,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:28,273 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:28,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:28,273 INFO L82 PathProgramCache]: Analyzing trace with hash 188975243, now seen corresponding path program 344 times [2021-06-05 13:46:28,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:28,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705771377] [2021-06-05 13:46:28,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:28,320 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 13:46:28,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:28,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705771377] [2021-06-05 13:46:28,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705771377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:28,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986101082] [2021-06-05 13:46:28,321 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 13:46:28,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:28,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:28,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:28,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:28,454 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 13:46:28,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986101082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:28,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:28,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 13:46:28,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332599280] [2021-06-05 13:46:28,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:46:28,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:28,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:46:28,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:28,455 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 13:46:29,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:29,378 INFO L93 Difference]: Finished difference Result 9961 states and 30084 transitions. [2021-06-05 13:46:29,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 13:46:29,379 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 13:46:29,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:29,392 INFO L225 Difference]: With dead ends: 9961 [2021-06-05 13:46:29,392 INFO L226 Difference]: Without dead ends: 9953 [2021-06-05 13:46:29,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2214 ImplicationChecksByTransitivity, 794.7ms TimeCoverageRelationStatistics Valid=2592, Invalid=5598, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 13:46:29,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9953 states. [2021-06-05 13:46:29,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9953 to 8603. [2021-06-05 13:46:29,511 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 13:46:29,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8603 states to 8603 states and 26721 transitions. [2021-06-05 13:46:29,527 INFO L78 Accepts]: Start accepts. Automaton has 8603 states and 26721 transitions. Word has length 24 [2021-06-05 13:46:29,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:29,527 INFO L482 AbstractCegarLoop]: Abstraction has 8603 states and 26721 transitions. [2021-06-05 13:46:29,527 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 13:46:29,527 INFO L276 IsEmpty]: Start isEmpty. Operand 8603 states and 26721 transitions. [2021-06-05 13:46:29,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:29,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:29,537 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:29,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:29,738 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:29,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:29,738 INFO L82 PathProgramCache]: Analyzing trace with hash 155376015, now seen corresponding path program 345 times [2021-06-05 13:46:29,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:29,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412114898] [2021-06-05 13:46:29,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:29,790 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 13:46:29,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:29,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412114898] [2021-06-05 13:46:29,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412114898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:29,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502268068] [2021-06-05 13:46:29,791 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 13:46:29,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:46:29,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:29,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:29,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:29,924 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 13:46:29,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502268068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:29,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:29,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-06-05 13:46:29,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968936299] [2021-06-05 13:46:29,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:46:29,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:29,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:46:29,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:46:29,925 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 13:46:30,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:30,846 INFO L93 Difference]: Finished difference Result 9572 states and 28782 transitions. [2021-06-05 13:46:30,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 13:46:30,847 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 13:46:30,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:30,858 INFO L225 Difference]: With dead ends: 9572 [2021-06-05 13:46:30,858 INFO L226 Difference]: Without dead ends: 9556 [2021-06-05 13:46:30,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 798.2ms TimeCoverageRelationStatistics Valid=2475, Invalid=5535, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 13:46:30,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9556 states. [2021-06-05 13:46:30,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9556 to 8460. [2021-06-05 13:46:30,966 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 13:46:30,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8460 states to 8460 states and 26279 transitions. [2021-06-05 13:46:30,981 INFO L78 Accepts]: Start accepts. Automaton has 8460 states and 26279 transitions. Word has length 24 [2021-06-05 13:46:30,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:30,981 INFO L482 AbstractCegarLoop]: Abstraction has 8460 states and 26279 transitions. [2021-06-05 13:46:30,981 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 13:46:30,981 INFO L276 IsEmpty]: Start isEmpty. Operand 8460 states and 26279 transitions. [2021-06-05 13:46:30,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:30,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:30,990 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:31,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:31,190 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:31,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:31,191 INFO L82 PathProgramCache]: Analyzing trace with hash -886200053, now seen corresponding path program 346 times [2021-06-05 13:46:31,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:31,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995985251] [2021-06-05 13:46:31,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:31,249 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 13:46:31,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:31,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995985251] [2021-06-05 13:46:31,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995985251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:31,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646347184] [2021-06-05 13:46:31,249 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 13:46:31,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:31,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:31,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:31,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:31,383 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 13:46:31,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646347184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:31,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:31,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 13:46:31,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216743664] [2021-06-05 13:46:31,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:46:31,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:31,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:46:31,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:46:31,384 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 13:46:32,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:32,169 INFO L93 Difference]: Finished difference Result 9239 states and 27893 transitions. [2021-06-05 13:46:32,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 13:46:32,169 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 13:46:32,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:32,179 INFO L225 Difference]: With dead ends: 9239 [2021-06-05 13:46:32,179 INFO L226 Difference]: Without dead ends: 9227 [2021-06-05 13:46:32,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2306 ImplicationChecksByTransitivity, 691.4ms TimeCoverageRelationStatistics Valid=2455, Invalid=5555, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 13:46:32,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9227 states. [2021-06-05 13:46:32,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9227 to 8490. [2021-06-05 13:46:32,278 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 13:46:32,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8490 states to 8490 states and 26377 transitions. [2021-06-05 13:46:32,292 INFO L78 Accepts]: Start accepts. Automaton has 8490 states and 26377 transitions. Word has length 24 [2021-06-05 13:46:32,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:32,292 INFO L482 AbstractCegarLoop]: Abstraction has 8490 states and 26377 transitions. [2021-06-05 13:46:32,292 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 13:46:32,292 INFO L276 IsEmpty]: Start isEmpty. Operand 8490 states and 26377 transitions. [2021-06-05 13:46:32,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:32,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:32,301 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:32,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable639 [2021-06-05 13:46:32,501 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:32,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:32,501 INFO L82 PathProgramCache]: Analyzing trace with hash 849710159, now seen corresponding path program 347 times [2021-06-05 13:46:32,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:32,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148317968] [2021-06-05 13:46:32,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:32,544 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 13:46:32,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:32,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148317968] [2021-06-05 13:46:32,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148317968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:32,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795595047] [2021-06-05 13:46:32,544 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 13:46:32,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:46:32,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:32,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:32,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:32,680 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 13:46:32,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795595047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:32,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:32,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-06-05 13:46:32,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266718227] [2021-06-05 13:46:32,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:46:32,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:32,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:46:32,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:32,681 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 13:46:33,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:33,403 INFO L93 Difference]: Finished difference Result 10604 states and 31742 transitions. [2021-06-05 13:46:33,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 13:46:33,404 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 13:46:33,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:33,418 INFO L225 Difference]: With dead ends: 10604 [2021-06-05 13:46:33,418 INFO L226 Difference]: Without dead ends: 10586 [2021-06-05 13:46:33,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 603.3ms TimeCoverageRelationStatistics Valid=1821, Invalid=3291, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 13:46:33,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10586 states. [2021-06-05 13:46:33,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10586 to 8963. [2021-06-05 13:46:33,543 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 13:46:33,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8963 states to 8963 states and 27975 transitions. [2021-06-05 13:46:33,609 INFO L78 Accepts]: Start accepts. Automaton has 8963 states and 27975 transitions. Word has length 24 [2021-06-05 13:46:33,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:33,609 INFO L482 AbstractCegarLoop]: Abstraction has 8963 states and 27975 transitions. [2021-06-05 13:46:33,609 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 13:46:33,609 INFO L276 IsEmpty]: Start isEmpty. Operand 8963 states and 27975 transitions. [2021-06-05 13:46:33,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:33,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:33,619 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:33,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable640 [2021-06-05 13:46:33,819 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:33,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:33,819 INFO L82 PathProgramCache]: Analyzing trace with hash 385119055, now seen corresponding path program 348 times [2021-06-05 13:46:33,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:33,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532613713] [2021-06-05 13:46:33,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:33,861 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 13:46:33,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:33,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532613713] [2021-06-05 13:46:33,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532613713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:33,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128277205] [2021-06-05 13:46:33,862 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 13:46:33,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:46:33,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:33,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:33,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:33,994 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 13:46:33,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128277205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:33,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:33,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-06-05 13:46:33,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465173130] [2021-06-05 13:46:33,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:46:33,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:33,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:46:33,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:33,995 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 13:46:34,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:34,937 INFO L93 Difference]: Finished difference Result 9967 states and 30031 transitions. [2021-06-05 13:46:34,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 13:46:34,937 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 13:46:34,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:34,948 INFO L225 Difference]: With dead ends: 9967 [2021-06-05 13:46:34,948 INFO L226 Difference]: Without dead ends: 9961 [2021-06-05 13:46:34,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2668 ImplicationChecksByTransitivity, 827.6ms TimeCoverageRelationStatistics Valid=2787, Invalid=6333, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 13:46:34,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2021-06-05 13:46:35,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 8724. [2021-06-05 13:46:35,057 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 13:46:35,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8724 states to 8724 states and 27152 transitions. [2021-06-05 13:46:35,073 INFO L78 Accepts]: Start accepts. Automaton has 8724 states and 27152 transitions. Word has length 24 [2021-06-05 13:46:35,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:35,073 INFO L482 AbstractCegarLoop]: Abstraction has 8724 states and 27152 transitions. [2021-06-05 13:46:35,073 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 13:46:35,073 INFO L276 IsEmpty]: Start isEmpty. Operand 8724 states and 27152 transitions. [2021-06-05 13:46:35,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:35,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:35,084 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:35,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable641,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:35,284 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:35,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:35,284 INFO L82 PathProgramCache]: Analyzing trace with hash 351519827, now seen corresponding path program 349 times [2021-06-05 13:46:35,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:35,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086710758] [2021-06-05 13:46:35,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:35,332 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 13:46:35,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:35,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086710758] [2021-06-05 13:46:35,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086710758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:35,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557807028] [2021-06-05 13:46:35,333 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 13:46:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:35,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:35,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:35,468 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 13:46:35,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557807028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:35,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:35,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-06-05 13:46:35,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388237581] [2021-06-05 13:46:35,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:46:35,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:35,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:46:35,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:46:35,469 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 13:46:36,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:36,381 INFO L93 Difference]: Finished difference Result 9884 states and 29758 transitions. [2021-06-05 13:46:36,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 13:46:36,382 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 13:46:36,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:36,394 INFO L225 Difference]: With dead ends: 9884 [2021-06-05 13:46:36,394 INFO L226 Difference]: Without dead ends: 9874 [2021-06-05 13:46:36,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2512 ImplicationChecksByTransitivity, 797.8ms TimeCoverageRelationStatistics Valid=2529, Invalid=6027, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 13:46:36,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9874 states. [2021-06-05 13:46:36,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9874 to 8701. [2021-06-05 13:46:36,512 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 13:46:36,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8701 states to 8701 states and 27086 transitions. [2021-06-05 13:46:36,528 INFO L78 Accepts]: Start accepts. Automaton has 8701 states and 27086 transitions. Word has length 24 [2021-06-05 13:46:36,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:36,528 INFO L482 AbstractCegarLoop]: Abstraction has 8701 states and 27086 transitions. [2021-06-05 13:46:36,528 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 13:46:36,528 INFO L276 IsEmpty]: Start isEmpty. Operand 8701 states and 27086 transitions. [2021-06-05 13:46:36,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:36,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:36,538 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:36,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-06-05 13:46:36,738 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:36,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:36,738 INFO L82 PathProgramCache]: Analyzing trace with hash -690056241, now seen corresponding path program 350 times [2021-06-05 13:46:36,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:36,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109680576] [2021-06-05 13:46:36,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:36,797 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 13:46:36,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:36,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109680576] [2021-06-05 13:46:36,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109680576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:36,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786258086] [2021-06-05 13:46:36,798 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 13:46:36,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:36,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:36,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:36,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:36,954 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 13:46:36,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786258086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:36,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:36,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-06-05 13:46:36,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775594877] [2021-06-05 13:46:36,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:46:36,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:36,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:46:36,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:46:36,955 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 13:46:37,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:37,823 INFO L93 Difference]: Finished difference Result 9922 states and 29903 transitions. [2021-06-05 13:46:37,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 13:46:37,824 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 13:46:37,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:37,837 INFO L225 Difference]: With dead ends: 9922 [2021-06-05 13:46:37,837 INFO L226 Difference]: Without dead ends: 9904 [2021-06-05 13:46:37,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2457 ImplicationChecksByTransitivity, 789.5ms TimeCoverageRelationStatistics Valid=2373, Invalid=5817, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 13:46:37,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9904 states. [2021-06-05 13:46:37,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9904 to 8685. [2021-06-05 13:46:37,949 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 13:46:37,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8685 states to 8685 states and 27079 transitions. [2021-06-05 13:46:37,965 INFO L78 Accepts]: Start accepts. Automaton has 8685 states and 27079 transitions. Word has length 24 [2021-06-05 13:46:37,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:37,965 INFO L482 AbstractCegarLoop]: Abstraction has 8685 states and 27079 transitions. [2021-06-05 13:46:37,965 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 13:46:37,965 INFO L276 IsEmpty]: Start isEmpty. Operand 8685 states and 27079 transitions. [2021-06-05 13:46:37,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:37,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:37,974 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:38,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable643,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:38,175 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:38,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:38,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1380824019, now seen corresponding path program 351 times [2021-06-05 13:46:38,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:38,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70776043] [2021-06-05 13:46:38,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:38,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:38,234 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 13:46:38,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:38,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70776043] [2021-06-05 13:46:38,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70776043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:38,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536555280] [2021-06-05 13:46:38,235 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 13:46:38,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:46:38,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:38,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:38,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:38,377 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 13:46:38,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536555280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:38,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:38,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 13:46:38,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476431111] [2021-06-05 13:46:38,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:46:38,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:38,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:46:38,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:46:38,378 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 13:46:39,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:39,153 INFO L93 Difference]: Finished difference Result 9621 states and 29138 transitions. [2021-06-05 13:46:39,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 13:46:39,153 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 13:46:39,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:39,165 INFO L225 Difference]: With dead ends: 9621 [2021-06-05 13:46:39,165 INFO L226 Difference]: Without dead ends: 9605 [2021-06-05 13:46:39,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 706.6ms TimeCoverageRelationStatistics Valid=2313, Invalid=5697, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 13:46:39,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9605 states. [2021-06-05 13:46:39,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9605 to 8716. [2021-06-05 13:46:39,274 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 13:46:39,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8716 states to 8716 states and 27184 transitions. [2021-06-05 13:46:39,290 INFO L78 Accepts]: Start accepts. Automaton has 8716 states and 27184 transitions. Word has length 24 [2021-06-05 13:46:39,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:39,291 INFO L482 AbstractCegarLoop]: Abstraction has 8716 states and 27184 transitions. [2021-06-05 13:46:39,291 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 13:46:39,291 INFO L276 IsEmpty]: Start isEmpty. Operand 8716 states and 27184 transitions. [2021-06-05 13:46:39,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:39,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:39,301 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:39,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable644 [2021-06-05 13:46:39,501 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:39,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:39,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1659766261, now seen corresponding path program 352 times [2021-06-05 13:46:39,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:39,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439146744] [2021-06-05 13:46:39,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:39,539 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 13:46:39,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:39,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439146744] [2021-06-05 13:46:39,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439146744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:39,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884416863] [2021-06-05 13:46:39,539 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 13:46:39,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:39,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:39,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:39,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:39,675 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 13:46:39,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884416863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:39,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:39,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2021-06-05 13:46:39,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167282811] [2021-06-05 13:46:39,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:46:39,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:39,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:46:39,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:39,676 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 13:46:40,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:40,388 INFO L93 Difference]: Finished difference Result 11348 states and 34100 transitions. [2021-06-05 13:46:40,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 13:46:40,389 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 13:46:40,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:40,404 INFO L225 Difference]: With dead ends: 11348 [2021-06-05 13:46:40,404 INFO L226 Difference]: Without dead ends: 11333 [2021-06-05 13:46:40,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 589.4ms TimeCoverageRelationStatistics Valid=1717, Invalid=3113, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 13:46:40,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11333 states. [2021-06-05 13:46:40,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11333 to 9625. [2021-06-05 13:46:40,567 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 13:46:40,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9625 states to 9625 states and 30217 transitions. [2021-06-05 13:46:40,584 INFO L78 Accepts]: Start accepts. Automaton has 9625 states and 30217 transitions. Word has length 24 [2021-06-05 13:46:40,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:40,585 INFO L482 AbstractCegarLoop]: Abstraction has 9625 states and 30217 transitions. [2021-06-05 13:46:40,585 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 13:46:40,585 INFO L276 IsEmpty]: Start isEmpty. Operand 9625 states and 30217 transitions. [2021-06-05 13:46:40,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:40,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:40,596 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:40,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable645,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:40,796 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:40,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:40,797 INFO L82 PathProgramCache]: Analyzing trace with hash -2124357365, now seen corresponding path program 353 times [2021-06-05 13:46:40,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:40,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80577456] [2021-06-05 13:46:40,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:40,835 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 13:46:40,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:40,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80577456] [2021-06-05 13:46:40,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80577456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:40,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993478214] [2021-06-05 13:46:40,835 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 13:46:40,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:46:40,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:40,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:40,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:40,968 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 13:46:40,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993478214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:40,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:40,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2021-06-05 13:46:40,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127486501] [2021-06-05 13:46:40,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:46:40,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:40,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:46:40,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:40,969 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 13:46:42,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:42,021 INFO L93 Difference]: Finished difference Result 10893 states and 32965 transitions. [2021-06-05 13:46:42,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 13:46:42,022 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 13:46:42,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:42,033 INFO L225 Difference]: With dead ends: 10893 [2021-06-05 13:46:42,034 INFO L226 Difference]: Without dead ends: 10887 [2021-06-05 13:46:42,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3384 ImplicationChecksByTransitivity, 910.8ms TimeCoverageRelationStatistics Valid=3090, Invalid=7416, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 13:46:42,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10887 states. [2021-06-05 13:46:42,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10887 to 9443. [2021-06-05 13:46:42,156 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 13:46:42,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9443 states to 9443 states and 29590 transitions. [2021-06-05 13:46:42,173 INFO L78 Accepts]: Start accepts. Automaton has 9443 states and 29590 transitions. Word has length 24 [2021-06-05 13:46:42,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:42,173 INFO L482 AbstractCegarLoop]: Abstraction has 9443 states and 29590 transitions. [2021-06-05 13:46:42,173 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 13:46:42,173 INFO L276 IsEmpty]: Start isEmpty. Operand 9443 states and 29590 transitions. [2021-06-05 13:46:42,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:42,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:42,184 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:42,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable646 [2021-06-05 13:46:42,384 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:42,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:42,384 INFO L82 PathProgramCache]: Analyzing trace with hash 2137010703, now seen corresponding path program 354 times [2021-06-05 13:46:42,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:42,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875182310] [2021-06-05 13:46:42,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:42,440 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 13:46:42,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:42,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875182310] [2021-06-05 13:46:42,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875182310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:42,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660640513] [2021-06-05 13:46:42,440 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 13:46:42,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:46:42,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:42,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:42,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:42,578 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 13:46:42,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660640513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:42,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:42,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 23 [2021-06-05 13:46:42,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560621459] [2021-06-05 13:46:42,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:46:42,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:42,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:46:42,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:46:42,579 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 13:46:43,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:43,570 INFO L93 Difference]: Finished difference Result 10963 states and 33243 transitions. [2021-06-05 13:46:43,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 13:46:43,570 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 13:46:43,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:43,584 INFO L225 Difference]: With dead ends: 10963 [2021-06-05 13:46:43,584 INFO L226 Difference]: Without dead ends: 10955 [2021-06-05 13:46:43,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3015 ImplicationChecksByTransitivity, 856.1ms TimeCoverageRelationStatistics Valid=2700, Invalid=6806, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 13:46:43,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10955 states. [2021-06-05 13:46:43,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10955 to 9488. [2021-06-05 13:46:43,705 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 13:46:43,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9488 states to 9488 states and 29739 transitions. [2021-06-05 13:46:43,720 INFO L78 Accepts]: Start accepts. Automaton has 9488 states and 29739 transitions. Word has length 24 [2021-06-05 13:46:43,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:43,720 INFO L482 AbstractCegarLoop]: Abstraction has 9488 states and 29739 transitions. [2021-06-05 13:46:43,720 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 13:46:43,720 INFO L276 IsEmpty]: Start isEmpty. Operand 9488 states and 29739 transitions. [2021-06-05 13:46:43,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:43,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:43,730 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:43,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable647,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:43,930 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:43,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:43,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1095434635, now seen corresponding path program 355 times [2021-06-05 13:46:43,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:43,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497463710] [2021-06-05 13:46:43,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:44,031 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 13:46:44,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:44,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497463710] [2021-06-05 13:46:44,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497463710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:44,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806716203] [2021-06-05 13:46:44,031 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 13:46:44,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:44,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:44,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:44,171 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 13:46:44,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806716203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:44,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:44,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-06-05 13:46:44,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345227916] [2021-06-05 13:46:44,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:46:44,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:44,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:46:44,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:46:44,172 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 13:46:45,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:45,083 INFO L93 Difference]: Finished difference Result 11074 states and 33620 transitions. [2021-06-05 13:46:45,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 13:46:45,083 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 13:46:45,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:45,095 INFO L225 Difference]: With dead ends: 11074 [2021-06-05 13:46:45,095 INFO L226 Difference]: Without dead ends: 11062 [2021-06-05 13:46:45,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 855.2ms TimeCoverageRelationStatistics Valid=2410, Invalid=6332, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 13:46:45,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11062 states. [2021-06-05 13:46:45,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11062 to 9716. [2021-06-05 13:46:45,226 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 13:46:45,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9716 states to 9716 states and 30491 transitions. [2021-06-05 13:46:45,243 INFO L78 Accepts]: Start accepts. Automaton has 9716 states and 30491 transitions. Word has length 24 [2021-06-05 13:46:45,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:45,243 INFO L482 AbstractCegarLoop]: Abstraction has 9716 states and 30491 transitions. [2021-06-05 13:46:45,243 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 13:46:45,244 INFO L276 IsEmpty]: Start isEmpty. Operand 9716 states and 30491 transitions. [2021-06-05 13:46:45,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:45,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:45,254 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:45,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable648 [2021-06-05 13:46:45,455 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:45,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:45,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1128652401, now seen corresponding path program 356 times [2021-06-05 13:46:45,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:45,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143989901] [2021-06-05 13:46:45,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:45,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:45,509 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 13:46:45,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:45,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143989901] [2021-06-05 13:46:45,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143989901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:45,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561865741] [2021-06-05 13:46:45,509 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 13:46:45,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:45,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:45,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:45,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:45,653 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 13:46:45,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561865741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:45,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:45,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-06-05 13:46:45,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473478027] [2021-06-05 13:46:45,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:46:45,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:45,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:46:45,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:46:45,654 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 13:46:46,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:46,506 INFO L93 Difference]: Finished difference Result 11386 states and 34650 transitions. [2021-06-05 13:46:46,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 13:46:46,506 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 13:46:46,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:46,521 INFO L225 Difference]: With dead ends: 11386 [2021-06-05 13:46:46,521 INFO L226 Difference]: Without dead ends: 11370 [2021-06-05 13:46:46,522 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 13:46:46,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11370 states. [2021-06-05 13:46:46,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11370 to 9979. [2021-06-05 13:46:46,660 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 13:46:46,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9979 states to 9979 states and 31380 transitions. [2021-06-05 13:46:46,678 INFO L78 Accepts]: Start accepts. Automaton has 9979 states and 31380 transitions. Word has length 24 [2021-06-05 13:46:46,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:46,679 INFO L482 AbstractCegarLoop]: Abstraction has 9979 states and 31380 transitions. [2021-06-05 13:46:46,679 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 13:46:46,679 INFO L276 IsEmpty]: Start isEmpty. Operand 9979 states and 31380 transitions. [2021-06-05 13:46:46,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:46,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:46,690 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:46,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable649,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:46,890 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:46,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:46,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1355873781, now seen corresponding path program 357 times [2021-06-05 13:46:46,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:46,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095581136] [2021-06-05 13:46:46,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:46,958 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 13:46:46,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:46,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095581136] [2021-06-05 13:46:46,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095581136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:46,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345523034] [2021-06-05 13:46:46,958 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 13:46:46,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:46:46,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:46,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:46,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:47,111 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 13:46:47,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345523034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:47,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:47,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-06-05 13:46:47,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983898442] [2021-06-05 13:46:47,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:46:47,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:47,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:46:47,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:46:47,112 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 13:46:47,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:47,872 INFO L93 Difference]: Finished difference Result 11190 states and 34200 transitions. [2021-06-05 13:46:47,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 13:46:47,872 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 13:46:47,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:47,886 INFO L225 Difference]: With dead ends: 11190 [2021-06-05 13:46:47,887 INFO L226 Difference]: Without dead ends: 11170 [2021-06-05 13:46:47,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2376 ImplicationChecksByTransitivity, 702.3ms TimeCoverageRelationStatistics Valid=2129, Invalid=5703, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 13:46:47,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11170 states. [2021-06-05 13:46:48,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11170 to 10023. [2021-06-05 13:46:48,013 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 13:46:48,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10023 states to 10023 states and 31516 transitions. [2021-06-05 13:46:48,030 INFO L78 Accepts]: Start accepts. Automaton has 10023 states and 31516 transitions. Word has length 24 [2021-06-05 13:46:48,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:48,030 INFO L482 AbstractCegarLoop]: Abstraction has 10023 states and 31516 transitions. [2021-06-05 13:46:48,030 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 13:46:48,030 INFO L276 IsEmpty]: Start isEmpty. Operand 10023 states and 31516 transitions. [2021-06-05 13:46:48,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:48,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:48,041 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:48,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-06-05 13:46:48,242 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:48,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:48,242 INFO L82 PathProgramCache]: Analyzing trace with hash -2144123953, now seen corresponding path program 358 times [2021-06-05 13:46:48,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:48,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921827030] [2021-06-05 13:46:48,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:48,275 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 13:46:48,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:48,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921827030] [2021-06-05 13:46:48,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921827030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:48,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775439121] [2021-06-05 13:46:48,275 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 13:46:48,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:48,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:48,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:48,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:48,418 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 13:46:48,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775439121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:48,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:48,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 22 [2021-06-05 13:46:48,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530379248] [2021-06-05 13:46:48,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:46:48,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:48,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:46:48,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:48,419 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 13:46:49,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:49,139 INFO L93 Difference]: Finished difference Result 14250 states and 43629 transitions. [2021-06-05 13:46:49,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 13:46:49,139 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 13:46:49,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:49,159 INFO L225 Difference]: With dead ends: 14250 [2021-06-05 13:46:49,159 INFO L226 Difference]: Without dead ends: 14238 [2021-06-05 13:46:49,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1555 ImplicationChecksByTransitivity, 577.5ms TimeCoverageRelationStatistics Valid=1679, Invalid=3151, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 13:46:49,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14238 states. [2021-06-05 13:46:49,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14238 to 11906. [2021-06-05 13:46:49,324 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 13:46:49,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11906 states to 11906 states and 37918 transitions. [2021-06-05 13:46:49,346 INFO L78 Accepts]: Start accepts. Automaton has 11906 states and 37918 transitions. Word has length 24 [2021-06-05 13:46:49,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:49,346 INFO L482 AbstractCegarLoop]: Abstraction has 11906 states and 37918 transitions. [2021-06-05 13:46:49,347 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 13:46:49,347 INFO L276 IsEmpty]: Start isEmpty. Operand 11906 states and 37918 transitions. [2021-06-05 13:46:49,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:49,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:49,361 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:49,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable651,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:49,561 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:49,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:49,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1686252239, now seen corresponding path program 359 times [2021-06-05 13:46:49,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:49,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984911201] [2021-06-05 13:46:49,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:49,595 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 13:46:49,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:49,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984911201] [2021-06-05 13:46:49,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984911201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:49,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837206562] [2021-06-05 13:46:49,595 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 13:46:49,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:46:49,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:49,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:49,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:49,755 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 13:46:49,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837206562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:49,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:49,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 22 [2021-06-05 13:46:49,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020940903] [2021-06-05 13:46:49,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:46:49,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:49,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:46:49,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:46:49,756 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 13:46:51,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:51,007 INFO L93 Difference]: Finished difference Result 13468 states and 41406 transitions. [2021-06-05 13:46:51,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 13:46:51,008 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 13:46:51,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:51,025 INFO L225 Difference]: With dead ends: 13468 [2021-06-05 13:46:51,026 INFO L226 Difference]: Without dead ends: 13464 [2021-06-05 13:46:51,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4938 ImplicationChecksByTransitivity, 1098.2ms TimeCoverageRelationStatistics Valid=3452, Invalid=8980, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 13:46:51,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13464 states. [2021-06-05 13:46:51,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13464 to 11668. [2021-06-05 13:46:51,174 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 13:46:51,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11668 states to 11668 states and 37083 transitions. [2021-06-05 13:46:51,194 INFO L78 Accepts]: Start accepts. Automaton has 11668 states and 37083 transitions. Word has length 24 [2021-06-05 13:46:51,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:51,195 INFO L482 AbstractCegarLoop]: Abstraction has 11668 states and 37083 transitions. [2021-06-05 13:46:51,195 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 13:46:51,195 INFO L276 IsEmpty]: Start isEmpty. Operand 11668 states and 37083 transitions. [2021-06-05 13:46:51,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:51,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:51,207 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:51,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-06-05 13:46:51,407 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:51,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:51,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1652653011, now seen corresponding path program 360 times [2021-06-05 13:46:51,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:51,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297563601] [2021-06-05 13:46:51,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:51,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:51,445 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 13:46:51,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:51,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297563601] [2021-06-05 13:46:51,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297563601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:51,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464775160] [2021-06-05 13:46:51,446 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 13:46:51,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:46:51,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:51,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:51,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:51,587 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 13:46:51,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464775160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:51,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:51,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 23 [2021-06-05 13:46:51,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404975012] [2021-06-05 13:46:51,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:46:51,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:51,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:46:51,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:46:51,588 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 13:46:52,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:52,710 INFO L93 Difference]: Finished difference Result 13667 states and 42198 transitions. [2021-06-05 13:46:52,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 13:46:52,710 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 13:46:52,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:52,728 INFO L225 Difference]: With dead ends: 13667 [2021-06-05 13:46:52,728 INFO L226 Difference]: Without dead ends: 13659 [2021-06-05 13:46:52,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4206 ImplicationChecksByTransitivity, 946.5ms TimeCoverageRelationStatistics Valid=2955, Invalid=7965, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 13:46:52,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13659 states. [2021-06-05 13:46:52,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13659 to 11875. [2021-06-05 13:46:52,884 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 13:46:52,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11875 states to 11875 states and 37816 transitions. [2021-06-05 13:46:52,907 INFO L78 Accepts]: Start accepts. Automaton has 11875 states and 37816 transitions. Word has length 24 [2021-06-05 13:46:52,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:52,907 INFO L482 AbstractCegarLoop]: Abstraction has 11875 states and 37816 transitions. [2021-06-05 13:46:52,908 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 13:46:52,908 INFO L276 IsEmpty]: Start isEmpty. Operand 11875 states and 37816 transitions. [2021-06-05 13:46:52,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:52,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:52,921 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:53,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2021-06-05 13:46:53,122 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:53,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:53,122 INFO L82 PathProgramCache]: Analyzing trace with hash 611076943, now seen corresponding path program 361 times [2021-06-05 13:46:53,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:53,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12860029] [2021-06-05 13:46:53,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:53,166 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 13:46:53,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:53,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12860029] [2021-06-05 13:46:53,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12860029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:53,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110266538] [2021-06-05 13:46:53,167 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 13:46:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:53,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:53,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:53,314 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 13:46:53,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110266538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:53,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:53,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2021-06-05 13:46:53,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118831455] [2021-06-05 13:46:53,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:46:53,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:53,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:46:53,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:46:53,315 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 13:46:54,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:54,350 INFO L93 Difference]: Finished difference Result 14012 states and 43421 transitions. [2021-06-05 13:46:54,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 13:46:54,350 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 13:46:54,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:54,370 INFO L225 Difference]: With dead ends: 14012 [2021-06-05 13:46:54,371 INFO L226 Difference]: Without dead ends: 14000 [2021-06-05 13:46:54,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3606 ImplicationChecksByTransitivity, 899.6ms TimeCoverageRelationStatistics Valid=2546, Invalid=7156, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 13:46:54,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14000 states. [2021-06-05 13:46:54,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14000 to 12230. [2021-06-05 13:46:54,542 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 13:46:54,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12230 states to 12230 states and 39011 transitions. [2021-06-05 13:46:54,564 INFO L78 Accepts]: Start accepts. Automaton has 12230 states and 39011 transitions. Word has length 24 [2021-06-05 13:46:54,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:54,564 INFO L482 AbstractCegarLoop]: Abstraction has 12230 states and 39011 transitions. [2021-06-05 13:46:54,564 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 13:46:54,564 INFO L276 IsEmpty]: Start isEmpty. Operand 12230 states and 39011 transitions. [2021-06-05 13:46:54,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:54,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:54,580 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:54,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable654,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:54,780 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:54,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:54,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1613010093, now seen corresponding path program 362 times [2021-06-05 13:46:54,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:54,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577604251] [2021-06-05 13:46:54,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:54,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:54,830 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 13:46:54,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:54,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577604251] [2021-06-05 13:46:54,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577604251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:54,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826078274] [2021-06-05 13:46:54,831 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 13:46:54,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:54,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:54,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:54,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:54,983 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 13:46:54,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826078274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:54,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:54,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-06-05 13:46:54,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320108089] [2021-06-05 13:46:54,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:46:54,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:54,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:46:54,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:46:54,984 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 13:46:55,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:55,942 INFO L93 Difference]: Finished difference Result 14528 states and 45137 transitions. [2021-06-05 13:46:55,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 13:46:55,943 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 13:46:55,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:55,965 INFO L225 Difference]: With dead ends: 14528 [2021-06-05 13:46:55,965 INFO L226 Difference]: Without dead ends: 14512 [2021-06-05 13:46:55,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3124 ImplicationChecksByTransitivity, 825.9ms TimeCoverageRelationStatistics Valid=2232, Invalid=6510, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 13:46:55,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14512 states. [2021-06-05 13:46:56,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14512 to 13019. [2021-06-05 13:46:56,157 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 13:46:56,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13019 states to 13019 states and 41627 transitions. [2021-06-05 13:46:56,185 INFO L78 Accepts]: Start accepts. Automaton has 13019 states and 41627 transitions. Word has length 24 [2021-06-05 13:46:56,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:56,185 INFO L482 AbstractCegarLoop]: Abstraction has 13019 states and 41627 transitions. [2021-06-05 13:46:56,185 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 13:46:56,185 INFO L276 IsEmpty]: Start isEmpty. Operand 13019 states and 41627 transitions. [2021-06-05 13:46:56,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:56,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:56,203 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:56,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable655 [2021-06-05 13:46:56,404 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:56,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:56,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1840231473, now seen corresponding path program 363 times [2021-06-05 13:46:56,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:56,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907639232] [2021-06-05 13:46:56,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:56,460 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 13:46:56,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:56,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907639232] [2021-06-05 13:46:56,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907639232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:56,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035004857] [2021-06-05 13:46:56,461 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 13:46:56,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:46:56,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:56,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:56,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:56,616 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 13:46:56,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035004857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:56,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:56,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-06-05 13:46:56,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063707572] [2021-06-05 13:46:56,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:46:56,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:56,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:46:56,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:46:56,617 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 13:46:57,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:57,519 INFO L93 Difference]: Finished difference Result 15354 states and 47888 transitions. [2021-06-05 13:46:57,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 13:46:57,519 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 13:46:57,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:57,543 INFO L225 Difference]: With dead ends: 15354 [2021-06-05 13:46:57,543 INFO L226 Difference]: Without dead ends: 15334 [2021-06-05 13:46:57,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 818.9ms TimeCoverageRelationStatistics Valid=2019, Invalid=5991, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 13:46:57,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15334 states. [2021-06-05 13:46:57,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15334 to 13814. [2021-06-05 13:46:57,744 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 13:46:57,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13814 states to 13814 states and 44278 transitions. [2021-06-05 13:46:57,772 INFO L78 Accepts]: Start accepts. Automaton has 13814 states and 44278 transitions. Word has length 24 [2021-06-05 13:46:57,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:57,772 INFO L482 AbstractCegarLoop]: Abstraction has 13814 states and 44278 transitions. [2021-06-05 13:46:57,772 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 13:46:57,773 INFO L276 IsEmpty]: Start isEmpty. Operand 13814 states and 44278 transitions. [2021-06-05 13:46:57,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:57,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:57,792 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:57,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable656,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:57,993 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:57,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:57,993 INFO L82 PathProgramCache]: Analyzing trace with hash -294159661, now seen corresponding path program 364 times [2021-06-05 13:46:57,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:57,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586950350] [2021-06-05 13:46:57,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:57,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:58,057 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 13:46:58,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:58,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586950350] [2021-06-05 13:46:58,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586950350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:58,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465478540] [2021-06-05 13:46:58,057 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 13:46:58,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:58,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:58,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:58,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:58,219 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 13:46:58,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465478540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:58,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:58,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 13:46:58,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853496071] [2021-06-05 13:46:58,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 13:46:58,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:58,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 13:46:58,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:46:58,220 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 13:46:58,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:58,987 INFO L93 Difference]: Finished difference Result 15273 states and 47830 transitions. [2021-06-05 13:46:58,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 13:46:58,988 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 13:46:58,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:59,009 INFO L225 Difference]: With dead ends: 15273 [2021-06-05 13:46:59,009 INFO L226 Difference]: Without dead ends: 15249 [2021-06-05 13:46:59,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2434 ImplicationChecksByTransitivity, 704.4ms TimeCoverageRelationStatistics Valid=1912, Invalid=5570, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 13:46:59,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15249 states. [2021-06-05 13:46:59,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15249 to 13872. [2021-06-05 13:46:59,208 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 13:46:59,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13872 states to 13872 states and 44460 transitions. [2021-06-05 13:46:59,236 INFO L78 Accepts]: Start accepts. Automaton has 13872 states and 44460 transitions. Word has length 24 [2021-06-05 13:46:59,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:59,236 INFO L482 AbstractCegarLoop]: Abstraction has 13872 states and 44460 transitions. [2021-06-05 13:46:59,236 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 13:46:59,236 INFO L276 IsEmpty]: Start isEmpty. Operand 13872 states and 44460 transitions. [2021-06-05 13:46:59,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:46:59,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:59,253 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:59,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-06-05 13:46:59,453 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:59,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:59,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1105251501, now seen corresponding path program 365 times [2021-06-05 13:46:59,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:59,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853202065] [2021-06-05 13:46:59,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:59,512 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 13:46:59,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:59,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853202065] [2021-06-05 13:46:59,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853202065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:59,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587578322] [2021-06-05 13:46:59,513 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 13:46:59,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:46:59,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:59,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:46:59,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:59,612 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 13:46:59,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587578322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:59,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:59,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-05 13:46:59,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722640784] [2021-06-05 13:46:59,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:46:59,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:59,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:46:59,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:46:59,613 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 13:46:59,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:59,777 INFO L93 Difference]: Finished difference Result 16092 states and 50859 transitions. [2021-06-05 13:46:59,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:46:59,777 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 13:46:59,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:59,801 INFO L225 Difference]: With dead ends: 16092 [2021-06-05 13:46:59,801 INFO L226 Difference]: Without dead ends: 16092 [2021-06-05 13:46:59,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 136.3ms TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:46:59,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16092 states. [2021-06-05 13:47:00,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16092 to 13964. [2021-06-05 13:47:00,038 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 13:47:00,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13964 states to 13964 states and 44739 transitions. [2021-06-05 13:47:00,063 INFO L78 Accepts]: Start accepts. Automaton has 13964 states and 44739 transitions. Word has length 24 [2021-06-05 13:47:00,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:00,063 INFO L482 AbstractCegarLoop]: Abstraction has 13964 states and 44739 transitions. [2021-06-05 13:47:00,063 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 13:47:00,063 INFO L276 IsEmpty]: Start isEmpty. Operand 13964 states and 44739 transitions. [2021-06-05 13:47:00,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:00,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:00,079 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:00,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable658,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:00,279 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:00,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:00,280 INFO L82 PathProgramCache]: Analyzing trace with hash -299012217, now seen corresponding path program 366 times [2021-06-05 13:47:00,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:00,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185330677] [2021-06-05 13:47:00,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:00,339 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 13:47:00,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:00,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185330677] [2021-06-05 13:47:00,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185330677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:00,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469812486] [2021-06-05 13:47:00,339 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 13:47:00,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:47:00,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:00,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:00,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:00,448 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 13:47:00,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469812486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:00,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:00,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 13:47:00,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058579670] [2021-06-05 13:47:00,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:00,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:00,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:00,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:00,449 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 13:47:00,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:00,676 INFO L93 Difference]: Finished difference Result 14987 states and 47521 transitions. [2021-06-05 13:47:00,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:47:00,676 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 13:47:00,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:00,694 INFO L225 Difference]: With dead ends: 14987 [2021-06-05 13:47:00,694 INFO L226 Difference]: Without dead ends: 14987 [2021-06-05 13:47:00,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 196.5ms TimeCoverageRelationStatistics Valid=418, Invalid=842, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 13:47:00,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14987 states. [2021-06-05 13:47:00,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14987 to 14007. [2021-06-05 13:47:00,883 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 13:47:00,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14007 states to 14007 states and 44868 transitions. [2021-06-05 13:47:00,910 INFO L78 Accepts]: Start accepts. Automaton has 14007 states and 44868 transitions. Word has length 24 [2021-06-05 13:47:00,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:00,911 INFO L482 AbstractCegarLoop]: Abstraction has 14007 states and 44868 transitions. [2021-06-05 13:47:00,911 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 13:47:00,911 INFO L276 IsEmpty]: Start isEmpty. Operand 14007 states and 44868 transitions. [2021-06-05 13:47:00,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:00,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:00,930 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:01,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable659,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:01,130 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:01,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:01,130 INFO L82 PathProgramCache]: Analyzing trace with hash 549610255, now seen corresponding path program 367 times [2021-06-05 13:47:01,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:01,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282251772] [2021-06-05 13:47:01,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:01,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:01,188 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 13:47:01,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:01,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282251772] [2021-06-05 13:47:01,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282251772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:01,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264650347] [2021-06-05 13:47:01,188 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 13:47:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:01,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:01,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:01,297 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 13:47:01,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264650347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:01,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:01,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 13:47:01,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084015727] [2021-06-05 13:47:01,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:01,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:01,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:01,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:01,298 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 13:47:01,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:01,686 INFO L93 Difference]: Finished difference Result 15501 states and 48982 transitions. [2021-06-05 13:47:01,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 13:47:01,686 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 13:47:01,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:01,707 INFO L225 Difference]: With dead ends: 15501 [2021-06-05 13:47:01,707 INFO L226 Difference]: Without dead ends: 15501 [2021-06-05 13:47:01,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 293.7ms TimeCoverageRelationStatistics Valid=677, Invalid=1393, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 13:47:01,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15501 states. [2021-06-05 13:47:01,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15501 to 14056. [2021-06-05 13:47:01,886 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 13:47:01,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14056 states to 14056 states and 45015 transitions. [2021-06-05 13:47:01,915 INFO L78 Accepts]: Start accepts. Automaton has 14056 states and 45015 transitions. Word has length 24 [2021-06-05 13:47:01,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:01,915 INFO L482 AbstractCegarLoop]: Abstraction has 14056 states and 45015 transitions. [2021-06-05 13:47:01,915 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 13:47:01,915 INFO L276 IsEmpty]: Start isEmpty. Operand 14056 states and 45015 transitions. [2021-06-05 13:47:01,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:01,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:01,932 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:02,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable660 [2021-06-05 13:47:02,133 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:02,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:02,133 INFO L82 PathProgramCache]: Analyzing trace with hash -2055414137, now seen corresponding path program 368 times [2021-06-05 13:47:02,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:02,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437679625] [2021-06-05 13:47:02,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:02,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:02,190 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 13:47:02,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:02,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437679625] [2021-06-05 13:47:02,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437679625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:02,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058920064] [2021-06-05 13:47:02,190 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 13:47:02,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:02,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:02,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:02,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:02,301 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 13:47:02,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058920064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:02,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:02,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 13:47:02,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447396991] [2021-06-05 13:47:02,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:02,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:02,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:02,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:02,302 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 13:47:02,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:02,906 INFO L93 Difference]: Finished difference Result 15602 states and 49176 transitions. [2021-06-05 13:47:02,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 13:47:02,907 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 13:47:02,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:02,977 INFO L225 Difference]: With dead ends: 15602 [2021-06-05 13:47:02,977 INFO L226 Difference]: Without dead ends: 15602 [2021-06-05 13:47:02,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 443.7ms TimeCoverageRelationStatistics Valid=1179, Invalid=2361, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 13:47:02,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15602 states. [2021-06-05 13:47:03,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15602 to 14172. [2021-06-05 13:47:03,136 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 13:47:03,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14172 states to 14172 states and 45363 transitions. [2021-06-05 13:47:03,162 INFO L78 Accepts]: Start accepts. Automaton has 14172 states and 45363 transitions. Word has length 24 [2021-06-05 13:47:03,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:03,162 INFO L482 AbstractCegarLoop]: Abstraction has 14172 states and 45363 transitions. [2021-06-05 13:47:03,162 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 13:47:03,162 INFO L276 IsEmpty]: Start isEmpty. Operand 14172 states and 45363 transitions. [2021-06-05 13:47:03,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:03,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:03,178 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:03,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2021-06-05 13:47:03,389 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:03,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:03,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1169615857, now seen corresponding path program 369 times [2021-06-05 13:47:03,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:03,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608354834] [2021-06-05 13:47:03,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:03,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:03,464 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 13:47:03,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:03,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608354834] [2021-06-05 13:47:03,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608354834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:03,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281840671] [2021-06-05 13:47:03,465 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 13:47:03,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:47:03,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:03,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:03,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:03,580 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 13:47:03,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281840671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:03,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:03,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 13:47:03,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945286511] [2021-06-05 13:47:03,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:03,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:03,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:03,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:03,581 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 13:47:04,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:04,414 INFO L93 Difference]: Finished difference Result 15707 states and 49378 transitions. [2021-06-05 13:47:04,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 13:47:04,414 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 13:47:04,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:04,436 INFO L225 Difference]: With dead ends: 15707 [2021-06-05 13:47:04,436 INFO L226 Difference]: Without dead ends: 15707 [2021-06-05 13:47:04,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 617.8ms TimeCoverageRelationStatistics Valid=1756, Invalid=3500, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 13:47:04,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15707 states. [2021-06-05 13:47:04,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15707 to 14281. [2021-06-05 13:47:04,636 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 13:47:04,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14281 states to 14281 states and 45692 transitions. [2021-06-05 13:47:04,665 INFO L78 Accepts]: Start accepts. Automaton has 14281 states and 45692 transitions. Word has length 24 [2021-06-05 13:47:04,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:04,665 INFO L482 AbstractCegarLoop]: Abstraction has 14281 states and 45692 transitions. [2021-06-05 13:47:04,665 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 13:47:04,665 INFO L276 IsEmpty]: Start isEmpty. Operand 14281 states and 45692 transitions. [2021-06-05 13:47:04,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:04,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:04,684 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:04,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable662 [2021-06-05 13:47:04,885 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:04,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:04,888 INFO L82 PathProgramCache]: Analyzing trace with hash 937168263, now seen corresponding path program 370 times [2021-06-05 13:47:04,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:04,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42445403] [2021-06-05 13:47:04,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:04,946 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 13:47:04,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:04,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42445403] [2021-06-05 13:47:04,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42445403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:04,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058976349] [2021-06-05 13:47:04,947 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 13:47:04,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:04,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:04,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:04,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:05,064 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 13:47:05,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058976349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:05,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:05,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 13:47:05,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854300093] [2021-06-05 13:47:05,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:05,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:05,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:05,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:05,065 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 13:47:05,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:05,938 INFO L93 Difference]: Finished difference Result 15913 states and 49910 transitions. [2021-06-05 13:47:05,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 13:47:05,939 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 13:47:05,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:05,962 INFO L225 Difference]: With dead ends: 15913 [2021-06-05 13:47:05,962 INFO L226 Difference]: Without dead ends: 15913 [2021-06-05 13:47:05,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 680.8ms TimeCoverageRelationStatistics Valid=2091, Invalid=4071, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 13:47:05,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15913 states. [2021-06-05 13:47:06,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15913 to 14413. [2021-06-05 13:47:06,193 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 13:47:06,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14413 states to 14413 states and 46106 transitions. [2021-06-05 13:47:06,223 INFO L78 Accepts]: Start accepts. Automaton has 14413 states and 46106 transitions. Word has length 24 [2021-06-05 13:47:06,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:06,223 INFO L482 AbstractCegarLoop]: Abstraction has 14413 states and 46106 transitions. [2021-06-05 13:47:06,223 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 13:47:06,223 INFO L276 IsEmpty]: Start isEmpty. Operand 14413 states and 46106 transitions. [2021-06-05 13:47:06,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:06,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:06,242 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:06,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable663 [2021-06-05 13:47:06,443 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:06,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:06,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1211628273, now seen corresponding path program 371 times [2021-06-05 13:47:06,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:06,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233244667] [2021-06-05 13:47:06,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:06,501 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 13:47:06,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:06,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233244667] [2021-06-05 13:47:06,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233244667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:06,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959055311] [2021-06-05 13:47:06,501 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 13:47:06,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:47:06,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:06,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:06,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:06,615 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 13:47:06,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959055311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:06,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:06,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 13:47:06,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112044926] [2021-06-05 13:47:06,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:06,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:06,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:06,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:06,616 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 13:47:07,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:07,565 INFO L93 Difference]: Finished difference Result 16226 states and 50863 transitions. [2021-06-05 13:47:07,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 13:47:07,566 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 13:47:07,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:07,589 INFO L225 Difference]: With dead ends: 16226 [2021-06-05 13:47:07,589 INFO L226 Difference]: Without dead ends: 16226 [2021-06-05 13:47:07,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 693.4ms TimeCoverageRelationStatistics Valid=2135, Invalid=3871, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 13:47:07,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16226 states. [2021-06-05 13:47:07,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16226 to 14455. [2021-06-05 13:47:07,791 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 13:47:07,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14455 states to 14455 states and 46320 transitions. [2021-06-05 13:47:07,817 INFO L78 Accepts]: Start accepts. Automaton has 14455 states and 46320 transitions. Word has length 24 [2021-06-05 13:47:07,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:07,817 INFO L482 AbstractCegarLoop]: Abstraction has 14455 states and 46320 transitions. [2021-06-05 13:47:07,817 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 13:47:07,817 INFO L276 IsEmpty]: Start isEmpty. Operand 14455 states and 46320 transitions. [2021-06-05 13:47:07,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:07,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:07,834 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:08,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-06-05 13:47:08,034 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:08,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:08,034 INFO L82 PathProgramCache]: Analyzing trace with hash -640173467, now seen corresponding path program 372 times [2021-06-05 13:47:08,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:08,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562610014] [2021-06-05 13:47:08,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:08,093 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 13:47:08,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:08,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562610014] [2021-06-05 13:47:08,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562610014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:08,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194874215] [2021-06-05 13:47:08,093 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 13:47:08,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:47:08,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:08,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:08,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:08,210 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 13:47:08,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194874215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:08,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:08,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 13:47:08,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31272129] [2021-06-05 13:47:08,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:08,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:08,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:08,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:08,211 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 13:47:09,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:09,062 INFO L93 Difference]: Finished difference Result 15474 states and 48762 transitions. [2021-06-05 13:47:09,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 13:47:09,062 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 13:47:09,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:09,082 INFO L225 Difference]: With dead ends: 15474 [2021-06-05 13:47:09,082 INFO L226 Difference]: Without dead ends: 15468 [2021-06-05 13:47:09,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 677.8ms TimeCoverageRelationStatistics Valid=2587, Invalid=4895, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 13:47:09,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15468 states. [2021-06-05 13:47:09,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15468 to 13787. [2021-06-05 13:47:09,308 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 13:47:09,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13787 states to 13787 states and 44098 transitions. [2021-06-05 13:47:09,336 INFO L78 Accepts]: Start accepts. Automaton has 13787 states and 44098 transitions. Word has length 24 [2021-06-05 13:47:09,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:09,336 INFO L482 AbstractCegarLoop]: Abstraction has 13787 states and 44098 transitions. [2021-06-05 13:47:09,336 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 13:47:09,336 INFO L276 IsEmpty]: Start isEmpty. Operand 13787 states and 44098 transitions. [2021-06-05 13:47:09,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:09,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:09,355 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:09,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable665 [2021-06-05 13:47:09,555 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:09,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:09,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1723222283, now seen corresponding path program 373 times [2021-06-05 13:47:09,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:09,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390900778] [2021-06-05 13:47:09,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:09,615 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 13:47:09,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:09,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390900778] [2021-06-05 13:47:09,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390900778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:09,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778186253] [2021-06-05 13:47:09,615 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 13:47:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:09,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:09,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:09,739 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 13:47:09,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778186253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:09,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:09,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 13:47:09,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620405997] [2021-06-05 13:47:09,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:09,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:09,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:09,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:09,739 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 13:47:10,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:10,442 INFO L93 Difference]: Finished difference Result 17863 states and 56145 transitions. [2021-06-05 13:47:10,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 13:47:10,442 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 13:47:10,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:10,465 INFO L225 Difference]: With dead ends: 17863 [2021-06-05 13:47:10,465 INFO L226 Difference]: Without dead ends: 17848 [2021-06-05 13:47:10,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 575.4ms TimeCoverageRelationStatistics Valid=1502, Invalid=3190, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 13:47:10,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17848 states. [2021-06-05 13:47:10,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17848 to 15969. [2021-06-05 13:47:10,700 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 13:47:10,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15969 states to 15969 states and 51283 transitions. [2021-06-05 13:47:10,733 INFO L78 Accepts]: Start accepts. Automaton has 15969 states and 51283 transitions. Word has length 24 [2021-06-05 13:47:10,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:10,734 INFO L482 AbstractCegarLoop]: Abstraction has 15969 states and 51283 transitions. [2021-06-05 13:47:10,734 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 13:47:10,734 INFO L276 IsEmpty]: Start isEmpty. Operand 15969 states and 51283 transitions. [2021-06-05 13:47:10,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:10,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:10,753 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:10,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-06-05 13:47:10,954 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:10,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:10,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1258631179, now seen corresponding path program 374 times [2021-06-05 13:47:10,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:10,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570929485] [2021-06-05 13:47:10,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:11,013 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 13:47:11,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:11,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570929485] [2021-06-05 13:47:11,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570929485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:11,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398632220] [2021-06-05 13:47:11,013 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 13:47:11,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:11,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:11,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:11,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:11,137 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 13:47:11,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398632220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:11,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:11,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 13:47:11,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031032737] [2021-06-05 13:47:11,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:11,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:11,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:11,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:11,138 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 13:47:11,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:11,883 INFO L93 Difference]: Finished difference Result 17633 states and 55417 transitions. [2021-06-05 13:47:11,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 13:47:11,883 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 13:47:11,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:11,910 INFO L225 Difference]: With dead ends: 17633 [2021-06-05 13:47:11,910 INFO L226 Difference]: Without dead ends: 17629 [2021-06-05 13:47:11,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 589.3ms TimeCoverageRelationStatistics Valid=1386, Invalid=4314, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 13:47:11,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17629 states. [2021-06-05 13:47:12,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17629 to 15243. [2021-06-05 13:47:12,174 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 13:47:12,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15243 states to 15243 states and 48704 transitions. [2021-06-05 13:47:12,206 INFO L78 Accepts]: Start accepts. Automaton has 15243 states and 48704 transitions. Word has length 24 [2021-06-05 13:47:12,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:12,206 INFO L482 AbstractCegarLoop]: Abstraction has 15243 states and 48704 transitions. [2021-06-05 13:47:12,206 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 13:47:12,206 INFO L276 IsEmpty]: Start isEmpty. Operand 15243 states and 48704 transitions. [2021-06-05 13:47:12,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:12,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:12,226 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:12,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable667 [2021-06-05 13:47:12,426 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:12,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:12,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1225031951, now seen corresponding path program 375 times [2021-06-05 13:47:12,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:12,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655233462] [2021-06-05 13:47:12,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:12,484 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 13:47:12,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:12,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655233462] [2021-06-05 13:47:12,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655233462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:12,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352256826] [2021-06-05 13:47:12,485 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 13:47:12,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:47:12,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:12,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:12,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:12,610 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 13:47:12,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352256826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:12,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:12,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 13:47:12,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677194254] [2021-06-05 13:47:12,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:12,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:12,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:12,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:12,611 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 13:47:13,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:13,275 INFO L93 Difference]: Finished difference Result 17307 states and 54169 transitions. [2021-06-05 13:47:13,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 13:47:13,275 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 13:47:13,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:13,302 INFO L225 Difference]: With dead ends: 17307 [2021-06-05 13:47:13,302 INFO L226 Difference]: Without dead ends: 17299 [2021-06-05 13:47:13,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 533.5ms TimeCoverageRelationStatistics Valid=1185, Invalid=3927, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 13:47:13,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17299 states. [2021-06-05 13:47:13,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17299 to 15525. [2021-06-05 13:47:13,531 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 13:47:13,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15525 states to 15525 states and 49591 transitions. [2021-06-05 13:47:13,565 INFO L78 Accepts]: Start accepts. Automaton has 15525 states and 49591 transitions. Word has length 24 [2021-06-05 13:47:13,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:13,565 INFO L482 AbstractCegarLoop]: Abstraction has 15525 states and 49591 transitions. [2021-06-05 13:47:13,565 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 13:47:13,566 INFO L276 IsEmpty]: Start isEmpty. Operand 15525 states and 49591 transitions. [2021-06-05 13:47:13,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:13,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:13,586 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:13,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable668,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:13,787 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:13,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:13,787 INFO L82 PathProgramCache]: Analyzing trace with hash 183455883, now seen corresponding path program 376 times [2021-06-05 13:47:13,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:13,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133181472] [2021-06-05 13:47:13,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:13,844 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 13:47:13,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:13,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133181472] [2021-06-05 13:47:13,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133181472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:13,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972836241] [2021-06-05 13:47:13,844 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 13:47:13,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:13,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:13,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:13,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:13,965 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 13:47:13,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972836241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:13,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:13,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 13:47:13,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859844584] [2021-06-05 13:47:13,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:13,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:13,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:13,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:13,966 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 13:47:14,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:14,601 INFO L93 Difference]: Finished difference Result 17843 states and 55959 transitions. [2021-06-05 13:47:14,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 13:47:14,602 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 13:47:14,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:14,630 INFO L225 Difference]: With dead ends: 17843 [2021-06-05 13:47:14,630 INFO L226 Difference]: Without dead ends: 17831 [2021-06-05 13:47:14,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 500.6ms TimeCoverageRelationStatistics Valid=1016, Invalid=3540, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 13:47:14,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17831 states. [2021-06-05 13:47:14,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17831 to 15785. [2021-06-05 13:47:14,908 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 13:47:14,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15785 states to 15785 states and 50393 transitions. [2021-06-05 13:47:14,944 INFO L78 Accepts]: Start accepts. Automaton has 15785 states and 50393 transitions. Word has length 24 [2021-06-05 13:47:14,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:14,944 INFO L482 AbstractCegarLoop]: Abstraction has 15785 states and 50393 transitions. [2021-06-05 13:47:14,944 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 13:47:14,944 INFO L276 IsEmpty]: Start isEmpty. Operand 15785 states and 50393 transitions. [2021-06-05 13:47:14,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:14,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:14,964 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:15,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:15,165 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:15,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:15,165 INFO L82 PathProgramCache]: Analyzing trace with hash -2040631153, now seen corresponding path program 377 times [2021-06-05 13:47:15,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:15,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453761290] [2021-06-05 13:47:15,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:15,223 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 13:47:15,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:15,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453761290] [2021-06-05 13:47:15,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453761290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:15,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891492346] [2021-06-05 13:47:15,223 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 13:47:15,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:47:15,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:15,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:15,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:15,344 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 13:47:15,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891492346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:15,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:15,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 13:47:15,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168493217] [2021-06-05 13:47:15,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:15,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:15,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:15,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:15,345 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 13:47:15,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:15,902 INFO L93 Difference]: Finished difference Result 18546 states and 58331 transitions. [2021-06-05 13:47:15,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 13:47:15,903 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 13:47:15,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:15,932 INFO L225 Difference]: With dead ends: 18546 [2021-06-05 13:47:15,932 INFO L226 Difference]: Without dead ends: 18530 [2021-06-05 13:47:15,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 460.4ms TimeCoverageRelationStatistics Valid=880, Invalid=3152, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 13:47:15,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18530 states. [2021-06-05 13:47:16,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18530 to 15941. [2021-06-05 13:47:16,173 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 13:47:16,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15941 states to 15941 states and 50830 transitions. [2021-06-05 13:47:16,208 INFO L78 Accepts]: Start accepts. Automaton has 15941 states and 50830 transitions. Word has length 24 [2021-06-05 13:47:16,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:16,208 INFO L482 AbstractCegarLoop]: Abstraction has 15941 states and 50830 transitions. [2021-06-05 13:47:16,208 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 13:47:16,208 INFO L276 IsEmpty]: Start isEmpty. Operand 15941 states and 50830 transitions. [2021-06-05 13:47:16,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:16,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:16,229 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:16,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable670,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:16,429 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:16,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:16,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2027114763, now seen corresponding path program 378 times [2021-06-05 13:47:16,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:16,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82607367] [2021-06-05 13:47:16,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:16,489 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 13:47:16,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:16,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82607367] [2021-06-05 13:47:16,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82607367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:16,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651471215] [2021-06-05 13:47:16,489 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 13:47:16,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:47:16,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:16,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:16,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:16,615 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 13:47:16,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651471215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:16,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:16,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 13:47:16,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826502299] [2021-06-05 13:47:16,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:16,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:16,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:16,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:16,615 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 13:47:17,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:17,119 INFO L93 Difference]: Finished difference Result 18841 states and 59191 transitions. [2021-06-05 13:47:17,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 13:47:17,120 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 13:47:17,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:17,146 INFO L225 Difference]: With dead ends: 18841 [2021-06-05 13:47:17,146 INFO L226 Difference]: Without dead ends: 18821 [2021-06-05 13:47:17,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 436.6ms TimeCoverageRelationStatistics Valid=778, Invalid=2762, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 13:47:17,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18821 states. [2021-06-05 13:47:17,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18821 to 15970. [2021-06-05 13:47:17,377 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 13:47:17,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15970 states to 15970 states and 50898 transitions. [2021-06-05 13:47:17,407 INFO L78 Accepts]: Start accepts. Automaton has 15970 states and 50898 transitions. Word has length 24 [2021-06-05 13:47:17,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:17,407 INFO L482 AbstractCegarLoop]: Abstraction has 15970 states and 50898 transitions. [2021-06-05 13:47:17,407 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 13:47:17,407 INFO L276 IsEmpty]: Start isEmpty. Operand 15970 states and 50898 transitions. [2021-06-05 13:47:17,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:17,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:17,426 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:17,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:17,627 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:17,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:17,627 INFO L82 PathProgramCache]: Analyzing trace with hash -721780721, now seen corresponding path program 379 times [2021-06-05 13:47:17,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:17,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524376713] [2021-06-05 13:47:17,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:17,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:17,687 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 13:47:17,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:17,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524376713] [2021-06-05 13:47:17,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524376713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:17,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051605565] [2021-06-05 13:47:17,687 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 13:47:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:17,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:17,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:17,892 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 13:47:17,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051605565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:17,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:17,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 13:47:17,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087256547] [2021-06-05 13:47:17,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:17,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:17,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:17,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:17,893 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 13:47:18,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:18,262 INFO L93 Difference]: Finished difference Result 17288 states and 54299 transitions. [2021-06-05 13:47:18,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 13:47:18,262 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 13:47:18,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:18,286 INFO L225 Difference]: With dead ends: 17288 [2021-06-05 13:47:18,286 INFO L226 Difference]: Without dead ends: 17276 [2021-06-05 13:47:18,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 350.2ms TimeCoverageRelationStatistics Valid=591, Invalid=1959, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 13:47:18,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17276 states. [2021-06-05 13:47:18,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17276 to 15970. [2021-06-05 13:47:18,502 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 13:47:18,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15970 states to 15970 states and 50892 transitions. [2021-06-05 13:47:18,535 INFO L78 Accepts]: Start accepts. Automaton has 15970 states and 50892 transitions. Word has length 24 [2021-06-05 13:47:18,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:18,535 INFO L482 AbstractCegarLoop]: Abstraction has 15970 states and 50892 transitions. [2021-06-05 13:47:18,535 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 13:47:18,535 INFO L276 IsEmpty]: Start isEmpty. Operand 15970 states and 50892 transitions. [2021-06-05 13:47:18,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:18,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:18,553 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:18,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-06-05 13:47:18,754 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:18,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:18,754 INFO L82 PathProgramCache]: Analyzing trace with hash -731252469, now seen corresponding path program 380 times [2021-06-05 13:47:18,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:18,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492759744] [2021-06-05 13:47:18,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:18,814 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 13:47:18,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:18,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492759744] [2021-06-05 13:47:18,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492759744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:18,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7261080] [2021-06-05 13:47:18,815 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 13:47:18,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:18,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:18,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:18,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:18,930 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 13:47:18,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7261080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:18,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:18,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-05 13:47:18,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936649303] [2021-06-05 13:47:18,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:47:18,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:18,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:47:18,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:47:18,930 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 13:47:19,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:19,089 INFO L93 Difference]: Finished difference Result 17070 states and 53913 transitions. [2021-06-05 13:47:19,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:47:19,090 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 13:47:19,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:19,112 INFO L225 Difference]: With dead ends: 17070 [2021-06-05 13:47:19,112 INFO L226 Difference]: Without dead ends: 17056 [2021-06-05 13:47:19,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 182.3ms TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:47:19,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17056 states. [2021-06-05 13:47:19,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17056 to 15970. [2021-06-05 13:47:19,322 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 13:47:19,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15970 states to 15970 states and 50891 transitions. [2021-06-05 13:47:19,354 INFO L78 Accepts]: Start accepts. Automaton has 15970 states and 50891 transitions. Word has length 24 [2021-06-05 13:47:19,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:19,355 INFO L482 AbstractCegarLoop]: Abstraction has 15970 states and 50891 transitions. [2021-06-05 13:47:19,355 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 13:47:19,355 INFO L276 IsEmpty]: Start isEmpty. Operand 15970 states and 50891 transitions. [2021-06-05 13:47:19,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:19,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:19,375 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:19,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2021-06-05 13:47:19,575 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:19,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:19,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1075398189, now seen corresponding path program 381 times [2021-06-05 13:47:19,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:19,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356696484] [2021-06-05 13:47:19,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:19,641 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 13:47:19,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:19,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356696484] [2021-06-05 13:47:19,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356696484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:19,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705060945] [2021-06-05 13:47:19,641 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 13:47:19,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:47:19,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:19,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:19,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:19,764 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 13:47:19,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705060945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:19,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:19,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 13:47:19,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659721143] [2021-06-05 13:47:19,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:47:19,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:19,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:47:19,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:47:19,765 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 13:47:20,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:20,340 INFO L93 Difference]: Finished difference Result 17305 states and 54554 transitions. [2021-06-05 13:47:20,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 13:47:20,341 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 13:47:20,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:20,367 INFO L225 Difference]: With dead ends: 17305 [2021-06-05 13:47:20,367 INFO L226 Difference]: Without dead ends: 17305 [2021-06-05 13:47:20,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 466.4ms TimeCoverageRelationStatistics Valid=1224, Invalid=2558, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 13:47:20,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17305 states. [2021-06-05 13:47:20,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17305 to 16020. [2021-06-05 13:47:20,641 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 13:47:20,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16020 states to 16020 states and 51041 transitions. [2021-06-05 13:47:20,673 INFO L78 Accepts]: Start accepts. Automaton has 16020 states and 51041 transitions. Word has length 24 [2021-06-05 13:47:20,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:20,673 INFO L482 AbstractCegarLoop]: Abstraction has 16020 states and 51041 transitions. [2021-06-05 13:47:20,673 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 13:47:20,673 INFO L276 IsEmpty]: Start isEmpty. Operand 16020 states and 51041 transitions. [2021-06-05 13:47:20,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:20,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:20,692 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:20,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable674,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:20,893 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:20,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:20,893 INFO L82 PathProgramCache]: Analyzing trace with hash 310717139, now seen corresponding path program 382 times [2021-06-05 13:47:20,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:20,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360893577] [2021-06-05 13:47:20,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:20,951 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 13:47:20,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:20,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360893577] [2021-06-05 13:47:20,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360893577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:20,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810918463] [2021-06-05 13:47:20,951 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 13:47:20,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:20,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:20,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:20,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:21,072 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 13:47:21,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810918463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:21,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:21,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 13:47:21,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946713225] [2021-06-05 13:47:21,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:21,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:21,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:21,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:21,073 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 13:47:21,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:21,612 INFO L93 Difference]: Finished difference Result 17722 states and 55602 transitions. [2021-06-05 13:47:21,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 13:47:21,612 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 13:47:21,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:21,638 INFO L225 Difference]: With dead ends: 17722 [2021-06-05 13:47:21,638 INFO L226 Difference]: Without dead ends: 17708 [2021-06-05 13:47:21,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 397.6ms TimeCoverageRelationStatistics Valid=944, Invalid=2026, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 13:47:21,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17708 states. [2021-06-05 13:47:21,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17708 to 16053. [2021-06-05 13:47:21,864 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 13:47:21,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16053 states to 16053 states and 51138 transitions. [2021-06-05 13:47:21,898 INFO L78 Accepts]: Start accepts. Automaton has 16053 states and 51138 transitions. Word has length 24 [2021-06-05 13:47:21,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:21,898 INFO L482 AbstractCegarLoop]: Abstraction has 16053 states and 51138 transitions. [2021-06-05 13:47:21,898 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 13:47:21,898 INFO L276 IsEmpty]: Start isEmpty. Operand 16053 states and 51138 transitions. [2021-06-05 13:47:21,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:21,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:21,917 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:22,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-06-05 13:47:22,118 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:22,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:22,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1445684781, now seen corresponding path program 383 times [2021-06-05 13:47:22,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:22,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390354911] [2021-06-05 13:47:22,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:22,197 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 13:47:22,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:22,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390354911] [2021-06-05 13:47:22,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390354911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:22,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059106177] [2021-06-05 13:47:22,197 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 13:47:22,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:47:22,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:22,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:22,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:22,321 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 13:47:22,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059106177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:22,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:22,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 13:47:22,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937936302] [2021-06-05 13:47:22,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:22,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:22,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:22,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:22,322 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 13:47:22,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:22,831 INFO L93 Difference]: Finished difference Result 17524 states and 54984 transitions. [2021-06-05 13:47:22,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 13:47:22,831 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 13:47:22,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:22,857 INFO L225 Difference]: With dead ends: 17524 [2021-06-05 13:47:22,858 INFO L226 Difference]: Without dead ends: 17506 [2021-06-05 13:47:22,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 407.6ms TimeCoverageRelationStatistics Valid=862, Invalid=1894, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 13:47:22,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17506 states. [2021-06-05 13:47:23,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17506 to 16094. [2021-06-05 13:47:23,105 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 13:47:23,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16094 states to 16094 states and 51253 transitions. [2021-06-05 13:47:23,231 INFO L78 Accepts]: Start accepts. Automaton has 16094 states and 51253 transitions. Word has length 24 [2021-06-05 13:47:23,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:23,231 INFO L482 AbstractCegarLoop]: Abstraction has 16094 states and 51253 transitions. [2021-06-05 13:47:23,231 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 13:47:23,231 INFO L276 IsEmpty]: Start isEmpty. Operand 16094 states and 51253 transitions. [2021-06-05 13:47:23,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:23,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:23,252 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:23,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable676,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:23,452 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:23,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:23,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1130056403, now seen corresponding path program 384 times [2021-06-05 13:47:23,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:23,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531711970] [2021-06-05 13:47:23,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:23,504 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 13:47:23,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:23,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531711970] [2021-06-05 13:47:23,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531711970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:23,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268926560] [2021-06-05 13:47:23,505 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 13:47:23,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:47:23,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:23,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:23,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:23,625 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 13:47:23,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268926560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:23,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:23,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 13:47:23,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522612311] [2021-06-05 13:47:23,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:23,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:23,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:23,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:23,626 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 13:47:24,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:24,371 INFO L93 Difference]: Finished difference Result 17741 states and 55478 transitions. [2021-06-05 13:47:24,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 13:47:24,371 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 13:47:24,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:24,398 INFO L225 Difference]: With dead ends: 17741 [2021-06-05 13:47:24,399 INFO L226 Difference]: Without dead ends: 17731 [2021-06-05 13:47:24,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 556.7ms TimeCoverageRelationStatistics Valid=1433, Invalid=2989, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 13:47:24,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17731 states. [2021-06-05 13:47:24,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17731 to 16203. [2021-06-05 13:47:24,637 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 13:47:24,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16203 states to 16203 states and 51567 transitions. [2021-06-05 13:47:24,670 INFO L78 Accepts]: Start accepts. Automaton has 16203 states and 51567 transitions. Word has length 24 [2021-06-05 13:47:24,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:24,670 INFO L482 AbstractCegarLoop]: Abstraction has 16203 states and 51567 transitions. [2021-06-05 13:47:24,670 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 13:47:24,670 INFO L276 IsEmpty]: Start isEmpty. Operand 16203 states and 51567 transitions. [2021-06-05 13:47:24,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:24,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:24,692 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:24,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable677 [2021-06-05 13:47:24,893 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:24,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:24,893 INFO L82 PathProgramCache]: Analyzing trace with hash -172328493, now seen corresponding path program 385 times [2021-06-05 13:47:24,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:24,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556746016] [2021-06-05 13:47:24,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:24,946 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 13:47:24,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:24,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556746016] [2021-06-05 13:47:24,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556746016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:24,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367625219] [2021-06-05 13:47:24,946 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 13:47:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:24,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:24,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:25,069 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 13:47:25,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367625219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:25,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:25,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 13:47:25,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514194504] [2021-06-05 13:47:25,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:25,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:25,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:25,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:25,070 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 13:47:25,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:25,962 INFO L93 Difference]: Finished difference Result 18351 states and 57209 transitions. [2021-06-05 13:47:25,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 13:47:25,962 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 13:47:25,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:25,989 INFO L225 Difference]: With dead ends: 18351 [2021-06-05 13:47:25,989 INFO L226 Difference]: Without dead ends: 18347 [2021-06-05 13:47:25,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 682.4ms TimeCoverageRelationStatistics Valid=1920, Invalid=3780, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 13:47:26,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18347 states. [2021-06-05 13:47:26,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18347 to 16270. [2021-06-05 13:47:26,299 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 13:47:26,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16270 states to 16270 states and 51741 transitions. [2021-06-05 13:47:26,340 INFO L78 Accepts]: Start accepts. Automaton has 16270 states and 51741 transitions. Word has length 24 [2021-06-05 13:47:26,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:26,340 INFO L482 AbstractCegarLoop]: Abstraction has 16270 states and 51741 transitions. [2021-06-05 13:47:26,340 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 13:47:26,340 INFO L276 IsEmpty]: Start isEmpty. Operand 16270 states and 51741 transitions. [2021-06-05 13:47:26,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:26,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:26,362 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:26,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable678,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:26,562 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:26,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:26,562 INFO L82 PathProgramCache]: Analyzing trace with hash -214340909, now seen corresponding path program 386 times [2021-06-05 13:47:26,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:26,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208392410] [2021-06-05 13:47:26,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:26,620 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 13:47:26,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:26,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208392410] [2021-06-05 13:47:26,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208392410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:26,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420167896] [2021-06-05 13:47:26,621 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 13:47:26,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:26,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:26,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:26,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:26,753 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 13:47:26,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420167896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:26,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:26,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 13:47:26,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004448526] [2021-06-05 13:47:26,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:26,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:26,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:26,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:26,754 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 13:47:27,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:27,686 INFO L93 Difference]: Finished difference Result 18812 states and 58615 transitions. [2021-06-05 13:47:27,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 13:47:27,686 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 13:47:27,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:27,715 INFO L225 Difference]: With dead ends: 18812 [2021-06-05 13:47:27,715 INFO L226 Difference]: Without dead ends: 18812 [2021-06-05 13:47:27,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 709.9ms TimeCoverageRelationStatistics Valid=2017, Invalid=3683, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 13:47:27,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18812 states. [2021-06-05 13:47:27,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18812 to 16419. [2021-06-05 13:47:27,968 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 13:47:28,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16419 states to 16419 states and 52348 transitions. [2021-06-05 13:47:28,002 INFO L78 Accepts]: Start accepts. Automaton has 16419 states and 52348 transitions. Word has length 24 [2021-06-05 13:47:28,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:28,002 INFO L482 AbstractCegarLoop]: Abstraction has 16419 states and 52348 transitions. [2021-06-05 13:47:28,002 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 13:47:28,002 INFO L276 IsEmpty]: Start isEmpty. Operand 16419 states and 52348 transitions. [2021-06-05 13:47:28,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:28,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:28,023 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:28,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable679 [2021-06-05 13:47:28,223 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:28,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:28,223 INFO L82 PathProgramCache]: Analyzing trace with hash 357113897, now seen corresponding path program 387 times [2021-06-05 13:47:28,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:28,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509629886] [2021-06-05 13:47:28,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:28,276 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 13:47:28,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:28,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509629886] [2021-06-05 13:47:28,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509629886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:28,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324615748] [2021-06-05 13:47:28,276 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 13:47:28,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:47:28,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:28,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:28,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:28,405 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 13:47:28,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324615748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:28,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:28,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 13:47:28,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95742338] [2021-06-05 13:47:28,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:28,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:28,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:28,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:28,406 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 13:47:29,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:29,360 INFO L93 Difference]: Finished difference Result 17894 states and 55882 transitions. [2021-06-05 13:47:29,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 13:47:29,361 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 13:47:29,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:29,388 INFO L225 Difference]: With dead ends: 17894 [2021-06-05 13:47:29,388 INFO L226 Difference]: Without dead ends: 17879 [2021-06-05 13:47:29,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1989 ImplicationChecksByTransitivity, 782.3ms TimeCoverageRelationStatistics Valid=2525, Invalid=5131, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 13:47:29,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17879 states. [2021-06-05 13:47:29,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17879 to 15868. [2021-06-05 13:47:29,628 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 13:47:29,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15868 states to 15868 states and 50463 transitions. [2021-06-05 13:47:29,665 INFO L78 Accepts]: Start accepts. Automaton has 15868 states and 50463 transitions. Word has length 24 [2021-06-05 13:47:29,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:29,665 INFO L482 AbstractCegarLoop]: Abstraction has 15868 states and 50463 transitions. [2021-06-05 13:47:29,665 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 13:47:29,665 INFO L276 IsEmpty]: Start isEmpty. Operand 15868 states and 50463 transitions. [2021-06-05 13:47:29,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:29,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:29,687 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:29,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:29,887 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:29,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:29,887 INFO L82 PathProgramCache]: Analyzing trace with hash 892343699, now seen corresponding path program 388 times [2021-06-05 13:47:29,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:29,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034363163] [2021-06-05 13:47:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:29,991 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 13:47:29,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:29,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034363163] [2021-06-05 13:47:29,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034363163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:29,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667433425] [2021-06-05 13:47:29,991 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 13:47:30,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:30,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:30,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:30,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:30,184 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 13:47:30,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667433425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:30,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:30,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 13:47:30,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887518875] [2021-06-05 13:47:30,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:47:30,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:30,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:47:30,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:47:30,185 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 13:47:31,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:31,031 INFO L93 Difference]: Finished difference Result 17262 states and 53968 transitions. [2021-06-05 13:47:31,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 13:47:31,032 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 13:47:31,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:31,057 INFO L225 Difference]: With dead ends: 17262 [2021-06-05 13:47:31,057 INFO L226 Difference]: Without dead ends: 17250 [2021-06-05 13:47:31,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2152 ImplicationChecksByTransitivity, 689.8ms TimeCoverageRelationStatistics Valid=2548, Invalid=5284, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 13:47:31,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17250 states. [2021-06-05 13:47:31,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17250 to 15928. [2021-06-05 13:47:31,285 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 13:47:31,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15928 states to 15928 states and 50648 transitions. [2021-06-05 13:47:31,319 INFO L78 Accepts]: Start accepts. Automaton has 15928 states and 50648 transitions. Word has length 24 [2021-06-05 13:47:31,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:31,319 INFO L482 AbstractCegarLoop]: Abstraction has 15928 states and 50648 transitions. [2021-06-05 13:47:31,319 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 13:47:31,319 INFO L276 IsEmpty]: Start isEmpty. Operand 15928 states and 50648 transitions. [2021-06-05 13:47:31,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:31,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:31,340 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:31,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable681,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:31,540 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:31,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:31,540 INFO L82 PathProgramCache]: Analyzing trace with hash 626440455, now seen corresponding path program 389 times [2021-06-05 13:47:31,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:31,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457009889] [2021-06-05 13:47:31,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:31,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:31,600 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 13:47:31,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:31,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457009889] [2021-06-05 13:47:31,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457009889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:31,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666996929] [2021-06-05 13:47:31,600 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 13:47:31,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:47:31,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:31,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:31,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:31,734 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 13:47:31,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666996929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:31,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:31,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 13:47:31,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082668388] [2021-06-05 13:47:31,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:47:31,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:31,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:47:31,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:47:31,735 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 13:47:32,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:32,405 INFO L93 Difference]: Finished difference Result 17178 states and 53993 transitions. [2021-06-05 13:47:32,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 13:47:32,405 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 13:47:32,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:32,428 INFO L225 Difference]: With dead ends: 17178 [2021-06-05 13:47:32,428 INFO L226 Difference]: Without dead ends: 17178 [2021-06-05 13:47:32,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 535.1ms TimeCoverageRelationStatistics Valid=1411, Invalid=3145, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 13:47:32,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17178 states. [2021-06-05 13:47:32,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17178 to 15887. [2021-06-05 13:47:32,642 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 13:47:32,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15887 states to 15887 states and 50525 transitions. [2021-06-05 13:47:32,673 INFO L78 Accepts]: Start accepts. Automaton has 15887 states and 50525 transitions. Word has length 24 [2021-06-05 13:47:32,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:32,673 INFO L482 AbstractCegarLoop]: Abstraction has 15887 states and 50525 transitions. [2021-06-05 13:47:32,673 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 13:47:32,673 INFO L276 IsEmpty]: Start isEmpty. Operand 15887 states and 50525 transitions. [2021-06-05 13:47:32,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:32,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:32,693 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:32,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:32,894 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:32,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:32,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1494965135, now seen corresponding path program 390 times [2021-06-05 13:47:32,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:32,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944860505] [2021-06-05 13:47:32,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:32,949 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 13:47:32,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:32,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944860505] [2021-06-05 13:47:32,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944860505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:32,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079214358] [2021-06-05 13:47:32,950 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 13:47:32,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:47:32,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:32,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:32,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:33,079 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 13:47:33,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079214358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:33,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:33,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-06-05 13:47:33,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076996637] [2021-06-05 13:47:33,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:47:33,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:33,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:47:33,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:47:33,080 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 13:47:33,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:33,688 INFO L93 Difference]: Finished difference Result 17298 states and 54207 transitions. [2021-06-05 13:47:33,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 13:47:33,688 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 13:47:33,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:33,714 INFO L225 Difference]: With dead ends: 17298 [2021-06-05 13:47:33,714 INFO L226 Difference]: Without dead ends: 17284 [2021-06-05 13:47:33,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 481.9ms TimeCoverageRelationStatistics Valid=1112, Invalid=2548, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 13:47:33,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17284 states. [2021-06-05 13:47:33,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17284 to 15888. [2021-06-05 13:47:33,965 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 13:47:33,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15888 states to 15888 states and 50523 transitions. [2021-06-05 13:47:33,997 INFO L78 Accepts]: Start accepts. Automaton has 15888 states and 50523 transitions. Word has length 24 [2021-06-05 13:47:33,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:33,997 INFO L482 AbstractCegarLoop]: Abstraction has 15888 states and 50523 transitions. [2021-06-05 13:47:33,997 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 13:47:33,997 INFO L276 IsEmpty]: Start isEmpty. Operand 15888 states and 50523 transitions. [2021-06-05 13:47:34,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:34,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:34,017 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:34,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-06-05 13:47:34,217 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:34,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:34,217 INFO L82 PathProgramCache]: Analyzing trace with hash 276056071, now seen corresponding path program 391 times [2021-06-05 13:47:34,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:34,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287247400] [2021-06-05 13:47:34,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:34,263 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 13:47:34,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:34,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287247400] [2021-06-05 13:47:34,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287247400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:34,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22098417] [2021-06-05 13:47:34,263 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 13:47:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:34,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:34,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:34,394 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 13:47:34,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22098417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:34,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:34,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 13:47:34,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51863196] [2021-06-05 13:47:34,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:34,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:34,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:34,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:34,395 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 13:47:35,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:35,024 INFO L93 Difference]: Finished difference Result 17783 states and 55482 transitions. [2021-06-05 13:47:35,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 13:47:35,024 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 13:47:35,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:35,050 INFO L225 Difference]: With dead ends: 17783 [2021-06-05 13:47:35,050 INFO L226 Difference]: Without dead ends: 17773 [2021-06-05 13:47:35,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 488.6ms TimeCoverageRelationStatistics Valid=1178, Invalid=2604, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 13:47:35,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17773 states. [2021-06-05 13:47:35,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17773 to 16003. [2021-06-05 13:47:35,279 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 13:47:35,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16003 states to 16003 states and 50857 transitions. [2021-06-05 13:47:35,310 INFO L78 Accepts]: Start accepts. Automaton has 16003 states and 50857 transitions. Word has length 24 [2021-06-05 13:47:35,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:35,310 INFO L482 AbstractCegarLoop]: Abstraction has 16003 states and 50857 transitions. [2021-06-05 13:47:35,310 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 13:47:35,310 INFO L276 IsEmpty]: Start isEmpty. Operand 16003 states and 50857 transitions. [2021-06-05 13:47:35,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:35,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:35,329 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:35,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable684,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:35,529 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:35,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:35,530 INFO L82 PathProgramCache]: Analyzing trace with hash -594547569, now seen corresponding path program 392 times [2021-06-05 13:47:35,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:35,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098531314] [2021-06-05 13:47:35,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:35,577 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 13:47:35,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:35,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098531314] [2021-06-05 13:47:35,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098531314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:35,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934074559] [2021-06-05 13:47:35,578 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 13:47:35,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:35,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:35,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:35,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:35,704 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 13:47:35,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934074559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:35,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:35,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 13:47:35,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099395835] [2021-06-05 13:47:35,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:35,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:35,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:35,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:35,705 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 13:47:36,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:36,362 INFO L93 Difference]: Finished difference Result 17914 states and 55910 transitions. [2021-06-05 13:47:36,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 13:47:36,362 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 13:47:36,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:36,389 INFO L225 Difference]: With dead ends: 17914 [2021-06-05 13:47:36,389 INFO L226 Difference]: Without dead ends: 17904 [2021-06-05 13:47:36,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 501.9ms TimeCoverageRelationStatistics Valid=1233, Invalid=2549, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 13:47:36,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17904 states. [2021-06-05 13:47:36,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17904 to 16144. [2021-06-05 13:47:36,606 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 13:47:36,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16144 states to 16144 states and 51282 transitions. [2021-06-05 13:47:36,643 INFO L78 Accepts]: Start accepts. Automaton has 16144 states and 51282 transitions. Word has length 24 [2021-06-05 13:47:36,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:36,643 INFO L482 AbstractCegarLoop]: Abstraction has 16144 states and 51282 transitions. [2021-06-05 13:47:36,643 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 13:47:36,643 INFO L276 IsEmpty]: Start isEmpty. Operand 16144 states and 51282 transitions. [2021-06-05 13:47:36,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:36,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:36,662 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:36,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable685 [2021-06-05 13:47:36,863 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:36,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:36,863 INFO L82 PathProgramCache]: Analyzing trace with hash -206989561, now seen corresponding path program 393 times [2021-06-05 13:47:36,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:36,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975250620] [2021-06-05 13:47:36,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:36,909 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 13:47:36,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:36,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975250620] [2021-06-05 13:47:36,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975250620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:36,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290668033] [2021-06-05 13:47:36,909 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 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 13:47:36,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:47:36,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:36,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:36,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:37,040 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 13:47:37,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290668033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:37,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:37,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 13:47:37,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687364783] [2021-06-05 13:47:37,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:37,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:37,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:37,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:37,041 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 13:47:37,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:37,886 INFO L93 Difference]: Finished difference Result 18800 states and 58404 transitions. [2021-06-05 13:47:37,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 13:47:37,887 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 13:47:37,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:37,915 INFO L225 Difference]: With dead ends: 18800 [2021-06-05 13:47:37,915 INFO L226 Difference]: Without dead ends: 18796 [2021-06-05 13:47:37,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 655.7ms TimeCoverageRelationStatistics Valid=1723, Invalid=3389, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 13:47:37,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18796 states. [2021-06-05 13:47:38,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18796 to 16306. [2021-06-05 13:47:38,149 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 13:47:38,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16306 states to 16306 states and 51792 transitions. [2021-06-05 13:47:38,181 INFO L78 Accepts]: Start accepts. Automaton has 16306 states and 51792 transitions. Word has length 24 [2021-06-05 13:47:38,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:38,181 INFO L482 AbstractCegarLoop]: Abstraction has 16306 states and 51792 transitions. [2021-06-05 13:47:38,181 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 13:47:38,181 INFO L276 IsEmpty]: Start isEmpty. Operand 16306 states and 51792 transitions. [2021-06-05 13:47:38,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:38,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:38,202 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:38,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable686 [2021-06-05 13:47:38,402 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:38,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:38,402 INFO L82 PathProgramCache]: Analyzing trace with hash 636796303, now seen corresponding path program 394 times [2021-06-05 13:47:38,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:38,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913116130] [2021-06-05 13:47:38,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:38,450 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 13:47:38,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:38,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913116130] [2021-06-05 13:47:38,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913116130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:38,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108013067] [2021-06-05 13:47:38,450 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 13:47:38,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:38,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:38,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:38,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:38,575 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 13:47:38,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108013067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:38,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:38,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 13:47:38,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882096149] [2021-06-05 13:47:38,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:38,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:38,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:38,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:38,576 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 13:47:39,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:39,390 INFO L93 Difference]: Finished difference Result 19224 states and 59687 transitions. [2021-06-05 13:47:39,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 13:47:39,390 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 13:47:39,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:39,419 INFO L225 Difference]: With dead ends: 19224 [2021-06-05 13:47:39,419 INFO L226 Difference]: Without dead ends: 19224 [2021-06-05 13:47:39,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 620.7ms TimeCoverageRelationStatistics Valid=1915, Invalid=3487, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 13:47:39,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19224 states. [2021-06-05 13:47:39,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19224 to 16395. [2021-06-05 13:47:39,650 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 13:47:39,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16395 states to 16395 states and 52191 transitions. [2021-06-05 13:47:39,682 INFO L78 Accepts]: Start accepts. Automaton has 16395 states and 52191 transitions. Word has length 24 [2021-06-05 13:47:39,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:39,682 INFO L482 AbstractCegarLoop]: Abstraction has 16395 states and 52191 transitions. [2021-06-05 13:47:39,682 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 13:47:39,682 INFO L276 IsEmpty]: Start isEmpty. Operand 16395 states and 52191 transitions. [2021-06-05 13:47:39,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:39,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:39,702 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:39,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable687,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:39,903 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:39,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:39,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1208251109, now seen corresponding path program 395 times [2021-06-05 13:47:39,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:39,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696193256] [2021-06-05 13:47:39,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:39,949 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 13:47:39,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:39,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696193256] [2021-06-05 13:47:39,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696193256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:39,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651234021] [2021-06-05 13:47:39,950 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 13:47:39,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:47:39,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:39,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:39,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:40,079 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 13:47:40,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651234021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:40,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:40,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 13:47:40,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968522863] [2021-06-05 13:47:40,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:40,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:40,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:40,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:40,080 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 13:47:41,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:41,094 INFO L93 Difference]: Finished difference Result 18347 states and 57068 transitions. [2021-06-05 13:47:41,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 13:47:41,094 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 13:47:41,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:41,120 INFO L225 Difference]: With dead ends: 18347 [2021-06-05 13:47:41,120 INFO L226 Difference]: Without dead ends: 18335 [2021-06-05 13:47:41,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2217 ImplicationChecksByTransitivity, 776.0ms TimeCoverageRelationStatistics Valid=2592, Invalid=5598, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 13:47:41,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18335 states. [2021-06-05 13:47:41,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18335 to 16091. [2021-06-05 13:47:41,340 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 13:47:41,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16091 states to 16091 states and 51137 transitions. [2021-06-05 13:47:41,373 INFO L78 Accepts]: Start accepts. Automaton has 16091 states and 51137 transitions. Word has length 24 [2021-06-05 13:47:41,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:41,373 INFO L482 AbstractCegarLoop]: Abstraction has 16091 states and 51137 transitions. [2021-06-05 13:47:41,373 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 13:47:41,374 INFO L276 IsEmpty]: Start isEmpty. Operand 16091 states and 51137 transitions. [2021-06-05 13:47:41,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:41,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:41,394 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:41,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable688 [2021-06-05 13:47:41,601 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:41,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:41,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1743480911, now seen corresponding path program 396 times [2021-06-05 13:47:41,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:41,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653972939] [2021-06-05 13:47:41,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:41,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:41,652 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 13:47:41,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:41,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653972939] [2021-06-05 13:47:41,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653972939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:41,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585205278] [2021-06-05 13:47:41,653 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 13:47:41,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:47:41,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:41,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:41,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:41,784 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 13:47:41,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585205278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:41,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:41,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-06-05 13:47:41,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289724241] [2021-06-05 13:47:41,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:47:41,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:41,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:47:41,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:47:41,785 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 13:47:42,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:42,700 INFO L93 Difference]: Finished difference Result 18125 states and 56330 transitions. [2021-06-05 13:47:42,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 13:47:42,701 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 13:47:42,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:42,727 INFO L225 Difference]: With dead ends: 18125 [2021-06-05 13:47:42,727 INFO L226 Difference]: Without dead ends: 18101 [2021-06-05 13:47:42,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 773.4ms TimeCoverageRelationStatistics Valid=2475, Invalid=5535, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 13:47:42,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18101 states. [2021-06-05 13:47:42,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18101 to 15884. [2021-06-05 13:47:42,954 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 13:47:42,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15884 states to 15884 states and 50505 transitions. [2021-06-05 13:47:42,987 INFO L78 Accepts]: Start accepts. Automaton has 15884 states and 50505 transitions. Word has length 24 [2021-06-05 13:47:42,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:42,987 INFO L482 AbstractCegarLoop]: Abstraction has 15884 states and 50505 transitions. [2021-06-05 13:47:42,987 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 13:47:42,987 INFO L276 IsEmpty]: Start isEmpty. Operand 15884 states and 50505 transitions. [2021-06-05 13:47:43,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:43,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:43,007 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:43,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-06-05 13:47:43,207 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:43,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:43,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1155735589, now seen corresponding path program 397 times [2021-06-05 13:47:43,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:43,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571662076] [2021-06-05 13:47:43,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:43,266 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 13:47:43,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:43,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571662076] [2021-06-05 13:47:43,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571662076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:43,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643795224] [2021-06-05 13:47:43,267 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 13:47:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:43,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:43,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:43,400 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 13:47:43,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643795224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:43,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:43,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 13:47:43,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372226201] [2021-06-05 13:47:43,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:47:43,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:43,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:47:43,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:47:43,401 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 13:47:44,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:44,248 INFO L93 Difference]: Finished difference Result 17742 states and 55315 transitions. [2021-06-05 13:47:44,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 13:47:44,248 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 13:47:44,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:44,277 INFO L225 Difference]: With dead ends: 17742 [2021-06-05 13:47:44,278 INFO L226 Difference]: Without dead ends: 17724 [2021-06-05 13:47:44,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2321 ImplicationChecksByTransitivity, 701.0ms TimeCoverageRelationStatistics Valid=2455, Invalid=5555, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 13:47:44,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17724 states. [2021-06-05 13:47:44,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17724 to 15928. [2021-06-05 13:47:44,570 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 13:47:44,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15928 states to 15928 states and 50653 transitions. [2021-06-05 13:47:44,606 INFO L78 Accepts]: Start accepts. Automaton has 15928 states and 50653 transitions. Word has length 24 [2021-06-05 13:47:44,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:44,606 INFO L482 AbstractCegarLoop]: Abstraction has 15928 states and 50653 transitions. [2021-06-05 13:47:44,606 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 13:47:44,606 INFO L276 IsEmpty]: Start isEmpty. Operand 15928 states and 50653 transitions. [2021-06-05 13:47:44,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:44,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:44,628 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:44,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:44,828 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:44,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:44,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1843830867, now seen corresponding path program 398 times [2021-06-05 13:47:44,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:44,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375639809] [2021-06-05 13:47:44,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:44,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:44,889 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 13:47:44,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:44,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375639809] [2021-06-05 13:47:44,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375639809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:44,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025847228] [2021-06-05 13:47:44,889 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 13:47:44,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:44,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:44,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:44,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:45,045 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 13:47:45,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025847228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:45,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:45,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 13:47:45,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999893551] [2021-06-05 13:47:45,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:47:45,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:45,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:47:45,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:47:45,046 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 13:47:45,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:45,787 INFO L93 Difference]: Finished difference Result 16795 states and 52835 transitions. [2021-06-05 13:47:45,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 13:47:45,787 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 13:47:45,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:45,811 INFO L225 Difference]: With dead ends: 16795 [2021-06-05 13:47:45,811 INFO L226 Difference]: Without dead ends: 16795 [2021-06-05 13:47:45,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 622.1ms TimeCoverageRelationStatistics Valid=1571, Invalid=3685, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 13:47:45,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16795 states. [2021-06-05 13:47:46,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16795 to 15853. [2021-06-05 13:47:46,019 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 13:47:46,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15853 states to 15853 states and 50426 transitions. [2021-06-05 13:47:46,050 INFO L78 Accepts]: Start accepts. Automaton has 15853 states and 50426 transitions. Word has length 24 [2021-06-05 13:47:46,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:46,050 INFO L482 AbstractCegarLoop]: Abstraction has 15853 states and 50426 transitions. [2021-06-05 13:47:46,050 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 13:47:46,050 INFO L276 IsEmpty]: Start isEmpty. Operand 15853 states and 50426 transitions. [2021-06-05 13:47:46,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:46,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:46,069 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:46,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:46,269 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:46,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:46,269 INFO L82 PathProgramCache]: Analyzing trace with hash -448052653, now seen corresponding path program 399 times [2021-06-05 13:47:46,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:46,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343494329] [2021-06-05 13:47:46,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:46,321 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 13:47:46,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:46,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343494329] [2021-06-05 13:47:46,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343494329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:46,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140469196] [2021-06-05 13:47:46,322 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 13:47:46,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:47:46,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:46,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:46,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:46,461 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 13:47:46,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140469196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:46,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:46,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-06-05 13:47:46,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967525494] [2021-06-05 13:47:46,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:47:46,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:46,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:47:46,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:47:46,461 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 13:47:47,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:47,166 INFO L93 Difference]: Finished difference Result 16783 states and 52633 transitions. [2021-06-05 13:47:47,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 13:47:47,167 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 13:47:47,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:47,192 INFO L225 Difference]: With dead ends: 16783 [2021-06-05 13:47:47,192 INFO L226 Difference]: Without dead ends: 16769 [2021-06-05 13:47:47,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1182 ImplicationChecksByTransitivity, 543.4ms TimeCoverageRelationStatistics Valid=1254, Invalid=3036, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 13:47:47,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16769 states. [2021-06-05 13:47:47,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16769 to 15761. [2021-06-05 13:47:47,404 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 13:47:47,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15761 states to 15761 states and 50126 transitions. [2021-06-05 13:47:47,435 INFO L78 Accepts]: Start accepts. Automaton has 15761 states and 50126 transitions. Word has length 24 [2021-06-05 13:47:47,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:47,435 INFO L482 AbstractCegarLoop]: Abstraction has 15761 states and 50126 transitions. [2021-06-05 13:47:47,436 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 13:47:47,436 INFO L276 IsEmpty]: Start isEmpty. Operand 15761 states and 50126 transitions. [2021-06-05 13:47:47,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:47,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:47,455 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:47,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:47,655 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:47,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:47,655 INFO L82 PathProgramCache]: Analyzing trace with hash 2110414931, now seen corresponding path program 400 times [2021-06-05 13:47:47,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:47,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894825291] [2021-06-05 13:47:47,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:47,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:47,702 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 13:47:47,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:47,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894825291] [2021-06-05 13:47:47,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894825291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:47,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275039408] [2021-06-05 13:47:47,703 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 13:47:47,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:47,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:47,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:47,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:47,839 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 13:47:47,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275039408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:47,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:47,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-06-05 13:47:47,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414685023] [2021-06-05 13:47:47,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:47:47,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:47,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:47:47,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:47:47,840 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 13:47:48,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:48,599 INFO L93 Difference]: Finished difference Result 17488 states and 54534 transitions. [2021-06-05 13:47:48,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 13:47:48,599 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 13:47:48,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:48,622 INFO L225 Difference]: With dead ends: 17488 [2021-06-05 13:47:48,622 INFO L226 Difference]: Without dead ends: 17478 [2021-06-05 13:47:48,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 584.1ms TimeCoverageRelationStatistics Valid=1312, Invalid=2978, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 13:47:48,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17478 states. [2021-06-05 13:47:48,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17478 to 15724. [2021-06-05 13:47:48,835 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 13:47:48,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15724 states to 15724 states and 49996 transitions. [2021-06-05 13:47:48,866 INFO L78 Accepts]: Start accepts. Automaton has 15724 states and 49996 transitions. Word has length 24 [2021-06-05 13:47:48,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:48,866 INFO L482 AbstractCegarLoop]: Abstraction has 15724 states and 49996 transitions. [2021-06-05 13:47:48,866 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 13:47:48,866 INFO L276 IsEmpty]: Start isEmpty. Operand 15724 states and 49996 transitions. [2021-06-05 13:47:48,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:48,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:48,885 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:49,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable693,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:49,085 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:49,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:49,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1777304147, now seen corresponding path program 401 times [2021-06-05 13:47:49,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:49,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125639664] [2021-06-05 13:47:49,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:49,126 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 13:47:49,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:49,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125639664] [2021-06-05 13:47:49,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125639664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:49,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952602825] [2021-06-05 13:47:49,126 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 13:47:49,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:47:49,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:49,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:49,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:49,257 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 13:47:49,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952602825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:49,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:49,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-06-05 13:47:49,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532846756] [2021-06-05 13:47:49,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:49,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:49,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:49,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:49,258 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 13:47:49,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:49,980 INFO L93 Difference]: Finished difference Result 19027 states and 59058 transitions. [2021-06-05 13:47:49,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 13:47:49,980 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 13:47:49,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:50,008 INFO L225 Difference]: With dead ends: 19027 [2021-06-05 13:47:50,008 INFO L226 Difference]: Without dead ends: 19021 [2021-06-05 13:47:50,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 533.9ms TimeCoverageRelationStatistics Valid=1353, Invalid=2807, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 13:47:50,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19021 states. [2021-06-05 13:47:50,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19021 to 16139. [2021-06-05 13:47:50,232 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 13:47:50,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16139 states to 16139 states and 51296 transitions. [2021-06-05 13:47:50,264 INFO L78 Accepts]: Start accepts. Automaton has 16139 states and 51296 transitions. Word has length 24 [2021-06-05 13:47:50,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:50,264 INFO L482 AbstractCegarLoop]: Abstraction has 16139 states and 51296 transitions. [2021-06-05 13:47:50,264 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 13:47:50,265 INFO L276 IsEmpty]: Start isEmpty. Operand 16139 states and 51296 transitions. [2021-06-05 13:47:50,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:50,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:50,285 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:50,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2021-06-05 13:47:50,485 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:50,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:50,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1281482669, now seen corresponding path program 402 times [2021-06-05 13:47:50,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:50,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649345807] [2021-06-05 13:47:50,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:50,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:50,530 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 13:47:50,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:50,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649345807] [2021-06-05 13:47:50,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649345807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:50,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887079728] [2021-06-05 13:47:50,531 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 13:47:50,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:47:50,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:50,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:50,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:50,662 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 13:47:50,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887079728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:50,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:50,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-06-05 13:47:50,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465588290] [2021-06-05 13:47:50,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:50,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:50,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:50,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:50,663 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 13:47:51,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:51,398 INFO L93 Difference]: Finished difference Result 18678 states and 58104 transitions. [2021-06-05 13:47:51,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 13:47:51,399 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 13:47:51,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:51,423 INFO L225 Difference]: With dead ends: 18678 [2021-06-05 13:47:51,423 INFO L226 Difference]: Without dead ends: 18674 [2021-06-05 13:47:51,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 572.2ms TimeCoverageRelationStatistics Valid=1546, Invalid=3010, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 13:47:51,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18674 states. [2021-06-05 13:47:51,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18674 to 16227. [2021-06-05 13:47:51,725 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 13:47:51,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16227 states to 16227 states and 51578 transitions. [2021-06-05 13:47:51,761 INFO L78 Accepts]: Start accepts. Automaton has 16227 states and 51578 transitions. Word has length 24 [2021-06-05 13:47:51,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:51,761 INFO L482 AbstractCegarLoop]: Abstraction has 16227 states and 51578 transitions. [2021-06-05 13:47:51,761 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 13:47:51,761 INFO L276 IsEmpty]: Start isEmpty. Operand 16227 states and 51578 transitions. [2021-06-05 13:47:51,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:51,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:51,782 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:51,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable695 [2021-06-05 13:47:51,983 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:51,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:51,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1252246099, now seen corresponding path program 403 times [2021-06-05 13:47:51,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:51,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821163574] [2021-06-05 13:47:51,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:52,025 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 13:47:52,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:52,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821163574] [2021-06-05 13:47:52,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821163574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:52,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016176722] [2021-06-05 13:47:52,025 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 13:47:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:52,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:52,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:52,153 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 13:47:52,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016176722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:52,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:52,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-06-05 13:47:52,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063526332] [2021-06-05 13:47:52,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:52,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:52,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:52,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:52,154 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 13:47:52,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:52,917 INFO L93 Difference]: Finished difference Result 19416 states and 60144 transitions. [2021-06-05 13:47:52,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 13:47:52,918 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 13:47:52,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:52,947 INFO L225 Difference]: With dead ends: 19416 [2021-06-05 13:47:52,947 INFO L226 Difference]: Without dead ends: 19416 [2021-06-05 13:47:52,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 592.9ms TimeCoverageRelationStatistics Valid=1821, Invalid=3291, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 13:47:52,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19416 states. [2021-06-05 13:47:53,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19416 to 16138. [2021-06-05 13:47:53,183 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 13:47:53,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16138 states to 16138 states and 51399 transitions. [2021-06-05 13:47:53,221 INFO L78 Accepts]: Start accepts. Automaton has 16138 states and 51399 transitions. Word has length 24 [2021-06-05 13:47:53,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:53,221 INFO L482 AbstractCegarLoop]: Abstraction has 16138 states and 51399 transitions. [2021-06-05 13:47:53,221 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 13:47:53,221 INFO L276 IsEmpty]: Start isEmpty. Operand 16138 states and 51399 transitions. [2021-06-05 13:47:53,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:53,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:53,241 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:53,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable696 [2021-06-05 13:47:53,441 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:53,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:53,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1823700905, now seen corresponding path program 404 times [2021-06-05 13:47:53,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:53,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640170542] [2021-06-05 13:47:53,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:53,484 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 13:47:53,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:53,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640170542] [2021-06-05 13:47:53,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640170542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:53,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387856325] [2021-06-05 13:47:53,484 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 13:47:53,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:53,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:53,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:53,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:53,629 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 13:47:53,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387856325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:53,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:53,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-06-05 13:47:53,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291360674] [2021-06-05 13:47:53,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:47:53,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:53,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:47:53,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:47:53,630 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 13:47:54,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:54,632 INFO L93 Difference]: Finished difference Result 18584 states and 57665 transitions. [2021-06-05 13:47:54,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 13:47:54,632 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 13:47:54,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:54,657 INFO L225 Difference]: With dead ends: 18584 [2021-06-05 13:47:54,657 INFO L226 Difference]: Without dead ends: 18575 [2021-06-05 13:47:54,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2672 ImplicationChecksByTransitivity, 830.6ms TimeCoverageRelationStatistics Valid=2787, Invalid=6333, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 13:47:54,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18575 states. [2021-06-05 13:47:54,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18575 to 16009. [2021-06-05 13:47:54,891 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 13:47:54,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16009 states to 16009 states and 50944 transitions. [2021-06-05 13:47:54,924 INFO L78 Accepts]: Start accepts. Automaton has 16009 states and 50944 transitions. Word has length 24 [2021-06-05 13:47:54,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:54,924 INFO L482 AbstractCegarLoop]: Abstraction has 16009 states and 50944 transitions. [2021-06-05 13:47:54,924 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 13:47:54,924 INFO L276 IsEmpty]: Start isEmpty. Operand 16009 states and 50944 transitions. [2021-06-05 13:47:54,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:54,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:54,945 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:55,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 408 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-06-05 13:47:55,145 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:55,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:55,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1936036589, now seen corresponding path program 405 times [2021-06-05 13:47:55,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:55,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809221978] [2021-06-05 13:47:55,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:55,195 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 13:47:55,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:55,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809221978] [2021-06-05 13:47:55,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809221978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:55,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472613079] [2021-06-05 13:47:55,195 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 13:47:55,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:47:55,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:55,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:55,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:55,345 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 13:47:55,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472613079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:55,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:55,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-06-05 13:47:55,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96300505] [2021-06-05 13:47:55,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:47:55,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:55,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:47:55,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:47:55,345 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 13:47:56,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:56,414 INFO L93 Difference]: Finished difference Result 18529 states and 57461 transitions. [2021-06-05 13:47:56,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 13:47:56,415 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 13:47:56,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:56,444 INFO L225 Difference]: With dead ends: 18529 [2021-06-05 13:47:56,444 INFO L226 Difference]: Without dead ends: 18514 [2021-06-05 13:47:56,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2513 ImplicationChecksByTransitivity, 898.7ms TimeCoverageRelationStatistics Valid=2529, Invalid=6027, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 13:47:56,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18514 states. [2021-06-05 13:47:56,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18514 to 15897. [2021-06-05 13:47:56,674 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 13:47:56,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15897 states to 15897 states and 50577 transitions. [2021-06-05 13:47:56,704 INFO L78 Accepts]: Start accepts. Automaton has 15897 states and 50577 transitions. Word has length 24 [2021-06-05 13:47:56,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:56,704 INFO L482 AbstractCegarLoop]: Abstraction has 15897 states and 50577 transitions. [2021-06-05 13:47:56,704 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 13:47:56,704 INFO L276 IsEmpty]: Start isEmpty. Operand 15897 states and 50577 transitions. [2021-06-05 13:47:56,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:56,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:56,722 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:56,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable698 [2021-06-05 13:47:56,923 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:56,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:56,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1771185385, now seen corresponding path program 406 times [2021-06-05 13:47:56,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:56,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192758282] [2021-06-05 13:47:56,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:56,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:56,977 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 13:47:56,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:56,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192758282] [2021-06-05 13:47:56,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192758282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:56,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301355588] [2021-06-05 13:47:56,977 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 13:47:57,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:57,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:57,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:57,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:57,117 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 13:47:57,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301355588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:57,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:57,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-06-05 13:47:57,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881547842] [2021-06-05 13:47:57,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:47:57,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:57,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:47:57,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:47:57,118 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 13:47:58,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:58,029 INFO L93 Difference]: Finished difference Result 18517 states and 57409 transitions. [2021-06-05 13:47:58,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 13:47:58,029 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 13:47:58,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:58,053 INFO L225 Difference]: With dead ends: 18517 [2021-06-05 13:47:58,054 INFO L226 Difference]: Without dead ends: 18490 [2021-06-05 13:47:58,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2460 ImplicationChecksByTransitivity, 787.5ms TimeCoverageRelationStatistics Valid=2373, Invalid=5817, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 13:47:58,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18490 states. [2021-06-05 13:47:58,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18490 to 15779. [2021-06-05 13:47:58,283 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 13:47:58,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15779 states to 15779 states and 50217 transitions. [2021-06-05 13:47:58,319 INFO L78 Accepts]: Start accepts. Automaton has 15779 states and 50217 transitions. Word has length 24 [2021-06-05 13:47:58,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:58,319 INFO L482 AbstractCegarLoop]: Abstraction has 15779 states and 50217 transitions. [2021-06-05 13:47:58,319 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 13:47:58,319 INFO L276 IsEmpty]: Start isEmpty. Operand 15779 states and 50217 transitions. [2021-06-05 13:47:58,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:58,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:58,341 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:58,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable699 [2021-06-05 13:47:58,541 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:58,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:58,542 INFO L82 PathProgramCache]: Analyzing trace with hash 730949587, now seen corresponding path program 407 times [2021-06-05 13:47:58,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:58,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240231601] [2021-06-05 13:47:58,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:58,603 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 13:47:58,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:58,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240231601] [2021-06-05 13:47:58,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240231601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:58,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616657465] [2021-06-05 13:47:58,603 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 13:47:58,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:47:58,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:58,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:47:58,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:58,747 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 13:47:58,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616657465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:58,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:58,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 13:47:58,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920313605] [2021-06-05 13:47:58,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:47:58,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:58,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:47:58,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:47:58,748 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 13:47:59,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:59,600 INFO L93 Difference]: Finished difference Result 18160 states and 56473 transitions. [2021-06-05 13:47:59,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 13:47:59,601 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 13:47:59,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:59,630 INFO L225 Difference]: With dead ends: 18160 [2021-06-05 13:47:59,630 INFO L226 Difference]: Without dead ends: 18136 [2021-06-05 13:47:59,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2410 ImplicationChecksByTransitivity, 735.7ms TimeCoverageRelationStatistics Valid=2313, Invalid=5697, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 13:47:59,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18136 states. [2021-06-05 13:47:59,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18136 to 15810. [2021-06-05 13:47:59,873 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 13:47:59,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15810 states to 15810 states and 50322 transitions. [2021-06-05 13:47:59,908 INFO L78 Accepts]: Start accepts. Automaton has 15810 states and 50322 transitions. Word has length 24 [2021-06-05 13:47:59,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:59,908 INFO L482 AbstractCegarLoop]: Abstraction has 15810 states and 50322 transitions. [2021-06-05 13:47:59,908 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 13:47:59,908 INFO L276 IsEmpty]: Start isEmpty. Operand 15810 states and 50322 transitions. [2021-06-05 13:47:59,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:47:59,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:59,930 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:00,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable700,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:00,130 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:00,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:00,130 INFO L82 PathProgramCache]: Analyzing trace with hash 928227975, now seen corresponding path program 408 times [2021-06-05 13:48:00,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:00,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021836245] [2021-06-05 13:48:00,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:00,191 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 13:48:00,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:00,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021836245] [2021-06-05 13:48:00,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021836245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:00,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72339313] [2021-06-05 13:48:00,192 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 13:48:00,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:48:00,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:00,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:48:00,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:00,350 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 13:48:00,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72339313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:00,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:00,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-06-05 13:48:00,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130052903] [2021-06-05 13:48:00,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:48:00,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:00,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:48:00,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:48:00,351 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 13:48:01,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:01,128 INFO L93 Difference]: Finished difference Result 16413 states and 51718 transitions. [2021-06-05 13:48:01,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 13:48:01,128 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 13:48:01,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:01,151 INFO L225 Difference]: With dead ends: 16413 [2021-06-05 13:48:01,151 INFO L226 Difference]: Without dead ends: 16413 [2021-06-05 13:48:01,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 677.1ms TimeCoverageRelationStatistics Valid=1699, Invalid=4153, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 13:48:01,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16413 states. [2021-06-05 13:48:01,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16413 to 15703. [2021-06-05 13:48:01,364 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 13:48:01,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15703 states to 15703 states and 49970 transitions. [2021-06-05 13:48:01,398 INFO L78 Accepts]: Start accepts. Automaton has 15703 states and 49970 transitions. Word has length 24 [2021-06-05 13:48:01,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:01,398 INFO L482 AbstractCegarLoop]: Abstraction has 15703 states and 49970 transitions. [2021-06-05 13:48:01,398 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 13:48:01,398 INFO L276 IsEmpty]: Start isEmpty. Operand 15703 states and 49970 transitions. [2021-06-05 13:48:01,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:48:01,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:01,418 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:01,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable701 [2021-06-05 13:48:01,619 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:01,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:01,619 INFO L82 PathProgramCache]: Analyzing trace with hash -552061937, now seen corresponding path program 409 times [2021-06-05 13:48:01,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:01,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915949761] [2021-06-05 13:48:01,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:01,671 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 13:48:01,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:01,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915949761] [2021-06-05 13:48:01,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915949761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:01,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761842397] [2021-06-05 13:48:01,671 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 13:48:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:01,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:48:01,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:01,822 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 13:48:01,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761842397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:01,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:01,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-06-05 13:48:01,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490308745] [2021-06-05 13:48:01,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:48:01,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:01,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:48:01,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:48:01,823 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 13:48:02,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:02,562 INFO L93 Difference]: Finished difference Result 16653 states and 52172 transitions. [2021-06-05 13:48:02,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 13:48:02,562 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 13:48:02,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:02,585 INFO L225 Difference]: With dead ends: 16653 [2021-06-05 13:48:02,585 INFO L226 Difference]: Without dead ends: 16639 [2021-06-05 13:48:02,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 595.9ms TimeCoverageRelationStatistics Valid=1371, Invalid=3459, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 13:48:02,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16639 states. [2021-06-05 13:48:02,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16639 to 15440. [2021-06-05 13:48:02,795 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 13:48:02,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15440 states to 15440 states and 49149 transitions. [2021-06-05 13:48:02,911 INFO L78 Accepts]: Start accepts. Automaton has 15440 states and 49149 transitions. Word has length 24 [2021-06-05 13:48:02,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:02,911 INFO L482 AbstractCegarLoop]: Abstraction has 15440 states and 49149 transitions. [2021-06-05 13:48:02,911 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 13:48:02,911 INFO L276 IsEmpty]: Start isEmpty. Operand 15440 states and 49149 transitions. [2021-06-05 13:48:02,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:48:02,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:02,931 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:03,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable702,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:03,132 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:03,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:03,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1154002553, now seen corresponding path program 410 times [2021-06-05 13:48:03,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:03,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754269073] [2021-06-05 13:48:03,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:03,177 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 13:48:03,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:03,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754269073] [2021-06-05 13:48:03,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754269073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:03,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593554023] [2021-06-05 13:48:03,178 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 13:48:03,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:48:03,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:03,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:48:03,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:03,322 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 13:48:03,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593554023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:03,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:03,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-06-05 13:48:03,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273876539] [2021-06-05 13:48:03,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:48:03,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:03,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:48:03,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:48:03,323 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 13:48:04,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:04,052 INFO L93 Difference]: Finished difference Result 17145 states and 53340 transitions. [2021-06-05 13:48:04,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 13:48:04,052 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 13:48:04,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:04,078 INFO L225 Difference]: With dead ends: 17145 [2021-06-05 13:48:04,078 INFO L226 Difference]: Without dead ends: 17135 [2021-06-05 13:48:04,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 551.3ms TimeCoverageRelationStatistics Valid=1349, Invalid=3207, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 13:48:04,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17135 states. [2021-06-05 13:48:04,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17135 to 15065. [2021-06-05 13:48:04,293 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 13:48:04,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15065 states to 15065 states and 47961 transitions. [2021-06-05 13:48:04,326 INFO L78 Accepts]: Start accepts. Automaton has 15065 states and 47961 transitions. Word has length 24 [2021-06-05 13:48:04,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:04,326 INFO L482 AbstractCegarLoop]: Abstraction has 15065 states and 47961 transitions. [2021-06-05 13:48:04,326 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 13:48:04,326 INFO L276 IsEmpty]: Start isEmpty. Operand 15065 states and 47961 transitions. [2021-06-05 13:48:04,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:48:04,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:04,347 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:04,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable703 [2021-06-05 13:48:04,547 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:04,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:04,547 INFO L82 PathProgramCache]: Analyzing trace with hash -2004703985, now seen corresponding path program 411 times [2021-06-05 13:48:04,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:04,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372291814] [2021-06-05 13:48:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:04,588 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 13:48:04,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:04,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372291814] [2021-06-05 13:48:04,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372291814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:04,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770223403] [2021-06-05 13:48:04,588 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 13:48:04,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:48:04,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:04,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:48:04,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:04,731 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 13:48:04,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770223403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:04,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:04,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 23 [2021-06-05 13:48:04,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229559050] [2021-06-05 13:48:04,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:48:04,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:04,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:48:04,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:48:04,732 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 13:48:05,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:05,465 INFO L93 Difference]: Finished difference Result 18361 states and 56965 transitions. [2021-06-05 13:48:05,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 13:48:05,465 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 13:48:05,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:05,494 INFO L225 Difference]: With dead ends: 18361 [2021-06-05 13:48:05,494 INFO L226 Difference]: Without dead ends: 18355 [2021-06-05 13:48:05,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 551.1ms TimeCoverageRelationStatistics Valid=1388, Invalid=3034, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 13:48:05,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18355 states. [2021-06-05 13:48:05,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18355 to 15150. [2021-06-05 13:48:05,715 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 13:48:05,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15150 states to 15150 states and 48223 transitions. [2021-06-05 13:48:05,746 INFO L78 Accepts]: Start accepts. Automaton has 15150 states and 48223 transitions. Word has length 24 [2021-06-05 13:48:05,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:05,746 INFO L482 AbstractCegarLoop]: Abstraction has 15150 states and 48223 transitions. [2021-06-05 13:48:05,746 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 13:48:05,746 INFO L276 IsEmpty]: Start isEmpty. Operand 15150 states and 48223 transitions. [2021-06-05 13:48:05,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:48:05,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:05,764 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:05,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable704 [2021-06-05 13:48:05,965 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:05,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:05,965 INFO L82 PathProgramCache]: Analyzing trace with hash -231030649, now seen corresponding path program 412 times [2021-06-05 13:48:05,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:05,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552828137] [2021-06-05 13:48:05,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:05,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:06,002 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 13:48:06,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:06,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552828137] [2021-06-05 13:48:06,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552828137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:06,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721896205] [2021-06-05 13:48:06,002 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 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 13:48:06,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:48:06,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:06,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:48:06,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:06,170 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 13:48:06,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721896205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:06,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:06,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2021-06-05 13:48:06,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490430146] [2021-06-05 13:48:06,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:48:06,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:06,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:48:06,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:48:06,171 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 13:48:06,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:06,930 INFO L93 Difference]: Finished difference Result 20262 states and 62769 transitions. [2021-06-05 13:48:06,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 13:48:06,931 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 13:48:06,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:06,961 INFO L225 Difference]: With dead ends: 20262 [2021-06-05 13:48:06,961 INFO L226 Difference]: Without dead ends: 20260 [2021-06-05 13:48:06,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 595.4ms TimeCoverageRelationStatistics Valid=1573, Invalid=3119, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 13:48:06,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20260 states. [2021-06-05 13:48:07,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20260 to 16488. [2021-06-05 13:48:07,218 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 13:48:07,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16488 states to 16488 states and 52408 transitions. [2021-06-05 13:48:07,253 INFO L78 Accepts]: Start accepts. Automaton has 16488 states and 52408 transitions. Word has length 24 [2021-06-05 13:48:07,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:07,253 INFO L482 AbstractCegarLoop]: Abstraction has 16488 states and 52408 transitions. [2021-06-05 13:48:07,253 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 13:48:07,253 INFO L276 IsEmpty]: Start isEmpty. Operand 16488 states and 52408 transitions. [2021-06-05 13:48:07,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:48:07,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:07,273 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:07,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable705,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:07,475 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:07,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:07,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1143646705, now seen corresponding path program 413 times [2021-06-05 13:48:07,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:07,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979886807] [2021-06-05 13:48:07,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:07,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:07,513 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 13:48:07,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:07,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979886807] [2021-06-05 13:48:07,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979886807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:07,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748889100] [2021-06-05 13:48:07,513 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 13:48:07,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:48:07,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:07,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:48:07,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:07,644 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 13:48:07,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748889100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:07,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:07,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2021-06-05 13:48:07,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839157235] [2021-06-05 13:48:07,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:48:07,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:07,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:48:07,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:48:07,645 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 13:48:08,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:08,404 INFO L93 Difference]: Finished difference Result 19932 states and 61591 transitions. [2021-06-05 13:48:08,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 13:48:08,405 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 13:48:08,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:08,433 INFO L225 Difference]: With dead ends: 19932 [2021-06-05 13:48:08,433 INFO L226 Difference]: Without dead ends: 19932 [2021-06-05 13:48:08,433 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 13:48:08,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19932 states. [2021-06-05 13:48:08,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19932 to 16990. [2021-06-05 13:48:08,692 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 13:48:08,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16990 states to 16990 states and 54087 transitions. [2021-06-05 13:48:08,729 INFO L78 Accepts]: Start accepts. Automaton has 16990 states and 54087 transitions. Word has length 24 [2021-06-05 13:48:08,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:08,729 INFO L482 AbstractCegarLoop]: Abstraction has 16990 states and 54087 transitions. [2021-06-05 13:48:08,729 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 13:48:08,729 INFO L276 IsEmpty]: Start isEmpty. Operand 16990 states and 54087 transitions. [2021-06-05 13:48:08,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:48:08,751 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:08,751 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:08,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:08,951 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:08,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:08,951 INFO L82 PathProgramCache]: Analyzing trace with hash -572191899, now seen corresponding path program 414 times [2021-06-05 13:48:08,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:08,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169777839] [2021-06-05 13:48:08,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:08,993 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 13:48:08,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:08,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169777839] [2021-06-05 13:48:08,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169777839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:08,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447979117] [2021-06-05 13:48:08,993 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 13:48:09,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:48:09,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:09,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:48:09,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:09,127 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 13:48:09,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447979117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:09,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:09,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2021-06-05 13:48:09,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072156041] [2021-06-05 13:48:09,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:48:09,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:09,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:48:09,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:48:09,127 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 13:48:10,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:10,213 INFO L93 Difference]: Finished difference Result 19753 states and 61171 transitions. [2021-06-05 13:48:10,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 13:48:10,213 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 13:48:10,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:10,239 INFO L225 Difference]: With dead ends: 19753 [2021-06-05 13:48:10,239 INFO L226 Difference]: Without dead ends: 19744 [2021-06-05 13:48:10,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3393 ImplicationChecksByTransitivity, 927.5ms TimeCoverageRelationStatistics Valid=3090, Invalid=7416, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 13:48:10,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19744 states. [2021-06-05 13:48:10,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19744 to 16867. [2021-06-05 13:48:10,511 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 13:48:10,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16867 states to 16867 states and 53668 transitions. [2021-06-05 13:48:10,545 INFO L78 Accepts]: Start accepts. Automaton has 16867 states and 53668 transitions. Word has length 24 [2021-06-05 13:48:10,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:10,546 INFO L482 AbstractCegarLoop]: Abstraction has 16867 states and 53668 transitions. [2021-06-05 13:48:10,546 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 13:48:10,546 INFO L276 IsEmpty]: Start isEmpty. Operand 16867 states and 53668 transitions. [2021-06-05 13:48:10,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:48:10,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:10,566 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:10,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:10,767 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:10,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:10,767 INFO L82 PathProgramCache]: Analyzing trace with hash -36962097, now seen corresponding path program 415 times [2021-06-05 13:48:10,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:10,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570896986] [2021-06-05 13:48:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:10,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:10,809 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 13:48:10,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:10,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570896986] [2021-06-05 13:48:10,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570896986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:10,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974712556] [2021-06-05 13:48:10,809 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 13:48:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:10,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:48:10,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:10,947 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 13:48:10,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974712556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:10,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:10,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 23 [2021-06-05 13:48:10,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719587230] [2021-06-05 13:48:10,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:48:10,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:10,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:48:10,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:48:10,948 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 13:48:11,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:11,952 INFO L93 Difference]: Finished difference Result 19710 states and 61049 transitions. [2021-06-05 13:48:11,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 13:48:11,952 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 13:48:11,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:11,982 INFO L225 Difference]: With dead ends: 19710 [2021-06-05 13:48:11,983 INFO L226 Difference]: Without dead ends: 19698 [2021-06-05 13:48:11,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3019 ImplicationChecksByTransitivity, 843.3ms TimeCoverageRelationStatistics Valid=2700, Invalid=6806, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 13:48:11,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19698 states. [2021-06-05 13:48:12,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19698 to 16758. [2021-06-05 13:48:12,223 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 13:48:12,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16758 states to 16758 states and 53312 transitions. [2021-06-05 13:48:12,254 INFO L78 Accepts]: Start accepts. Automaton has 16758 states and 53312 transitions. Word has length 24 [2021-06-05 13:48:12,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:12,254 INFO L482 AbstractCegarLoop]: Abstraction has 16758 states and 53312 transitions. [2021-06-05 13:48:12,254 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 13:48:12,254 INFO L276 IsEmpty]: Start isEmpty. Operand 16758 states and 53312 transitions. [2021-06-05 13:48:12,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:48:12,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:12,273 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:12,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable708 [2021-06-05 13:48:12,473 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:12,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:12,474 INFO L82 PathProgramCache]: Analyzing trace with hash -624707419, now seen corresponding path program 416 times [2021-06-05 13:48:12,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:12,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981116451] [2021-06-05 13:48:12,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:12,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:12,521 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 13:48:12,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:12,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981116451] [2021-06-05 13:48:12,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981116451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:12,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80481667] [2021-06-05 13:48:12,522 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 13:48:12,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:48:12,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:12,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:48:12,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:12,660 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 13:48:12,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80481667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:12,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:12,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-06-05 13:48:12,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016902972] [2021-06-05 13:48:12,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:48:12,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:12,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:48:12,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:48:12,661 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 13:48:13,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:13,617 INFO L93 Difference]: Finished difference Result 19755 states and 61167 transitions. [2021-06-05 13:48:13,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 13:48:13,617 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 13:48:13,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:13,646 INFO L225 Difference]: With dead ends: 19755 [2021-06-05 13:48:13,646 INFO L226 Difference]: Without dead ends: 19737 [2021-06-05 13:48:13,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2755 ImplicationChecksByTransitivity, 803.7ms TimeCoverageRelationStatistics Valid=2410, Invalid=6332, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 13:48:13,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19737 states. [2021-06-05 13:48:13,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19737 to 16856. [2021-06-05 13:48:13,944 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 13:48:13,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16856 states to 16856 states and 53619 transitions. [2021-06-05 13:48:13,979 INFO L78 Accepts]: Start accepts. Automaton has 16856 states and 53619 transitions. Word has length 24 [2021-06-05 13:48:13,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:13,980 INFO L482 AbstractCegarLoop]: Abstraction has 16856 states and 53619 transitions. [2021-06-05 13:48:13,980 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 13:48:13,980 INFO L276 IsEmpty]: Start isEmpty. Operand 16856 states and 53619 transitions. [2021-06-05 13:48:14,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:48:14,001 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:14,001 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:14,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable709,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:14,202 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:14,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:14,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1664943217, now seen corresponding path program 417 times [2021-06-05 13:48:14,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:14,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292386857] [2021-06-05 13:48:14,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:14,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:14,256 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 13:48:14,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:14,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292386857] [2021-06-05 13:48:14,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292386857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:14,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379125604] [2021-06-05 13:48:14,256 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 13:48:14,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:48:14,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:14,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:48:14,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:14,401 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 13:48:14,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379125604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:14,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:14,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-06-05 13:48:14,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923259930] [2021-06-05 13:48:14,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:48:14,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:14,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:48:14,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:48:14,402 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 13:48:15,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:15,297 INFO L93 Difference]: Finished difference Result 20000 states and 61915 transitions. [2021-06-05 13:48:15,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 13:48:15,297 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 13:48:15,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:15,328 INFO L225 Difference]: With dead ends: 20000 [2021-06-05 13:48:15,329 INFO L226 Difference]: Without dead ends: 19976 [2021-06-05 13:48:15,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2584 ImplicationChecksByTransitivity, 770.3ms TimeCoverageRelationStatistics Valid=2220, Invalid=5970, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 13:48:15,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19976 states. [2021-06-05 13:48:15,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19976 to 17037. [2021-06-05 13:48:15,560 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 13:48:15,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17037 states to 17037 states and 54207 transitions. [2021-06-05 13:48:15,591 INFO L78 Accepts]: Start accepts. Automaton has 17037 states and 54207 transitions. Word has length 24 [2021-06-05 13:48:15,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:15,591 INFO L482 AbstractCegarLoop]: Abstraction has 17037 states and 54207 transitions. [2021-06-05 13:48:15,591 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 13:48:15,591 INFO L276 IsEmpty]: Start isEmpty. Operand 17037 states and 54207 transitions. [2021-06-05 13:48:15,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:48:15,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:15,613 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:15,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable710 [2021-06-05 13:48:15,813 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:15,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:15,813 INFO L82 PathProgramCache]: Analyzing trace with hash 447485413, now seen corresponding path program 418 times [2021-06-05 13:48:15,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:15,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470011203] [2021-06-05 13:48:15,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:15,873 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 13:48:15,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:15,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470011203] [2021-06-05 13:48:15,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470011203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:15,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660409374] [2021-06-05 13:48:15,874 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 13:48:15,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:48:15,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:15,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:48:15,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:16,024 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 13:48:16,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660409374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:16,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:16,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-06-05 13:48:16,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310975917] [2021-06-05 13:48:16,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:48:16,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:16,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:48:16,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:48:16,025 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 13:48:16,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:16,816 INFO L93 Difference]: Finished difference Result 19762 states and 61367 transitions. [2021-06-05 13:48:16,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 13:48:16,817 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 13:48:16,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:16,842 INFO L225 Difference]: With dead ends: 19762 [2021-06-05 13:48:16,842 INFO L226 Difference]: Without dead ends: 19732 [2021-06-05 13:48:16,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2409 ImplicationChecksByTransitivity, 693.2ms TimeCoverageRelationStatistics Valid=2129, Invalid=5703, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 13:48:16,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19732 states. [2021-06-05 13:48:17,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19732 to 17071. [2021-06-05 13:48:17,165 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 13:48:17,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17071 states to 17071 states and 54326 transitions. [2021-06-05 13:48:17,204 INFO L78 Accepts]: Start accepts. Automaton has 17071 states and 54326 transitions. Word has length 24 [2021-06-05 13:48:17,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:17,204 INFO L482 AbstractCegarLoop]: Abstraction has 17071 states and 54326 transitions. [2021-06-05 13:48:17,204 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 13:48:17,204 INFO L276 IsEmpty]: Start isEmpty. Operand 17071 states and 54326 transitions. [2021-06-05 13:48:17,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:48:17,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:17,226 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:17,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable711,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:17,426 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:17,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:17,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1685657901, now seen corresponding path program 419 times [2021-06-05 13:48:17,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:17,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084173149] [2021-06-05 13:48:17,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:17,489 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 13:48:17,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:17,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084173149] [2021-06-05 13:48:17,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084173149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:17,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471011301] [2021-06-05 13:48:17,489 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 13:48:17,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:48:17,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:17,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:48:17,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:17,658 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 13:48:17,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471011301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:17,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:17,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 13:48:17,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449691039] [2021-06-05 13:48:17,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 13:48:17,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:17,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 13:48:17,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:48:17,659 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 13:48:18,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:18,530 INFO L93 Difference]: Finished difference Result 18326 states and 57555 transitions. [2021-06-05 13:48:18,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 13:48:18,530 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 13:48:18,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:18,556 INFO L225 Difference]: With dead ends: 18326 [2021-06-05 13:48:18,556 INFO L226 Difference]: Without dead ends: 18326 [2021-06-05 13:48:18,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1972 ImplicationChecksByTransitivity, 716.5ms TimeCoverageRelationStatistics Valid=1794, Invalid=4526, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 13:48:18,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18326 states. [2021-06-05 13:48:18,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18326 to 17148. [2021-06-05 13:48:18,771 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 13:48:18,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17148 states to 17148 states and 54506 transitions. [2021-06-05 13:48:18,805 INFO L78 Accepts]: Start accepts. Automaton has 17148 states and 54506 transitions. Word has length 24 [2021-06-05 13:48:18,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:18,805 INFO L482 AbstractCegarLoop]: Abstraction has 17148 states and 54506 transitions. [2021-06-05 13:48:18,805 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 13:48:18,805 INFO L276 IsEmpty]: Start isEmpty. Operand 17148 states and 54506 transitions. [2021-06-05 13:48:18,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:48:18,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:18,825 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:19,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable712 [2021-06-05 13:48:19,025 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:19,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:19,025 INFO L82 PathProgramCache]: Analyzing trace with hash 518617555, now seen corresponding path program 420 times [2021-06-05 13:48:19,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:19,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698780433] [2021-06-05 13:48:19,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:19,079 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 13:48:19,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:19,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698780433] [2021-06-05 13:48:19,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698780433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:19,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045435144] [2021-06-05 13:48:19,080 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 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 13:48:19,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:48:19,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:19,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:48:19,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:19,245 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 13:48:19,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045435144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:19,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:19,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-06-05 13:48:19,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991065159] [2021-06-05 13:48:19,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:48:19,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:19,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:48:19,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:48:19,246 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 13:48:19,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:20,000 INFO L93 Difference]: Finished difference Result 19278 states and 60184 transitions. [2021-06-05 13:48:20,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 13:48:20,000 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 13:48:20,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:20,025 INFO L225 Difference]: With dead ends: 19278 [2021-06-05 13:48:20,025 INFO L226 Difference]: Without dead ends: 19278 [2021-06-05 13:48:20,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 631.8ms TimeCoverageRelationStatistics Valid=1413, Invalid=3699, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 13:48:20,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19278 states. [2021-06-05 13:48:20,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19278 to 17371. [2021-06-05 13:48:20,263 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 13:48:20,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17371 states to 17371 states and 55190 transitions. [2021-06-05 13:48:20,300 INFO L78 Accepts]: Start accepts. Automaton has 17371 states and 55190 transitions. Word has length 24 [2021-06-05 13:48:20,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:20,300 INFO L482 AbstractCegarLoop]: Abstraction has 17371 states and 55190 transitions. [2021-06-05 13:48:20,300 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 13:48:20,300 INFO L276 IsEmpty]: Start isEmpty. Operand 17371 states and 55190 transitions. [2021-06-05 13:48:20,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:48:20,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:20,323 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:20,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:20,523 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:20,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:20,524 INFO L82 PathProgramCache]: Analyzing trace with hash 728270547, now seen corresponding path program 421 times [2021-06-05 13:48:20,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:20,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554676404] [2021-06-05 13:48:20,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:20,569 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 13:48:20,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:20,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554676404] [2021-06-05 13:48:20,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554676404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:20,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230562758] [2021-06-05 13:48:20,569 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 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 13:48:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:20,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:48:20,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:20,729 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 13:48:20,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230562758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:20,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:20,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-06-05 13:48:20,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679366913] [2021-06-05 13:48:20,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:48:20,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:20,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:48:20,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:48:20,730 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 13:48:21,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:21,499 INFO L93 Difference]: Finished difference Result 20178 states and 62903 transitions. [2021-06-05 13:48:21,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 13:48:21,499 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 13:48:21,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:21,533 INFO L225 Difference]: With dead ends: 20178 [2021-06-05 13:48:21,534 INFO L226 Difference]: Without dead ends: 20178 [2021-06-05 13:48:21,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 634.7ms TimeCoverageRelationStatistics Valid=1369, Invalid=3461, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 13:48:21,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20178 states. [2021-06-05 13:48:21,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20178 to 17685. [2021-06-05 13:48:21,785 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 13:48:21,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17685 states to 17685 states and 56209 transitions. [2021-06-05 13:48:21,819 INFO L78 Accepts]: Start accepts. Automaton has 17685 states and 56209 transitions. Word has length 24 [2021-06-05 13:48:21,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:21,819 INFO L482 AbstractCegarLoop]: Abstraction has 17685 states and 56209 transitions. [2021-06-05 13:48:21,819 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 13:48:21,819 INFO L276 IsEmpty]: Start isEmpty. Operand 17685 states and 56209 transitions. [2021-06-05 13:48:21,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:48:21,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:21,840 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:22,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:22,040 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:22,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:22,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1012128211, now seen corresponding path program 422 times [2021-06-05 13:48:22,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:22,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369122225] [2021-06-05 13:48:22,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:22,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:22,080 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 13:48:22,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:22,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369122225] [2021-06-05 13:48:22,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369122225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:22,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146659757] [2021-06-05 13:48:22,080 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 13:48:22,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:48:22,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:22,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:48:22,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:22,229 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 13:48:22,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146659757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:22,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:22,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2021-06-05 13:48:22,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255601445] [2021-06-05 13:48:22,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:48:22,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:22,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:48:22,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:48:22,230 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 13:48:22,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:22,978 INFO L93 Difference]: Finished difference Result 21110 states and 65699 transitions. [2021-06-05 13:48:22,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 13:48:22,979 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 13:48:22,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:23,012 INFO L225 Difference]: With dead ends: 21110 [2021-06-05 13:48:23,012 INFO L226 Difference]: Without dead ends: 21110 [2021-06-05 13:48:23,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 583.9ms TimeCoverageRelationStatistics Valid=1403, Invalid=3289, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 13:48:23,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21110 states. [2021-06-05 13:48:23,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21110 to 18003. [2021-06-05 13:48:23,293 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 13:48:23,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18003 states to 18003 states and 57259 transitions. [2021-06-05 13:48:23,333 INFO L78 Accepts]: Start accepts. Automaton has 18003 states and 57259 transitions. Word has length 24 [2021-06-05 13:48:23,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:23,333 INFO L482 AbstractCegarLoop]: Abstraction has 18003 states and 57259 transitions. [2021-06-05 13:48:23,333 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 13:48:23,333 INFO L276 IsEmpty]: Start isEmpty. Operand 18003 states and 57259 transitions. [2021-06-05 13:48:23,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:48:23,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:23,354 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:23,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable715,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:23,554 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:23,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:23,554 INFO L82 PathProgramCache]: Analyzing trace with hash -2026756397, now seen corresponding path program 423 times [2021-06-05 13:48:23,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:23,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98123363] [2021-06-05 13:48:23,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:23,590 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 13:48:23,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:23,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98123363] [2021-06-05 13:48:23,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98123363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:23,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605351163] [2021-06-05 13:48:23,591 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 13:48:23,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:48:23,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:23,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:48:23,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:23,738 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 13:48:23,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605351163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:23,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:23,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 23 [2021-06-05 13:48:23,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404846025] [2021-06-05 13:48:23,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:48:23,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:23,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:48:23,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:48:23,738 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 13:48:24,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:24,610 INFO L93 Difference]: Finished difference Result 22604 states and 70090 transitions. [2021-06-05 13:48:24,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 13:48:24,610 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 13:48:24,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:24,644 INFO L225 Difference]: With dead ends: 22604 [2021-06-05 13:48:24,645 INFO L226 Difference]: Without dead ends: 22604 [2021-06-05 13:48:24,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 627.5ms TimeCoverageRelationStatistics Valid=1595, Invalid=3375, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 13:48:24,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22604 states. [2021-06-05 13:48:24,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22604 to 18724. [2021-06-05 13:48:24,929 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 13:48:24,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18724 states to 18724 states and 59584 transitions. [2021-06-05 13:48:24,970 INFO L78 Accepts]: Start accepts. Automaton has 18724 states and 59584 transitions. Word has length 24 [2021-06-05 13:48:24,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:24,971 INFO L482 AbstractCegarLoop]: Abstraction has 18724 states and 59584 transitions. [2021-06-05 13:48:24,971 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 13:48:24,971 INFO L276 IsEmpty]: Start isEmpty. Operand 18724 states and 59584 transitions. [2021-06-05 13:48:24,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:48:24,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:24,995 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:25,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable716 [2021-06-05 13:48:25,195 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:25,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:25,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1893087699, now seen corresponding path program 424 times [2021-06-05 13:48:25,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:25,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302982104] [2021-06-05 13:48:25,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:25,229 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 13:48:25,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:25,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302982104] [2021-06-05 13:48:25,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302982104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:25,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747718421] [2021-06-05 13:48:25,230 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 13:48:25,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:48:25,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:25,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:48:25,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:25,366 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 13:48:25,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747718421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:25,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:25,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 22 [2021-06-05 13:48:25,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037269453] [2021-06-05 13:48:25,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:48:25,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:25,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:48:25,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:48:25,367 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 13:48:26,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:26,122 INFO L93 Difference]: Finished difference Result 26877 states and 83547 transitions. [2021-06-05 13:48:26,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 13:48:26,122 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 13:48:26,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:26,160 INFO L225 Difference]: With dead ends: 26877 [2021-06-05 13:48:26,160 INFO L226 Difference]: Without dead ends: 26877 [2021-06-05 13:48:26,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 576.2ms TimeCoverageRelationStatistics Valid=1679, Invalid=3151, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 13:48:26,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26877 states. [2021-06-05 13:48:26,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26877 to 23210. [2021-06-05 13:48:26,542 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 13:48:26,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23210 states to 23210 states and 74023 transitions. [2021-06-05 13:48:26,593 INFO L78 Accepts]: Start accepts. Automaton has 23210 states and 74023 transitions. Word has length 24 [2021-06-05 13:48:26,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:26,593 INFO L482 AbstractCegarLoop]: Abstraction has 23210 states and 74023 transitions. [2021-06-05 13:48:26,593 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 13:48:26,593 INFO L276 IsEmpty]: Start isEmpty. Operand 23210 states and 74023 transitions. [2021-06-05 13:48:26,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:48:26,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:26,621 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:26,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:26,821 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:26,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:26,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1830424791, now seen corresponding path program 425 times [2021-06-05 13:48:26,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:26,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925330316] [2021-06-05 13:48:26,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:26,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:26,877 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 13:48:26,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:26,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925330316] [2021-06-05 13:48:26,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925330316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:26,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520598023] [2021-06-05 13:48:26,878 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 13:48:26,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:48:26,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:26,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:48:26,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:27,016 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 13:48:27,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520598023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:27,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:27,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 22 [2021-06-05 13:48:27,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993685389] [2021-06-05 13:48:27,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:48:27,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:27,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:48:27,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:48:27,017 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 13:48:28,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:28,358 INFO L93 Difference]: Finished difference Result 25835 states and 80460 transitions. [2021-06-05 13:48:28,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 13:48:28,359 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 13:48:28,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:28,403 INFO L225 Difference]: With dead ends: 25835 [2021-06-05 13:48:28,403 INFO L226 Difference]: Without dead ends: 25829 [2021-06-05 13:48:28,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4960 ImplicationChecksByTransitivity, 1101.7ms TimeCoverageRelationStatistics Valid=3452, Invalid=8980, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 13:48:28,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25829 states. [2021-06-05 13:48:28,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25829 to 23125. [2021-06-05 13:48:28,793 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 13:48:28,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23125 states to 23125 states and 73717 transitions. [2021-06-05 13:48:28,837 INFO L78 Accepts]: Start accepts. Automaton has 23125 states and 73717 transitions. Word has length 24 [2021-06-05 13:48:28,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:28,837 INFO L482 AbstractCegarLoop]: Abstraction has 23125 states and 73717 transitions. [2021-06-05 13:48:28,837 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 13:48:28,838 INFO L276 IsEmpty]: Start isEmpty. Operand 23125 states and 73717 transitions. [2021-06-05 13:48:28,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:48:28,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:28,862 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:29,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:29,062 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:29,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:29,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1295194989, now seen corresponding path program 426 times [2021-06-05 13:48:29,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:29,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466241010] [2021-06-05 13:48:29,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:29,101 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 13:48:29,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:29,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466241010] [2021-06-05 13:48:29,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466241010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:29,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572372658] [2021-06-05 13:48:29,101 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 13:48:29,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:48:29,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:29,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:48:29,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:29,240 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 13:48:29,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572372658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:29,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:29,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 23 [2021-06-05 13:48:29,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672333138] [2021-06-05 13:48:29,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:48:29,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:29,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:48:29,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:48:29,241 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 13:48:30,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:30,423 INFO L93 Difference]: Finished difference Result 25817 states and 80521 transitions. [2021-06-05 13:48:30,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 13:48:30,423 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 13:48:30,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:30,468 INFO L225 Difference]: With dead ends: 25817 [2021-06-05 13:48:30,468 INFO L226 Difference]: Without dead ends: 25805 [2021-06-05 13:48:30,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4219 ImplicationChecksByTransitivity, 948.6ms TimeCoverageRelationStatistics Valid=2955, Invalid=7965, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 13:48:30,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25805 states. [2021-06-05 13:48:30,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25805 to 23100. [2021-06-05 13:48:30,820 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 13:48:30,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23100 states to 23100 states and 73652 transitions. [2021-06-05 13:48:30,862 INFO L78 Accepts]: Start accepts. Automaton has 23100 states and 73652 transitions. Word has length 24 [2021-06-05 13:48:30,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:30,862 INFO L482 AbstractCegarLoop]: Abstraction has 23100 states and 73652 transitions. [2021-06-05 13:48:30,862 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 13:48:30,862 INFO L276 IsEmpty]: Start isEmpty. Operand 23100 states and 73652 transitions. [2021-06-05 13:48:30,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:48:30,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:30,888 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:31,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable719,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:31,088 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:31,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:31,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1882940311, now seen corresponding path program 427 times [2021-06-05 13:48:31,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:31,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426710539] [2021-06-05 13:48:31,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:31,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:31,235 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 13:48:31,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:31,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426710539] [2021-06-05 13:48:31,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426710539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:31,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274768958] [2021-06-05 13:48:31,236 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 13:48:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:31,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:48:31,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:31,380 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 13:48:31,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274768958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:31,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:31,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2021-06-05 13:48:31,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999860769] [2021-06-05 13:48:31,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:48:31,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:31,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:48:31,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:48:31,381 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 13:48:32,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:32,426 INFO L93 Difference]: Finished difference Result 25937 states and 80963 transitions. [2021-06-05 13:48:32,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 13:48:32,426 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 13:48:32,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:32,463 INFO L225 Difference]: With dead ends: 25937 [2021-06-05 13:48:32,463 INFO L226 Difference]: Without dead ends: 25919 [2021-06-05 13:48:32,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3615 ImplicationChecksByTransitivity, 965.2ms TimeCoverageRelationStatistics Valid=2546, Invalid=7156, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 13:48:32,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25919 states. [2021-06-05 13:48:32,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25919 to 23155. [2021-06-05 13:48:32,814 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 13:48:32,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23155 states to 23155 states and 73842 transitions. [2021-06-05 13:48:32,863 INFO L78 Accepts]: Start accepts. Automaton has 23155 states and 73842 transitions. Word has length 24 [2021-06-05 13:48:32,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:32,863 INFO L482 AbstractCegarLoop]: Abstraction has 23155 states and 73842 transitions. [2021-06-05 13:48:32,863 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 13:48:32,863 INFO L276 IsEmpty]: Start isEmpty. Operand 23155 states and 73842 transitions. [2021-06-05 13:48:32,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:48:32,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:32,889 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:33,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable720 [2021-06-05 13:48:33,089 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:33,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:33,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1371791187, now seen corresponding path program 428 times [2021-06-05 13:48:33,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:33,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597092152] [2021-06-05 13:48:33,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:33,138 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 13:48:33,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:33,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597092152] [2021-06-05 13:48:33,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597092152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:33,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171480042] [2021-06-05 13:48:33,139 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 13:48:33,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:48:33,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:33,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:48:33,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:33,289 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 13:48:33,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171480042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:33,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:33,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-06-05 13:48:33,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184846931] [2021-06-05 13:48:33,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:48:33,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:33,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:48:33,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:48:33,290 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 13:48:34,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:34,253 INFO L93 Difference]: Finished difference Result 26264 states and 82006 transitions. [2021-06-05 13:48:34,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 13:48:34,254 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 13:48:34,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:34,290 INFO L225 Difference]: With dead ends: 26264 [2021-06-05 13:48:34,290 INFO L226 Difference]: Without dead ends: 26240 [2021-06-05 13:48:34,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3134 ImplicationChecksByTransitivity, 816.5ms TimeCoverageRelationStatistics Valid=2232, Invalid=6510, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 13:48:34,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26240 states. [2021-06-05 13:48:34,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26240 to 23691. [2021-06-05 13:48:34,732 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 13:48:34,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23691 states to 23691 states and 75591 transitions. [2021-06-05 13:48:34,783 INFO L78 Accepts]: Start accepts. Automaton has 23691 states and 75591 transitions. Word has length 24 [2021-06-05 13:48:34,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:34,784 INFO L482 AbstractCegarLoop]: Abstraction has 23691 states and 75591 transitions. [2021-06-05 13:48:34,784 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 13:48:34,784 INFO L276 IsEmpty]: Start isEmpty. Operand 23691 states and 75591 transitions. [2021-06-05 13:48:34,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:48:34,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:34,812 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:35,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable721 [2021-06-05 13:48:35,013 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:35,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:35,013 INFO L82 PathProgramCache]: Analyzing trace with hash -810747479, now seen corresponding path program 429 times [2021-06-05 13:48:35,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:35,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341145731] [2021-06-05 13:48:35,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:35,069 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 13:48:35,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:35,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341145731] [2021-06-05 13:48:35,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341145731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:35,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066631762] [2021-06-05 13:48:35,069 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 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 13:48:35,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:48:35,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:35,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:48:35,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:35,223 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 13:48:35,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066631762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:35,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:35,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-06-05 13:48:35,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688971776] [2021-06-05 13:48:35,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:48:35,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:35,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:48:35,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:48:35,224 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 13:48:36,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:36,154 INFO L93 Difference]: Finished difference Result 26956 states and 84218 transitions. [2021-06-05 13:48:36,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 13:48:36,155 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 13:48:36,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:36,200 INFO L225 Difference]: With dead ends: 26956 [2021-06-05 13:48:36,200 INFO L226 Difference]: Without dead ends: 26926 [2021-06-05 13:48:36,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 777.5ms TimeCoverageRelationStatistics Valid=2019, Invalid=5991, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 13:48:36,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26926 states. [2021-06-05 13:48:36,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26926 to 24343. [2021-06-05 13:48:36,586 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 13:48:36,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24343 states to 24343 states and 77703 transitions. [2021-06-05 13:48:36,645 INFO L78 Accepts]: Start accepts. Automaton has 24343 states and 77703 transitions. Word has length 24 [2021-06-05 13:48:36,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:36,645 INFO L482 AbstractCegarLoop]: Abstraction has 24343 states and 77703 transitions. [2021-06-05 13:48:36,645 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 13:48:36,645 INFO L276 IsEmpty]: Start isEmpty. Operand 24343 states and 77703 transitions. [2021-06-05 13:48:36,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:48:36,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:36,677 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:36,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable722 [2021-06-05 13:48:36,878 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:36,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:36,878 INFO L82 PathProgramCache]: Analyzing trace with hash 250030611, now seen corresponding path program 430 times [2021-06-05 13:48:36,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:36,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600686777] [2021-06-05 13:48:36,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:36,944 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 13:48:36,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:36,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600686777] [2021-06-05 13:48:36,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600686777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:36,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595175770] [2021-06-05 13:48:36,944 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 13:48:36,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:48:36,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:36,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:48:36,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:37,148 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 13:48:37,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595175770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:37,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:37,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 13:48:37,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060823099] [2021-06-05 13:48:37,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 13:48:37,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:37,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 13:48:37,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:48:37,149 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 13:48:38,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:38,032 INFO L93 Difference]: Finished difference Result 26813 states and 84024 transitions. [2021-06-05 13:48:38,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 13:48:38,032 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 13:48:38,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:38,075 INFO L225 Difference]: With dead ends: 26813 [2021-06-05 13:48:38,076 INFO L226 Difference]: Without dead ends: 26777 [2021-06-05 13:48:38,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2479 ImplicationChecksByTransitivity, 744.9ms TimeCoverageRelationStatistics Valid=1912, Invalid=5570, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 13:48:38,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26777 states. [2021-06-05 13:48:38,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26777 to 24407. [2021-06-05 13:48:38,452 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 13:48:38,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24407 states to 24407 states and 77898 transitions. [2021-06-05 13:48:38,512 INFO L78 Accepts]: Start accepts. Automaton has 24407 states and 77898 transitions. Word has length 24 [2021-06-05 13:48:38,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:38,512 INFO L482 AbstractCegarLoop]: Abstraction has 24407 states and 77898 transitions. [2021-06-05 13:48:38,512 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 13:48:38,512 INFO L276 IsEmpty]: Start isEmpty. Operand 24407 states and 77898 transitions. [2021-06-05 13:48:38,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:38,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:38,545 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:38,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable723,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:38,745 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:38,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:38,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1425864693, now seen corresponding path program 431 times [2021-06-05 13:48:38,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:38,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154871296] [2021-06-05 13:48:38,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:38,903 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 13:48:38,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:38,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154871296] [2021-06-05 13:48:38,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154871296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:38,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100976243] [2021-06-05 13:48:38,904 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 13:48:38,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:48:38,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:38,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:48:38,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:39,074 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 13:48:39,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100976243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:39,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:39,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 13:48:39,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232420336] [2021-06-05 13:48:39,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:48:39,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:39,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:48:39,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:48:39,075 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 13:48:39,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:39,626 INFO L93 Difference]: Finished difference Result 24899 states and 78823 transitions. [2021-06-05 13:48:39,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:48:39,627 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 13:48:39,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:39,664 INFO L225 Difference]: With dead ends: 24899 [2021-06-05 13:48:39,664 INFO L226 Difference]: Without dead ends: 24867 [2021-06-05 13:48:39,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 397.1ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:48:39,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24867 states. [2021-06-05 13:48:39,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24867 to 24479. [2021-06-05 13:48:40,023 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 13:48:40,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24479 states to 24479 states and 77966 transitions. [2021-06-05 13:48:40,082 INFO L78 Accepts]: Start accepts. Automaton has 24479 states and 77966 transitions. Word has length 25 [2021-06-05 13:48:40,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:40,083 INFO L482 AbstractCegarLoop]: Abstraction has 24479 states and 77966 transitions. [2021-06-05 13:48:40,083 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 13:48:40,083 INFO L276 IsEmpty]: Start isEmpty. Operand 24479 states and 77966 transitions. [2021-06-05 13:48:40,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:40,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:40,117 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:40,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:40,317 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:40,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:40,318 INFO L82 PathProgramCache]: Analyzing trace with hash 983845119, now seen corresponding path program 432 times [2021-06-05 13:48:40,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:40,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985960046] [2021-06-05 13:48:40,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:40,469 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 13:48:40,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:40,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985960046] [2021-06-05 13:48:40,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985960046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:40,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592374652] [2021-06-05 13:48:40,469 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 13:48:40,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:48:40,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:40,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:48:40,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:40,657 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 13:48:40,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592374652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:40,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:40,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-06-05 13:48:40,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838777382] [2021-06-05 13:48:40,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:48:40,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:40,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:48:40,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:48:40,658 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 13:48:41,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:41,102 INFO L93 Difference]: Finished difference Result 25039 states and 79187 transitions. [2021-06-05 13:48:41,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:48:41,102 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 13:48:41,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:41,131 INFO L225 Difference]: With dead ends: 25039 [2021-06-05 13:48:41,131 INFO L226 Difference]: Without dead ends: 25032 [2021-06-05 13:48:41,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 309.8ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:48:41,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25032 states. [2021-06-05 13:48:41,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25032 to 24640. [2021-06-05 13:48:41,462 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 13:48:41,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24640 states to 24640 states and 78524 transitions. [2021-06-05 13:48:41,517 INFO L78 Accepts]: Start accepts. Automaton has 24640 states and 78524 transitions. Word has length 25 [2021-06-05 13:48:41,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:41,517 INFO L482 AbstractCegarLoop]: Abstraction has 24640 states and 78524 transitions. [2021-06-05 13:48:41,517 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 13:48:41,517 INFO L276 IsEmpty]: Start isEmpty. Operand 24640 states and 78524 transitions. [2021-06-05 13:48:41,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:41,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:41,547 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:41,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable727,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:41,748 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:41,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:41,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1696419453, now seen corresponding path program 433 times [2021-06-05 13:48:41,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:41,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370322770] [2021-06-05 13:48:41,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:41,897 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 13:48:41,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:41,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370322770] [2021-06-05 13:48:41,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370322770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:41,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730827493] [2021-06-05 13:48:41,897 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 13:48:41,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:41,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:48:41,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:42,080 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 13:48:42,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730827493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:42,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:42,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-06-05 13:48:42,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236618181] [2021-06-05 13:48:42,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:48:42,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:42,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:48:42,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:48:42,081 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 13:48:42,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:42,510 INFO L93 Difference]: Finished difference Result 25025 states and 79167 transitions. [2021-06-05 13:48:42,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:48:42,510 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 13:48:42,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:42,550 INFO L225 Difference]: With dead ends: 25025 [2021-06-05 13:48:42,550 INFO L226 Difference]: Without dead ends: 25009 [2021-06-05 13:48:42,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 324.2ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:48:42,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25009 states. [2021-06-05 13:48:42,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25009 to 24488. [2021-06-05 13:48:42,883 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 13:48:42,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-06-05 13:48:42,936 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-06-05 13:48:42,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:42,936 INFO L482 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-06-05 13:48:42,936 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 13:48:42,936 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-06-05 13:48:42,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:42,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:42,965 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:43,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-06-05 13:48:43,165 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:43,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:43,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1555299925, now seen corresponding path program 434 times [2021-06-05 13:48:43,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:43,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955012931] [2021-06-05 13:48:43,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:43,308 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 13:48:43,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:43,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955012931] [2021-06-05 13:48:43,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955012931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:43,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370707156] [2021-06-05 13:48:43,309 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 13:48:43,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:48:43,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:43,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:48:43,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:43,495 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 13:48:43,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370707156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:43,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:43,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 13:48:43,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41337858] [2021-06-05 13:48:43,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:48:43,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:43,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:48:43,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:48:43,496 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 13:48:43,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:43,891 INFO L93 Difference]: Finished difference Result 24884 states and 78643 transitions. [2021-06-05 13:48:43,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:48:43,891 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 13:48:43,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:43,927 INFO L225 Difference]: With dead ends: 24884 [2021-06-05 13:48:43,928 INFO L226 Difference]: Without dead ends: 24877 [2021-06-05 13:48:43,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 311.7ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:48:43,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24877 states. [2021-06-05 13:48:44,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24877 to 24488. [2021-06-05 13:48:44,332 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 13:48:44,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-06-05 13:48:44,387 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-06-05 13:48:44,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:44,387 INFO L482 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-06-05 13:48:44,387 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 13:48:44,387 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-06-05 13:48:44,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:44,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:44,416 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:44,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable733 [2021-06-05 13:48:44,617 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:44,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:44,617 INFO L82 PathProgramCache]: Analyzing trace with hash 2090529727, now seen corresponding path program 435 times [2021-06-05 13:48:44,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:44,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154951336] [2021-06-05 13:48:44,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:44,772 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 13:48:44,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:44,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154951336] [2021-06-05 13:48:44,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154951336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:44,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572887725] [2021-06-05 13:48:44,772 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 13:48:44,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:48:44,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:44,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:48:44,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:44,958 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 13:48:44,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572887725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:44,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:44,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 13:48:44,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163872179] [2021-06-05 13:48:44,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:48:44,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:44,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:48:44,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:48:44,958 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 13:48:45,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:45,423 INFO L93 Difference]: Finished difference Result 24901 states and 78668 transitions. [2021-06-05 13:48:45,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:48:45,423 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 13:48:45,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:45,462 INFO L225 Difference]: With dead ends: 24901 [2021-06-05 13:48:45,462 INFO L226 Difference]: Without dead ends: 24894 [2021-06-05 13:48:45,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 326.6ms TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:48:45,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24894 states. [2021-06-05 13:48:45,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24894 to 24488. [2021-06-05 13:48:45,816 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 13:48:45,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-06-05 13:48:45,867 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-06-05 13:48:45,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:45,867 INFO L482 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-06-05 13:48:45,867 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 13:48:45,867 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-06-05 13:48:45,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:45,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:45,895 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:46,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:46,096 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:46,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:46,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1502784405, now seen corresponding path program 436 times [2021-06-05 13:48:46,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:46,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359926492] [2021-06-05 13:48:46,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:46,256 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 13:48:46,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:46,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359926492] [2021-06-05 13:48:46,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359926492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:46,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558875375] [2021-06-05 13:48:46,256 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 13:48:46,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:48:46,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:46,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:48:46,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:46,428 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 13:48:46,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558875375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:46,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:46,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 13:48:46,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252230012] [2021-06-05 13:48:46,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:48:46,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:46,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:48:46,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:48:46,429 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 13:48:46,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:46,925 INFO L93 Difference]: Finished difference Result 24921 states and 78698 transitions. [2021-06-05 13:48:46,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:48:46,925 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 13:48:46,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:46,971 INFO L225 Difference]: With dead ends: 24921 [2021-06-05 13:48:46,972 INFO L226 Difference]: Without dead ends: 24914 [2021-06-05 13:48:46,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 345.6ms TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:48:46,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24914 states. [2021-06-05 13:48:47,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24914 to 24488. [2021-06-05 13:48:47,466 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 13:48:47,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-06-05 13:48:47,520 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-06-05 13:48:47,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:47,520 INFO L482 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-06-05 13:48:47,520 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 13:48:47,520 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-06-05 13:48:47,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:47,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:47,548 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:47,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:47,748 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:47,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:47,749 INFO L82 PathProgramCache]: Analyzing trace with hash 462548607, now seen corresponding path program 437 times [2021-06-05 13:48:47,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:47,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054186441] [2021-06-05 13:48:47,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:47,912 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 13:48:47,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:47,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054186441] [2021-06-05 13:48:47,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054186441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:47,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940537761] [2021-06-05 13:48:47,913 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 13:48:47,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:48:47,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:47,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:48:47,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:48,112 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 13:48:48,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940537761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:48,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:48,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 13:48:48,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903721781] [2021-06-05 13:48:48,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:48:48,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:48,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:48:48,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:48:48,113 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 13:48:48,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:48,647 INFO L93 Difference]: Finished difference Result 24944 states and 78733 transitions. [2021-06-05 13:48:48,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:48:48,648 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 13:48:48,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:48,689 INFO L225 Difference]: With dead ends: 24944 [2021-06-05 13:48:48,689 INFO L226 Difference]: Without dead ends: 24937 [2021-06-05 13:48:48,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 401.0ms TimeCoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:48:48,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24937 states. [2021-06-05 13:48:49,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24937 to 24488. [2021-06-05 13:48:49,059 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 13:48:49,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-06-05 13:48:49,117 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-06-05 13:48:49,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:49,117 INFO L482 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-06-05 13:48:49,117 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 13:48:49,118 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-06-05 13:48:49,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:49,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:49,150 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:49,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-06-05 13:48:49,350 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:49,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:49,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1719990059, now seen corresponding path program 438 times [2021-06-05 13:48:49,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:49,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712999021] [2021-06-05 13:48:49,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:49,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:49,505 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 13:48:49,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:49,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712999021] [2021-06-05 13:48:49,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712999021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:49,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862650265] [2021-06-05 13:48:49,505 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 13:48:49,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:48:49,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:49,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:48:49,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:49,679 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 13:48:49,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862650265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:49,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:49,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 13:48:49,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977265221] [2021-06-05 13:48:49,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:48:49,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:49,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:48:49,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:48:49,679 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 13:48:50,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:50,315 INFO L93 Difference]: Finished difference Result 24802 states and 78491 transitions. [2021-06-05 13:48:50,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:48:50,315 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 13:48:50,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:50,354 INFO L225 Difference]: With dead ends: 24802 [2021-06-05 13:48:50,355 INFO L226 Difference]: Without dead ends: 24795 [2021-06-05 13:48:50,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 373.4ms TimeCoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:48:50,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24795 states. [2021-06-05 13:48:50,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24795 to 24488. [2021-06-05 13:48:50,700 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 13:48:50,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-06-05 13:48:50,900 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-06-05 13:48:50,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:50,900 INFO L482 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-06-05 13:48:50,900 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 13:48:50,900 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-06-05 13:48:50,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:50,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:50,933 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:51,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable745,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:51,134 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:51,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:51,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1617763643, now seen corresponding path program 439 times [2021-06-05 13:48:51,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:51,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827387317] [2021-06-05 13:48:51,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:51,303 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 13:48:51,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:51,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827387317] [2021-06-05 13:48:51,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827387317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:51,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465149761] [2021-06-05 13:48:51,303 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 13:48:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:51,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:48:51,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:51,565 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 13:48:51,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465149761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:51,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:51,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 23 [2021-06-05 13:48:51,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874879022] [2021-06-05 13:48:51,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:48:51,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:51,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:48:51,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:48:51,566 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 13:48:51,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:51,918 INFO L93 Difference]: Finished difference Result 25074 states and 79435 transitions. [2021-06-05 13:48:51,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:48:51,918 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 13:48:51,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:51,962 INFO L225 Difference]: With dead ends: 25074 [2021-06-05 13:48:51,962 INFO L226 Difference]: Without dead ends: 25067 [2021-06-05 13:48:51,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 398.2ms TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:48:51,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25067 states. [2021-06-05 13:48:52,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25067 to 24661. [2021-06-05 13:48:52,323 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 13:48:52,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 78598 transitions. [2021-06-05 13:48:52,377 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 78598 transitions. Word has length 25 [2021-06-05 13:48:52,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:52,378 INFO L482 AbstractCegarLoop]: Abstraction has 24661 states and 78598 transitions. [2021-06-05 13:48:52,378 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 13:48:52,378 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 78598 transitions. [2021-06-05 13:48:52,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:52,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:52,406 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:52,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable748,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:52,607 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:52,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:52,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1062500929, now seen corresponding path program 440 times [2021-06-05 13:48:52,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:52,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965159361] [2021-06-05 13:48:52,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:52,757 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 13:48:52,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:52,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965159361] [2021-06-05 13:48:52,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965159361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:52,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880687043] [2021-06-05 13:48:52,757 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 13:48:52,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:48:52,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:52,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:48:52,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:53,007 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 13:48:53,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880687043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:53,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:53,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 23 [2021-06-05 13:48:53,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114566795] [2021-06-05 13:48:53,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:48:53,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:53,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:48:53,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:48:53,008 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 13:48:53,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:53,350 INFO L93 Difference]: Finished difference Result 25075 states and 79432 transitions. [2021-06-05 13:48:53,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:48:53,350 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 13:48:53,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:53,393 INFO L225 Difference]: With dead ends: 25075 [2021-06-05 13:48:53,393 INFO L226 Difference]: Without dead ends: 25066 [2021-06-05 13:48:53,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 362.4ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:48:53,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25066 states. [2021-06-05 13:48:53,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25066 to 24661. [2021-06-05 13:48:53,768 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 13:48:53,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 78592 transitions. [2021-06-05 13:48:53,828 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 78592 transitions. Word has length 25 [2021-06-05 13:48:53,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:53,828 INFO L482 AbstractCegarLoop]: Abstraction has 24661 states and 78592 transitions. [2021-06-05 13:48:53,828 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 13:48:53,828 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 78592 transitions. [2021-06-05 13:48:53,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:53,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:53,858 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:54,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-06-05 13:48:54,058 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:54,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:54,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1153172539, now seen corresponding path program 441 times [2021-06-05 13:48:54,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:54,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446590190] [2021-06-05 13:48:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:54,200 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 13:48:54,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:54,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446590190] [2021-06-05 13:48:54,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446590190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:54,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893284648] [2021-06-05 13:48:54,200 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 13:48:54,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:48:54,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:54,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:48:54,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:54,443 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 13:48:54,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893284648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:54,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:54,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-06-05 13:48:54,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233714082] [2021-06-05 13:48:54,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:48:54,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:54,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:48:54,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:48:54,444 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 13:48:54,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:54,794 INFO L93 Difference]: Finished difference Result 24947 states and 79111 transitions. [2021-06-05 13:48:54,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:48:54,795 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 13:48:54,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:54,923 INFO L225 Difference]: With dead ends: 24947 [2021-06-05 13:48:54,923 INFO L226 Difference]: Without dead ends: 24940 [2021-06-05 13:48:54,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 354.9ms TimeCoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:48:54,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24940 states. [2021-06-05 13:48:55,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24940 to 24661. [2021-06-05 13:48:55,240 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 13:48:55,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 78592 transitions. [2021-06-05 13:48:55,287 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 78592 transitions. Word has length 25 [2021-06-05 13:48:55,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:55,287 INFO L482 AbstractCegarLoop]: Abstraction has 24661 states and 78592 transitions. [2021-06-05 13:48:55,287 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 13:48:55,288 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 78592 transitions. [2021-06-05 13:48:55,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:55,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:55,313 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:55,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable754 [2021-06-05 13:48:55,514 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:55,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:55,514 INFO L82 PathProgramCache]: Analyzing trace with hash -205598593, now seen corresponding path program 442 times [2021-06-05 13:48:55,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:55,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507903311] [2021-06-05 13:48:55,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:55,665 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 13:48:55,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:55,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507903311] [2021-06-05 13:48:55,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507903311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:55,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758813492] [2021-06-05 13:48:55,665 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 13:48:55,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:48:55,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:55,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:48:55,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:55,865 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 13:48:55,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758813492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:55,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:55,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2021-06-05 13:48:55,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956475973] [2021-06-05 13:48:55,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:48:55,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:55,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:48:55,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:48:55,865 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 13:48:56,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:56,261 INFO L93 Difference]: Finished difference Result 25694 states and 81409 transitions. [2021-06-05 13:48:56,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:48:56,261 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 13:48:56,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:56,304 INFO L225 Difference]: With dead ends: 25694 [2021-06-05 13:48:56,304 INFO L226 Difference]: Without dead ends: 25677 [2021-06-05 13:48:56,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 339.4ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:48:56,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25677 states. [2021-06-05 13:48:56,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25677 to 25073. [2021-06-05 13:48:56,698 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 13:48:56,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25073 states to 25073 states and 80040 transitions. [2021-06-05 13:48:56,758 INFO L78 Accepts]: Start accepts. Automaton has 25073 states and 80040 transitions. Word has length 25 [2021-06-05 13:48:56,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:56,758 INFO L482 AbstractCegarLoop]: Abstraction has 25073 states and 80040 transitions. [2021-06-05 13:48:56,758 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 13:48:56,758 INFO L276 IsEmpty]: Start isEmpty. Operand 25073 states and 80040 transitions. [2021-06-05 13:48:56,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:56,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:56,790 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:57,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:57,001 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:57,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:57,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1409104131, now seen corresponding path program 443 times [2021-06-05 13:48:57,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:57,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892085434] [2021-06-05 13:48:57,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:57,151 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 13:48:57,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:57,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892085434] [2021-06-05 13:48:57,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892085434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:57,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380469159] [2021-06-05 13:48:57,152 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 13:48:57,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:48:57,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:57,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:48:57,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:57,352 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 13:48:57,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380469159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:57,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:57,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2021-06-05 13:48:57,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684630367] [2021-06-05 13:48:57,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:48:57,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:57,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:48:57,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:48:57,353 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 13:48:57,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:57,755 INFO L93 Difference]: Finished difference Result 25700 states and 81360 transitions. [2021-06-05 13:48:57,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:48:57,755 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 13:48:57,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:57,801 INFO L225 Difference]: With dead ends: 25700 [2021-06-05 13:48:57,801 INFO L226 Difference]: Without dead ends: 25682 [2021-06-05 13:48:57,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 341.1ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:48:57,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25682 states. [2021-06-05 13:48:58,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25682 to 24970. [2021-06-05 13:48:58,174 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 13:48:58,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24970 states to 24970 states and 79619 transitions. [2021-06-05 13:48:58,363 INFO L78 Accepts]: Start accepts. Automaton has 24970 states and 79619 transitions. Word has length 25 [2021-06-05 13:48:58,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:58,363 INFO L482 AbstractCegarLoop]: Abstraction has 24970 states and 79619 transitions. [2021-06-05 13:48:58,363 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 13:48:58,363 INFO L276 IsEmpty]: Start isEmpty. Operand 24970 states and 79619 transitions. [2021-06-05 13:48:58,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:58,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:58,390 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:58,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable760 [2021-06-05 13:48:58,591 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:58,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:58,591 INFO L82 PathProgramCache]: Analyzing trace with hash -670189697, now seen corresponding path program 444 times [2021-06-05 13:48:58,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:58,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746091394] [2021-06-05 13:48:58,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:58,734 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 13:48:58,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:58,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746091394] [2021-06-05 13:48:58,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746091394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:58,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890084501] [2021-06-05 13:48:58,734 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 13:48:58,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:48:58,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:58,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:48:58,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:58,959 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 13:48:58,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890084501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:58,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:58,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-06-05 13:48:58,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025947155] [2021-06-05 13:48:58,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:48:58,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:58,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:48:58,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:48:58,960 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 13:48:59,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:59,378 INFO L93 Difference]: Finished difference Result 25480 states and 80657 transitions. [2021-06-05 13:48:59,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:48:59,378 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 13:48:59,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:59,423 INFO L225 Difference]: With dead ends: 25480 [2021-06-05 13:48:59,424 INFO L226 Difference]: Without dead ends: 25458 [2021-06-05 13:48:59,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 366.2ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:48:59,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25458 states. [2021-06-05 13:48:59,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25458 to 24939. [2021-06-05 13:48:59,819 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 13:48:59,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24939 states to 24939 states and 79517 transitions. [2021-06-05 13:48:59,870 INFO L78 Accepts]: Start accepts. Automaton has 24939 states and 79517 transitions. Word has length 25 [2021-06-05 13:48:59,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:59,870 INFO L482 AbstractCegarLoop]: Abstraction has 24939 states and 79517 transitions. [2021-06-05 13:48:59,870 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 13:48:59,870 INFO L276 IsEmpty]: Start isEmpty. Operand 24939 states and 79517 transitions. [2021-06-05 13:48:59,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:59,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:59,897 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:00,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable763 [2021-06-05 13:49:00,097 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:00,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:00,097 INFO L82 PathProgramCache]: Analyzing trace with hash -703788925, now seen corresponding path program 445 times [2021-06-05 13:49:00,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:00,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592839229] [2021-06-05 13:49:00,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:00,242 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 13:49:00,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:00,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592839229] [2021-06-05 13:49:00,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592839229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:00,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483830644] [2021-06-05 13:49:00,242 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 13:49:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:00,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:00,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:00,468 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 13:49:00,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483830644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:00,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:00,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-06-05 13:49:00,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125394301] [2021-06-05 13:49:00,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:49:00,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:00,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:49:00,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:00,469 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 13:49:00,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:00,856 INFO L93 Difference]: Finished difference Result 25309 states and 80217 transitions. [2021-06-05 13:49:00,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:49:00,857 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 13:49:00,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:00,891 INFO L225 Difference]: With dead ends: 25309 [2021-06-05 13:49:00,891 INFO L226 Difference]: Without dead ends: 25302 [2021-06-05 13:49:00,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 351.5ms TimeCoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:49:00,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25302 states. [2021-06-05 13:49:01,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25302 to 24939. [2021-06-05 13:49:01,243 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 13:49:01,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24939 states to 24939 states and 79517 transitions. [2021-06-05 13:49:01,302 INFO L78 Accepts]: Start accepts. Automaton has 24939 states and 79517 transitions. Word has length 25 [2021-06-05 13:49:01,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:01,302 INFO L482 AbstractCegarLoop]: Abstraction has 24939 states and 79517 transitions. [2021-06-05 13:49:01,302 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 13:49:01,302 INFO L276 IsEmpty]: Start isEmpty. Operand 24939 states and 79517 transitions. [2021-06-05 13:49:01,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:01,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:01,333 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:01,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable766,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:01,534 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:01,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:01,534 INFO L82 PathProgramCache]: Analyzing trace with hash 323843797, now seen corresponding path program 446 times [2021-06-05 13:49:01,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:01,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931263822] [2021-06-05 13:49:01,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:01,673 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 13:49:01,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:01,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931263822] [2021-06-05 13:49:01,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931263822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:01,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377120010] [2021-06-05 13:49:01,674 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 13:49:01,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:49:01,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:01,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:01,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:01,894 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 13:49:01,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377120010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:01,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:01,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-06-05 13:49:01,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377147972] [2021-06-05 13:49:01,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:49:01,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:01,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:49:01,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:01,895 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 13:49:02,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:02,282 INFO L93 Difference]: Finished difference Result 25226 states and 80018 transitions. [2021-06-05 13:49:02,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:49:02,282 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 13:49:02,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:02,325 INFO L225 Difference]: With dead ends: 25226 [2021-06-05 13:49:02,326 INFO L226 Difference]: Without dead ends: 25213 [2021-06-05 13:49:02,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 329.6ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:49:02,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25213 states. [2021-06-05 13:49:02,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25213 to 24914. [2021-06-05 13:49:02,675 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 13:49:02,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24914 states to 24914 states and 79416 transitions. [2021-06-05 13:49:02,724 INFO L78 Accepts]: Start accepts. Automaton has 24914 states and 79416 transitions. Word has length 25 [2021-06-05 13:49:02,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:02,724 INFO L482 AbstractCegarLoop]: Abstraction has 24914 states and 79416 transitions. [2021-06-05 13:49:02,724 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 13:49:02,724 INFO L276 IsEmpty]: Start isEmpty. Operand 24914 states and 79416 transitions. [2021-06-05 13:49:02,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:02,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:02,750 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:02,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable769,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:02,951 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:02,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:02,951 INFO L82 PathProgramCache]: Analyzing trace with hash -895253061, now seen corresponding path program 447 times [2021-06-05 13:49:02,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:02,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345011597] [2021-06-05 13:49:02,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:03,100 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 13:49:03,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:03,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345011597] [2021-06-05 13:49:03,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345011597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:03,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750638336] [2021-06-05 13:49:03,101 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 13:49:03,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:49:03,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:03,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:03,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:03,303 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 13:49:03,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750638336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:03,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:03,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 23 [2021-06-05 13:49:03,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316979429] [2021-06-05 13:49:03,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:49:03,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:03,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:49:03,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:49:03,303 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 13:49:03,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:03,720 INFO L93 Difference]: Finished difference Result 26019 states and 82469 transitions. [2021-06-05 13:49:03,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:49:03,721 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 13:49:03,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:03,758 INFO L225 Difference]: With dead ends: 26019 [2021-06-05 13:49:03,758 INFO L226 Difference]: Without dead ends: 26002 [2021-06-05 13:49:03,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 338.8ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:49:03,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26002 states. [2021-06-05 13:49:04,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26002 to 25397. [2021-06-05 13:49:04,163 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 13:49:04,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25397 states to 25397 states and 81100 transitions. [2021-06-05 13:49:04,223 INFO L78 Accepts]: Start accepts. Automaton has 25397 states and 81100 transitions. Word has length 25 [2021-06-05 13:49:04,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:04,223 INFO L482 AbstractCegarLoop]: Abstraction has 25397 states and 81100 transitions. [2021-06-05 13:49:04,223 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 13:49:04,223 INFO L276 IsEmpty]: Start isEmpty. Operand 25397 states and 81100 transitions. [2021-06-05 13:49:04,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:04,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:04,255 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:04,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable772 [2021-06-05 13:49:04,455 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:04,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:04,455 INFO L82 PathProgramCache]: Analyzing trace with hash 719449663, now seen corresponding path program 448 times [2021-06-05 13:49:04,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:04,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275055721] [2021-06-05 13:49:04,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:04,608 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 13:49:04,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:04,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275055721] [2021-06-05 13:49:04,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275055721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:04,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115049222] [2021-06-05 13:49:04,608 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 13:49:04,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:49:04,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:04,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:04,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:04,805 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 13:49:04,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115049222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:04,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:04,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 23 [2021-06-05 13:49:04,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450932806] [2021-06-05 13:49:04,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:49:04,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:04,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:49:04,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:49:04,805 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 13:49:05,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:05,205 INFO L93 Difference]: Finished difference Result 26023 states and 82394 transitions. [2021-06-05 13:49:05,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:49:05,205 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 13:49:05,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:05,252 INFO L225 Difference]: With dead ends: 26023 [2021-06-05 13:49:05,252 INFO L226 Difference]: Without dead ends: 26005 [2021-06-05 13:49:05,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 340.6ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:49:05,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26005 states. [2021-06-05 13:49:05,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26005 to 25282. [2021-06-05 13:49:05,746 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 13:49:05,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25282 states to 25282 states and 80637 transitions. [2021-06-05 13:49:05,801 INFO L78 Accepts]: Start accepts. Automaton has 25282 states and 80637 transitions. Word has length 25 [2021-06-05 13:49:05,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:05,801 INFO L482 AbstractCegarLoop]: Abstraction has 25282 states and 80637 transitions. [2021-06-05 13:49:05,801 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 13:49:05,801 INFO L276 IsEmpty]: Start isEmpty. Operand 25282 states and 80637 transitions. [2021-06-05 13:49:05,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:05,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:05,830 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:06,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable775 [2021-06-05 13:49:06,030 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:06,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:06,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1359844165, now seen corresponding path program 449 times [2021-06-05 13:49:06,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:06,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487976617] [2021-06-05 13:49:06,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:06,174 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 13:49:06,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:06,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487976617] [2021-06-05 13:49:06,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487976617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:06,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118861755] [2021-06-05 13:49:06,175 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 13:49:06,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:49:06,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:06,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:06,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:06,386 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 13:49:06,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118861755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:06,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:06,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-06-05 13:49:06,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50567994] [2021-06-05 13:49:06,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:49:06,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:06,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:49:06,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:06,387 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 13:49:06,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:06,836 INFO L93 Difference]: Finished difference Result 25873 states and 81826 transitions. [2021-06-05 13:49:06,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:49:06,837 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 13:49:06,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:06,882 INFO L225 Difference]: With dead ends: 25873 [2021-06-05 13:49:06,882 INFO L226 Difference]: Without dead ends: 25851 [2021-06-05 13:49:06,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 355.1ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:49:06,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25851 states. [2021-06-05 13:49:07,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25851 to 25224. [2021-06-05 13:49:07,304 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 13:49:07,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25224 states to 25224 states and 80400 transitions. [2021-06-05 13:49:07,355 INFO L78 Accepts]: Start accepts. Automaton has 25224 states and 80400 transitions. Word has length 25 [2021-06-05 13:49:07,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:07,355 INFO L482 AbstractCegarLoop]: Abstraction has 25224 states and 80400 transitions. [2021-06-05 13:49:07,355 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 13:49:07,355 INFO L276 IsEmpty]: Start isEmpty. Operand 25224 states and 80400 transitions. [2021-06-05 13:49:07,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:07,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:07,384 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:07,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 453 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable778 [2021-06-05 13:49:07,597 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:07,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:07,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1393443393, now seen corresponding path program 450 times [2021-06-05 13:49:07,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:07,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815082926] [2021-06-05 13:49:07,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:07,739 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 13:49:07,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:07,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815082926] [2021-06-05 13:49:07,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815082926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:07,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845396777] [2021-06-05 13:49:07,739 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 13:49:07,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:49:07,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:07,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:07,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:07,948 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 13:49:07,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845396777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:07,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:07,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-06-05 13:49:07,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475677512] [2021-06-05 13:49:07,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:49:07,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:07,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:49:07,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:07,948 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 13:49:08,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:08,422 INFO L93 Difference]: Finished difference Result 25707 states and 81351 transitions. [2021-06-05 13:49:08,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:49:08,422 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 13:49:08,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:08,464 INFO L225 Difference]: With dead ends: 25707 [2021-06-05 13:49:08,464 INFO L226 Difference]: Without dead ends: 25681 [2021-06-05 13:49:08,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 364.3ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:49:08,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25681 states. [2021-06-05 13:49:08,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25681 to 25191. [2021-06-05 13:49:08,857 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 13:49:08,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25191 states to 25191 states and 80289 transitions. [2021-06-05 13:49:08,918 INFO L78 Accepts]: Start accepts. Automaton has 25191 states and 80289 transitions. Word has length 25 [2021-06-05 13:49:08,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:08,918 INFO L482 AbstractCegarLoop]: Abstraction has 25191 states and 80289 transitions. [2021-06-05 13:49:08,918 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 13:49:08,918 INFO L276 IsEmpty]: Start isEmpty. Operand 25191 states and 80289 transitions. [2021-06-05 13:49:08,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:08,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:08,950 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:09,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,454 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:09,151 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:09,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:09,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1859947835, now seen corresponding path program 451 times [2021-06-05 13:49:09,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:09,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042235904] [2021-06-05 13:49:09,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:09,297 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 13:49:09,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:09,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042235904] [2021-06-05 13:49:09,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042235904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:09,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066643044] [2021-06-05 13:49:09,298 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 13:49:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:09,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:09,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:09,473 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 13:49:09,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066643044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:09,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:09,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-06-05 13:49:09,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073379877] [2021-06-05 13:49:09,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:49:09,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:09,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:49:09,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:09,474 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 13:49:09,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:09,998 INFO L93 Difference]: Finished difference Result 25528 states and 80917 transitions. [2021-06-05 13:49:09,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:49:09,998 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 13:49:09,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:10,037 INFO L225 Difference]: With dead ends: 25528 [2021-06-05 13:49:10,037 INFO L226 Difference]: Without dead ends: 25521 [2021-06-05 13:49:10,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 329.3ms TimeCoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:49:10,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25521 states. [2021-06-05 13:49:10,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25521 to 25191. [2021-06-05 13:49:10,490 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 13:49:10,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25191 states to 25191 states and 80289 transitions. [2021-06-05 13:49:10,561 INFO L78 Accepts]: Start accepts. Automaton has 25191 states and 80289 transitions. Word has length 25 [2021-06-05 13:49:10,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:10,561 INFO L482 AbstractCegarLoop]: Abstraction has 25191 states and 80289 transitions. [2021-06-05 13:49:10,561 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 13:49:10,561 INFO L276 IsEmpty]: Start isEmpty. Operand 25191 states and 80289 transitions. [2021-06-05 13:49:10,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:10,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:10,598 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:10,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable784 [2021-06-05 13:49:10,798 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:10,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:10,798 INFO L82 PathProgramCache]: Analyzing trace with hash 519987609, now seen corresponding path program 452 times [2021-06-05 13:49:10,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:10,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543700258] [2021-06-05 13:49:10,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:10,948 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 13:49:10,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:10,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543700258] [2021-06-05 13:49:10,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543700258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:10,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241352244] [2021-06-05 13:49:10,948 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 13:49:10,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:49:10,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:10,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:10,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:11,185 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 13:49:11,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241352244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:11,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:11,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-06-05 13:49:11,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75154616] [2021-06-05 13:49:11,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:49:11,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:11,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:49:11,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:11,185 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 13:49:11,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:11,521 INFO L93 Difference]: Finished difference Result 25433 states and 80707 transitions. [2021-06-05 13:49:11,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:49:11,521 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 13:49:11,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:11,568 INFO L225 Difference]: With dead ends: 25433 [2021-06-05 13:49:11,568 INFO L226 Difference]: Without dead ends: 25420 [2021-06-05 13:49:11,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 342.2ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:49:11,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25420 states. [2021-06-05 13:49:11,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25420 to 25149. [2021-06-05 13:49:11,924 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 13:49:11,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25149 states to 25149 states and 80117 transitions. [2021-06-05 13:49:11,980 INFO L78 Accepts]: Start accepts. Automaton has 25149 states and 80117 transitions. Word has length 25 [2021-06-05 13:49:11,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:11,980 INFO L482 AbstractCegarLoop]: Abstraction has 25149 states and 80117 transitions. [2021-06-05 13:49:11,980 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 13:49:11,980 INFO L276 IsEmpty]: Start isEmpty. Operand 25149 states and 80117 transitions. [2021-06-05 13:49:12,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:12,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:12,010 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:12,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable787,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:12,211 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:12,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:12,211 INFO L82 PathProgramCache]: Analyzing trace with hash -799705089, now seen corresponding path program 453 times [2021-06-05 13:49:12,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:12,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910501977] [2021-06-05 13:49:12,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:12,363 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 13:49:12,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:12,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910501977] [2021-06-05 13:49:12,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910501977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:12,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549506650] [2021-06-05 13:49:12,364 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 13:49:12,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:49:12,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:12,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:12,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:12,561 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 13:49:12,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549506650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:12,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:12,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-06-05 13:49:12,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364398125] [2021-06-05 13:49:12,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:49:12,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:12,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:49:12,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:49:12,562 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 13:49:12,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:12,956 INFO L93 Difference]: Finished difference Result 26300 states and 83236 transitions. [2021-06-05 13:49:12,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:49:12,956 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 13:49:12,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:13,000 INFO L225 Difference]: With dead ends: 26300 [2021-06-05 13:49:13,000 INFO L226 Difference]: Without dead ends: 26283 [2021-06-05 13:49:13,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 337.6ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:49:13,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26283 states. [2021-06-05 13:49:13,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26283 to 25645. [2021-06-05 13:49:13,406 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 13:49:13,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25645 states to 25645 states and 81803 transitions. [2021-06-05 13:49:13,466 INFO L78 Accepts]: Start accepts. Automaton has 25645 states and 81803 transitions. Word has length 25 [2021-06-05 13:49:13,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:13,467 INFO L482 AbstractCegarLoop]: Abstraction has 25645 states and 81803 transitions. [2021-06-05 13:49:13,467 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 13:49:13,467 INFO L276 IsEmpty]: Start isEmpty. Operand 25645 states and 81803 transitions. [2021-06-05 13:49:13,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:13,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:13,503 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:13,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable790,457 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:13,703 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:13,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:13,704 INFO L82 PathProgramCache]: Analyzing trace with hash 814997635, now seen corresponding path program 454 times [2021-06-05 13:49:13,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:13,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106746069] [2021-06-05 13:49:13,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:13,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:13,851 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 13:49:13,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:13,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106746069] [2021-06-05 13:49:13,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106746069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:13,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685787190] [2021-06-05 13:49:13,851 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 13:49:13,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:49:13,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:13,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:13,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:14,044 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 13:49:14,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685787190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:14,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:14,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-06-05 13:49:14,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041981576] [2021-06-05 13:49:14,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:49:14,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:14,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:49:14,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:49:14,044 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 13:49:14,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:14,487 INFO L93 Difference]: Finished difference Result 26302 states and 83129 transitions. [2021-06-05 13:49:14,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:49:14,487 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 13:49:14,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:14,532 INFO L225 Difference]: With dead ends: 26302 [2021-06-05 13:49:14,532 INFO L226 Difference]: Without dead ends: 26284 [2021-06-05 13:49:14,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 392.9ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:49:14,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26284 states. [2021-06-05 13:49:14,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26284 to 25519. [2021-06-05 13:49:14,912 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 13:49:14,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25519 states to 25519 states and 81325 transitions. [2021-06-05 13:49:14,963 INFO L78 Accepts]: Start accepts. Automaton has 25519 states and 81325 transitions. Word has length 25 [2021-06-05 13:49:14,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:14,964 INFO L482 AbstractCegarLoop]: Abstraction has 25519 states and 81325 transitions. [2021-06-05 13:49:14,964 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 13:49:14,964 INFO L276 IsEmpty]: Start isEmpty. Operand 25519 states and 81325 transitions. [2021-06-05 13:49:14,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:14,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:14,996 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:15,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable793 [2021-06-05 13:49:15,197 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:15,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:15,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1264296193, now seen corresponding path program 455 times [2021-06-05 13:49:15,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:15,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797854768] [2021-06-05 13:49:15,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:15,333 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 13:49:15,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:15,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797854768] [2021-06-05 13:49:15,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797854768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:15,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872478134] [2021-06-05 13:49:15,334 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 13:49:15,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:49:15,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:15,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:15,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:15,532 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 13:49:15,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872478134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:15,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:15,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-05 13:49:15,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27072612] [2021-06-05 13:49:15,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:49:15,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:15,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:49:15,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:15,533 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 13:49:15,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:15,964 INFO L93 Difference]: Finished difference Result 26169 states and 82620 transitions. [2021-06-05 13:49:15,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:49:15,964 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 13:49:15,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:16,005 INFO L225 Difference]: With dead ends: 26169 [2021-06-05 13:49:16,006 INFO L226 Difference]: Without dead ends: 26147 [2021-06-05 13:49:16,006 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 13:49:16,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26147 states. [2021-06-05 13:49:16,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26147 to 25469. [2021-06-05 13:49:16,407 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 13:49:16,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25469 states to 25469 states and 81125 transitions. [2021-06-05 13:49:16,461 INFO L78 Accepts]: Start accepts. Automaton has 25469 states and 81125 transitions. Word has length 25 [2021-06-05 13:49:16,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:16,461 INFO L482 AbstractCegarLoop]: Abstraction has 25469 states and 81125 transitions. [2021-06-05 13:49:16,461 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 13:49:16,461 INFO L276 IsEmpty]: Start isEmpty. Operand 25469 states and 81125 transitions. [2021-06-05 13:49:16,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:16,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:16,489 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:16,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable796,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:16,691 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:16,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:16,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1297895421, now seen corresponding path program 456 times [2021-06-05 13:49:16,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:16,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223091950] [2021-06-05 13:49:16,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:16,836 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 13:49:16,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:16,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223091950] [2021-06-05 13:49:16,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223091950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:16,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370162627] [2021-06-05 13:49:16,836 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 13:49:16,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:49:16,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:16,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:16,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:17,037 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 13:49:17,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370162627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:17,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:17,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-05 13:49:17,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255682794] [2021-06-05 13:49:17,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:49:17,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:17,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:49:17,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:17,037 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 13:49:17,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:17,590 INFO L93 Difference]: Finished difference Result 26109 states and 82367 transitions. [2021-06-05 13:49:17,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:49:17,590 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 13:49:17,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:17,631 INFO L225 Difference]: With dead ends: 26109 [2021-06-05 13:49:17,631 INFO L226 Difference]: Without dead ends: 26083 [2021-06-05 13:49:17,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 369.9ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:49:17,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26083 states. [2021-06-05 13:49:18,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26083 to 25423. [2021-06-05 13:49:18,032 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 13:49:18,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25423 states to 25423 states and 80958 transitions. [2021-06-05 13:49:18,091 INFO L78 Accepts]: Start accepts. Automaton has 25423 states and 80958 transitions. Word has length 25 [2021-06-05 13:49:18,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:18,091 INFO L482 AbstractCegarLoop]: Abstraction has 25423 states and 80958 transitions. [2021-06-05 13:49:18,091 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 13:49:18,091 INFO L276 IsEmpty]: Start isEmpty. Operand 25423 states and 80958 transitions. [2021-06-05 13:49:18,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:18,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:18,120 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:18,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable799,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:18,321 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:18,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:18,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1955495807, now seen corresponding path program 457 times [2021-06-05 13:49:18,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:18,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783587420] [2021-06-05 13:49:18,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:18,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:18,474 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 13:49:18,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:18,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783587420] [2021-06-05 13:49:18,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783587420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:18,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182351972] [2021-06-05 13:49:18,474 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 13:49:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:18,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:18,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:18,784 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-05 13:49:18,804 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 13:49:18,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182351972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:18,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:18,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-05 13:49:18,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724355800] [2021-06-05 13:49:18,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:49:18,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:18,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:49:18,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:18,805 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 13:49:19,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:19,355 INFO L93 Difference]: Finished difference Result 25930 states and 81933 transitions. [2021-06-05 13:49:19,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:49:19,355 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 13:49:19,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:19,406 INFO L225 Difference]: With dead ends: 25930 [2021-06-05 13:49:19,406 INFO L226 Difference]: Without dead ends: 25900 [2021-06-05 13:49:19,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 383.2ms TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:49:19,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25900 states. [2021-06-05 13:49:19,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25900 to 25388. [2021-06-05 13:49:19,816 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 13:49:19,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25388 states to 25388 states and 80843 transitions. [2021-06-05 13:49:19,878 INFO L78 Accepts]: Start accepts. Automaton has 25388 states and 80843 transitions. Word has length 25 [2021-06-05 13:49:19,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:19,878 INFO L482 AbstractCegarLoop]: Abstraction has 25388 states and 80843 transitions. [2021-06-05 13:49:19,878 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 13:49:19,878 INFO L276 IsEmpty]: Start isEmpty. Operand 25388 states and 80843 transitions. [2021-06-05 13:49:19,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:19,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:19,910 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:20,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable802 [2021-06-05 13:49:20,111 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:20,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:20,111 INFO L82 PathProgramCache]: Analyzing trace with hash -268591229, now seen corresponding path program 458 times [2021-06-05 13:49:20,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:20,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487224138] [2021-06-05 13:49:20,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:20,260 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 13:49:20,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:20,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487224138] [2021-06-05 13:49:20,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487224138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:20,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240943127] [2021-06-05 13:49:20,260 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 13:49:20,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:49:20,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:20,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:20,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:20,472 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 13:49:20,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240943127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:20,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:20,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-05 13:49:20,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891235107] [2021-06-05 13:49:20,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:49:20,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:20,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:49:20,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:20,473 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 13:49:20,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:20,969 INFO L93 Difference]: Finished difference Result 25727 states and 81464 transitions. [2021-06-05 13:49:20,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:49:20,969 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 13:49:20,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:21,010 INFO L225 Difference]: With dead ends: 25727 [2021-06-05 13:49:21,011 INFO L226 Difference]: Without dead ends: 25720 [2021-06-05 13:49:21,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 349.5ms TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:49:21,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25720 states. [2021-06-05 13:49:21,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25720 to 25388. [2021-06-05 13:49:21,367 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 13:49:21,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25388 states to 25388 states and 80843 transitions. [2021-06-05 13:49:21,427 INFO L78 Accepts]: Start accepts. Automaton has 25388 states and 80843 transitions. Word has length 25 [2021-06-05 13:49:21,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:21,427 INFO L482 AbstractCegarLoop]: Abstraction has 25388 states and 80843 transitions. [2021-06-05 13:49:21,427 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 13:49:21,427 INFO L276 IsEmpty]: Start isEmpty. Operand 25388 states and 80843 transitions. [2021-06-05 13:49:21,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:21,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:21,457 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:21,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable805,462 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:21,665 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:21,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:21,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1989488811, now seen corresponding path program 459 times [2021-06-05 13:49:21,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:21,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479327302] [2021-06-05 13:49:21,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:21,805 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 13:49:21,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:21,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479327302] [2021-06-05 13:49:21,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479327302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:21,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169991347] [2021-06-05 13:49:21,805 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 13:49:21,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:49:21,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:21,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:21,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:22,022 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 13:49:22,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169991347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:22,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:22,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-06-05 13:49:22,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764975291] [2021-06-05 13:49:22,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:49:22,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:22,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:49:22,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:22,023 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 13:49:22,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:22,320 INFO L93 Difference]: Finished difference Result 25601 states and 81204 transitions. [2021-06-05 13:49:22,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:49:22,320 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 13:49:22,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:22,366 INFO L225 Difference]: With dead ends: 25601 [2021-06-05 13:49:22,366 INFO L226 Difference]: Without dead ends: 25588 [2021-06-05 13:49:22,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 323.7ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:49:22,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25588 states. [2021-06-05 13:49:22,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25588 to 25330. [2021-06-05 13:49:22,748 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 13:49:22,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25330 states to 25330 states and 80599 transitions. [2021-06-05 13:49:22,808 INFO L78 Accepts]: Start accepts. Automaton has 25330 states and 80599 transitions. Word has length 25 [2021-06-05 13:49:22,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:22,808 INFO L482 AbstractCegarLoop]: Abstraction has 25330 states and 80599 transitions. [2021-06-05 13:49:22,808 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 13:49:22,808 INFO L276 IsEmpty]: Start isEmpty. Operand 25330 states and 80599 transitions. [2021-06-05 13:49:22,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:22,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:22,839 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:23,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable808,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:23,040 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:23,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:23,040 INFO L82 PathProgramCache]: Analyzing trace with hash -2132685253, now seen corresponding path program 460 times [2021-06-05 13:49:23,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:23,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99053784] [2021-06-05 13:49:23,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:23,303 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 13:49:23,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:23,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99053784] [2021-06-05 13:49:23,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99053784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:23,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438805700] [2021-06-05 13:49:23,304 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 13:49:23,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:49:23,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:23,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:23,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:23,488 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 13:49:23,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438805700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:23,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:23,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-06-05 13:49:23,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663330850] [2021-06-05 13:49:23,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:49:23,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:23,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:49:23,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:49:23,489 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 13:49:23,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:23,956 INFO L93 Difference]: Finished difference Result 26240 states and 82962 transitions. [2021-06-05 13:49:23,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:49:23,957 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 13:49:23,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:24,001 INFO L225 Difference]: With dead ends: 26240 [2021-06-05 13:49:24,001 INFO L226 Difference]: Without dead ends: 26223 [2021-06-05 13:49:24,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 435.9ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:49:24,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26223 states. [2021-06-05 13:49:24,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26223 to 25777. [2021-06-05 13:49:24,377 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 13:49:24,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25777 states to 25777 states and 82071 transitions. [2021-06-05 13:49:24,435 INFO L78 Accepts]: Start accepts. Automaton has 25777 states and 82071 transitions. Word has length 25 [2021-06-05 13:49:24,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:24,436 INFO L482 AbstractCegarLoop]: Abstraction has 25777 states and 82071 transitions. [2021-06-05 13:49:24,436 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 13:49:24,436 INFO L276 IsEmpty]: Start isEmpty. Operand 25777 states and 82071 transitions. [2021-06-05 13:49:24,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:24,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:24,474 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:24,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable811 [2021-06-05 13:49:24,689 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:24,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:24,689 INFO L82 PathProgramCache]: Analyzing trace with hash -517982529, now seen corresponding path program 461 times [2021-06-05 13:49:24,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:24,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988938261] [2021-06-05 13:49:24,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:24,839 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 13:49:24,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:24,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988938261] [2021-06-05 13:49:24,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988938261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:24,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621328056] [2021-06-05 13:49:24,839 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 13:49:24,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:49:24,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:24,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:24,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:25,026 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 13:49:25,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621328056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:25,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:25,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-06-05 13:49:25,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129777578] [2021-06-05 13:49:25,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:49:25,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:25,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:49:25,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:49:25,027 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 13:49:25,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:25,463 INFO L93 Difference]: Finished difference Result 26238 states and 82828 transitions. [2021-06-05 13:49:25,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:49:25,463 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 13:49:25,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:25,512 INFO L225 Difference]: With dead ends: 26238 [2021-06-05 13:49:25,512 INFO L226 Difference]: Without dead ends: 26220 [2021-06-05 13:49:25,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 323.9ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:49:25,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26220 states. [2021-06-05 13:49:25,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26220 to 25645. [2021-06-05 13:49:25,900 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 13:49:25,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25645 states to 25645 states and 81597 transitions. [2021-06-05 13:49:25,963 INFO L78 Accepts]: Start accepts. Automaton has 25645 states and 81597 transitions. Word has length 25 [2021-06-05 13:49:25,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:25,963 INFO L482 AbstractCegarLoop]: Abstraction has 25645 states and 81597 transitions. [2021-06-05 13:49:25,963 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 13:49:25,963 INFO L276 IsEmpty]: Start isEmpty. Operand 25645 states and 81597 transitions. [2021-06-05 13:49:26,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:26,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:26,000 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:26,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable814,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:26,200 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:26,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:26,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1697690939, now seen corresponding path program 462 times [2021-06-05 13:49:26,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:26,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621464152] [2021-06-05 13:49:26,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:26,351 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 13:49:26,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:26,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621464152] [2021-06-05 13:49:26,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621464152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:26,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404155634] [2021-06-05 13:49:26,352 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 13:49:26,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:49:26,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:26,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:26,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:26,545 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 13:49:26,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404155634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:26,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:26,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-05 13:49:26,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948107027] [2021-06-05 13:49:26,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:49:26,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:26,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:49:26,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:26,546 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 13:49:26,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:26,993 INFO L93 Difference]: Finished difference Result 26128 states and 82385 transitions. [2021-06-05 13:49:26,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:49:26,993 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 13:49:26,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:27,037 INFO L225 Difference]: With dead ends: 26128 [2021-06-05 13:49:27,037 INFO L226 Difference]: Without dead ends: 26106 [2021-06-05 13:49:27,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 334.4ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:49:27,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26106 states. [2021-06-05 13:49:27,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26106 to 25607. [2021-06-05 13:49:27,568 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 13:49:27,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25607 states to 25607 states and 81439 transitions. [2021-06-05 13:49:27,633 INFO L78 Accepts]: Start accepts. Automaton has 25607 states and 81439 transitions. Word has length 25 [2021-06-05 13:49:27,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:27,633 INFO L482 AbstractCegarLoop]: Abstraction has 25607 states and 81439 transitions. [2021-06-05 13:49:27,633 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 13:49:27,633 INFO L276 IsEmpty]: Start isEmpty. Operand 25607 states and 81439 transitions. [2021-06-05 13:49:27,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:27,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:27,671 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:27,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable817,466 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:27,872 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:27,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:27,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1664091711, now seen corresponding path program 463 times [2021-06-05 13:49:27,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:27,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175393205] [2021-06-05 13:49:27,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:28,014 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 13:49:28,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:28,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175393205] [2021-06-05 13:49:28,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175393205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:28,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294854902] [2021-06-05 13:49:28,014 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 13:49:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:28,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:28,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:28,200 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 13:49:28,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294854902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:28,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:28,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-05 13:49:28,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450643121] [2021-06-05 13:49:28,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:49:28,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:28,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:49:28,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:28,201 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 13:49:28,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:28,720 INFO L93 Difference]: Finished difference Result 26123 states and 82279 transitions. [2021-06-05 13:49:28,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:49:28,720 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 13:49:28,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:28,758 INFO L225 Difference]: With dead ends: 26123 [2021-06-05 13:49:28,758 INFO L226 Difference]: Without dead ends: 26097 [2021-06-05 13:49:28,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 342.6ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:49:28,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26097 states. [2021-06-05 13:49:29,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26097 to 25568. [2021-06-05 13:49:29,136 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 13:49:29,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25568 states to 25568 states and 81294 transitions. [2021-06-05 13:49:29,200 INFO L78 Accepts]: Start accepts. Automaton has 25568 states and 81294 transitions. Word has length 25 [2021-06-05 13:49:29,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:29,201 INFO L482 AbstractCegarLoop]: Abstraction has 25568 states and 81294 transitions. [2021-06-05 13:49:29,201 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 13:49:29,201 INFO L276 IsEmpty]: Start isEmpty. Operand 25568 states and 81294 transitions. [2021-06-05 13:49:29,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:29,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:29,238 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:29,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable820,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:29,438 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:29,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:29,439 INFO L82 PathProgramCache]: Analyzing trace with hash 622515643, now seen corresponding path program 464 times [2021-06-05 13:49:29,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:29,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133244203] [2021-06-05 13:49:29,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:29,585 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 13:49:29,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:29,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133244203] [2021-06-05 13:49:29,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133244203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:29,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107915716] [2021-06-05 13:49:29,586 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 13:49:29,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:49:29,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:29,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:29,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:29,761 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 13:49:29,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107915716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:29,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:29,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-05 13:49:29,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731263782] [2021-06-05 13:49:29,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:49:29,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:29,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:49:29,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:29,762 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 13:49:30,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:30,376 INFO L93 Difference]: Finished difference Result 26123 states and 82191 transitions. [2021-06-05 13:49:30,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:49:30,376 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 13:49:30,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:30,413 INFO L225 Difference]: With dead ends: 26123 [2021-06-05 13:49:30,413 INFO L226 Difference]: Without dead ends: 26093 [2021-06-05 13:49:30,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 360.6ms TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:49:30,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26093 states. [2021-06-05 13:49:30,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26093 to 25530. [2021-06-05 13:49:30,788 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 13:49:30,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25530 states to 25530 states and 81164 transitions. [2021-06-05 13:49:30,848 INFO L78 Accepts]: Start accepts. Automaton has 25530 states and 81164 transitions. Word has length 25 [2021-06-05 13:49:30,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:30,848 INFO L482 AbstractCegarLoop]: Abstraction has 25530 states and 81164 transitions. [2021-06-05 13:49:30,848 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 13:49:30,849 INFO L276 IsEmpty]: Start isEmpty. Operand 25530 states and 81164 transitions. [2021-06-05 13:49:30,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:30,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:30,879 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:31,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable823,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:31,079 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:31,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:31,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1601571393, now seen corresponding path program 465 times [2021-06-05 13:49:31,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:31,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67037643] [2021-06-05 13:49:31,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:31,227 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 13:49:31,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:31,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67037643] [2021-06-05 13:49:31,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67037643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:31,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976277925] [2021-06-05 13:49:31,227 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 13:49:31,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:49:31,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:31,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:31,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:31,403 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 13:49:31,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976277925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:31,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:31,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-05 13:49:31,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716585105] [2021-06-05 13:49:31,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:49:31,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:31,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:49:31,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:31,404 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 13:49:31,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:31,955 INFO L93 Difference]: Finished difference Result 25971 states and 81876 transitions. [2021-06-05 13:49:31,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:49:31,956 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 13:49:31,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:31,991 INFO L225 Difference]: With dead ends: 25971 [2021-06-05 13:49:31,992 INFO L226 Difference]: Without dead ends: 25937 [2021-06-05 13:49:31,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 373.5ms TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:49:32,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25937 states. [2021-06-05 13:49:32,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25937 to 25500. [2021-06-05 13:49:32,424 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 13:49:32,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25500 states to 25500 states and 81071 transitions. [2021-06-05 13:49:32,483 INFO L78 Accepts]: Start accepts. Automaton has 25500 states and 81071 transitions. Word has length 25 [2021-06-05 13:49:32,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:32,483 INFO L482 AbstractCegarLoop]: Abstraction has 25500 states and 81071 transitions. [2021-06-05 13:49:32,484 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 13:49:32,484 INFO L276 IsEmpty]: Start isEmpty. Operand 25500 states and 81071 transitions. [2021-06-05 13:49:32,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:32,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:32,514 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:32,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable826,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:32,714 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:32,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:32,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1828792773, now seen corresponding path program 466 times [2021-06-05 13:49:32,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:32,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266203396] [2021-06-05 13:49:32,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:32,871 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 13:49:32,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:32,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266203396] [2021-06-05 13:49:32,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266203396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:32,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734844646] [2021-06-05 13:49:32,871 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 13:49:32,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:49:32,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:32,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:32,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:33,039 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 13:49:33,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734844646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:33,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:33,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-05 13:49:33,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61696653] [2021-06-05 13:49:33,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:49:33,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:33,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:49:33,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:33,040 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 13:49:33,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:33,611 INFO L93 Difference]: Finished difference Result 25807 states and 81556 transitions. [2021-06-05 13:49:33,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:49:33,611 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 13:49:33,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:33,648 INFO L225 Difference]: With dead ends: 25807 [2021-06-05 13:49:33,648 INFO L226 Difference]: Without dead ends: 25800 [2021-06-05 13:49:33,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 356.5ms TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:49:33,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25800 states. [2021-06-05 13:49:34,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25800 to 25502. [2021-06-05 13:49:34,039 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 13:49:34,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25502 states to 25502 states and 81074 transitions. [2021-06-05 13:49:34,099 INFO L78 Accepts]: Start accepts. Automaton has 25502 states and 81074 transitions. Word has length 25 [2021-06-05 13:49:34,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:34,099 INFO L482 AbstractCegarLoop]: Abstraction has 25502 states and 81074 transitions. [2021-06-05 13:49:34,099 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 13:49:34,099 INFO L276 IsEmpty]: Start isEmpty. Operand 25502 states and 81074 transitions. [2021-06-05 13:49:34,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:34,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:34,130 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:34,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable829,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:34,330 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:34,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:34,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1821120793, now seen corresponding path program 467 times [2021-06-05 13:49:34,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:34,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372664671] [2021-06-05 13:49:34,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:34,472 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 13:49:34,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:34,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372664671] [2021-06-05 13:49:34,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372664671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:34,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112333611] [2021-06-05 13:49:34,472 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 13:49:34,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:49:34,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:34,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:34,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:34,706 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 13:49:34,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112333611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:34,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:34,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-06-05 13:49:34,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533358062] [2021-06-05 13:49:34,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:49:34,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:34,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:49:34,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:34,707 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 13:49:35,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:35,047 INFO L93 Difference]: Finished difference Result 25654 states and 81322 transitions. [2021-06-05 13:49:35,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:49:35,047 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 13:49:35,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:35,091 INFO L225 Difference]: With dead ends: 25654 [2021-06-05 13:49:35,091 INFO L226 Difference]: Without dead ends: 25641 [2021-06-05 13:49:35,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 335.3ms TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:49:35,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25641 states. [2021-06-05 13:49:35,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25641 to 25457. [2021-06-05 13:49:35,508 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 13:49:35,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25457 states to 25457 states and 80938 transitions. [2021-06-05 13:49:35,572 INFO L78 Accepts]: Start accepts. Automaton has 25457 states and 80938 transitions. Word has length 25 [2021-06-05 13:49:35,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:35,572 INFO L482 AbstractCegarLoop]: Abstraction has 25457 states and 80938 transitions. [2021-06-05 13:49:35,572 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 13:49:35,572 INFO L276 IsEmpty]: Start isEmpty. Operand 25457 states and 80938 transitions. [2021-06-05 13:49:35,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:35,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:35,605 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:35,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable832 [2021-06-05 13:49:35,805 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:35,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:35,805 INFO L82 PathProgramCache]: Analyzing trace with hash -505397377, now seen corresponding path program 468 times [2021-06-05 13:49:35,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:35,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450432192] [2021-06-05 13:49:35,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:35,958 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 13:49:35,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:35,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450432192] [2021-06-05 13:49:35,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450432192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:35,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983908190] [2021-06-05 13:49:35,958 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 13:49:35,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:49:35,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:35,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:35,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:36,148 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 13:49:36,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983908190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:36,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:36,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-06-05 13:49:36,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924457269] [2021-06-05 13:49:36,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:49:36,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:36,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:49:36,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:49:36,148 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 13:49:36,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:36,612 INFO L93 Difference]: Finished difference Result 26445 states and 83499 transitions. [2021-06-05 13:49:36,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:49:36,612 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 13:49:36,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:36,664 INFO L225 Difference]: With dead ends: 26445 [2021-06-05 13:49:36,665 INFO L226 Difference]: Without dead ends: 26428 [2021-06-05 13:49:36,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 331.7ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:49:36,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26428 states. [2021-06-05 13:49:37,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26428 to 26047. [2021-06-05 13:49:37,118 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 13:49:37,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26047 states to 26047 states and 82746 transitions. [2021-06-05 13:49:37,180 INFO L78 Accepts]: Start accepts. Automaton has 26047 states and 82746 transitions. Word has length 25 [2021-06-05 13:49:37,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:37,180 INFO L482 AbstractCegarLoop]: Abstraction has 26047 states and 82746 transitions. [2021-06-05 13:49:37,180 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 13:49:37,180 INFO L276 IsEmpty]: Start isEmpty. Operand 26047 states and 82746 transitions. [2021-06-05 13:49:37,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:37,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:37,216 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:37,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable835,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:37,417 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:37,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:37,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1109305347, now seen corresponding path program 469 times [2021-06-05 13:49:37,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:37,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053658869] [2021-06-05 13:49:37,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:37,570 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 13:49:37,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:37,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053658869] [2021-06-05 13:49:37,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053658869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:37,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710426598] [2021-06-05 13:49:37,570 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 13:49:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:37,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:37,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:37,757 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 13:49:37,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710426598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:37,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:37,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-06-05 13:49:37,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32033998] [2021-06-05 13:49:37,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:49:37,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:37,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:49:37,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:49:37,758 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 13:49:38,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:38,192 INFO L93 Difference]: Finished difference Result 26443 states and 83380 transitions. [2021-06-05 13:49:38,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:49:38,192 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 13:49:38,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:38,239 INFO L225 Difference]: With dead ends: 26443 [2021-06-05 13:49:38,239 INFO L226 Difference]: Without dead ends: 26427 [2021-06-05 13:49:38,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 329.2ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:49:38,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26427 states. [2021-06-05 13:49:38,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26427 to 26006. [2021-06-05 13:49:38,651 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 13:49:38,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26006 states to 26006 states and 82531 transitions. [2021-06-05 13:49:38,706 INFO L78 Accepts]: Start accepts. Automaton has 26006 states and 82531 transitions. Word has length 25 [2021-06-05 13:49:38,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:38,707 INFO L482 AbstractCegarLoop]: Abstraction has 26006 states and 82531 transitions. [2021-06-05 13:49:38,707 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 13:49:38,707 INFO L276 IsEmpty]: Start isEmpty. Operand 26006 states and 82531 transitions. [2021-06-05 13:49:38,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:38,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:38,739 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:38,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable838,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:38,940 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:38,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:38,940 INFO L82 PathProgramCache]: Analyzing trace with hash -969988481, now seen corresponding path program 470 times [2021-06-05 13:49:38,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:38,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002815814] [2021-06-05 13:49:38,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:39,083 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 13:49:39,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:39,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002815814] [2021-06-05 13:49:39,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002815814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:39,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349714981] [2021-06-05 13:49:39,084 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 13:49:39,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:49:39,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:39,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:39,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:39,297 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 13:49:39,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349714981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:39,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:39,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 13:49:39,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343566408] [2021-06-05 13:49:39,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:49:39,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:39,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:49:39,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:39,298 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 13:49:39,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:39,777 INFO L93 Difference]: Finished difference Result 26428 states and 83208 transitions. [2021-06-05 13:49:39,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:49:39,778 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 13:49:39,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:39,822 INFO L225 Difference]: With dead ends: 26428 [2021-06-05 13:49:39,822 INFO L226 Difference]: Without dead ends: 26410 [2021-06-05 13:49:39,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 331.6ms TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:49:39,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26410 states. [2021-06-05 13:49:40,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26410 to 25949. [2021-06-05 13:49:40,242 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 13:49:40,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25949 states to 25949 states and 82248 transitions. [2021-06-05 13:49:40,304 INFO L78 Accepts]: Start accepts. Automaton has 25949 states and 82248 transitions. Word has length 25 [2021-06-05 13:49:40,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:40,304 INFO L482 AbstractCegarLoop]: Abstraction has 25949 states and 82248 transitions. [2021-06-05 13:49:40,304 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 13:49:40,304 INFO L276 IsEmpty]: Start isEmpty. Operand 25949 states and 82248 transitions. [2021-06-05 13:49:40,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:40,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:40,340 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:40,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable841 [2021-06-05 13:49:40,540 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:40,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:40,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1003587709, now seen corresponding path program 471 times [2021-06-05 13:49:40,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:40,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838303285] [2021-06-05 13:49:40,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:40,685 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 13:49:40,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:40,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838303285] [2021-06-05 13:49:40,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838303285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:40,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052765401] [2021-06-05 13:49:40,685 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 13:49:40,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:49:40,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:40,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:40,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:40,874 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 13:49:40,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052765401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:40,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:40,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 13:49:40,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265920556] [2021-06-05 13:49:40,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:49:40,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:40,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:49:40,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:40,875 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 13:49:41,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:41,474 INFO L93 Difference]: Finished difference Result 26398 states and 82966 transitions. [2021-06-05 13:49:41,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:49:41,474 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 13:49:41,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:41,512 INFO L225 Difference]: With dead ends: 26398 [2021-06-05 13:49:41,512 INFO L226 Difference]: Without dead ends: 26378 [2021-06-05 13:49:41,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 348.1ms TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:49:41,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26378 states. [2021-06-05 13:49:41,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26378 to 25877. [2021-06-05 13:49:41,882 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 13:49:41,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25877 states to 25877 states and 81934 transitions. [2021-06-05 13:49:41,943 INFO L78 Accepts]: Start accepts. Automaton has 25877 states and 81934 transitions. Word has length 25 [2021-06-05 13:49:41,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:41,943 INFO L482 AbstractCegarLoop]: Abstraction has 25877 states and 81934 transitions. [2021-06-05 13:49:41,943 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 13:49:41,943 INFO L276 IsEmpty]: Start isEmpty. Operand 25877 states and 81934 transitions. [2021-06-05 13:49:41,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:41,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:41,981 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:42,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable844,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:42,182 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:42,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:42,182 INFO L82 PathProgramCache]: Analyzing trace with hash -2045163777, now seen corresponding path program 472 times [2021-06-05 13:49:42,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:42,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480961378] [2021-06-05 13:49:42,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:42,332 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 13:49:42,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:42,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480961378] [2021-06-05 13:49:42,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480961378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:42,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098944543] [2021-06-05 13:49:42,332 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 13:49:42,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:49:42,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:42,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:42,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:42,514 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 13:49:42,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098944543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:42,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:42,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 13:49:42,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405303401] [2021-06-05 13:49:42,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:49:42,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:42,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:49:42,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:42,515 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 13:49:43,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:43,041 INFO L93 Difference]: Finished difference Result 26361 states and 82705 transitions. [2021-06-05 13:49:43,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:49:43,041 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 13:49:43,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:43,087 INFO L225 Difference]: With dead ends: 26361 [2021-06-05 13:49:43,087 INFO L226 Difference]: Without dead ends: 26339 [2021-06-05 13:49:43,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 367.1ms TimeCoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:49:43,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26339 states. [2021-06-05 13:49:43,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26339 to 25791. [2021-06-05 13:49:43,481 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 13:49:43,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25791 states to 25791 states and 81621 transitions. [2021-06-05 13:49:43,543 INFO L78 Accepts]: Start accepts. Automaton has 25791 states and 81621 transitions. Word has length 25 [2021-06-05 13:49:43,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:43,543 INFO L482 AbstractCegarLoop]: Abstraction has 25791 states and 81621 transitions. [2021-06-05 13:49:43,543 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 13:49:43,543 INFO L276 IsEmpty]: Start isEmpty. Operand 25791 states and 81621 transitions. [2021-06-05 13:49:43,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:43,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:43,580 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:43,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable847,476 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:43,781 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:43,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:43,781 INFO L82 PathProgramCache]: Analyzing trace with hash 25716483, now seen corresponding path program 473 times [2021-06-05 13:49:43,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:43,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26297019] [2021-06-05 13:49:43,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:43,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:43,935 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 13:49:43,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:43,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26297019] [2021-06-05 13:49:43,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26297019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:43,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793660578] [2021-06-05 13:49:43,935 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 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 13:49:43,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:49:43,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:43,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:43,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:44,110 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 13:49:44,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793660578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:44,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:44,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 13:49:44,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467700339] [2021-06-05 13:49:44,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:49:44,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:44,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:49:44,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:44,111 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 13:49:44,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:44,699 INFO L93 Difference]: Finished difference Result 26316 states and 82452 transitions. [2021-06-05 13:49:44,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:49:44,699 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 13:49:44,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:44,746 INFO L225 Difference]: With dead ends: 26316 [2021-06-05 13:49:44,747 INFO L226 Difference]: Without dead ends: 26292 [2021-06-05 13:49:44,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 378.2ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:49:44,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26292 states. [2021-06-05 13:49:45,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26292 to 25713. [2021-06-05 13:49:45,165 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 13:49:45,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25713 states to 25713 states and 81360 transitions. [2021-06-05 13:49:45,218 INFO L78 Accepts]: Start accepts. Automaton has 25713 states and 81360 transitions. Word has length 25 [2021-06-05 13:49:45,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:45,218 INFO L482 AbstractCegarLoop]: Abstraction has 25713 states and 81360 transitions. [2021-06-05 13:49:45,218 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 13:49:45,218 INFO L276 IsEmpty]: Start isEmpty. Operand 25713 states and 81360 transitions. [2021-06-05 13:49:45,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:45,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:45,249 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:45,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable850 [2021-06-05 13:49:45,450 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:45,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:45,450 INFO L82 PathProgramCache]: Analyzing trace with hash -201504897, now seen corresponding path program 474 times [2021-06-05 13:49:45,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:45,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098639280] [2021-06-05 13:49:45,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:45,606 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 13:49:45,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:45,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098639280] [2021-06-05 13:49:45,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098639280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:45,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405754095] [2021-06-05 13:49:45,606 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 13:49:45,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:49:45,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:45,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:45,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:45,909 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 13:49:45,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405754095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:45,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:45,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 13:49:45,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084154868] [2021-06-05 13:49:45,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:49:45,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:45,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:49:45,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:45,910 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 13:49:46,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:46,515 INFO L93 Difference]: Finished difference Result 26083 states and 81944 transitions. [2021-06-05 13:49:46,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:49:46,515 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 13:49:46,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:46,558 INFO L225 Difference]: With dead ends: 26083 [2021-06-05 13:49:46,558 INFO L226 Difference]: Without dead ends: 26057 [2021-06-05 13:49:46,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 521.9ms TimeCoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:49:46,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26057 states. [2021-06-05 13:49:46,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26057 to 25637. [2021-06-05 13:49:46,968 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 13:49:47,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25637 states to 25637 states and 81143 transitions. [2021-06-05 13:49:47,034 INFO L78 Accepts]: Start accepts. Automaton has 25637 states and 81143 transitions. Word has length 25 [2021-06-05 13:49:47,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:47,034 INFO L482 AbstractCegarLoop]: Abstraction has 25637 states and 81143 transitions. [2021-06-05 13:49:47,034 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 13:49:47,034 INFO L276 IsEmpty]: Start isEmpty. Operand 25637 states and 81143 transitions. [2021-06-05 13:49:47,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:47,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:47,071 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:47,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable853 [2021-06-05 13:49:47,272 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:47,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:47,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1344566915, now seen corresponding path program 475 times [2021-06-05 13:49:47,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:47,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871314818] [2021-06-05 13:49:47,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:47,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:47,431 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 13:49:47,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:47,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871314818] [2021-06-05 13:49:47,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871314818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:47,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752856348] [2021-06-05 13:49:47,432 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 13:49:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:47,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:47,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:47,607 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 13:49:47,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752856348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:47,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:47,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 13:49:47,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526350118] [2021-06-05 13:49:47,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:49:47,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:47,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:49:47,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:47,608 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 13:49:48,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:48,233 INFO L93 Difference]: Finished difference Result 25903 states and 81553 transitions. [2021-06-05 13:49:48,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:49:48,233 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 13:49:48,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:48,272 INFO L225 Difference]: With dead ends: 25903 [2021-06-05 13:49:48,272 INFO L226 Difference]: Without dead ends: 25896 [2021-06-05 13:49:48,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 380.5ms TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:49:48,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25896 states. [2021-06-05 13:49:48,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25896 to 25651. [2021-06-05 13:49:48,662 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 13:49:48,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25651 states to 25651 states and 81164 transitions. [2021-06-05 13:49:48,726 INFO L78 Accepts]: Start accepts. Automaton has 25651 states and 81164 transitions. Word has length 25 [2021-06-05 13:49:48,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:48,726 INFO L482 AbstractCegarLoop]: Abstraction has 25651 states and 81164 transitions. [2021-06-05 13:49:48,726 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 13:49:48,726 INFO L276 IsEmpty]: Start isEmpty. Operand 25651 states and 81164 transitions. [2021-06-05 13:49:48,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:48,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:48,765 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:48,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable856,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:48,965 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:48,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:48,965 INFO L82 PathProgramCache]: Analyzing trace with hash -880520577, now seen corresponding path program 476 times [2021-06-05 13:49:48,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:48,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369673129] [2021-06-05 13:49:48,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:49,125 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 13:49:49,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:49,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369673129] [2021-06-05 13:49:49,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369673129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:49,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619659515] [2021-06-05 13:49:49,126 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 13:49:49,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:49:49,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:49,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:49,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:49,370 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 13:49:49,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619659515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:49,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:49,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 23 [2021-06-05 13:49:49,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738899901] [2021-06-05 13:49:49,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:49:49,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:49,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:49:49,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:49:49,371 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 13:49:49,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:49,702 INFO L93 Difference]: Finished difference Result 26339 states and 82876 transitions. [2021-06-05 13:49:49,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:49:49,702 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 13:49:49,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:49,745 INFO L225 Difference]: With dead ends: 26339 [2021-06-05 13:49:49,745 INFO L226 Difference]: Without dead ends: 26329 [2021-06-05 13:49:49,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 361.4ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:49:49,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26329 states. [2021-06-05 13:49:50,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26329 to 25789. [2021-06-05 13:49:50,272 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 13:49:50,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25789 states to 25789 states and 81677 transitions. [2021-06-05 13:49:50,335 INFO L78 Accepts]: Start accepts. Automaton has 25789 states and 81677 transitions. Word has length 25 [2021-06-05 13:49:50,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:50,335 INFO L482 AbstractCegarLoop]: Abstraction has 25789 states and 81677 transitions. [2021-06-05 13:49:50,335 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 13:49:50,335 INFO L276 IsEmpty]: Start isEmpty. Operand 25789 states and 81677 transitions. [2021-06-05 13:49:50,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:50,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:50,369 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:50,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable859 [2021-06-05 13:49:50,570 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:50,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:50,570 INFO L82 PathProgramCache]: Analyzing trace with hash 734182147, now seen corresponding path program 477 times [2021-06-05 13:49:50,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:50,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29815973] [2021-06-05 13:49:50,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:50,729 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 13:49:50,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:50,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29815973] [2021-06-05 13:49:50,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29815973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:50,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069016063] [2021-06-05 13:49:50,729 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 13:49:50,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:49:50,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:50,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:50,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:50,980 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 13:49:50,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069016063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:50,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:50,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 23 [2021-06-05 13:49:50,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826634568] [2021-06-05 13:49:50,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:49:50,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:50,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:49:50,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:49:50,980 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 13:49:51,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:51,302 INFO L93 Difference]: Finished difference Result 26321 states and 82830 transitions. [2021-06-05 13:49:51,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:49:51,302 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 13:49:51,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:51,346 INFO L225 Difference]: With dead ends: 26321 [2021-06-05 13:49:51,346 INFO L226 Difference]: Without dead ends: 26314 [2021-06-05 13:49:51,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 357.8ms TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:49:51,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26314 states. [2021-06-05 13:49:51,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26314 to 25787. [2021-06-05 13:49:51,739 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 13:49:51,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25787 states to 25787 states and 81669 transitions. [2021-06-05 13:49:51,800 INFO L78 Accepts]: Start accepts. Automaton has 25787 states and 81669 transitions. Word has length 25 [2021-06-05 13:49:51,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:51,800 INFO L482 AbstractCegarLoop]: Abstraction has 25787 states and 81669 transitions. [2021-06-05 13:49:51,801 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 13:49:51,801 INFO L276 IsEmpty]: Start isEmpty. Operand 25787 states and 81669 transitions. [2021-06-05 13:49:51,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:51,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:51,837 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:52,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 481 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable862 [2021-06-05 13:49:52,038 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:52,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:52,038 INFO L82 PathProgramCache]: Analyzing trace with hash -309065771, now seen corresponding path program 478 times [2021-06-05 13:49:52,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:52,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260826834] [2021-06-05 13:49:52,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:52,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:52,178 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 13:49:52,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:52,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260826834] [2021-06-05 13:49:52,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260826834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:52,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041702177] [2021-06-05 13:49:52,179 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 13:49:52,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:49:52,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:52,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:52,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:52,425 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 13:49:52,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041702177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:52,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:52,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-06-05 13:49:52,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96097306] [2021-06-05 13:49:52,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:49:52,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:52,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:49:52,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:52,426 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 13:49:52,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:52,783 INFO L93 Difference]: Finished difference Result 26101 states and 82243 transitions. [2021-06-05 13:49:52,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:49:52,783 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 13:49:52,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:52,830 INFO L225 Difference]: With dead ends: 26101 [2021-06-05 13:49:52,830 INFO L226 Difference]: Without dead ends: 26094 [2021-06-05 13:49:52,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 355.5ms TimeCoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:49:52,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26094 states. [2021-06-05 13:49:53,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26094 to 25786. [2021-06-05 13:49:53,198 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 13:49:53,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25786 states to 25786 states and 81666 transitions. [2021-06-05 13:49:53,257 INFO L78 Accepts]: Start accepts. Automaton has 25786 states and 81666 transitions. Word has length 25 [2021-06-05 13:49:53,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:53,257 INFO L482 AbstractCegarLoop]: Abstraction has 25786 states and 81666 transitions. [2021-06-05 13:49:53,257 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 13:49:53,257 INFO L276 IsEmpty]: Start isEmpty. Operand 25786 states and 81666 transitions. [2021-06-05 13:49:53,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:53,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:53,291 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:53,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable865 [2021-06-05 13:49:53,492 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:53,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:53,492 INFO L82 PathProgramCache]: Analyzing trace with hash 375562111, now seen corresponding path program 479 times [2021-06-05 13:49:53,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:53,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398309161] [2021-06-05 13:49:53,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:53,643 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 13:49:53,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:53,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398309161] [2021-06-05 13:49:53,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398309161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:53,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708305212] [2021-06-05 13:49:53,644 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 13:49:53,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:49:53,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:53,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:53,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:53,860 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 13:49:53,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708305212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:53,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:53,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2021-06-05 13:49:53,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225828163] [2021-06-05 13:49:53,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:49:53,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:53,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:49:53,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:49:53,861 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 13:49:54,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:54,228 INFO L93 Difference]: Finished difference Result 26623 states and 83970 transitions. [2021-06-05 13:49:54,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:49:54,228 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 13:49:54,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:54,276 INFO L225 Difference]: With dead ends: 26623 [2021-06-05 13:49:54,276 INFO L226 Difference]: Without dead ends: 26613 [2021-06-05 13:49:54,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 336.6ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:49:54,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26613 states. [2021-06-05 13:49:54,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26613 to 26000. [2021-06-05 13:49:54,741 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 13:49:54,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26000 states to 26000 states and 82446 transitions. [2021-06-05 13:49:54,805 INFO L78 Accepts]: Start accepts. Automaton has 26000 states and 82446 transitions. Word has length 25 [2021-06-05 13:49:54,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:54,805 INFO L482 AbstractCegarLoop]: Abstraction has 26000 states and 82446 transitions. [2021-06-05 13:49:54,805 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 13:49:54,805 INFO L276 IsEmpty]: Start isEmpty. Operand 26000 states and 82446 transitions. [2021-06-05 13:49:54,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:54,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:54,843 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:55,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable868,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:55,044 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:55,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:55,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1990264835, now seen corresponding path program 480 times [2021-06-05 13:49:55,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:55,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150443310] [2021-06-05 13:49:55,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:55,197 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 13:49:55,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:55,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150443310] [2021-06-05 13:49:55,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150443310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:55,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220155647] [2021-06-05 13:49:55,198 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 13:49:55,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:49:55,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:55,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:55,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:55,426 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 13:49:55,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220155647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:55,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:55,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2021-06-05 13:49:55,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570414018] [2021-06-05 13:49:55,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:49:55,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:55,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:49:55,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:49:55,427 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 13:49:55,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:55,804 INFO L93 Difference]: Finished difference Result 26604 states and 83911 transitions. [2021-06-05 13:49:55,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:49:55,804 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 13:49:55,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:55,853 INFO L225 Difference]: With dead ends: 26604 [2021-06-05 13:49:55,853 INFO L226 Difference]: Without dead ends: 26597 [2021-06-05 13:49:55,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 348.4ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:49:55,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26597 states. [2021-06-05 13:49:56,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26597 to 25997. [2021-06-05 13:49:56,233 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 13:49:56,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25997 states to 25997 states and 82434 transitions. [2021-06-05 13:49:56,292 INFO L78 Accepts]: Start accepts. Automaton has 25997 states and 82434 transitions. Word has length 25 [2021-06-05 13:49:56,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:56,292 INFO L482 AbstractCegarLoop]: Abstraction has 25997 states and 82434 transitions. [2021-06-05 13:49:56,292 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 13:49:56,292 INFO L276 IsEmpty]: Start isEmpty. Operand 25997 states and 82434 transitions. [2021-06-05 13:49:56,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:56,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:56,328 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:56,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable871 [2021-06-05 13:49:56,529 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:56,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:56,529 INFO L82 PathProgramCache]: Analyzing trace with hash 947016917, now seen corresponding path program 481 times [2021-06-05 13:49:56,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:56,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650366619] [2021-06-05 13:49:56,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:56,671 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 13:49:56,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:56,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650366619] [2021-06-05 13:49:56,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650366619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:56,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236107135] [2021-06-05 13:49:56,671 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 13:49:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:56,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:56,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:56,882 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 13:49:56,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236107135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:56,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:56,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-06-05 13:49:56,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208140536] [2021-06-05 13:49:56,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:49:56,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:56,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:49:56,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:56,883 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 13:49:57,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:57,265 INFO L93 Difference]: Finished difference Result 26449 states and 83488 transitions. [2021-06-05 13:49:57,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:49:57,265 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 13:49:57,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:57,310 INFO L225 Difference]: With dead ends: 26449 [2021-06-05 13:49:57,310 INFO L226 Difference]: Without dead ends: 26436 [2021-06-05 13:49:57,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 334.6ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:49:57,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26436 states. [2021-06-05 13:49:57,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26436 to 26004. [2021-06-05 13:49:57,726 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 13:49:57,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26004 states to 26004 states and 82446 transitions. [2021-06-05 13:49:57,790 INFO L78 Accepts]: Start accepts. Automaton has 26004 states and 82446 transitions. Word has length 25 [2021-06-05 13:49:57,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:57,790 INFO L482 AbstractCegarLoop]: Abstraction has 26004 states and 82446 transitions. [2021-06-05 13:49:57,791 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 13:49:57,791 INFO L276 IsEmpty]: Start isEmpty. Operand 26004 states and 82446 transitions. [2021-06-05 13:49:57,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:57,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:57,831 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:58,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable874,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:58,045 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:58,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:58,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1482246719, now seen corresponding path program 482 times [2021-06-05 13:49:58,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:58,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087367343] [2021-06-05 13:49:58,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:58,215 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 13:49:58,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:58,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087367343] [2021-06-05 13:49:58,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087367343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:58,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996552873] [2021-06-05 13:49:58,215 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 13:49:58,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:49:58,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:58,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:58,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:58,489 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 13:49:58,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996552873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:58,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:58,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-06-05 13:49:58,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284543978] [2021-06-05 13:49:58,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:49:58,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:58,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:49:58,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:49:58,490 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 13:49:58,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:58,899 INFO L93 Difference]: Finished difference Result 26271 states and 82944 transitions. [2021-06-05 13:49:58,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:49:58,899 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 13:49:58,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:58,950 INFO L225 Difference]: With dead ends: 26271 [2021-06-05 13:49:58,951 INFO L226 Difference]: Without dead ends: 26264 [2021-06-05 13:49:58,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 390.9ms TimeCoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:49:58,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26264 states. [2021-06-05 13:49:59,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26264 to 26002. [2021-06-05 13:49:59,484 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 13:49:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26002 states to 26002 states and 82440 transitions. [2021-06-05 13:49:59,549 INFO L78 Accepts]: Start accepts. Automaton has 26002 states and 82440 transitions. Word has length 25 [2021-06-05 13:49:59,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:59,549 INFO L482 AbstractCegarLoop]: Abstraction has 26002 states and 82440 transitions. [2021-06-05 13:49:59,549 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 13:49:59,549 INFO L276 IsEmpty]: Start isEmpty. Operand 26002 states and 82440 transitions. [2021-06-05 13:49:59,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:59,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:59,589 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:59,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable877 [2021-06-05 13:49:59,789 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:59,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:59,790 INFO L82 PathProgramCache]: Analyzing trace with hash 880306103, now seen corresponding path program 483 times [2021-06-05 13:49:59,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:59,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049067898] [2021-06-05 13:49:59,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:59,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:59,943 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 13:49:59,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:59,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049067898] [2021-06-05 13:49:59,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049067898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:59,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070411031] [2021-06-05 13:49:59,943 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 13:49:59,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:49:59,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:59,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:49:59,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:00,164 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 13:50:00,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070411031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:00,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:00,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-06-05 13:50:00,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062553007] [2021-06-05 13:50:00,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:50:00,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:00,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:50:00,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:50:00,165 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 13:50:00,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:00,517 INFO L93 Difference]: Finished difference Result 26167 states and 82719 transitions. [2021-06-05 13:50:00,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:50:00,518 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 13:50:00,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:00,563 INFO L225 Difference]: With dead ends: 26167 [2021-06-05 13:50:00,564 INFO L226 Difference]: Without dead ends: 26151 [2021-06-05 13:50:00,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 357.2ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:50:00,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26151 states. [2021-06-05 13:50:01,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26151 to 25962. [2021-06-05 13:50:01,030 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 13:50:01,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25962 states to 25962 states and 82320 transitions. [2021-06-05 13:50:01,087 INFO L78 Accepts]: Start accepts. Automaton has 25962 states and 82320 transitions. Word has length 25 [2021-06-05 13:50:01,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:01,087 INFO L482 AbstractCegarLoop]: Abstraction has 25962 states and 82320 transitions. [2021-06-05 13:50:01,087 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 13:50:01,087 INFO L276 IsEmpty]: Start isEmpty. Operand 25962 states and 82320 transitions. [2021-06-05 13:50:01,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:01,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:01,119 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:01,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:01,319 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:01,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:01,320 INFO L82 PathProgramCache]: Analyzing trace with hash 659419775, now seen corresponding path program 484 times [2021-06-05 13:50:01,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:01,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294564569] [2021-06-05 13:50:01,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:01,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:01,511 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 13:50:01,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:01,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294564569] [2021-06-05 13:50:01,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294564569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:01,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404482845] [2021-06-05 13:50:01,512 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 13:50:01,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:50:01,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:01,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:50:01,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:01,723 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 13:50:01,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404482845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:01,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:01,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 23 [2021-06-05 13:50:01,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565993887] [2021-06-05 13:50:01,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:50:01,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:01,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:50:01,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:50:01,724 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 13:50:02,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:02,077 INFO L93 Difference]: Finished difference Result 26771 states and 84501 transitions. [2021-06-05 13:50:02,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:50:02,077 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 13:50:02,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:02,127 INFO L225 Difference]: With dead ends: 26771 [2021-06-05 13:50:02,128 INFO L226 Difference]: Without dead ends: 26761 [2021-06-05 13:50:02,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 373.9ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:50:02,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26761 states. [2021-06-05 13:50:02,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26761 to 26195. [2021-06-05 13:50:02,552 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 13:50:02,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26195 states to 26195 states and 83158 transitions. [2021-06-05 13:50:02,619 INFO L78 Accepts]: Start accepts. Automaton has 26195 states and 83158 transitions. Word has length 25 [2021-06-05 13:50:02,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:02,619 INFO L482 AbstractCegarLoop]: Abstraction has 26195 states and 83158 transitions. [2021-06-05 13:50:02,619 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 13:50:02,619 INFO L276 IsEmpty]: Start isEmpty. Operand 26195 states and 83158 transitions. [2021-06-05 13:50:02,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:02,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:02,658 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:02,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable883 [2021-06-05 13:50:02,874 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:02,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:02,874 INFO L82 PathProgramCache]: Analyzing trace with hash -2020844797, now seen corresponding path program 485 times [2021-06-05 13:50:02,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:02,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845455154] [2021-06-05 13:50:02,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:03,041 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 13:50:03,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:03,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845455154] [2021-06-05 13:50:03,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845455154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:03,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516528528] [2021-06-05 13:50:03,041 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 13:50:03,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:50:03,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:03,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:50:03,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:03,405 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-05 13:50:03,411 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 13:50:03,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516528528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:03,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:03,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 23 [2021-06-05 13:50:03,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792375613] [2021-06-05 13:50:03,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:50:03,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:03,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:50:03,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:50:03,412 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 13:50:03,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:03,779 INFO L93 Difference]: Finished difference Result 26752 states and 84431 transitions. [2021-06-05 13:50:03,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:50:03,779 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 13:50:03,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:03,828 INFO L225 Difference]: With dead ends: 26752 [2021-06-05 13:50:03,828 INFO L226 Difference]: Without dead ends: 26745 [2021-06-05 13:50:03,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 502.1ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:50:03,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26745 states. [2021-06-05 13:50:04,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26745 to 26191. [2021-06-05 13:50:04,255 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 13:50:04,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26191 states to 26191 states and 83142 transitions. [2021-06-05 13:50:04,320 INFO L78 Accepts]: Start accepts. Automaton has 26191 states and 83142 transitions. Word has length 25 [2021-06-05 13:50:04,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:04,320 INFO L482 AbstractCegarLoop]: Abstraction has 26191 states and 83142 transitions. [2021-06-05 13:50:04,320 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 13:50:04,320 INFO L276 IsEmpty]: Start isEmpty. Operand 26191 states and 83142 transitions. [2021-06-05 13:50:04,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:04,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:04,358 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:04,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable886,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:04,573 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:04,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:04,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1230874581, now seen corresponding path program 486 times [2021-06-05 13:50:04,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:04,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131368055] [2021-06-05 13:50:04,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:04,727 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 13:50:04,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:04,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131368055] [2021-06-05 13:50:04,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131368055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:04,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950900800] [2021-06-05 13:50:04,727 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 13:50:04,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:50:04,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:04,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:50:04,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:04,962 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 13:50:04,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950900800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:04,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:04,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-06-05 13:50:04,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116889529] [2021-06-05 13:50:04,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:50:04,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:04,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:50:04,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:50:04,963 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 13:50:05,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:05,390 INFO L93 Difference]: Finished difference Result 26690 states and 84238 transitions. [2021-06-05 13:50:05,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:50:05,390 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 13:50:05,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:05,546 INFO L225 Difference]: With dead ends: 26690 [2021-06-05 13:50:05,547 INFO L226 Difference]: Without dead ends: 26677 [2021-06-05 13:50:05,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 375.5ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:50:05,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26677 states. [2021-06-05 13:50:05,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26677 to 26188. [2021-06-05 13:50:05,921 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 13:50:05,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26188 states to 26188 states and 83127 transitions. [2021-06-05 13:50:05,982 INFO L78 Accepts]: Start accepts. Automaton has 26188 states and 83127 transitions. Word has length 25 [2021-06-05 13:50:05,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:05,982 INFO L482 AbstractCegarLoop]: Abstraction has 26188 states and 83127 transitions. [2021-06-05 13:50:05,982 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 13:50:05,982 INFO L276 IsEmpty]: Start isEmpty. Operand 26188 states and 83127 transitions. [2021-06-05 13:50:06,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:06,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:06,020 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:06,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable889 [2021-06-05 13:50:06,225 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:06,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:06,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1766104383, now seen corresponding path program 487 times [2021-06-05 13:50:06,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:06,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22233681] [2021-06-05 13:50:06,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:06,375 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 13:50:06,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:06,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22233681] [2021-06-05 13:50:06,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22233681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:06,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433154866] [2021-06-05 13:50:06,376 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 13:50:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:06,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:50:06,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:06,597 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 13:50:06,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433154866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:06,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:06,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-06-05 13:50:06,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176780223] [2021-06-05 13:50:06,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:50:06,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:06,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:50:06,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:50:06,598 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 13:50:07,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:07,049 INFO L93 Difference]: Finished difference Result 26573 states and 83882 transitions. [2021-06-05 13:50:07,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:50:07,049 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 13:50:07,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:07,098 INFO L225 Difference]: With dead ends: 26573 [2021-06-05 13:50:07,099 INFO L226 Difference]: Without dead ends: 26557 [2021-06-05 13:50:07,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 362.9ms TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:50:07,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26557 states. [2021-06-05 13:50:07,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26557 to 26197. [2021-06-05 13:50:07,577 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 13:50:07,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26197 states to 26197 states and 83139 transitions. [2021-06-05 13:50:07,642 INFO L78 Accepts]: Start accepts. Automaton has 26197 states and 83139 transitions. Word has length 25 [2021-06-05 13:50:07,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:07,642 INFO L482 AbstractCegarLoop]: Abstraction has 26197 states and 83139 transitions. [2021-06-05 13:50:07,642 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 13:50:07,642 INFO L276 IsEmpty]: Start isEmpty. Operand 26197 states and 83139 transitions. [2021-06-05 13:50:07,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:07,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:07,682 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:07,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable892,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:07,882 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:07,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:07,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1178359061, now seen corresponding path program 488 times [2021-06-05 13:50:07,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:07,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825636610] [2021-06-05 13:50:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:08,036 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 13:50:08,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:08,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825636610] [2021-06-05 13:50:08,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825636610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:08,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643960309] [2021-06-05 13:50:08,037 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 13:50:08,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:50:08,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:08,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:50:08,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:08,238 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 13:50:08,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643960309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:08,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:08,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-06-05 13:50:08,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056895631] [2021-06-05 13:50:08,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:50:08,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:08,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:50:08,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:50:08,239 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 13:50:08,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:08,676 INFO L93 Difference]: Finished difference Result 26468 states and 83627 transitions. [2021-06-05 13:50:08,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:50:08,676 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 13:50:08,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:08,729 INFO L225 Difference]: With dead ends: 26468 [2021-06-05 13:50:08,730 INFO L226 Difference]: Without dead ends: 26461 [2021-06-05 13:50:08,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 357.4ms TimeCoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:50:08,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26461 states. [2021-06-05 13:50:09,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26461 to 26194. [2021-06-05 13:50:09,159 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 13:50:09,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26194 states to 26194 states and 83130 transitions. [2021-06-05 13:50:09,225 INFO L78 Accepts]: Start accepts. Automaton has 26194 states and 83130 transitions. Word has length 25 [2021-06-05 13:50:09,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:09,226 INFO L482 AbstractCegarLoop]: Abstraction has 26194 states and 83130 transitions. [2021-06-05 13:50:09,226 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 13:50:09,226 INFO L276 IsEmpty]: Start isEmpty. Operand 26194 states and 83130 transitions. [2021-06-05 13:50:09,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:09,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:09,264 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:09,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable895 [2021-06-05 13:50:09,467 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:09,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:09,468 INFO L82 PathProgramCache]: Analyzing trace with hash -599983809, now seen corresponding path program 489 times [2021-06-05 13:50:09,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:09,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575055544] [2021-06-05 13:50:09,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:09,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:09,631 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 13:50:09,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:09,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575055544] [2021-06-05 13:50:09,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575055544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:09,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458995493] [2021-06-05 13:50:09,631 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 13:50:09,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:50:09,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:09,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:50:09,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:09,867 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 13:50:09,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458995493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:09,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:09,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-06-05 13:50:09,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974420718] [2021-06-05 13:50:09,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:50:09,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:09,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:50:09,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:50:09,868 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 13:50:10,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:10,228 INFO L93 Difference]: Finished difference Result 26478 states and 83625 transitions. [2021-06-05 13:50:10,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:50:10,228 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 13:50:10,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:10,279 INFO L225 Difference]: With dead ends: 26478 [2021-06-05 13:50:10,279 INFO L226 Difference]: Without dead ends: 26462 [2021-06-05 13:50:10,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 381.4ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:50:10,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26462 states. [2021-06-05 13:50:10,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26462 to 26156. [2021-06-05 13:50:10,709 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 13:50:10,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26156 states to 26156 states and 82989 transitions. [2021-06-05 13:50:10,777 INFO L78 Accepts]: Start accepts. Automaton has 26156 states and 82989 transitions. Word has length 25 [2021-06-05 13:50:10,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:10,778 INFO L482 AbstractCegarLoop]: Abstraction has 26156 states and 82989 transitions. [2021-06-05 13:50:10,778 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 13:50:10,778 INFO L276 IsEmpty]: Start isEmpty. Operand 26156 states and 82989 transitions. [2021-06-05 13:50:10,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:10,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:10,818 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:11,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable898,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:11,025 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:11,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:11,025 INFO L82 PathProgramCache]: Analyzing trace with hash -301930851, now seen corresponding path program 490 times [2021-06-05 13:50:11,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:11,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275766235] [2021-06-05 13:50:11,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:11,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:11,175 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 13:50:11,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:11,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275766235] [2021-06-05 13:50:11,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275766235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:11,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568462281] [2021-06-05 13:50:11,176 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 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 13:50:11,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:50:11,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:11,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:50:11,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:11,398 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 13:50:11,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568462281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:11,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:11,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-06-05 13:50:11,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142086859] [2021-06-05 13:50:11,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:50:11,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:11,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:50:11,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:50:11,399 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 13:50:11,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:11,826 INFO L93 Difference]: Finished difference Result 26350 states and 83325 transitions. [2021-06-05 13:50:11,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:50:11,827 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 13:50:11,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:11,878 INFO L225 Difference]: With dead ends: 26350 [2021-06-05 13:50:11,878 INFO L226 Difference]: Without dead ends: 26331 [2021-06-05 13:50:11,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 366.6ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:50:11,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26331 states. [2021-06-05 13:50:12,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26331 to 26122. [2021-06-05 13:50:12,339 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 13:50:12,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26122 states to 26122 states and 82887 transitions. [2021-06-05 13:50:12,403 INFO L78 Accepts]: Start accepts. Automaton has 26122 states and 82887 transitions. Word has length 25 [2021-06-05 13:50:12,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:12,403 INFO L482 AbstractCegarLoop]: Abstraction has 26122 states and 82887 transitions. [2021-06-05 13:50:12,403 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 13:50:12,403 INFO L276 IsEmpty]: Start isEmpty. Operand 26122 states and 82887 transitions. [2021-06-05 13:50:12,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:12,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:12,445 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:12,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable901,494 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:12,645 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:12,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:12,645 INFO L82 PathProgramCache]: Analyzing trace with hash 869072767, now seen corresponding path program 491 times [2021-06-05 13:50:12,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:12,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723519517] [2021-06-05 13:50:12,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:12,799 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 13:50:12,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:12,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723519517] [2021-06-05 13:50:12,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723519517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:12,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810950197] [2021-06-05 13:50:12,799 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 13:50:12,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:50:12,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:12,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:50:12,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:13,002 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 13:50:13,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810950197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:13,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:13,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-06-05 13:50:13,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601757874] [2021-06-05 13:50:13,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:50:13,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:13,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:50:13,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:50:13,003 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 13:50:13,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:13,415 INFO L93 Difference]: Finished difference Result 26878 states and 84798 transitions. [2021-06-05 13:50:13,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:50:13,415 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 13:50:13,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:13,465 INFO L225 Difference]: With dead ends: 26878 [2021-06-05 13:50:13,465 INFO L226 Difference]: Without dead ends: 26868 [2021-06-05 13:50:13,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 324.8ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:50:13,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26868 states. [2021-06-05 13:50:13,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26868 to 26338. [2021-06-05 13:50:13,891 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 13:50:13,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26338 states to 26338 states and 83651 transitions. [2021-06-05 13:50:13,956 INFO L78 Accepts]: Start accepts. Automaton has 26338 states and 83651 transitions. Word has length 25 [2021-06-05 13:50:13,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:13,956 INFO L482 AbstractCegarLoop]: Abstraction has 26338 states and 83651 transitions. [2021-06-05 13:50:13,956 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 13:50:13,956 INFO L276 IsEmpty]: Start isEmpty. Operand 26338 states and 83651 transitions. [2021-06-05 13:50:13,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:13,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:13,995 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:14,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable904,495 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:14,196 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:14,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:14,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1811191805, now seen corresponding path program 492 times [2021-06-05 13:50:14,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:14,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719942892] [2021-06-05 13:50:14,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:14,348 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 13:50:14,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:14,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719942892] [2021-06-05 13:50:14,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719942892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:14,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804251941] [2021-06-05 13:50:14,348 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 13:50:14,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:50:14,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:14,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:50:14,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:14,558 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 13:50:14,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804251941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:14,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:14,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-06-05 13:50:14,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892470882] [2021-06-05 13:50:14,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:50:14,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:14,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:50:14,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:50:14,559 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 13:50:14,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:14,981 INFO L93 Difference]: Finished difference Result 26859 states and 84730 transitions. [2021-06-05 13:50:14,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:50:14,982 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 13:50:14,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:15,029 INFO L225 Difference]: With dead ends: 26859 [2021-06-05 13:50:15,029 INFO L226 Difference]: Without dead ends: 26852 [2021-06-05 13:50:15,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 332.8ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:50:15,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26852 states. [2021-06-05 13:50:15,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26852 to 26333. [2021-06-05 13:50:15,448 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 13:50:15,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26333 states to 26333 states and 83631 transitions. [2021-06-05 13:50:15,515 INFO L78 Accepts]: Start accepts. Automaton has 26333 states and 83631 transitions. Word has length 25 [2021-06-05 13:50:15,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:15,515 INFO L482 AbstractCegarLoop]: Abstraction has 26333 states and 83631 transitions. [2021-06-05 13:50:15,515 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 13:50:15,515 INFO L276 IsEmpty]: Start isEmpty. Operand 26333 states and 83631 transitions. [2021-06-05 13:50:15,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:15,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:15,555 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:15,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable907,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:15,756 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:15,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:15,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1440527573, now seen corresponding path program 493 times [2021-06-05 13:50:15,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:15,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375783517] [2021-06-05 13:50:15,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:15,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:15,895 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 13:50:15,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:15,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375783517] [2021-06-05 13:50:15,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375783517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:15,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389515490] [2021-06-05 13:50:15,895 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 13:50:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:15,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:50:15,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:16,090 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 13:50:16,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389515490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:16,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:16,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-05 13:50:16,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154367191] [2021-06-05 13:50:16,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:50:16,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:16,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:50:16,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:50:16,091 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 13:50:16,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:16,473 INFO L93 Difference]: Finished difference Result 26840 states and 84655 transitions. [2021-06-05 13:50:16,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:50:16,473 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 13:50:16,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:16,525 INFO L225 Difference]: With dead ends: 26840 [2021-06-05 13:50:16,525 INFO L226 Difference]: Without dead ends: 26827 [2021-06-05 13:50:16,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 316.4ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:50:16,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26827 states. [2021-06-05 13:50:16,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26827 to 26329. [2021-06-05 13:50:16,992 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 13:50:17,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26329 states to 26329 states and 83613 transitions. [2021-06-05 13:50:17,071 INFO L78 Accepts]: Start accepts. Automaton has 26329 states and 83613 transitions. Word has length 25 [2021-06-05 13:50:17,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:17,071 INFO L482 AbstractCegarLoop]: Abstraction has 26329 states and 83613 transitions. [2021-06-05 13:50:17,071 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 13:50:17,071 INFO L276 IsEmpty]: Start isEmpty. Operand 26329 states and 83613 transitions. [2021-06-05 13:50:17,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:17,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:17,120 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:17,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable910 [2021-06-05 13:50:17,333 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:17,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:17,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1975757375, now seen corresponding path program 494 times [2021-06-05 13:50:17,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:17,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041741563] [2021-06-05 13:50:17,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:17,485 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 13:50:17,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:17,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041741563] [2021-06-05 13:50:17,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041741563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:17,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789700593] [2021-06-05 13:50:17,486 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 13:50:17,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:50:17,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:17,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:50:17,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:17,684 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 13:50:17,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789700593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:17,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:17,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-05 13:50:17,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114796627] [2021-06-05 13:50:17,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:50:17,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:17,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:50:17,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:50:17,685 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 13:50:18,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:18,172 INFO L93 Difference]: Finished difference Result 26818 states and 84533 transitions. [2021-06-05 13:50:18,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:50:18,172 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 13:50:18,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:18,221 INFO L225 Difference]: With dead ends: 26818 [2021-06-05 13:50:18,221 INFO L226 Difference]: Without dead ends: 26802 [2021-06-05 13:50:18,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 349.8ms TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:50:18,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26802 states. [2021-06-05 13:50:18,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26802 to 26325. [2021-06-05 13:50:18,663 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 13:50:18,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26325 states to 26325 states and 83596 transitions. [2021-06-05 13:50:18,734 INFO L78 Accepts]: Start accepts. Automaton has 26325 states and 83596 transitions. Word has length 25 [2021-06-05 13:50:18,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:18,735 INFO L482 AbstractCegarLoop]: Abstraction has 26325 states and 83596 transitions. [2021-06-05 13:50:18,735 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 13:50:18,735 INFO L276 IsEmpty]: Start isEmpty. Operand 26325 states and 83596 transitions. [2021-06-05 13:50:18,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:18,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:18,779 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:18,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable913,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:18,993 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:18,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:18,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1388012053, now seen corresponding path program 495 times [2021-06-05 13:50:18,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:18,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902627070] [2021-06-05 13:50:18,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:19,140 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 13:50:19,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:19,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902627070] [2021-06-05 13:50:19,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902627070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:19,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018913695] [2021-06-05 13:50:19,141 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 13:50:19,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:50:19,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:19,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:50:19,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:19,326 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 13:50:19,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018913695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:19,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:19,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-05 13:50:19,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143234455] [2021-06-05 13:50:19,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:50:19,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:19,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:50:19,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:50:19,327 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 13:50:19,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:19,821 INFO L93 Difference]: Finished difference Result 26741 states and 84363 transitions. [2021-06-05 13:50:19,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:50:19,821 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 13:50:19,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:19,871 INFO L225 Difference]: With dead ends: 26741 [2021-06-05 13:50:19,871 INFO L226 Difference]: Without dead ends: 26722 [2021-06-05 13:50:19,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 349.1ms TimeCoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:50:19,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26722 states. [2021-06-05 13:50:20,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26722 to 26330. [2021-06-05 13:50:20,258 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 13:50:20,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26330 states to 26330 states and 83598 transitions. [2021-06-05 13:50:20,320 INFO L78 Accepts]: Start accepts. Automaton has 26330 states and 83598 transitions. Word has length 25 [2021-06-05 13:50:20,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:20,320 INFO L482 AbstractCegarLoop]: Abstraction has 26330 states and 83598 transitions. [2021-06-05 13:50:20,320 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 13:50:20,320 INFO L276 IsEmpty]: Start isEmpty. Operand 26330 states and 83598 transitions. [2021-06-05 13:50:20,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:20,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:20,359 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:20,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable916,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:20,559 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:20,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:20,560 INFO L82 PathProgramCache]: Analyzing trace with hash 347776255, now seen corresponding path program 496 times [2021-06-05 13:50:20,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:20,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141030006] [2021-06-05 13:50:20,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:20,713 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 13:50:20,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:20,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141030006] [2021-06-05 13:50:20,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141030006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:20,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340908908] [2021-06-05 13:50:20,713 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 13:50:20,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:50:20,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:20,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:50:20,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:20,915 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 13:50:20,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340908908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:20,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:20,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-05 13:50:20,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417189794] [2021-06-05 13:50:20,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:50:20,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:20,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:50:20,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:50:20,916 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 13:50:21,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:21,394 INFO L93 Difference]: Finished difference Result 26637 states and 84135 transitions. [2021-06-05 13:50:21,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:50:21,394 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 13:50:21,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:21,525 INFO L225 Difference]: With dead ends: 26637 [2021-06-05 13:50:21,526 INFO L226 Difference]: Without dead ends: 26630 [2021-06-05 13:50:21,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 368.0ms TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:50:21,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26630 states. [2021-06-05 13:50:21,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26630 to 26326. [2021-06-05 13:50:21,889 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 13:50:21,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26326 states to 26326 states and 83586 transitions. [2021-06-05 13:50:21,952 INFO L78 Accepts]: Start accepts. Automaton has 26326 states and 83586 transitions. Word has length 25 [2021-06-05 13:50:21,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:21,952 INFO L482 AbstractCegarLoop]: Abstraction has 26326 states and 83586 transitions. [2021-06-05 13:50:21,952 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 13:50:21,953 INFO L276 IsEmpty]: Start isEmpty. Operand 26326 states and 83586 transitions. [2021-06-05 13:50:21,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:21,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:21,992 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:22,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable919 [2021-06-05 13:50:22,207 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:22,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:22,207 INFO L82 PathProgramCache]: Analyzing trace with hash 755669175, now seen corresponding path program 497 times [2021-06-05 13:50:22,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:22,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582888095] [2021-06-05 13:50:22,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:22,382 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 13:50:22,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:22,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582888095] [2021-06-05 13:50:22,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582888095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:22,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233046257] [2021-06-05 13:50:22,382 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 13:50:22,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:50:22,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:22,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:50:22,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:22,631 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 13:50:22,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233046257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:22,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:22,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-06-05 13:50:22,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099326395] [2021-06-05 13:50:22,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:50:22,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:22,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:50:22,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:50:22,632 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 13:50:23,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:23,013 INFO L93 Difference]: Finished difference Result 26655 states and 84164 transitions. [2021-06-05 13:50:23,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:50:23,013 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 13:50:23,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:23,056 INFO L225 Difference]: With dead ends: 26655 [2021-06-05 13:50:23,056 INFO L226 Difference]: Without dead ends: 26639 [2021-06-05 13:50:23,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 405.1ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:50:23,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26639 states. [2021-06-05 13:50:23,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26639 to 26300. [2021-06-05 13:50:23,471 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 13:50:23,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26300 states to 26300 states and 83489 transitions. [2021-06-05 13:50:23,538 INFO L78 Accepts]: Start accepts. Automaton has 26300 states and 83489 transitions. Word has length 25 [2021-06-05 13:50:23,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:23,538 INFO L482 AbstractCegarLoop]: Abstraction has 26300 states and 83489 transitions. [2021-06-05 13:50:23,538 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 13:50:23,538 INFO L276 IsEmpty]: Start isEmpty. Operand 26300 states and 83489 transitions. [2021-06-05 13:50:23,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:23,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:23,579 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:23,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable922,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:23,779 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:23,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:23,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1053722133, now seen corresponding path program 498 times [2021-06-05 13:50:23,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:23,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222088090] [2021-06-05 13:50:23,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:23,924 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 13:50:23,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:23,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222088090] [2021-06-05 13:50:23,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222088090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:23,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645510351] [2021-06-05 13:50:23,925 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 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 13:50:23,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:50:23,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:23,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:50:23,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:24,135 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 13:50:24,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645510351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:24,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:24,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-06-05 13:50:24,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719054364] [2021-06-05 13:50:24,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:50:24,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:24,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:50:24,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:50:24,136 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 13:50:24,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:24,545 INFO L93 Difference]: Finished difference Result 26683 states and 84164 transitions. [2021-06-05 13:50:24,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:50:24,546 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 13:50:24,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:24,595 INFO L225 Difference]: With dead ends: 26683 [2021-06-05 13:50:24,595 INFO L226 Difference]: Without dead ends: 26664 [2021-06-05 13:50:24,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 355.6ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:50:24,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26664 states. [2021-06-05 13:50:24,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26664 to 26276. [2021-06-05 13:50:25,021 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 13:50:25,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26276 states to 26276 states and 83406 transitions. [2021-06-05 13:50:25,080 INFO L78 Accepts]: Start accepts. Automaton has 26276 states and 83406 transitions. Word has length 25 [2021-06-05 13:50:25,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:25,080 INFO L482 AbstractCegarLoop]: Abstraction has 26276 states and 83406 transitions. [2021-06-05 13:50:25,080 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 13:50:25,080 INFO L276 IsEmpty]: Start isEmpty. Operand 26276 states and 83406 transitions. [2021-06-05 13:50:25,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:25,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:25,113 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:25,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable925 [2021-06-05 13:50:25,313 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:25,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:25,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1703429239, now seen corresponding path program 499 times [2021-06-05 13:50:25,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:25,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975335319] [2021-06-05 13:50:25,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:25,463 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 13:50:25,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:25,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975335319] [2021-06-05 13:50:25,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975335319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:25,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198747397] [2021-06-05 13:50:25,464 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 13:50:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:25,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:50:25,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:25,650 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 13:50:25,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198747397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:25,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:25,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-05 13:50:25,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839934979] [2021-06-05 13:50:25,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:50:25,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:25,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:50:25,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:50:25,651 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 13:50:26,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:26,144 INFO L93 Difference]: Finished difference Result 26515 states and 83825 transitions. [2021-06-05 13:50:26,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:50:26,144 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 13:50:26,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:26,190 INFO L225 Difference]: With dead ends: 26515 [2021-06-05 13:50:26,191 INFO L226 Difference]: Without dead ends: 26493 [2021-06-05 13:50:26,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 353.3ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:50:26,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26493 states. [2021-06-05 13:50:26,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26493 to 26252. [2021-06-05 13:50:26,612 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 13:50:26,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26252 states to 26252 states and 83334 transitions. [2021-06-05 13:50:26,677 INFO L78 Accepts]: Start accepts. Automaton has 26252 states and 83334 transitions. Word has length 25 [2021-06-05 13:50:26,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:26,678 INFO L482 AbstractCegarLoop]: Abstraction has 26252 states and 83334 transitions. [2021-06-05 13:50:26,678 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 13:50:26,678 INFO L276 IsEmpty]: Start isEmpty. Operand 26252 states and 83334 transitions. [2021-06-05 13:50:26,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:26,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:26,715 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:26,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable928,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:26,921 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:26,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:26,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1221619073, now seen corresponding path program 500 times [2021-06-05 13:50:26,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:26,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637143200] [2021-06-05 13:50:26,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:27,075 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 13:50:27,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:27,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637143200] [2021-06-05 13:50:27,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637143200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:27,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407183464] [2021-06-05 13:50:27,076 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 13:50:27,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:50:27,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:27,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:50:27,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:27,278 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 13:50:27,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407183464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:27,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:27,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-06-05 13:50:27,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771355746] [2021-06-05 13:50:27,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:50:27,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:27,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:50:27,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:50:27,279 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 13:50:27,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:27,687 INFO L93 Difference]: Finished difference Result 27031 states and 85190 transitions. [2021-06-05 13:50:27,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:50:27,687 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 13:50:27,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:27,740 INFO L225 Difference]: With dead ends: 27031 [2021-06-05 13:50:27,740 INFO L226 Difference]: Without dead ends: 27021 [2021-06-05 13:50:27,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 335.4ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:50:27,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27021 states. [2021-06-05 13:50:28,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27021 to 26424. [2021-06-05 13:50:28,160 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 13:50:28,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26424 states to 26424 states and 83935 transitions. [2021-06-05 13:50:28,230 INFO L78 Accepts]: Start accepts. Automaton has 26424 states and 83935 transitions. Word has length 25 [2021-06-05 13:50:28,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:28,230 INFO L482 AbstractCegarLoop]: Abstraction has 26424 states and 83935 transitions. [2021-06-05 13:50:28,230 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 13:50:28,230 INFO L276 IsEmpty]: Start isEmpty. Operand 26424 states and 83935 transitions. [2021-06-05 13:50:28,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:28,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:28,269 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:28,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable931,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:28,470 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:28,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:28,470 INFO L82 PathProgramCache]: Analyzing trace with hash 393083651, now seen corresponding path program 501 times [2021-06-05 13:50:28,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:28,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353370487] [2021-06-05 13:50:28,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:28,625 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 13:50:28,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:28,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353370487] [2021-06-05 13:50:28,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353370487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:28,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816067909] [2021-06-05 13:50:28,625 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 13:50:28,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:50:28,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:28,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:50:28,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:28,811 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 13:50:28,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816067909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:28,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:28,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-06-05 13:50:28,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337714630] [2021-06-05 13:50:28,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:50:28,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:28,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:50:28,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:50:28,812 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 13:50:29,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:29,176 INFO L93 Difference]: Finished difference Result 27015 states and 85143 transitions. [2021-06-05 13:50:29,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:50:29,177 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 13:50:29,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:29,227 INFO L225 Difference]: With dead ends: 27015 [2021-06-05 13:50:29,228 INFO L226 Difference]: Without dead ends: 27008 [2021-06-05 13:50:29,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 309.7ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:50:29,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27008 states. [2021-06-05 13:50:29,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27008 to 26408. [2021-06-05 13:50:29,638 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 13:50:29,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26408 states to 26408 states and 83882 transitions. [2021-06-05 13:50:29,703 INFO L78 Accepts]: Start accepts. Automaton has 26408 states and 83882 transitions. Word has length 25 [2021-06-05 13:50:29,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:29,703 INFO L482 AbstractCegarLoop]: Abstraction has 26408 states and 83882 transitions. [2021-06-05 13:50:29,703 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 13:50:29,703 INFO L276 IsEmpty]: Start isEmpty. Operand 26408 states and 83882 transitions. [2021-06-05 13:50:29,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:29,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:29,741 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:29,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable934 [2021-06-05 13:50:29,941 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:29,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:29,941 INFO L82 PathProgramCache]: Analyzing trace with hash -650164267, now seen corresponding path program 502 times [2021-06-05 13:50:29,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:29,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935496320] [2021-06-05 13:50:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:30,101 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 13:50:30,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:30,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935496320] [2021-06-05 13:50:30,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935496320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:30,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906444392] [2021-06-05 13:50:30,102 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 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 13:50:30,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:50:30,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:30,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:50:30,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:30,329 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 13:50:30,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906444392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:30,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:30,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-05 13:50:30,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116629900] [2021-06-05 13:50:30,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:50:30,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:30,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:50:30,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:50:30,330 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 13:50:30,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:30,779 INFO L93 Difference]: Finished difference Result 27006 states and 85093 transitions. [2021-06-05 13:50:30,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:50:30,779 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 13:50:30,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:30,831 INFO L225 Difference]: With dead ends: 27006 [2021-06-05 13:50:30,831 INFO L226 Difference]: Without dead ends: 26993 [2021-06-05 13:50:30,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 346.4ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:50:30,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26993 states. [2021-06-05 13:50:31,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26993 to 26403. [2021-06-05 13:50:31,265 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 13:50:31,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26403 states to 26403 states and 83861 transitions. [2021-06-05 13:50:31,328 INFO L78 Accepts]: Start accepts. Automaton has 26403 states and 83861 transitions. Word has length 25 [2021-06-05 13:50:31,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:31,329 INFO L482 AbstractCegarLoop]: Abstraction has 26403 states and 83861 transitions. [2021-06-05 13:50:31,329 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 13:50:31,329 INFO L276 IsEmpty]: Start isEmpty. Operand 26403 states and 83861 transitions. [2021-06-05 13:50:31,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:31,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:31,364 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:31,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable937,506 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:31,565 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:31,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:31,565 INFO L82 PathProgramCache]: Analyzing trace with hash -114934465, now seen corresponding path program 503 times [2021-06-05 13:50:31,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:31,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567485891] [2021-06-05 13:50:31,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:31,722 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 13:50:31,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:31,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567485891] [2021-06-05 13:50:31,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567485891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:31,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757341059] [2021-06-05 13:50:31,722 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 13:50:31,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:50:31,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:31,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:50:31,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:31,915 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 13:50:31,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757341059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:31,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:31,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-05 13:50:31,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468459438] [2021-06-05 13:50:31,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:50:31,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:31,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:50:31,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:50:31,916 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 13:50:32,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:32,317 INFO L93 Difference]: Finished difference Result 27006 states and 85046 transitions. [2021-06-05 13:50:32,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:50:32,317 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 13:50:32,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:32,359 INFO L225 Difference]: With dead ends: 27006 [2021-06-05 13:50:32,359 INFO L226 Difference]: Without dead ends: 26990 [2021-06-05 13:50:32,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 320.2ms TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:50:32,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26990 states. [2021-06-05 13:50:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26990 to 26398. [2021-06-05 13:50:32,750 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 13:50:32,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26398 states to 26398 states and 83841 transitions. [2021-06-05 13:50:32,811 INFO L78 Accepts]: Start accepts. Automaton has 26398 states and 83841 transitions. Word has length 25 [2021-06-05 13:50:32,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:32,811 INFO L482 AbstractCegarLoop]: Abstraction has 26398 states and 83841 transitions. [2021-06-05 13:50:32,811 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 13:50:32,811 INFO L276 IsEmpty]: Start isEmpty. Operand 26398 states and 83841 transitions. [2021-06-05 13:50:32,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:32,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:32,850 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:33,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable940 [2021-06-05 13:50:33,050 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:33,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:33,051 INFO L82 PathProgramCache]: Analyzing trace with hash -702679787, now seen corresponding path program 504 times [2021-06-05 13:50:33,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:33,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663501038] [2021-06-05 13:50:33,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:33,198 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 13:50:33,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:33,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663501038] [2021-06-05 13:50:33,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663501038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:33,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781252590] [2021-06-05 13:50:33,199 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 13:50:33,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:50:33,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:33,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:50:33,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:33,379 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 13:50:33,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781252590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:33,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:33,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-05 13:50:33,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435526295] [2021-06-05 13:50:33,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:50:33,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:33,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:50:33,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:50:33,380 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 13:50:33,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:33,880 INFO L93 Difference]: Finished difference Result 27010 states and 85005 transitions. [2021-06-05 13:50:33,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:50:33,880 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 13:50:33,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:33,932 INFO L225 Difference]: With dead ends: 27010 [2021-06-05 13:50:33,932 INFO L226 Difference]: Without dead ends: 26991 [2021-06-05 13:50:33,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 341.7ms TimeCoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:50:33,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26991 states. [2021-06-05 13:50:34,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26991 to 26393. [2021-06-05 13:50:34,356 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 13:50:34,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26393 states to 26393 states and 83822 transitions. [2021-06-05 13:50:34,414 INFO L78 Accepts]: Start accepts. Automaton has 26393 states and 83822 transitions. Word has length 25 [2021-06-05 13:50:34,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:34,414 INFO L482 AbstractCegarLoop]: Abstraction has 26393 states and 83822 transitions. [2021-06-05 13:50:34,414 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 13:50:34,414 INFO L276 IsEmpty]: Start isEmpty. Operand 26393 states and 83822 transitions. [2021-06-05 13:50:34,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:34,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:34,448 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:34,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable943,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:34,648 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:34,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:34,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1742915585, now seen corresponding path program 505 times [2021-06-05 13:50:34,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:34,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355245563] [2021-06-05 13:50:34,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:34,815 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 13:50:34,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:34,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355245563] [2021-06-05 13:50:34,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355245563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:34,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615711018] [2021-06-05 13:50:34,815 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 13:50:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:34,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:50:34,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:34,986 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 13:50:34,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615711018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:34,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:34,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-05 13:50:34,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974737887] [2021-06-05 13:50:34,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:50:34,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:34,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:50:34,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:50:34,987 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 13:50:35,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:35,546 INFO L93 Difference]: Finished difference Result 26898 states and 84763 transitions. [2021-06-05 13:50:35,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:50:35,546 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 13:50:35,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:35,590 INFO L225 Difference]: With dead ends: 26898 [2021-06-05 13:50:35,591 INFO L226 Difference]: Without dead ends: 26876 [2021-06-05 13:50:35,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 356.9ms TimeCoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:50:35,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26876 states. [2021-06-05 13:50:35,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26876 to 26388. [2021-06-05 13:50:36,020 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 13:50:36,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26388 states to 26388 states and 83804 transitions. [2021-06-05 13:50:36,087 INFO L78 Accepts]: Start accepts. Automaton has 26388 states and 83804 transitions. Word has length 25 [2021-06-05 13:50:36,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:36,087 INFO L482 AbstractCegarLoop]: Abstraction has 26388 states and 83804 transitions. [2021-06-05 13:50:36,087 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 13:50:36,087 INFO L276 IsEmpty]: Start isEmpty. Operand 26388 states and 83804 transitions. [2021-06-05 13:50:36,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:36,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:36,129 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:36,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable946 [2021-06-05 13:50:36,329 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:36,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:36,330 INFO L82 PathProgramCache]: Analyzing trace with hash 369513045, now seen corresponding path program 506 times [2021-06-05 13:50:36,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:36,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005389251] [2021-06-05 13:50:36,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:36,494 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 13:50:36,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:36,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005389251] [2021-06-05 13:50:36,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005389251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:36,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960705939] [2021-06-05 13:50:36,494 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 13:50:36,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:50:36,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:36,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 13:50:36,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:36,673 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 13:50:36,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960705939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:36,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:36,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-05 13:50:36,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619345384] [2021-06-05 13:50:36,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:50:36,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:36,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:50:36,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:50:36,674 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 13:50:37,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:37,276 INFO L93 Difference]: Finished difference Result 26777 states and 84498 transitions. [2021-06-05 13:50:37,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:50:37,277 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 13:50:37,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:37,327 INFO L225 Difference]: With dead ends: 26777 [2021-06-05 13:50:37,327 INFO L226 Difference]: Without dead ends: 26770 [2021-06-05 13:50:37,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 374.6ms TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:50:37,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26770 states. [2021-06-05 13:50:37,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26770 to 26383. [2021-06-05 13:50:37,737 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 13:50:37,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26383 states to 26383 states and 83789 transitions. [2021-06-05 13:50:37,790 INFO L78 Accepts]: Start accepts. Automaton has 26383 states and 83789 transitions. Word has length 25 [2021-06-05 13:50:37,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:37,790 INFO L482 AbstractCegarLoop]: Abstraction has 26383 states and 83789 transitions. [2021-06-05 13:50:37,790 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 13:50:37,790 INFO L276 IsEmpty]: Start isEmpty. Operand 26383 states and 83789 transitions. [2021-06-05 13:50:37,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:50:37,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:37,824 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:38,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable949,510 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:38,024 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:38,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:38,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1225505269, now seen corresponding path program 507 times [2021-06-05 13:50:38,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:38,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569928722] [2021-06-05 13:50:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:38,098 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 13:50:38,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:38,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569928722] [2021-06-05 13:50:38,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569928722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:38,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232830559] [2021-06-05 13:50:38,099 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 13:50:38,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:50:38,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:38,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:50:38,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:38,245 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 13:50:38,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232830559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:38,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:38,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-06-05 13:50:38,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959025371] [2021-06-05 13:50:38,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:50:38,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:38,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:50:38,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:50:38,245 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 13:50:38,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:38,516 INFO L93 Difference]: Finished difference Result 34009 states and 106082 transitions. [2021-06-05 13:50:38,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:50:38,517 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 13:50:38,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:38,583 INFO L225 Difference]: With dead ends: 34009 [2021-06-05 13:50:38,583 INFO L226 Difference]: Without dead ends: 33983 [2021-06-05 13:50:38,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 242.2ms TimeCoverageRelationStatistics Valid=386, Invalid=1174, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 13:50:38,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33983 states. [2021-06-05 13:50:39,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33983 to 26378. [2021-06-05 13:50:39,048 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 13:50:39,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26378 states to 26378 states and 83779 transitions. [2021-06-05 13:50:39,114 INFO L78 Accepts]: Start accepts. Automaton has 26378 states and 83779 transitions. Word has length 26 [2021-06-05 13:50:39,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:39,115 INFO L482 AbstractCegarLoop]: Abstraction has 26378 states and 83779 transitions. [2021-06-05 13:50:39,115 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 13:50:39,115 INFO L276 IsEmpty]: Start isEmpty. Operand 26378 states and 83779 transitions. [2021-06-05 13:50:39,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:50:39,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:39,155 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:39,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable952,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:39,356 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:39,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:39,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1488462363, now seen corresponding path program 508 times [2021-06-05 13:50:39,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:39,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064096518] [2021-06-05 13:50:39,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:39,433 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 13:50:39,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:39,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064096518] [2021-06-05 13:50:39,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064096518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:39,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602642632] [2021-06-05 13:50:39,434 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 13:50:39,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:50:39,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:39,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:50:39,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:39,683 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 13:50:39,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602642632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:39,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:39,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-06-05 13:50:39,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940354117] [2021-06-05 13:50:39,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:50:39,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:39,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:50:39,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:50:39,683 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 13:50:39,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:39,943 INFO L93 Difference]: Finished difference Result 34313 states and 106998 transitions. [2021-06-05 13:50:39,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:50:39,943 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 13:50:39,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:40,015 INFO L225 Difference]: With dead ends: 34313 [2021-06-05 13:50:40,015 INFO L226 Difference]: Without dead ends: 34313 [2021-06-05 13:50:40,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 299.5ms TimeCoverageRelationStatistics Valid=307, Invalid=685, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:50:40,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34313 states. [2021-06-05 13:50:40,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34313 to 26571. [2021-06-05 13:50:40,516 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 13:50:40,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26571 states to 26571 states and 84358 transitions. [2021-06-05 13:50:40,584 INFO L78 Accepts]: Start accepts. Automaton has 26571 states and 84358 transitions. Word has length 26 [2021-06-05 13:50:40,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:40,584 INFO L482 AbstractCegarLoop]: Abstraction has 26571 states and 84358 transitions. [2021-06-05 13:50:40,584 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 13:50:40,584 INFO L276 IsEmpty]: Start isEmpty. Operand 26571 states and 84358 transitions. [2021-06-05 13:50:40,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:50:40,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:40,622 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:40,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable953 [2021-06-05 13:50:40,822 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:40,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:40,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1597240143, now seen corresponding path program 509 times [2021-06-05 13:50:40,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:40,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837228722] [2021-06-05 13:50:40,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:40,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:40,895 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 13:50:40,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:40,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837228722] [2021-06-05 13:50:40,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837228722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:40,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476952223] [2021-06-05 13:50:40,896 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 13:50:40,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:50:40,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:40,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:50:40,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:41,045 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 13:50:41,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476952223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:41,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:41,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:50:41,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007709885] [2021-06-05 13:50:41,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:50:41,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:41,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:50:41,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:50:41,046 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 13:50:42,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:42,098 INFO L93 Difference]: Finished difference Result 38199 states and 118872 transitions. [2021-06-05 13:50:42,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 13:50:42,098 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 13:50:42,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:42,170 INFO L225 Difference]: With dead ends: 38199 [2021-06-05 13:50:42,171 INFO L226 Difference]: Without dead ends: 38187 [2021-06-05 13:50:42,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2365 ImplicationChecksByTransitivity, 819.4ms TimeCoverageRelationStatistics Valid=2504, Invalid=5506, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 13:50:42,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38187 states. [2021-06-05 13:50:42,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38187 to 30268. [2021-06-05 13:50:42,743 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 13:50:42,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30268 states to 30268 states and 96711 transitions. [2021-06-05 13:50:42,818 INFO L78 Accepts]: Start accepts. Automaton has 30268 states and 96711 transitions. Word has length 26 [2021-06-05 13:50:42,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:42,818 INFO L482 AbstractCegarLoop]: Abstraction has 30268 states and 96711 transitions. [2021-06-05 13:50:42,818 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 13:50:42,819 INFO L276 IsEmpty]: Start isEmpty. Operand 30268 states and 96711 transitions. [2021-06-05 13:50:42,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:50:42,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:42,864 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:43,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 513 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable954 [2021-06-05 13:50:43,073 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:43,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:43,073 INFO L82 PathProgramCache]: Analyzing trace with hash -2126272347, now seen corresponding path program 510 times [2021-06-05 13:50:43,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:43,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454926300] [2021-06-05 13:50:43,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:43,146 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 13:50:43,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:43,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454926300] [2021-06-05 13:50:43,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454926300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:43,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946447447] [2021-06-05 13:50:43,147 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 13:50:43,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:50:43,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:43,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:50:43,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:43,297 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 13:50:43,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946447447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:43,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:43,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:50:43,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170915599] [2021-06-05 13:50:43,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:50:43,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:43,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:50:43,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:50:43,298 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 13:50:44,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:44,422 INFO L93 Difference]: Finished difference Result 37783 states and 117254 transitions. [2021-06-05 13:50:44,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 13:50:44,422 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 13:50:44,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:44,492 INFO L225 Difference]: With dead ends: 37783 [2021-06-05 13:50:44,493 INFO L226 Difference]: Without dead ends: 37777 [2021-06-05 13:50:44,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2858 ImplicationChecksByTransitivity, 809.5ms TimeCoverageRelationStatistics Valid=2139, Invalid=6791, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 13:50:44,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37777 states. [2021-06-05 13:50:45,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37777 to 28751. [2021-06-05 13:50:45,044 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 13:50:45,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28751 states to 28751 states and 91238 transitions. [2021-06-05 13:50:45,114 INFO L78 Accepts]: Start accepts. Automaton has 28751 states and 91238 transitions. Word has length 26 [2021-06-05 13:50:45,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:45,115 INFO L482 AbstractCegarLoop]: Abstraction has 28751 states and 91238 transitions. [2021-06-05 13:50:45,115 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 13:50:45,115 INFO L276 IsEmpty]: Start isEmpty. Operand 28751 states and 91238 transitions. [2021-06-05 13:50:45,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:50:45,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:45,158 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:45,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable955,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:45,358 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:45,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:45,359 INFO L82 PathProgramCache]: Analyzing trace with hash 237123403, now seen corresponding path program 511 times [2021-06-05 13:50:45,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:45,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978425258] [2021-06-05 13:50:45,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:45,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:45,434 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 13:50:45,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:45,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978425258] [2021-06-05 13:50:45,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978425258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:45,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973813671] [2021-06-05 13:50:45,434 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 13:50:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:45,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:50:45,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:45,570 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 13:50:45,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973813671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:45,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:45,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:50:45,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696339987] [2021-06-05 13:50:45,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:50:45,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:45,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:50:45,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:50:45,571 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 13:50:46,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:46,863 INFO L93 Difference]: Finished difference Result 33431 states and 104589 transitions. [2021-06-05 13:50:46,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 13:50:46,863 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 13:50:46,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:46,926 INFO L225 Difference]: With dead ends: 33431 [2021-06-05 13:50:46,927 INFO L226 Difference]: Without dead ends: 33431 [2021-06-05 13:50:46,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 988.8ms TimeCoverageRelationStatistics Valid=3559, Invalid=6541, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 13:50:46,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33431 states. [2021-06-05 13:50:47,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33431 to 30211. [2021-06-05 13:50:47,446 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 13:50:47,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30211 states to 30211 states and 96252 transitions. [2021-06-05 13:50:47,519 INFO L78 Accepts]: Start accepts. Automaton has 30211 states and 96252 transitions. Word has length 26 [2021-06-05 13:50:47,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:47,519 INFO L482 AbstractCegarLoop]: Abstraction has 30211 states and 96252 transitions. [2021-06-05 13:50:47,519 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 13:50:47,519 INFO L276 IsEmpty]: Start isEmpty. Operand 30211 states and 96252 transitions. [2021-06-05 13:50:47,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:50:47,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:47,563 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:47,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable956,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:47,764 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:47,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:47,764 INFO L82 PathProgramCache]: Analyzing trace with hash -227467701, now seen corresponding path program 512 times [2021-06-05 13:50:47,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:47,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591505029] [2021-06-05 13:50:47,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:47,848 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 13:50:47,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:47,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591505029] [2021-06-05 13:50:47,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591505029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:47,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278440841] [2021-06-05 13:50:47,848 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 13:50:47,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:50:47,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:47,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:50:47,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:48,013 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 13:50:48,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278440841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:48,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:48,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:50:48,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537071396] [2021-06-05 13:50:48,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:50:48,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:48,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:50:48,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:50:48,014 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 13:50:49,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:49,409 INFO L93 Difference]: Finished difference Result 32625 states and 102515 transitions. [2021-06-05 13:50:49,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 13:50:49,409 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 13:50:49,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:49,460 INFO L225 Difference]: With dead ends: 32625 [2021-06-05 13:50:49,460 INFO L226 Difference]: Without dead ends: 32621 [2021-06-05 13:50:49,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3357 ImplicationChecksByTransitivity, 1038.8ms TimeCoverageRelationStatistics Valid=4219, Invalid=7991, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 13:50:49,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32621 states. [2021-06-05 13:50:49,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32621 to 27450. [2021-06-05 13:50:49,916 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 13:50:49,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27450 states to 27450 states and 86697 transitions. [2021-06-05 13:50:49,981 INFO L78 Accepts]: Start accepts. Automaton has 27450 states and 86697 transitions. Word has length 26 [2021-06-05 13:50:49,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:49,981 INFO L482 AbstractCegarLoop]: Abstraction has 27450 states and 86697 transitions. [2021-06-05 13:50:49,981 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 13:50:49,981 INFO L276 IsEmpty]: Start isEmpty. Operand 27450 states and 86697 transitions. [2021-06-05 13:50:50,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:50:50,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:50,022 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:50,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable957,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:50,223 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:50,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:50,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1591042545, now seen corresponding path program 513 times [2021-06-05 13:50:50,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:50,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275232411] [2021-06-05 13:50:50,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:50,302 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 13:50:50,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:50,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275232411] [2021-06-05 13:50:50,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275232411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:50,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563302980] [2021-06-05 13:50:50,302 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 13:50:50,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:50:50,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:50,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:50:50,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:50,481 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 13:50:50,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563302980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:50,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:50,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:50:50,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354615976] [2021-06-05 13:50:50,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:50:50,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:50,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:50:50,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:50:50,482 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 13:50:51,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:51,455 INFO L93 Difference]: Finished difference Result 35448 states and 108975 transitions. [2021-06-05 13:50:51,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 13:50:51,455 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 13:50:51,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:51,523 INFO L225 Difference]: With dead ends: 35448 [2021-06-05 13:50:51,523 INFO L226 Difference]: Without dead ends: 35439 [2021-06-05 13:50:51,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2569 ImplicationChecksByTransitivity, 766.1ms TimeCoverageRelationStatistics Valid=1836, Invalid=6174, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 13:50:51,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35439 states. [2021-06-05 13:50:51,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35439 to 27796. [2021-06-05 13:50:52,009 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 13:50:52,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27796 states to 27796 states and 87801 transitions. [2021-06-05 13:50:52,073 INFO L78 Accepts]: Start accepts. Automaton has 27796 states and 87801 transitions. Word has length 26 [2021-06-05 13:50:52,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:52,073 INFO L482 AbstractCegarLoop]: Abstraction has 27796 states and 87801 transitions. [2021-06-05 13:50:52,073 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 13:50:52,073 INFO L276 IsEmpty]: Start isEmpty. Operand 27796 states and 87801 transitions. [2021-06-05 13:50:52,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:50:52,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:52,111 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:52,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable958 [2021-06-05 13:50:52,312 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:52,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:52,312 INFO L82 PathProgramCache]: Analyzing trace with hash 2116179429, now seen corresponding path program 514 times [2021-06-05 13:50:52,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:52,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392793772] [2021-06-05 13:50:52,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:52,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:52,383 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 13:50:52,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:52,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392793772] [2021-06-05 13:50:52,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392793772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:52,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225577848] [2021-06-05 13:50:52,384 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 13:50:52,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:50:52,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:52,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:50:52,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:52,526 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 13:50:52,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225577848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:52,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:52,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:50:52,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287560601] [2021-06-05 13:50:52,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:50:52,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:52,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:50:52,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:50:52,526 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 13:50:53,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:53,397 INFO L93 Difference]: Finished difference Result 35824 states and 110259 transitions. [2021-06-05 13:50:53,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 13:50:53,400 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 13:50:53,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:53,476 INFO L225 Difference]: With dead ends: 35824 [2021-06-05 13:50:53,476 INFO L226 Difference]: Without dead ends: 35812 [2021-06-05 13:50:53,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2284 ImplicationChecksByTransitivity, 675.3ms TimeCoverageRelationStatistics Valid=1573, Invalid=5567, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 13:50:53,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35812 states. [2021-06-05 13:50:54,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35812 to 28033. [2021-06-05 13:50:54,045 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 13:50:54,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28033 states to 28033 states and 88615 transitions. [2021-06-05 13:50:54,115 INFO L78 Accepts]: Start accepts. Automaton has 28033 states and 88615 transitions. Word has length 26 [2021-06-05 13:50:54,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:54,115 INFO L482 AbstractCegarLoop]: Abstraction has 28033 states and 88615 transitions. [2021-06-05 13:50:54,115 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 13:50:54,115 INFO L276 IsEmpty]: Start isEmpty. Operand 28033 states and 88615 transitions. [2021-06-05 13:50:54,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:50:54,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:54,154 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:54,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable959,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:54,355 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:54,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:54,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1075943631, now seen corresponding path program 515 times [2021-06-05 13:50:54,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:54,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635190354] [2021-06-05 13:50:54,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:54,425 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 13:50:54,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:54,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635190354] [2021-06-05 13:50:54,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635190354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:54,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932980064] [2021-06-05 13:50:54,425 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 13:50:54,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:50:54,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:54,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:50:54,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:54,565 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 13:50:54,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932980064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:54,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:54,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:50:54,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034851490] [2021-06-05 13:50:54,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:50:54,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:54,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:50:54,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:50:54,566 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 13:50:55,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:55,380 INFO L93 Difference]: Finished difference Result 36830 states and 113799 transitions. [2021-06-05 13:50:55,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 13:50:55,380 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 13:50:55,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:55,449 INFO L225 Difference]: With dead ends: 36830 [2021-06-05 13:50:55,449 INFO L226 Difference]: Without dead ends: 36815 [2021-06-05 13:50:55,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2000 ImplicationChecksByTransitivity, 622.2ms TimeCoverageRelationStatistics Valid=1351, Invalid=4969, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 13:50:55,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36815 states. [2021-06-05 13:50:55,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36815 to 28168. [2021-06-05 13:50:55,966 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 13:50:56,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28168 states to 28168 states and 89060 transitions. [2021-06-05 13:50:56,024 INFO L78 Accepts]: Start accepts. Automaton has 28168 states and 89060 transitions. Word has length 26 [2021-06-05 13:50:56,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:56,024 INFO L482 AbstractCegarLoop]: Abstraction has 28168 states and 89060 transitions. [2021-06-05 13:50:56,024 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 13:50:56,024 INFO L276 IsEmpty]: Start isEmpty. Operand 28168 states and 89060 transitions. [2021-06-05 13:50:56,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:50:56,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:56,061 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:56,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable960 [2021-06-05 13:50:56,261 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:56,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:56,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1106595035, now seen corresponding path program 516 times [2021-06-05 13:50:56,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:56,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831780210] [2021-06-05 13:50:56,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:56,333 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 13:50:56,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:56,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831780210] [2021-06-05 13:50:56,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831780210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:56,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389060151] [2021-06-05 13:50:56,333 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 13:50:56,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:50:56,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:56,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:50:56,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:56,474 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 13:50:56,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389060151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:56,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:56,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:50:56,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449740196] [2021-06-05 13:50:56,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:50:56,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:56,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:50:56,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:50:56,475 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 13:50:57,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:57,204 INFO L93 Difference]: Finished difference Result 38080 states and 118134 transitions. [2021-06-05 13:50:57,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 13:50:57,204 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 13:50:57,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:57,275 INFO L225 Difference]: With dead ends: 38080 [2021-06-05 13:50:57,275 INFO L226 Difference]: Without dead ends: 38062 [2021-06-05 13:50:57,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1716 ImplicationChecksByTransitivity, 584.0ms TimeCoverageRelationStatistics Valid=1171, Invalid=4379, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 13:50:57,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38062 states. [2021-06-05 13:50:57,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38062 to 28241. [2021-06-05 13:50:57,948 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 13:50:58,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28241 states to 28241 states and 89277 transitions. [2021-06-05 13:50:58,019 INFO L78 Accepts]: Start accepts. Automaton has 28241 states and 89277 transitions. Word has length 26 [2021-06-05 13:50:58,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:58,019 INFO L482 AbstractCegarLoop]: Abstraction has 28241 states and 89277 transitions. [2021-06-05 13:50:58,019 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 13:50:58,019 INFO L276 IsEmpty]: Start isEmpty. Operand 28241 states and 89277 transitions. [2021-06-05 13:50:58,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:50:58,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:58,063 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:58,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable961 [2021-06-05 13:50:58,264 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:58,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:58,264 INFO L82 PathProgramCache]: Analyzing trace with hash -45816945, now seen corresponding path program 517 times [2021-06-05 13:50:58,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:58,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871233986] [2021-06-05 13:50:58,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:58,337 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 13:50:58,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:58,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871233986] [2021-06-05 13:50:58,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871233986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:58,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185195145] [2021-06-05 13:50:58,338 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 13:50:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:58,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:50:58,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:58,485 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 13:50:58,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185195145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:58,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:58,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:50:58,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143843310] [2021-06-05 13:50:58,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:50:58,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:58,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:50:58,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:50:58,486 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 13:50:59,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:59,172 INFO L93 Difference]: Finished difference Result 38378 states and 118948 transitions. [2021-06-05 13:50:59,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 13:50:59,172 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 13:50:59,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:59,242 INFO L225 Difference]: With dead ends: 38378 [2021-06-05 13:50:59,242 INFO L226 Difference]: Without dead ends: 38357 [2021-06-05 13:50:59,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 541.9ms TimeCoverageRelationStatistics Valid=1034, Invalid=3796, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 13:50:59,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38357 states. [2021-06-05 13:50:59,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38357 to 28289. [2021-06-05 13:50:59,768 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 13:50:59,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28289 states to 28289 states and 89393 transitions. [2021-06-05 13:50:59,835 INFO L78 Accepts]: Start accepts. Automaton has 28289 states and 89393 transitions. Word has length 26 [2021-06-05 13:50:59,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:59,835 INFO L482 AbstractCegarLoop]: Abstraction has 28289 states and 89393 transitions. [2021-06-05 13:50:59,835 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 13:50:59,835 INFO L276 IsEmpty]: Start isEmpty. Operand 28289 states and 89393 transitions. [2021-06-05 13:50:59,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:50:59,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:59,877 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:00,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable962 [2021-06-05 13:51:00,077 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:00,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:00,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1521434523, now seen corresponding path program 518 times [2021-06-05 13:51:00,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:00,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598621876] [2021-06-05 13:51:00,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:00,155 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 13:51:00,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:00,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598621876] [2021-06-05 13:51:00,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598621876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:00,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177619856] [2021-06-05 13:51:00,155 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 13:51:00,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:51:00,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:00,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:51:00,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:00,300 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 13:51:00,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177619856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:00,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:00,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:51:00,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728255493] [2021-06-05 13:51:00,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:51:00,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:00,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:51:00,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:51:00,301 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 13:51:00,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:00,786 INFO L93 Difference]: Finished difference Result 35202 states and 108627 transitions. [2021-06-05 13:51:00,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 13:51:00,786 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 13:51:00,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:00,852 INFO L225 Difference]: With dead ends: 35202 [2021-06-05 13:51:00,852 INFO L226 Difference]: Without dead ends: 35181 [2021-06-05 13:51:00,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 430.0ms TimeCoverageRelationStatistics Valid=776, Invalid=2646, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 13:51:00,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35181 states. [2021-06-05 13:51:01,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35181 to 28289. [2021-06-05 13:51:01,344 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 13:51:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28289 states to 28289 states and 89386 transitions. [2021-06-05 13:51:01,401 INFO L78 Accepts]: Start accepts. Automaton has 28289 states and 89386 transitions. Word has length 26 [2021-06-05 13:51:01,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:01,401 INFO L482 AbstractCegarLoop]: Abstraction has 28289 states and 89386 transitions. [2021-06-05 13:51:01,401 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 13:51:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 28289 states and 89386 transitions. [2021-06-05 13:51:01,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:51:01,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:01,441 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:01,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable963,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:01,642 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:01,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:01,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1586238833, now seen corresponding path program 519 times [2021-06-05 13:51:01,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:01,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773625151] [2021-06-05 13:51:01,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:01,709 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 13:51:01,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:01,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773625151] [2021-06-05 13:51:01,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773625151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:01,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390209837] [2021-06-05 13:51:01,709 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 13:51:01,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:51:01,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:01,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:51:01,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:01,889 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 13:51:01,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390209837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:01,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:01,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-06-05 13:51:01,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783360558] [2021-06-05 13:51:01,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:51:01,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:01,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:51:01,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:51:01,890 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 13:51:03,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:03,166 INFO L93 Difference]: Finished difference Result 31417 states and 97881 transitions. [2021-06-05 13:51:03,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 13:51:03,166 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 13:51:03,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:03,224 INFO L225 Difference]: With dead ends: 31417 [2021-06-05 13:51:03,225 INFO L226 Difference]: Without dead ends: 31402 [2021-06-05 13:51:03,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2609 ImplicationChecksByTransitivity, 977.9ms TimeCoverageRelationStatistics Valid=3387, Invalid=6315, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 13:51:03,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31402 states. [2021-06-05 13:51:03,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31402 to 29607. [2021-06-05 13:51:03,714 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 13:51:03,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29607 states to 29607 states and 93947 transitions. [2021-06-05 13:51:03,782 INFO L78 Accepts]: Start accepts. Automaton has 29607 states and 93947 transitions. Word has length 26 [2021-06-05 13:51:03,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:03,782 INFO L482 AbstractCegarLoop]: Abstraction has 29607 states and 93947 transitions. [2021-06-05 13:51:03,782 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 13:51:03,783 INFO L276 IsEmpty]: Start isEmpty. Operand 29607 states and 93947 transitions. [2021-06-05 13:51:03,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:51:03,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:03,822 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:04,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 523 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable964 [2021-06-05 13:51:04,022 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:04,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:04,023 INFO L82 PathProgramCache]: Analyzing trace with hash -2050829937, now seen corresponding path program 520 times [2021-06-05 13:51:04,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:04,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675015355] [2021-06-05 13:51:04,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:04,088 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 13:51:04,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:04,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675015355] [2021-06-05 13:51:04,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675015355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:04,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474401235] [2021-06-05 13:51:04,089 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 13:51:04,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:51:04,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:04,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:51:04,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:04,231 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 13:51:04,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474401235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:04,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:04,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-06-05 13:51:04,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884513440] [2021-06-05 13:51:04,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:51:04,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:04,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:51:04,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:51:04,232 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 13:51:05,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:05,573 INFO L93 Difference]: Finished difference Result 30731 states and 96043 transitions. [2021-06-05 13:51:05,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 13:51:05,573 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 26 [2021-06-05 13:51:05,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:05,632 INFO L225 Difference]: With dead ends: 30731 [2021-06-05 13:51:05,632 INFO L226 Difference]: Without dead ends: 30719 [2021-06-05 13:51:05,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3423 ImplicationChecksByTransitivity, 1089.5ms TimeCoverageRelationStatistics Valid=4100, Invalid=8332, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 13:51:05,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30719 states. [2021-06-05 13:51:06,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30719 to 27213. [2021-06-05 13:51:06,078 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 13:51:06,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27213 states to 27213 states and 85722 transitions. [2021-06-05 13:51:06,142 INFO L78 Accepts]: Start accepts. Automaton has 27213 states and 85722 transitions. Word has length 26 [2021-06-05 13:51:06,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:06,142 INFO L482 AbstractCegarLoop]: Abstraction has 27213 states and 85722 transitions. [2021-06-05 13:51:06,142 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 13:51:06,143 INFO L276 IsEmpty]: Start isEmpty. Operand 27213 states and 85722 transitions. [2021-06-05 13:51:06,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:51:06,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:06,180 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:06,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable965,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:06,381 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:06,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:06,381 INFO L82 PathProgramCache]: Analyzing trace with hash -2084429165, now seen corresponding path program 521 times [2021-06-05 13:51:06,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:06,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633457702] [2021-06-05 13:51:06,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:06,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:06,455 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 13:51:06,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:06,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633457702] [2021-06-05 13:51:06,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633457702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:06,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056951393] [2021-06-05 13:51:06,455 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 13:51:06,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:51:06,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:06,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:51:06,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:06,613 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 13:51:06,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056951393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:06,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:06,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2021-06-05 13:51:06,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580673472] [2021-06-05 13:51:06,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:51:06,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:06,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:51:06,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:51:06,614 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 13:51:07,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:07,924 INFO L93 Difference]: Finished difference Result 28228 states and 87728 transitions. [2021-06-05 13:51:07,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 13:51:07,924 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 13:51:07,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:07,972 INFO L225 Difference]: With dead ends: 28228 [2021-06-05 13:51:07,972 INFO L226 Difference]: Without dead ends: 28220 [2021-06-05 13:51:07,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3652 ImplicationChecksByTransitivity, 994.2ms TimeCoverageRelationStatistics Valid=4157, Invalid=8499, Unknown=0, NotChecked=0, Total=12656 [2021-06-05 13:51:07,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28220 states. [2021-06-05 13:51:08,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28220 to 27255. [2021-06-05 13:51:08,365 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 13:51:08,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27255 states to 27255 states and 85830 transitions. [2021-06-05 13:51:08,425 INFO L78 Accepts]: Start accepts. Automaton has 27255 states and 85830 transitions. Word has length 26 [2021-06-05 13:51:08,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:08,425 INFO L482 AbstractCegarLoop]: Abstraction has 27255 states and 85830 transitions. [2021-06-05 13:51:08,425 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 13:51:08,425 INFO L276 IsEmpty]: Start isEmpty. Operand 27255 states and 85830 transitions. [2021-06-05 13:51:08,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:51:08,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:08,465 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:08,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable966,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:08,666 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:08,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:08,666 INFO L82 PathProgramCache]: Analyzing trace with hash 2019073995, now seen corresponding path program 522 times [2021-06-05 13:51:08,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:08,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116221854] [2021-06-05 13:51:08,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:08,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:08,726 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 13:51:08,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:08,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116221854] [2021-06-05 13:51:08,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116221854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:08,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53508919] [2021-06-05 13:51:08,726 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 13:51:08,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 13:51:08,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:08,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:51:08,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:08,875 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 13:51:08,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53508919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:08,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:08,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-06-05 13:51:08,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223388302] [2021-06-05 13:51:08,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:51:08,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:08,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:51:08,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:51:08,875 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 13:51:10,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:10,074 INFO L93 Difference]: Finished difference Result 30687 states and 95027 transitions. [2021-06-05 13:51:10,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 13:51:10,074 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 13:51:10,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:10,118 INFO L225 Difference]: With dead ends: 30687 [2021-06-05 13:51:10,118 INFO L226 Difference]: Without dead ends: 30660 [2021-06-05 13:51:10,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2454 ImplicationChecksByTransitivity, 898.9ms TimeCoverageRelationStatistics Valid=3241, Invalid=6071, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 13:51:10,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30660 states. [2021-06-05 13:51:10,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30660 to 28569. [2021-06-05 13:51:10,570 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 13:51:10,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28569 states to 28569 states and 90371 transitions. [2021-06-05 13:51:10,640 INFO L78 Accepts]: Start accepts. Automaton has 28569 states and 90371 transitions. Word has length 26 [2021-06-05 13:51:10,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:10,641 INFO L482 AbstractCegarLoop]: Abstraction has 28569 states and 90371 transitions. [2021-06-05 13:51:10,641 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 13:51:10,641 INFO L276 IsEmpty]: Start isEmpty. Operand 28569 states and 90371 transitions. [2021-06-05 13:51:10,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:51:10,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:10,683 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:10,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable967 [2021-06-05 13:51:10,884 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:10,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:10,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1554482891, now seen corresponding path program 523 times [2021-06-05 13:51:10,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:10,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748186416] [2021-06-05 13:51:10,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:10,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:10,945 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 13:51:10,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:10,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748186416] [2021-06-05 13:51:10,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748186416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:10,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180419033] [2021-06-05 13:51:10,946 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 13:51:10,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:10,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:51:10,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:11,095 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 13:51:11,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180419033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:11,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:11,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-06-05 13:51:11,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212204489] [2021-06-05 13:51:11,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:51:11,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:11,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:51:11,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:51:11,096 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 13:51:12,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:12,527 INFO L93 Difference]: Finished difference Result 29868 states and 92929 transitions. [2021-06-05 13:51:12,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 13:51:12,527 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 13:51:12,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:12,582 INFO L225 Difference]: With dead ends: 29868 [2021-06-05 13:51:12,582 INFO L226 Difference]: Without dead ends: 29858 [2021-06-05 13:51:12,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3705 ImplicationChecksByTransitivity, 1182.4ms TimeCoverageRelationStatistics Valid=4143, Invalid=8967, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 13:51:12,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29858 states. [2021-06-05 13:51:12,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29858 to 26993. [2021-06-05 13:51:13,000 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 13:51:13,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26993 states to 26993 states and 84949 transitions. [2021-06-05 13:51:13,052 INFO L78 Accepts]: Start accepts. Automaton has 26993 states and 84949 transitions. Word has length 26 [2021-06-05 13:51:13,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:13,052 INFO L482 AbstractCegarLoop]: Abstraction has 26993 states and 84949 transitions. [2021-06-05 13:51:13,053 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 13:51:13,053 INFO L276 IsEmpty]: Start isEmpty. Operand 26993 states and 84949 transitions. [2021-06-05 13:51:13,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:51:13,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:13,088 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:13,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable968,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:13,288 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:13,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:13,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1520883663, now seen corresponding path program 524 times [2021-06-05 13:51:13,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:13,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557075209] [2021-06-05 13:51:13,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:13,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:13,354 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 13:51:13,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:13,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557075209] [2021-06-05 13:51:13,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557075209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:13,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850977683] [2021-06-05 13:51:13,354 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 13:51:13,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:51:13,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:13,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:51:13,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:13,513 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 13:51:13,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850977683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:13,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:13,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 26 [2021-06-05 13:51:13,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731184795] [2021-06-05 13:51:13,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:51:13,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:13,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:51:13,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:51:13,514 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 13:51:14,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:14,838 INFO L93 Difference]: Finished difference Result 28470 states and 88158 transitions. [2021-06-05 13:51:14,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 13:51:14,838 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 13:51:14,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:14,887 INFO L225 Difference]: With dead ends: 28470 [2021-06-05 13:51:14,888 INFO L226 Difference]: Without dead ends: 28450 [2021-06-05 13:51:14,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3782 ImplicationChecksByTransitivity, 1095.5ms TimeCoverageRelationStatistics Valid=4019, Invalid=8863, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 13:51:14,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28450 states. [2021-06-05 13:51:15,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28450 to 26539. [2021-06-05 13:51:15,306 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 13:51:15,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26539 states to 26539 states and 83487 transitions. [2021-06-05 13:51:15,368 INFO L78 Accepts]: Start accepts. Automaton has 26539 states and 83487 transitions. Word has length 26 [2021-06-05 13:51:15,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:15,368 INFO L482 AbstractCegarLoop]: Abstraction has 26539 states and 83487 transitions. [2021-06-05 13:51:15,368 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 13:51:15,368 INFO L276 IsEmpty]: Start isEmpty. Operand 26539 states and 83487 transitions. [2021-06-05 13:51:15,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:51:15,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:15,408 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:15,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable969 [2021-06-05 13:51:15,625 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:15,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:15,625 INFO L82 PathProgramCache]: Analyzing trace with hash 479307595, now seen corresponding path program 525 times [2021-06-05 13:51:15,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:15,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697428925] [2021-06-05 13:51:15,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:15,704 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 13:51:15,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:15,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697428925] [2021-06-05 13:51:15,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697428925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:15,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934280165] [2021-06-05 13:51:15,705 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 13:51:15,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 13:51:15,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:15,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:51:15,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:15,893 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 13:51:15,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934280165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:15,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:15,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2021-06-05 13:51:15,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769118320] [2021-06-05 13:51:15,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 13:51:15,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:15,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 13:51:15,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:51:15,897 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 13:51:17,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:17,132 INFO L93 Difference]: Finished difference Result 27713 states and 85920 transitions. [2021-06-05 13:51:17,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-05 13:51:17,133 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 13:51:17,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:17,189 INFO L225 Difference]: With dead ends: 27713 [2021-06-05 13:51:17,189 INFO L226 Difference]: Without dead ends: 27701 [2021-06-05 13:51:17,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3898 ImplicationChecksByTransitivity, 1042.7ms TimeCoverageRelationStatistics Valid=4022, Invalid=8860, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 13:51:17,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27701 states. [2021-06-05 13:51:17,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27701 to 26577. [2021-06-05 13:51:17,667 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 13:51:17,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26577 states to 26577 states and 83608 transitions. [2021-06-05 13:51:17,731 INFO L78 Accepts]: Start accepts. Automaton has 26577 states and 83608 transitions. Word has length 26 [2021-06-05 13:51:17,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:17,731 INFO L482 AbstractCegarLoop]: Abstraction has 26577 states and 83608 transitions. [2021-06-05 13:51:17,731 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 13:51:17,731 INFO L276 IsEmpty]: Start isEmpty. Operand 26577 states and 83608 transitions. [2021-06-05 13:51:17,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:51:17,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:17,771 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:17,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 529 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable970 [2021-06-05 13:51:17,985 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:17,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:17,985 INFO L82 PathProgramCache]: Analyzing trace with hash 2114621967, now seen corresponding path program 526 times [2021-06-05 13:51:17,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:17,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002563513] [2021-06-05 13:51:17,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:18,042 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 13:51:18,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:18,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002563513] [2021-06-05 13:51:18,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002563513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:18,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045272623] [2021-06-05 13:51:18,043 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 13:51:18,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:51:18,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:18,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:51:18,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:18,220 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 13:51:18,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045272623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:18,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:18,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 25 [2021-06-05 13:51:18,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874322628] [2021-06-05 13:51:18,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:51:18,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:18,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:51:18,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:51:18,224 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 13:51:19,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:19,527 INFO L93 Difference]: Finished difference Result 30369 states and 93818 transitions. [2021-06-05 13:51:19,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 13:51:19,527 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 13:51:19,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:19,584 INFO L225 Difference]: With dead ends: 30369 [2021-06-05 13:51:19,584 INFO L226 Difference]: Without dead ends: 30345 [2021-06-05 13:51:19,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2331 ImplicationChecksByTransitivity, 1029.8ms TimeCoverageRelationStatistics Valid=3114, Invalid=5816, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 13:51:19,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30345 states. [2021-06-05 13:51:20,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30345 to 27835. [2021-06-05 13:51:20,038 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 13:51:20,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27835 states to 27835 states and 87925 transitions. [2021-06-05 13:51:20,104 INFO L78 Accepts]: Start accepts. Automaton has 27835 states and 87925 transitions. Word has length 26 [2021-06-05 13:51:20,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:20,104 INFO L482 AbstractCegarLoop]: Abstraction has 27835 states and 87925 transitions. [2021-06-05 13:51:20,105 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 13:51:20,105 INFO L276 IsEmpty]: Start isEmpty. Operand 27835 states and 87925 transitions. [2021-06-05 13:51:20,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:51:20,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:20,142 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:20,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable971,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:20,343 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:20,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:20,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1650030863, now seen corresponding path program 527 times [2021-06-05 13:51:20,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:20,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662877564] [2021-06-05 13:51:20,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:20,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:20,398 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 13:51:20,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:20,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662877564] [2021-06-05 13:51:20,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662877564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:20,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925361049] [2021-06-05 13:51:20,399 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 13:51:20,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:51:20,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:20,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:51:20,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:20,557 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 13:51:20,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925361049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:20,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:20,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 25 [2021-06-05 13:51:20,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866452334] [2021-06-05 13:51:20,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:51:20,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:20,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:51:20,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:51:20,558 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 13:51:21,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:21,951 INFO L93 Difference]: Finished difference Result 29357 states and 91107 transitions. [2021-06-05 13:51:21,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-05 13:51:21,952 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 13:51:21,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:22,006 INFO L225 Difference]: With dead ends: 29357 [2021-06-05 13:51:22,007 INFO L226 Difference]: Without dead ends: 29349 [2021-06-05 13:51:22,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4263 ImplicationChecksByTransitivity, 1144.3ms TimeCoverageRelationStatistics Valid=4352, Invalid=9928, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 13:51:22,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29349 states. [2021-06-05 13:51:22,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29349 to 26847. [2021-06-05 13:51:22,509 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 13:51:22,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26847 states to 26847 states and 84546 transitions. [2021-06-05 13:51:22,573 INFO L78 Accepts]: Start accepts. Automaton has 26847 states and 84546 transitions. Word has length 26 [2021-06-05 13:51:22,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:22,573 INFO L482 AbstractCegarLoop]: Abstraction has 26847 states and 84546 transitions. [2021-06-05 13:51:22,573 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 13:51:22,573 INFO L276 IsEmpty]: Start isEmpty. Operand 26847 states and 84546 transitions. [2021-06-05 13:51:22,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:51:22,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:22,613 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:22,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable972 [2021-06-05 13:51:22,814 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:22,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:22,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1616431635, now seen corresponding path program 528 times [2021-06-05 13:51:22,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:22,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277929589] [2021-06-05 13:51:22,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:22,874 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 13:51:22,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:22,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277929589] [2021-06-05 13:51:22,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277929589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:22,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533030633] [2021-06-05 13:51:22,874 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 13:51:22,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:51:22,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:22,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:51:22,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:23,034 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 13:51:23,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533030633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:23,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:23,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 26 [2021-06-05 13:51:23,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259112774] [2021-06-05 13:51:23,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:51:23,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:23,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:51:23,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:51:23,035 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 13:51:24,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:24,378 INFO L93 Difference]: Finished difference Result 28643 states and 88679 transitions. [2021-06-05 13:51:24,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 13:51:24,378 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 13:51:24,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:24,428 INFO L225 Difference]: With dead ends: 28643 [2021-06-05 13:51:24,428 INFO L226 Difference]: Without dead ends: 28631 [2021-06-05 13:51:24,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4099 ImplicationChecksByTransitivity, 1117.6ms TimeCoverageRelationStatistics Valid=4043, Invalid=9529, Unknown=0, NotChecked=0, Total=13572 [2021-06-05 13:51:24,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28631 states. [2021-06-05 13:51:24,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28631 to 26673. [2021-06-05 13:51:24,872 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 13:51:24,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26673 states to 26673 states and 83981 transitions. [2021-06-05 13:51:24,933 INFO L78 Accepts]: Start accepts. Automaton has 26673 states and 83981 transitions. Word has length 26 [2021-06-05 13:51:24,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:24,933 INFO L482 AbstractCegarLoop]: Abstraction has 26673 states and 83981 transitions. [2021-06-05 13:51:24,933 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 13:51:24,933 INFO L276 IsEmpty]: Start isEmpty. Operand 26673 states and 83981 transitions. [2021-06-05 13:51:24,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:51:24,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:24,973 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:25,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable973,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:25,173 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:25,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:25,173 INFO L82 PathProgramCache]: Analyzing trace with hash 574855567, now seen corresponding path program 529 times [2021-06-05 13:51:25,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:25,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839839588] [2021-06-05 13:51:25,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:25,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:25,240 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 13:51:25,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:25,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839839588] [2021-06-05 13:51:25,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839839588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:25,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119548173] [2021-06-05 13:51:25,241 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 13:51:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:25,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:51:25,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:25,402 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 13:51:25,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119548173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:25,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:25,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 27 [2021-06-05 13:51:25,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348528633] [2021-06-05 13:51:25,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 13:51:25,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:25,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 13:51:25,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:51:25,402 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 13:51:26,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:26,728 INFO L93 Difference]: Finished difference Result 28561 states and 88437 transitions. [2021-06-05 13:51:26,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 13:51:26,729 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 13:51:26,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:26,782 INFO L225 Difference]: With dead ends: 28561 [2021-06-05 13:51:26,782 INFO L226 Difference]: Without dead ends: 28537 [2021-06-05 13:51:26,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4073 ImplicationChecksByTransitivity, 1097.9ms TimeCoverageRelationStatistics Valid=3869, Invalid=9241, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 13:51:26,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28537 states. [2021-06-05 13:51:27,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28537 to 26427. [2021-06-05 13:51:27,299 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 13:51:27,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26427 states to 26427 states and 83252 transitions. [2021-06-05 13:51:27,356 INFO L78 Accepts]: Start accepts. Automaton has 26427 states and 83252 transitions. Word has length 26 [2021-06-05 13:51:27,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:27,356 INFO L482 AbstractCegarLoop]: Abstraction has 26427 states and 83252 transitions. [2021-06-05 13:51:27,356 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 13:51:27,356 INFO L276 IsEmpty]: Start isEmpty. Operand 26427 states and 83252 transitions. [2021-06-05 13:51:27,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:51:27,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:27,389 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:27,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable974 [2021-06-05 13:51:27,590 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:27,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:27,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1649231469, now seen corresponding path program 530 times [2021-06-05 13:51:27,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:27,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330708350] [2021-06-05 13:51:27,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:27,663 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 13:51:27,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:27,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330708350] [2021-06-05 13:51:27,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330708350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:27,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045128746] [2021-06-05 13:51:27,663 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 13:51:27,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:51:27,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:27,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:51:27,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:27,829 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 13:51:27,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045128746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:27,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:27,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-06-05 13:51:27,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015660921] [2021-06-05 13:51:27,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:51:27,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:27,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:51:27,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:51:27,830 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 13:51:29,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:29,015 INFO L93 Difference]: Finished difference Result 27859 states and 86438 transitions. [2021-06-05 13:51:29,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 13:51:29,015 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 13:51:29,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:29,068 INFO L225 Difference]: With dead ends: 27859 [2021-06-05 13:51:29,068 INFO L226 Difference]: Without dead ends: 27843 [2021-06-05 13:51:29,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4034 ImplicationChecksByTransitivity, 1007.7ms TimeCoverageRelationStatistics Valid=3820, Invalid=9062, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 13:51:29,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27843 states. [2021-06-05 13:51:29,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27843 to 26477. [2021-06-05 13:51:29,506 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 13:51:29,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26477 states to 26477 states and 83422 transitions. [2021-06-05 13:51:29,572 INFO L78 Accepts]: Start accepts. Automaton has 26477 states and 83422 transitions. Word has length 26 [2021-06-05 13:51:29,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:29,573 INFO L482 AbstractCegarLoop]: Abstraction has 26477 states and 83422 transitions. [2021-06-05 13:51:29,573 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 13:51:29,573 INFO L276 IsEmpty]: Start isEmpty. Operand 26477 states and 83422 transitions. [2021-06-05 13:51:29,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:51:29,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:29,611 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:29,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable975,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:29,812 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:29,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:29,812 INFO L82 PathProgramCache]: Analyzing trace with hash 781641803, now seen corresponding path program 531 times [2021-06-05 13:51:29,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:29,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732099990] [2021-06-05 13:51:29,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:29,861 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 13:51:29,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:29,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732099990] [2021-06-05 13:51:29,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732099990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:29,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137534946] [2021-06-05 13:51:29,861 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 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 13:51:29,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:51:29,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:29,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:51:29,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:30,027 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 13:51:30,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137534946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:30,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:30,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 25 [2021-06-05 13:51:30,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050255987] [2021-06-05 13:51:30,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:51:30,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:30,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:51:30,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:51:30,028 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 13:51:31,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:31,141 INFO L93 Difference]: Finished difference Result 30895 states and 95482 transitions. [2021-06-05 13:51:31,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 13:51:31,141 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 13:51:31,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:31,197 INFO L225 Difference]: With dead ends: 30895 [2021-06-05 13:51:31,197 INFO L226 Difference]: Without dead ends: 30874 [2021-06-05 13:51:31,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2249 ImplicationChecksByTransitivity, 860.1ms TimeCoverageRelationStatistics Valid=2988, Invalid=5568, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 13:51:31,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30874 states. [2021-06-05 13:51:31,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30874 to 27557. [2021-06-05 13:51:31,775 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 13:51:31,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27557 states to 27557 states and 87081 transitions. [2021-06-05 13:51:31,838 INFO L78 Accepts]: Start accepts. Automaton has 27557 states and 87081 transitions. Word has length 26 [2021-06-05 13:51:31,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:31,838 INFO L482 AbstractCegarLoop]: Abstraction has 27557 states and 87081 transitions. [2021-06-05 13:51:31,838 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 13:51:31,838 INFO L276 IsEmpty]: Start isEmpty. Operand 27557 states and 87081 transitions. [2021-06-05 13:51:31,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:51:31,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:31,878 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:32,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable976 [2021-06-05 13:51:32,078 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:32,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:32,078 INFO L82 PathProgramCache]: Analyzing trace with hash 317050699, now seen corresponding path program 532 times [2021-06-05 13:51:32,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:32,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684392875] [2021-06-05 13:51:32,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:32,127 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 13:51:32,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:32,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684392875] [2021-06-05 13:51:32,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684392875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:32,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228398545] [2021-06-05 13:51:32,128 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 13:51:32,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:51:32,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:32,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:51:32,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:32,286 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 13:51:32,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228398545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:32,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:32,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 25 [2021-06-05 13:51:32,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534216798] [2021-06-05 13:51:32,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:51:32,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:32,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:51:32,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:51:32,287 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 13:51:33,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:33,808 INFO L93 Difference]: Finished difference Result 29430 states and 91212 transitions. [2021-06-05 13:51:33,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 13:51:33,808 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 13:51:33,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:33,858 INFO L225 Difference]: With dead ends: 29430 [2021-06-05 13:51:33,858 INFO L226 Difference]: Without dead ends: 29424 [2021-06-05 13:51:33,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5160 ImplicationChecksByTransitivity, 1247.1ms TimeCoverageRelationStatistics Valid=4713, Invalid=11289, Unknown=0, NotChecked=0, Total=16002 [2021-06-05 13:51:33,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29424 states. [2021-06-05 13:51:34,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29424 to 27158. [2021-06-05 13:51:34,326 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 13:51:34,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27158 states to 27158 states and 85712 transitions. [2021-06-05 13:51:34,390 INFO L78 Accepts]: Start accepts. Automaton has 27158 states and 85712 transitions. Word has length 26 [2021-06-05 13:51:34,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:34,391 INFO L482 AbstractCegarLoop]: Abstraction has 27158 states and 85712 transitions. [2021-06-05 13:51:34,391 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 13:51:34,391 INFO L276 IsEmpty]: Start isEmpty. Operand 27158 states and 85712 transitions. [2021-06-05 13:51:34,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:51:34,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:34,429 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:34,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable977 [2021-06-05 13:51:34,629 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:34,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:34,629 INFO L82 PathProgramCache]: Analyzing trace with hash 283451471, now seen corresponding path program 533 times [2021-06-05 13:51:34,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:34,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547301468] [2021-06-05 13:51:34,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:34,687 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 13:51:34,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:34,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547301468] [2021-06-05 13:51:34,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547301468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:34,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571230307] [2021-06-05 13:51:34,688 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 13:51:34,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:51:34,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:34,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:51:34,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:34,851 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 13:51:34,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571230307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:34,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:34,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2021-06-05 13:51:34,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080539735] [2021-06-05 13:51:34,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:51:34,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:34,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:51:34,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:51:34,852 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 13:51:36,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:36,318 INFO L93 Difference]: Finished difference Result 29381 states and 91072 transitions. [2021-06-05 13:51:36,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-05 13:51:36,318 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 13:51:36,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:36,372 INFO L225 Difference]: With dead ends: 29381 [2021-06-05 13:51:36,372 INFO L226 Difference]: Without dead ends: 29371 [2021-06-05 13:51:36,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4715 ImplicationChecksByTransitivity, 1182.5ms TimeCoverageRelationStatistics Valid=4224, Invalid=10538, Unknown=0, NotChecked=0, Total=14762 [2021-06-05 13:51:36,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29371 states. [2021-06-05 13:51:36,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29371 to 27039. [2021-06-05 13:51:36,910 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 13:51:36,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27039 states to 27039 states and 85322 transitions. [2021-06-05 13:51:36,980 INFO L78 Accepts]: Start accepts. Automaton has 27039 states and 85322 transitions. Word has length 26 [2021-06-05 13:51:36,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:36,980 INFO L482 AbstractCegarLoop]: Abstraction has 27039 states and 85322 transitions. [2021-06-05 13:51:36,980 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 13:51:36,980 INFO L276 IsEmpty]: Start isEmpty. Operand 27039 states and 85322 transitions. [2021-06-05 13:51:37,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:51:37,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:37,018 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:37,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable978,537 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:37,218 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:37,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:37,218 INFO L82 PathProgramCache]: Analyzing trace with hash -758124597, now seen corresponding path program 534 times [2021-06-05 13:51:37,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:37,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619681866] [2021-06-05 13:51:37,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:37,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:37,279 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 13:51:37,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:37,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619681866] [2021-06-05 13:51:37,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619681866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:37,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530638484] [2021-06-05 13:51:37,279 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 13:51:37,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:51:37,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:37,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:51:37,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:37,448 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 13:51:37,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530638484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:37,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:37,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-06-05 13:51:37,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298286952] [2021-06-05 13:51:37,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 13:51:37,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:37,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 13:51:37,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:51:37,449 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 13:51:38,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:38,831 INFO L93 Difference]: Finished difference Result 29421 states and 91215 transitions. [2021-06-05 13:51:38,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 13:51:38,831 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 13:51:38,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:38,886 INFO L225 Difference]: With dead ends: 29421 [2021-06-05 13:51:38,886 INFO L226 Difference]: Without dead ends: 29407 [2021-06-05 13:51:38,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4430 ImplicationChecksByTransitivity, 1126.4ms TimeCoverageRelationStatistics Valid=3872, Invalid=9934, Unknown=0, NotChecked=0, Total=13806 [2021-06-05 13:51:38,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29407 states. [2021-06-05 13:51:39,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29407 to 27188. [2021-06-05 13:51:39,336 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 13:51:39,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27188 states to 27188 states and 85830 transitions. [2021-06-05 13:51:39,398 INFO L78 Accepts]: Start accepts. Automaton has 27188 states and 85830 transitions. Word has length 26 [2021-06-05 13:51:39,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:39,398 INFO L482 AbstractCegarLoop]: Abstraction has 27188 states and 85830 transitions. [2021-06-05 13:51:39,398 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 13:51:39,398 INFO L276 IsEmpty]: Start isEmpty. Operand 27188 states and 85830 transitions. [2021-06-05 13:51:39,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:51:39,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:39,438 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:39,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable979 [2021-06-05 13:51:39,639 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:39,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:39,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1312755663, now seen corresponding path program 535 times [2021-06-05 13:51:39,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:39,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780544827] [2021-06-05 13:51:39,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:39,705 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 13:51:39,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:39,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780544827] [2021-06-05 13:51:39,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780544827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:39,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015485263] [2021-06-05 13:51:39,706 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 13:51:39,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:39,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:51:39,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:39,882 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 13:51:39,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015485263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:39,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:39,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-06-05 13:51:39,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137245464] [2021-06-05 13:51:39,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:51:39,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:39,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:51:39,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:51:39,883 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 13:51:41,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:41,192 INFO L93 Difference]: Finished difference Result 29725 states and 92236 transitions. [2021-06-05 13:51:41,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-05 13:51:41,193 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 13:51:41,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:41,248 INFO L225 Difference]: With dead ends: 29725 [2021-06-05 13:51:41,248 INFO L226 Difference]: Without dead ends: 29701 [2021-06-05 13:51:41,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4264 ImplicationChecksByTransitivity, 1106.2ms TimeCoverageRelationStatistics Valid=3652, Invalid=9458, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 13:51:41,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29701 states. [2021-06-05 13:51:41,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29701 to 27357. [2021-06-05 13:51:41,745 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 13:51:41,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27357 states to 27357 states and 86474 transitions. [2021-06-05 13:51:41,808 INFO L78 Accepts]: Start accepts. Automaton has 27357 states and 86474 transitions. Word has length 26 [2021-06-05 13:51:41,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:41,808 INFO L482 AbstractCegarLoop]: Abstraction has 27357 states and 86474 transitions. [2021-06-05 13:51:41,808 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 13:51:41,808 INFO L276 IsEmpty]: Start isEmpty. Operand 27357 states and 86474 transitions. [2021-06-05 13:51:41,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:51:41,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:41,849 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:42,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 539 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable980 [2021-06-05 13:51:42,050 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:42,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:42,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1085534283, now seen corresponding path program 536 times [2021-06-05 13:51:42,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:42,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066658467] [2021-06-05 13:51:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:42,124 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 13:51:42,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:42,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066658467] [2021-06-05 13:51:42,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066658467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:42,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894168989] [2021-06-05 13:51:42,124 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 13:51:42,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:51:42,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:42,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:51:42,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:42,301 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 13:51:42,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894168989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:42,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:42,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-06-05 13:51:42,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701561941] [2021-06-05 13:51:42,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 13:51:42,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:42,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 13:51:42,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:51:42,302 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 13:51:43,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:43,397 INFO L93 Difference]: Finished difference Result 29174 states and 90761 transitions. [2021-06-05 13:51:43,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 13:51:43,397 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 13:51:43,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:43,452 INFO L225 Difference]: With dead ends: 29174 [2021-06-05 13:51:43,453 INFO L226 Difference]: Without dead ends: 29154 [2021-06-05 13:51:43,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4062 ImplicationChecksByTransitivity, 956.1ms TimeCoverageRelationStatistics Valid=3559, Invalid=9097, Unknown=0, NotChecked=0, Total=12656 [2021-06-05 13:51:43,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29154 states. [2021-06-05 13:51:43,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29154 to 27401. [2021-06-05 13:51:43,902 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 13:51:43,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27401 states to 27401 states and 86625 transitions. [2021-06-05 13:51:43,956 INFO L78 Accepts]: Start accepts. Automaton has 27401 states and 86625 transitions. Word has length 26 [2021-06-05 13:51:43,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:43,956 INFO L482 AbstractCegarLoop]: Abstraction has 27401 states and 86625 transitions. [2021-06-05 13:51:43,956 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 13:51:43,957 INFO L276 IsEmpty]: Start isEmpty. Operand 27401 states and 86625 transitions. [2021-06-05 13:51:43,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:51:43,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:43,993 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:44,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable981,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:44,193 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:44,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:44,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1886037617, now seen corresponding path program 537 times [2021-06-05 13:51:44,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:44,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041412372] [2021-06-05 13:51:44,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:44,237 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 13:51:44,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:44,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041412372] [2021-06-05 13:51:44,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041412372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:44,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64920286] [2021-06-05 13:51:44,237 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 13:51:44,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:51:44,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:44,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:51:44,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:44,399 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 13:51:44,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64920286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:44,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:44,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 25 [2021-06-05 13:51:44,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715666401] [2021-06-05 13:51:44,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:51:44,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:44,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:51:44,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:51:44,400 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 13:51:45,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:45,543 INFO L93 Difference]: Finished difference Result 33346 states and 103495 transitions. [2021-06-05 13:51:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 13:51:45,543 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 13:51:45,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:45,609 INFO L225 Difference]: With dead ends: 33346 [2021-06-05 13:51:45,609 INFO L226 Difference]: Without dead ends: 33328 [2021-06-05 13:51:45,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2219 ImplicationChecksByTransitivity, 872.1ms TimeCoverageRelationStatistics Valid=2839, Invalid=5351, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 13:51:45,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33328 states. [2021-06-05 13:51:46,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33328 to 30042. [2021-06-05 13:51:46,145 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 13:51:46,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30042 states to 30042 states and 95572 transitions. [2021-06-05 13:51:46,386 INFO L78 Accepts]: Start accepts. Automaton has 30042 states and 95572 transitions. Word has length 26 [2021-06-05 13:51:46,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:46,386 INFO L482 AbstractCegarLoop]: Abstraction has 30042 states and 95572 transitions. [2021-06-05 13:51:46,386 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 13:51:46,386 INFO L276 IsEmpty]: Start isEmpty. Operand 30042 states and 95572 transitions. [2021-06-05 13:51:46,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:51:46,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:46,428 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:46,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable982 [2021-06-05 13:51:46,628 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:46,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:46,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1944338575, now seen corresponding path program 538 times [2021-06-05 13:51:46,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:46,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019242286] [2021-06-05 13:51:46,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:46,674 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 13:51:46,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:46,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019242286] [2021-06-05 13:51:46,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019242286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:46,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094329102] [2021-06-05 13:51:46,674 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 13:51:46,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:51:46,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:46,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:51:46,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:46,860 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 13:51:46,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094329102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:46,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:46,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 25 [2021-06-05 13:51:46,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885076935] [2021-06-05 13:51:46,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:51:46,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:46,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:51:46,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:51:46,861 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 13:51:48,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:48,743 INFO L93 Difference]: Finished difference Result 32560 states and 101433 transitions. [2021-06-05 13:51:48,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-06-05 13:51:48,743 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 13:51:48,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:48,804 INFO L225 Difference]: With dead ends: 32560 [2021-06-05 13:51:48,804 INFO L226 Difference]: Without dead ends: 32554 [2021-06-05 13:51:48,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6452 ImplicationChecksByTransitivity, 1553.7ms TimeCoverageRelationStatistics Valid=5189, Invalid=13171, Unknown=0, NotChecked=0, Total=18360 [2021-06-05 13:51:48,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32554 states. [2021-06-05 13:51:49,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32554 to 29608. [2021-06-05 13:51:49,346 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 13:51:49,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29608 states to 29608 states and 94090 transitions. [2021-06-05 13:51:49,420 INFO L78 Accepts]: Start accepts. Automaton has 29608 states and 94090 transitions. Word has length 26 [2021-06-05 13:51:49,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:49,420 INFO L482 AbstractCegarLoop]: Abstraction has 29608 states and 94090 transitions. [2021-06-05 13:51:49,420 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 13:51:49,420 INFO L276 IsEmpty]: Start isEmpty. Operand 29608 states and 94090 transitions. [2021-06-05 13:51:49,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:51:49,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:49,467 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:49,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 542 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable983 [2021-06-05 13:51:49,683 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:49,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:49,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1910739347, now seen corresponding path program 539 times [2021-06-05 13:51:49,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:49,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872316289] [2021-06-05 13:51:49,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:49,734 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 13:51:49,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:49,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872316289] [2021-06-05 13:51:49,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872316289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:49,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022066927] [2021-06-05 13:51:49,734 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 13:51:49,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:51:49,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:49,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:51:49,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:49,931 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 13:51:49,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022066927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:49,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:49,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 26 [2021-06-05 13:51:49,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122664255] [2021-06-05 13:51:49,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:51:49,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:49,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:51:49,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:51:49,932 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 13:51:51,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:51,469 INFO L93 Difference]: Finished difference Result 32780 states and 102273 transitions. [2021-06-05 13:51:51,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 13:51:51,469 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 13:51:51,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:51,527 INFO L225 Difference]: With dead ends: 32780 [2021-06-05 13:51:51,527 INFO L226 Difference]: Without dead ends: 32772 [2021-06-05 13:51:51,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5696 ImplicationChecksByTransitivity, 1310.1ms TimeCoverageRelationStatistics Valid=4538, Invalid=11974, Unknown=0, NotChecked=0, Total=16512 [2021-06-05 13:51:51,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32772 states. [2021-06-05 13:51:52,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32772 to 29830. [2021-06-05 13:51:52,093 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 13:51:52,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29830 states to 29830 states and 94848 transitions. [2021-06-05 13:51:52,166 INFO L78 Accepts]: Start accepts. Automaton has 29830 states and 94848 transitions. Word has length 26 [2021-06-05 13:51:52,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:52,166 INFO L482 AbstractCegarLoop]: Abstraction has 29830 states and 94848 transitions. [2021-06-05 13:51:52,166 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 13:51:52,166 INFO L276 IsEmpty]: Start isEmpty. Operand 29830 states and 94848 transitions. [2021-06-05 13:51:52,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:51:52,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:52,210 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:52,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable984 [2021-06-05 13:51:52,410 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:52,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:52,411 INFO L82 PathProgramCache]: Analyzing trace with hash 869163279, now seen corresponding path program 540 times [2021-06-05 13:51:52,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:52,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678463828] [2021-06-05 13:51:52,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:52,475 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 13:51:52,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:52,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678463828] [2021-06-05 13:51:52,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678463828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:52,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764624879] [2021-06-05 13:51:52,475 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 13:51:52,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:51:52,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:52,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:51:52,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:52,642 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 13:51:52,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764624879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:52,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:52,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-06-05 13:51:52,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210832984] [2021-06-05 13:51:52,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 13:51:52,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:52,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 13:51:52,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:51:52,643 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 13:51:54,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:54,065 INFO L93 Difference]: Finished difference Result 33134 states and 103498 transitions. [2021-06-05 13:51:54,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-06-05 13:51:54,065 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 13:51:54,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:54,125 INFO L225 Difference]: With dead ends: 33134 [2021-06-05 13:51:54,126 INFO L226 Difference]: Without dead ends: 33122 [2021-06-05 13:51:54,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5101 ImplicationChecksByTransitivity, 1197.4ms TimeCoverageRelationStatistics Valid=4017, Invalid=10989, Unknown=0, NotChecked=0, Total=15006 [2021-06-05 13:51:54,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33122 states. [2021-06-05 13:51:54,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33122 to 30107. [2021-06-05 13:51:54,649 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 13:51:54,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30107 states to 30107 states and 95773 transitions. [2021-06-05 13:51:54,726 INFO L78 Accepts]: Start accepts. Automaton has 30107 states and 95773 transitions. Word has length 26 [2021-06-05 13:51:54,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:54,726 INFO L482 AbstractCegarLoop]: Abstraction has 30107 states and 95773 transitions. [2021-06-05 13:51:54,726 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 13:51:54,726 INFO L276 IsEmpty]: Start isEmpty. Operand 30107 states and 95773 transitions. [2021-06-05 13:51:54,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:51:54,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:54,773 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:54,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable985,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:54,989 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:54,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:54,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1354923757, now seen corresponding path program 541 times [2021-06-05 13:51:54,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:54,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107278133] [2021-06-05 13:51:54,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:55,054 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 13:51:55,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:55,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107278133] [2021-06-05 13:51:55,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107278133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:55,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087999866] [2021-06-05 13:51:55,055 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 13:51:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:55,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:51:55,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:55,263 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 13:51:55,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087999866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:55,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:55,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-06-05 13:51:55,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362413426] [2021-06-05 13:51:55,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:51:55,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:55,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:51:55,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:51:55,264 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 13:51:56,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:56,785 INFO L93 Difference]: Finished difference Result 33604 states and 105046 transitions. [2021-06-05 13:51:56,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 13:51:56,786 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 13:51:56,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:56,842 INFO L225 Difference]: With dead ends: 33604 [2021-06-05 13:51:56,843 INFO L226 Difference]: Without dead ends: 33588 [2021-06-05 13:51:56,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4648 ImplicationChecksByTransitivity, 1302.7ms TimeCoverageRelationStatistics Valid=3628, Invalid=10178, Unknown=0, NotChecked=0, Total=13806 [2021-06-05 13:51:57,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33588 states. [2021-06-05 13:51:57,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33588 to 30921. [2021-06-05 13:51:57,531 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 13:51:57,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30921 states to 30921 states and 98462 transitions. [2021-06-05 13:51:57,610 INFO L78 Accepts]: Start accepts. Automaton has 30921 states and 98462 transitions. Word has length 26 [2021-06-05 13:51:57,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:57,610 INFO L482 AbstractCegarLoop]: Abstraction has 30921 states and 98462 transitions. [2021-06-05 13:51:57,610 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 13:51:57,610 INFO L276 IsEmpty]: Start isEmpty. Operand 30921 states and 98462 transitions. [2021-06-05 13:51:57,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:51:57,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:57,657 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:57,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable986 [2021-06-05 13:51:57,873 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:57,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:57,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1582145137, now seen corresponding path program 542 times [2021-06-05 13:51:57,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:57,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095922680] [2021-06-05 13:51:57,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:57,952 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 13:51:57,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:57,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095922680] [2021-06-05 13:51:57,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095922680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:57,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342558360] [2021-06-05 13:51:57,952 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 13:51:57,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:51:57,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:57,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:51:57,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:58,162 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 13:51:58,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342558360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:58,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:58,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-06-05 13:51:58,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850292876] [2021-06-05 13:51:58,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 13:51:58,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:58,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 13:51:58,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:51:58,163 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 13:51:59,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:59,530 INFO L93 Difference]: Finished difference Result 34622 states and 108395 transitions. [2021-06-05 13:51:59,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 13:51:59,530 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 13:51:59,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:59,594 INFO L225 Difference]: With dead ends: 34622 [2021-06-05 13:51:59,594 INFO L226 Difference]: Without dead ends: 34602 [2021-06-05 13:51:59,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4330 ImplicationChecksByTransitivity, 1148.1ms TimeCoverageRelationStatistics Valid=3372, Invalid=9510, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 13:51:59,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34602 states. [2021-06-05 13:52:00,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34602 to 31830. [2021-06-05 13:52:00,067 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 13:52:00,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31830 states to 31830 states and 101500 transitions. [2021-06-05 13:52:00,135 INFO L78 Accepts]: Start accepts. Automaton has 31830 states and 101500 transitions. Word has length 26 [2021-06-05 13:52:00,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:00,135 INFO L482 AbstractCegarLoop]: Abstraction has 31830 states and 101500 transitions. [2021-06-05 13:52:00,136 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 13:52:00,136 INFO L276 IsEmpty]: Start isEmpty. Operand 31830 states and 101500 transitions. [2021-06-05 13:52:00,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:52:00,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:00,181 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:00,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 546 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable987 [2021-06-05 13:52:00,382 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:00,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:00,382 INFO L82 PathProgramCache]: Analyzing trace with hash -36073325, now seen corresponding path program 543 times [2021-06-05 13:52:00,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:00,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877968642] [2021-06-05 13:52:00,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:00,459 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 13:52:00,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:00,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877968642] [2021-06-05 13:52:00,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877968642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:00,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134060753] [2021-06-05 13:52:00,459 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 13:52:00,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:52:00,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:00,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:52:00,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:00,646 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 13:52:00,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134060753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:00,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:00,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-06-05 13:52:00,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540101602] [2021-06-05 13:52:00,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 13:52:00,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:00,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 13:52:00,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:52:00,646 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 13:52:01,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:01,797 INFO L93 Difference]: Finished difference Result 34324 states and 107694 transitions. [2021-06-05 13:52:01,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 13:52:01,798 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 13:52:01,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:01,858 INFO L225 Difference]: With dead ends: 34324 [2021-06-05 13:52:01,858 INFO L226 Difference]: Without dead ends: 34300 [2021-06-05 13:52:01,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3943 ImplicationChecksByTransitivity, 1021.6ms TimeCoverageRelationStatistics Valid=3249, Invalid=8961, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 13:52:01,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34300 states. [2021-06-05 13:52:02,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34300 to 31889. [2021-06-05 13:52:02,361 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 13:52:02,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31889 states to 31889 states and 101685 transitions. [2021-06-05 13:52:02,437 INFO L78 Accepts]: Start accepts. Automaton has 31889 states and 101685 transitions. Word has length 26 [2021-06-05 13:52:02,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:02,437 INFO L482 AbstractCegarLoop]: Abstraction has 31889 states and 101685 transitions. [2021-06-05 13:52:02,437 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 13:52:02,437 INFO L276 IsEmpty]: Start isEmpty. Operand 31889 states and 101685 transitions. [2021-06-05 13:52:02,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:52:02,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:02,481 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:02,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable988,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:02,681 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:02,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:02,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1315246283, now seen corresponding path program 544 times [2021-06-05 13:52:02,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:02,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747518305] [2021-06-05 13:52:02,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:02,721 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 13:52:02,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:02,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747518305] [2021-06-05 13:52:02,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747518305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:02,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606545177] [2021-06-05 13:52:02,721 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 13:52:02,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:52:02,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:02,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:52:02,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:02,883 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 13:52:02,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606545177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:02,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:02,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 25 [2021-06-05 13:52:02,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653923756] [2021-06-05 13:52:02,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:52:02,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:02,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:52:02,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:52:02,884 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 13:52:04,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:04,109 INFO L93 Difference]: Finished difference Result 42994 states and 135578 transitions. [2021-06-05 13:52:04,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 13:52:04,109 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 13:52:04,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:04,186 INFO L225 Difference]: With dead ends: 42994 [2021-06-05 13:52:04,186 INFO L226 Difference]: Without dead ends: 42979 [2021-06-05 13:52:04,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2845 ImplicationChecksByTransitivity, 824.6ms TimeCoverageRelationStatistics Valid=2766, Invalid=5424, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 13:52:04,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42979 states. [2021-06-05 13:52:04,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42979 to 37887. [2021-06-05 13:52:04,842 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 13:52:04,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37887 states to 37887 states and 122246 transitions. [2021-06-05 13:52:04,934 INFO L78 Accepts]: Start accepts. Automaton has 37887 states and 122246 transitions. Word has length 26 [2021-06-05 13:52:04,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:04,934 INFO L482 AbstractCegarLoop]: Abstraction has 37887 states and 122246 transitions. [2021-06-05 13:52:04,934 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 13:52:04,935 INFO L276 IsEmpty]: Start isEmpty. Operand 37887 states and 122246 transitions. [2021-06-05 13:52:04,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:52:04,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:04,987 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:05,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable989 [2021-06-05 13:52:05,187 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:05,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:05,187 INFO L82 PathProgramCache]: Analyzing trace with hash 850655179, now seen corresponding path program 545 times [2021-06-05 13:52:05,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:05,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072941707] [2021-06-05 13:52:05,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:05,227 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 13:52:05,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:05,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072941707] [2021-06-05 13:52:05,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072941707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:05,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165325772] [2021-06-05 13:52:05,227 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 13:52:05,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:52:05,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:05,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:52:05,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:05,395 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 13:52:05,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165325772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:05,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:05,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 25 [2021-06-05 13:52:05,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004583506] [2021-06-05 13:52:05,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:52:05,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:05,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:52:05,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:52:05,395 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 13:52:07,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:07,280 INFO L93 Difference]: Finished difference Result 41043 states and 129835 transitions. [2021-06-05 13:52:07,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-06-05 13:52:07,280 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 13:52:07,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:07,362 INFO L225 Difference]: With dead ends: 41043 [2021-06-05 13:52:07,363 INFO L226 Difference]: Without dead ends: 41039 [2021-06-05 13:52:07,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9041 ImplicationChecksByTransitivity, 1538.6ms TimeCoverageRelationStatistics Valid=5710, Invalid=15752, Unknown=0, NotChecked=0, Total=21462 [2021-06-05 13:52:07,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41039 states. [2021-06-05 13:52:08,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41039 to 37190. [2021-06-05 13:52:08,117 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 13:52:08,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37190 states to 37190 states and 119826 transitions. [2021-06-05 13:52:08,210 INFO L78 Accepts]: Start accepts. Automaton has 37190 states and 119826 transitions. Word has length 26 [2021-06-05 13:52:08,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:08,210 INFO L482 AbstractCegarLoop]: Abstraction has 37190 states and 119826 transitions. [2021-06-05 13:52:08,210 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 13:52:08,211 INFO L276 IsEmpty]: Start isEmpty. Operand 37190 states and 119826 transitions. [2021-06-05 13:52:08,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:52:08,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:08,264 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:08,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable990,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:08,465 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:08,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:08,465 INFO L82 PathProgramCache]: Analyzing trace with hash 817055951, now seen corresponding path program 546 times [2021-06-05 13:52:08,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:08,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555868784] [2021-06-05 13:52:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:08,509 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 13:52:08,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:08,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555868784] [2021-06-05 13:52:08,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555868784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:08,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749309941] [2021-06-05 13:52:08,509 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 13:52:08,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:52:08,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:08,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:52:08,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:08,673 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 13:52:08,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749309941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:08,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:08,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 26 [2021-06-05 13:52:08,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689886159] [2021-06-05 13:52:08,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:52:08,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:08,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:52:08,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:52:08,674 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 13:52:10,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:10,372 INFO L93 Difference]: Finished difference Result 41476 states and 131495 transitions. [2021-06-05 13:52:10,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-06-05 13:52:10,373 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 13:52:10,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:10,454 INFO L225 Difference]: With dead ends: 41476 [2021-06-05 13:52:10,454 INFO L226 Difference]: Without dead ends: 41468 [2021-06-05 13:52:10,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7764 ImplicationChecksByTransitivity, 1391.2ms TimeCoverageRelationStatistics Valid=4932, Invalid=13974, Unknown=0, NotChecked=0, Total=18906 [2021-06-05 13:52:10,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41468 states. [2021-06-05 13:52:11,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41468 to 37586. [2021-06-05 13:52:11,174 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 13:52:11,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37586 states to 37586 states and 121251 transitions. [2021-06-05 13:52:11,263 INFO L78 Accepts]: Start accepts. Automaton has 37586 states and 121251 transitions. Word has length 26 [2021-06-05 13:52:11,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:11,263 INFO L482 AbstractCegarLoop]: Abstraction has 37586 states and 121251 transitions. [2021-06-05 13:52:11,263 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 13:52:11,263 INFO L276 IsEmpty]: Start isEmpty. Operand 37586 states and 121251 transitions. [2021-06-05 13:52:11,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:52:11,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:11,311 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:11,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable991 [2021-06-05 13:52:11,511 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:11,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:11,512 INFO L82 PathProgramCache]: Analyzing trace with hash -224520117, now seen corresponding path program 547 times [2021-06-05 13:52:11,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:11,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990501725] [2021-06-05 13:52:11,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:11,561 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 13:52:11,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:11,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990501725] [2021-06-05 13:52:11,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990501725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:11,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158543744] [2021-06-05 13:52:11,562 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 13:52:11,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:11,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:52:11,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:11,735 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 13:52:11,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158543744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:11,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:11,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 27 [2021-06-05 13:52:11,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934211642] [2021-06-05 13:52:11,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 13:52:11,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:11,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 13:52:11,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:52:11,736 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 13:52:13,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:13,470 INFO L93 Difference]: Finished difference Result 42209 states and 134096 transitions. [2021-06-05 13:52:13,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-06-05 13:52:13,471 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 13:52:13,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:13,551 INFO L225 Difference]: With dead ends: 42209 [2021-06-05 13:52:13,552 INFO L226 Difference]: Without dead ends: 42197 [2021-06-05 13:52:13,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6687 ImplicationChecksByTransitivity, 1435.4ms TimeCoverageRelationStatistics Valid=4267, Invalid=12503, Unknown=0, NotChecked=0, Total=16770 [2021-06-05 13:52:13,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42197 states. [2021-06-05 13:52:14,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42197 to 38325. [2021-06-05 13:52:14,309 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 13:52:14,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38325 states to 38325 states and 123777 transitions. [2021-06-05 13:52:14,405 INFO L78 Accepts]: Start accepts. Automaton has 38325 states and 123777 transitions. Word has length 26 [2021-06-05 13:52:14,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:14,405 INFO L482 AbstractCegarLoop]: Abstraction has 38325 states and 123777 transitions. [2021-06-05 13:52:14,405 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 13:52:14,405 INFO L276 IsEmpty]: Start isEmpty. Operand 38325 states and 123777 transitions. [2021-06-05 13:52:14,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:52:14,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:14,459 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:14,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 551 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable992 [2021-06-05 13:52:14,660 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:14,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:14,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1846360143, now seen corresponding path program 548 times [2021-06-05 13:52:14,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:14,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888630347] [2021-06-05 13:52:14,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:14,717 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 13:52:14,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:14,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888630347] [2021-06-05 13:52:14,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888630347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:14,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706497160] [2021-06-05 13:52:14,717 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 13:52:14,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:52:14,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:14,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:52:14,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:14,912 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 13:52:14,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706497160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:14,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:14,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2021-06-05 13:52:14,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893164622] [2021-06-05 13:52:14,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:52:14,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:14,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:52:14,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:52:14,912 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 13:52:16,063 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-05 13:52:16,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:16,513 INFO L93 Difference]: Finished difference Result 43278 states and 137750 transitions. [2021-06-05 13:52:16,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-06-05 13:52:16,514 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 13:52:16,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:16,596 INFO L225 Difference]: With dead ends: 43278 [2021-06-05 13:52:16,596 INFO L226 Difference]: Without dead ends: 43262 [2021-06-05 13:52:16,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5785 ImplicationChecksByTransitivity, 1319.6ms TimeCoverageRelationStatistics Valid=3724, Invalid=11282, Unknown=0, NotChecked=0, Total=15006 [2021-06-05 13:52:16,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43262 states. [2021-06-05 13:52:17,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43262 to 39413. [2021-06-05 13:52:17,242 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 13:52:17,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39413 states to 39413 states and 127424 transitions. [2021-06-05 13:52:17,342 INFO L78 Accepts]: Start accepts. Automaton has 39413 states and 127424 transitions. Word has length 26 [2021-06-05 13:52:17,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:17,342 INFO L482 AbstractCegarLoop]: Abstraction has 39413 states and 127424 transitions. [2021-06-05 13:52:17,342 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 13:52:17,342 INFO L276 IsEmpty]: Start isEmpty. Operand 39413 states and 127424 transitions. [2021-06-05 13:52:17,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:52:17,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:17,399 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:17,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable993 [2021-06-05 13:52:17,599 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:17,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:17,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1619138763, now seen corresponding path program 549 times [2021-06-05 13:52:17,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:17,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33298169] [2021-06-05 13:52:17,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:17,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:17,662 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 13:52:17,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:17,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33298169] [2021-06-05 13:52:17,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33298169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:17,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751188988] [2021-06-05 13:52:17,663 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 13:52:17,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:52:17,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:17,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:52:17,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:17,842 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 13:52:17,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751188988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:17,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:17,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 29 [2021-06-05 13:52:17,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556762375] [2021-06-05 13:52:17,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 13:52:17,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:17,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 13:52:17,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:52:17,843 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 13:52:19,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:19,278 INFO L93 Difference]: Finished difference Result 44769 states and 142689 transitions. [2021-06-05 13:52:19,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-05 13:52:19,278 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 13:52:19,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:19,364 INFO L225 Difference]: With dead ends: 44769 [2021-06-05 13:52:19,364 INFO L226 Difference]: Without dead ends: 44749 [2021-06-05 13:52:19,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5055 ImplicationChecksByTransitivity, 1203.0ms TimeCoverageRelationStatistics Valid=3311, Invalid=10261, Unknown=0, NotChecked=0, Total=13572 [2021-06-05 13:52:19,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44749 states. [2021-06-05 13:52:20,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44749 to 41645. [2021-06-05 13:52:20,057 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 13:52:20,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41645 states to 41645 states and 134845 transitions. [2021-06-05 13:52:20,159 INFO L78 Accepts]: Start accepts. Automaton has 41645 states and 134845 transitions. Word has length 26 [2021-06-05 13:52:20,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:20,159 INFO L482 AbstractCegarLoop]: Abstraction has 41645 states and 134845 transitions. [2021-06-05 13:52:20,159 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 13:52:20,159 INFO L276 IsEmpty]: Start isEmpty. Operand 41645 states and 134845 transitions. [2021-06-05 13:52:20,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:52:20,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:20,209 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:20,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 553 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-06-05 13:52:20,409 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:20,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:20,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1129756721, now seen corresponding path program 550 times [2021-06-05 13:52:20,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:20,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110149918] [2021-06-05 13:52:20,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:20,484 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 13:52:20,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:20,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110149918] [2021-06-05 13:52:20,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110149918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:20,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202939087] [2021-06-05 13:52:20,484 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 13:52:20,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:52:20,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:20,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:52:20,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:20,677 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 13:52:20,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202939087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:20,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:20,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-05 13:52:20,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853042144] [2021-06-05 13:52:20,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 13:52:20,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:20,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 13:52:20,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:52:20,678 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 13:52:21,296 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2021-06-05 13:52:22,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:22,096 INFO L93 Difference]: Finished difference Result 47008 states and 150165 transitions. [2021-06-05 13:52:22,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 13:52:22,096 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 13:52:22,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:22,193 INFO L225 Difference]: With dead ends: 47008 [2021-06-05 13:52:22,193 INFO L226 Difference]: Without dead ends: 46984 [2021-06-05 13:52:22,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4499 ImplicationChecksByTransitivity, 1197.3ms TimeCoverageRelationStatistics Valid=3035, Invalid=9397, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 13:52:22,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46984 states. [2021-06-05 13:52:22,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46984 to 43802. [2021-06-05 13:52:22,904 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 13:52:23,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43802 states to 43802 states and 142069 transitions. [2021-06-05 13:52:23,012 INFO L78 Accepts]: Start accepts. Automaton has 43802 states and 142069 transitions. Word has length 26 [2021-06-05 13:52:23,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:23,013 INFO L482 AbstractCegarLoop]: Abstraction has 43802 states and 142069 transitions. [2021-06-05 13:52:23,013 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 13:52:23,013 INFO L276 IsEmpty]: Start isEmpty. Operand 43802 states and 142069 transitions. [2021-06-05 13:52:23,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:52:23,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:23,071 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:23,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable995 [2021-06-05 13:52:23,271 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:23,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:23,271 INFO L82 PathProgramCache]: Analyzing trace with hash -446170805, now seen corresponding path program 551 times [2021-06-05 13:52:23,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:23,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062247189] [2021-06-05 13:52:23,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:23,351 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 13:52:23,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:23,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062247189] [2021-06-05 13:52:23,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062247189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:23,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831553050] [2021-06-05 13:52:23,351 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 13:52:23,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:52:23,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:23,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:52:23,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:23,551 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 13:52:23,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831553050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:23,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:23,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-05 13:52:23,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442318866] [2021-06-05 13:52:23,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 13:52:23,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:23,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 13:52:23,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=717, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:52:23,552 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 13:52:24,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:24,718 INFO L93 Difference]: Finished difference Result 46885 states and 150062 transitions. [2021-06-05 13:52:24,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 13:52:24,718 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 13:52:24,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:24,818 INFO L225 Difference]: With dead ends: 46885 [2021-06-05 13:52:24,818 INFO L226 Difference]: Without dead ends: 46857 [2021-06-05 13:52:24,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3961 ImplicationChecksByTransitivity, 978.8ms TimeCoverageRelationStatistics Valid=2902, Invalid=8654, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 13:52:24,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46857 states. [2021-06-05 13:52:25,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46857 to 43877. [2021-06-05 13:52:25,549 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 13:52:25,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43877 states to 43877 states and 142307 transitions. [2021-06-05 13:52:25,661 INFO L78 Accepts]: Start accepts. Automaton has 43877 states and 142307 transitions. Word has length 26 [2021-06-05 13:52:25,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:25,661 INFO L482 AbstractCegarLoop]: Abstraction has 43877 states and 142307 transitions. [2021-06-05 13:52:25,661 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 13:52:25,661 INFO L276 IsEmpty]: Start isEmpty. Operand 43877 states and 142307 transitions. [2021-06-05 13:52:25,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:52:25,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:25,726 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:25,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable996,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:25,927 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:25,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:25,927 INFO L82 PathProgramCache]: Analyzing trace with hash -796911989, now seen corresponding path program 552 times [2021-06-05 13:52:25,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:25,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631905147] [2021-06-05 13:52:25,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:25,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:26,001 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 13:52:26,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:26,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631905147] [2021-06-05 13:52:26,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631905147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:26,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166842250] [2021-06-05 13:52:26,001 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 13:52:26,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:52:26,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:26,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:52:26,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:26,239 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 13:52:26,317 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 13:52:26,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166842250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:26,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:26,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-06-05 13:52:26,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954360180] [2021-06-05 13:52:26,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:52:26,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:26,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:52:26,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:52:26,318 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 13:52:26,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:26,635 INFO L93 Difference]: Finished difference Result 49441 states and 158707 transitions. [2021-06-05 13:52:26,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:52:26,636 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 13:52:26,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:26,743 INFO L225 Difference]: With dead ends: 49441 [2021-06-05 13:52:26,743 INFO L226 Difference]: Without dead ends: 49441 [2021-06-05 13:52:26,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 170.3ms TimeCoverageRelationStatistics Valid=307, Invalid=685, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:52:26,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49441 states. [2021-06-05 13:52:27,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49441 to 44031. [2021-06-05 13:52:27,539 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 13:52:27,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44031 states to 44031 states and 142772 transitions. [2021-06-05 13:52:27,636 INFO L78 Accepts]: Start accepts. Automaton has 44031 states and 142772 transitions. Word has length 26 [2021-06-05 13:52:27,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:27,636 INFO L482 AbstractCegarLoop]: Abstraction has 44031 states and 142772 transitions. [2021-06-05 13:52:27,636 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 13:52:27,636 INFO L276 IsEmpty]: Start isEmpty. Operand 44031 states and 142772 transitions. [2021-06-05 13:52:27,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:52:27,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:27,692 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:27,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable997 [2021-06-05 13:52:27,892 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:27,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:27,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1573297961, now seen corresponding path program 553 times [2021-06-05 13:52:27,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:27,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173281857] [2021-06-05 13:52:27,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:27,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:27,966 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 13:52:27,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:27,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173281857] [2021-06-05 13:52:27,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173281857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:27,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875509460] [2021-06-05 13:52:27,967 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 13:52:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:27,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:52:27,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:28,092 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 13:52:28,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875509460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:28,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:28,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:52:28,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597441527] [2021-06-05 13:52:28,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:52:28,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:28,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:52:28,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:52:28,093 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 13:52:28,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:28,494 INFO L93 Difference]: Finished difference Result 46562 states and 149936 transitions. [2021-06-05 13:52:28,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:52:28,495 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 13:52:28,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:28,572 INFO L225 Difference]: With dead ends: 46562 [2021-06-05 13:52:28,572 INFO L226 Difference]: Without dead ends: 46562 [2021-06-05 13:52:28,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 243.0ms TimeCoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:52:28,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46562 states. [2021-06-05 13:52:29,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46562 to 44113. [2021-06-05 13:52:29,363 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 13:52:29,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44113 states to 44113 states and 143018 transitions. [2021-06-05 13:52:29,473 INFO L78 Accepts]: Start accepts. Automaton has 44113 states and 143018 transitions. Word has length 26 [2021-06-05 13:52:29,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:29,473 INFO L482 AbstractCegarLoop]: Abstraction has 44113 states and 143018 transitions. [2021-06-05 13:52:29,473 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 13:52:29,473 INFO L276 IsEmpty]: Start isEmpty. Operand 44113 states and 143018 transitions. [2021-06-05 13:52:29,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:52:29,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:29,533 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:29,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable998,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:29,734 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:29,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:29,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1035805105, now seen corresponding path program 554 times [2021-06-05 13:52:29,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:29,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996380916] [2021-06-05 13:52:29,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:29,808 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 13:52:29,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:29,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996380916] [2021-06-05 13:52:29,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996380916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:29,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971230017] [2021-06-05 13:52:29,808 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 13:52:29,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:52:29,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:29,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:52:29,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:29,937 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 13:52:29,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971230017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:29,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:29,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:52:29,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884412523] [2021-06-05 13:52:29,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:52:29,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:29,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:52:29,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:52:29,938 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 13:52:30,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:30,549 INFO L93 Difference]: Finished difference Result 48235 states and 154817 transitions. [2021-06-05 13:52:30,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 13:52:30,549 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 13:52:30,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:30,647 INFO L225 Difference]: With dead ends: 48235 [2021-06-05 13:52:30,648 INFO L226 Difference]: Without dead ends: 48235 [2021-06-05 13:52:30,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 397.4ms TimeCoverageRelationStatistics Valid=1012, Invalid=2068, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 13:52:30,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48235 states. [2021-06-05 13:52:31,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48235 to 44213. [2021-06-05 13:52:31,692 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 13:52:31,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44213 states to 44213 states and 143318 transitions. [2021-06-05 13:52:31,803 INFO L78 Accepts]: Start accepts. Automaton has 44213 states and 143318 transitions. Word has length 26 [2021-06-05 13:52:31,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:31,803 INFO L482 AbstractCegarLoop]: Abstraction has 44213 states and 143318 transitions. [2021-06-05 13:52:31,804 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 13:52:31,804 INFO L276 IsEmpty]: Start isEmpty. Operand 44213 states and 143318 transitions. [2021-06-05 13:52:31,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:52:31,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:31,867 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:32,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable999,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:32,068 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:32,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:32,068 INFO L82 PathProgramCache]: Analyzing trace with hash -187182633, now seen corresponding path program 555 times [2021-06-05 13:52:32,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:32,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870399467] [2021-06-05 13:52:32,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:32,140 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 13:52:32,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:32,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870399467] [2021-06-05 13:52:32,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870399467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:32,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96795783] [2021-06-05 13:52:32,140 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 13:52:32,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:52:32,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:32,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:52:32,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:32,278 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 13:52:32,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96795783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:32,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:32,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:52:32,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408812697] [2021-06-05 13:52:32,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:52:32,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:32,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:52:32,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:52:32,279 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 13:52:33,049 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 13:52:33,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:33,323 INFO L93 Difference]: Finished difference Result 48961 states and 156816 transitions. [2021-06-05 13:52:33,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 13:52:33,323 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 13:52:33,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:33,425 INFO L225 Difference]: With dead ends: 48961 [2021-06-05 13:52:33,425 INFO L226 Difference]: Without dead ends: 48961 [2021-06-05 13:52:33,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1456 ImplicationChecksByTransitivity, 759.6ms TimeCoverageRelationStatistics Valid=1750, Invalid=3506, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 13:52:33,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48961 states. [2021-06-05 13:52:34,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48961 to 44558. [2021-06-05 13:52:34,338 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 13:52:34,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44558 states to 44558 states and 144353 transitions. [2021-06-05 13:52:34,543 INFO L78 Accepts]: Start accepts. Automaton has 44558 states and 144353 transitions. Word has length 26 [2021-06-05 13:52:34,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:34,543 INFO L482 AbstractCegarLoop]: Abstraction has 44558 states and 144353 transitions. [2021-06-05 13:52:34,543 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 13:52:34,543 INFO L276 IsEmpty]: Start isEmpty. Operand 44558 states and 144353 transitions. [2021-06-05 13:52:34,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:52:34,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:34,607 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:34,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1000 [2021-06-05 13:52:34,807 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:34,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:34,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1502760271, now seen corresponding path program 556 times [2021-06-05 13:52:34,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:34,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19082342] [2021-06-05 13:52:34,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:34,880 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 13:52:34,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:34,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19082342] [2021-06-05 13:52:34,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19082342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:34,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830213787] [2021-06-05 13:52:34,880 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 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 13:52:34,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:52:34,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:34,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:52:34,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:35,013 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 13:52:35,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830213787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:35,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:35,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:52:35,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436368884] [2021-06-05 13:52:35,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:52:35,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:35,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:52:35,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:52:35,014 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 13:52:36,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:36,287 INFO L93 Difference]: Finished difference Result 49314 states and 157697 transitions. [2021-06-05 13:52:36,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 13:52:36,288 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 13:52:36,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:36,385 INFO L225 Difference]: With dead ends: 49314 [2021-06-05 13:52:36,385 INFO L226 Difference]: Without dead ends: 49314 [2021-06-05 13:52:36,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 905.8ms TimeCoverageRelationStatistics Valid=2647, Invalid=5363, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 13:52:36,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49314 states. [2021-06-05 13:52:37,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49314 to 44956. [2021-06-05 13:52:37,153 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 13:52:37,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44956 states to 44956 states and 145544 transitions. [2021-06-05 13:52:37,418 INFO L78 Accepts]: Start accepts. Automaton has 44956 states and 145544 transitions. Word has length 26 [2021-06-05 13:52:37,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:37,418 INFO L482 AbstractCegarLoop]: Abstraction has 44956 states and 145544 transitions. [2021-06-05 13:52:37,418 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 13:52:37,418 INFO L276 IsEmpty]: Start isEmpty. Operand 44956 states and 145544 transitions. [2021-06-05 13:52:37,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:52:37,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:37,484 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:37,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1001 [2021-06-05 13:52:37,699 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:37,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:37,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1906408745, now seen corresponding path program 557 times [2021-06-05 13:52:37,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:37,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385567745] [2021-06-05 13:52:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:37,776 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 13:52:37,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:37,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385567745] [2021-06-05 13:52:37,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385567745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:37,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478111363] [2021-06-05 13:52:37,776 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 13:52:37,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:52:37,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:37,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:52:37,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:37,925 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 13:52:37,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478111363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:37,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:37,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:52:37,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579455901] [2021-06-05 13:52:37,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:52:37,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:37,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:52:37,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:52:37,926 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 13:52:39,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:39,555 INFO L93 Difference]: Finished difference Result 49524 states and 158196 transitions. [2021-06-05 13:52:39,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 13:52:39,556 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 13:52:39,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:39,657 INFO L225 Difference]: With dead ends: 49524 [2021-06-05 13:52:39,657 INFO L226 Difference]: Without dead ends: 49524 [2021-06-05 13:52:39,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3156 ImplicationChecksByTransitivity, 1236.5ms TimeCoverageRelationStatistics Valid=3467, Invalid=7039, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 13:52:39,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49524 states. [2021-06-05 13:52:40,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49524 to 45272. [2021-06-05 13:52:40,452 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 13:52:40,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45272 states to 45272 states and 146496 transitions. [2021-06-05 13:52:40,702 INFO L78 Accepts]: Start accepts. Automaton has 45272 states and 146496 transitions. Word has length 26 [2021-06-05 13:52:40,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:40,703 INFO L482 AbstractCegarLoop]: Abstraction has 45272 states and 146496 transitions. [2021-06-05 13:52:40,703 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 13:52:40,703 INFO L276 IsEmpty]: Start isEmpty. Operand 45272 states and 146496 transitions. [2021-06-05 13:52:40,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:52:40,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:40,754 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:40,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1002 [2021-06-05 13:52:40,955 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:40,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:40,955 INFO L82 PathProgramCache]: Analyzing trace with hash 200375375, now seen corresponding path program 558 times [2021-06-05 13:52:40,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:40,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131456512] [2021-06-05 13:52:40,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:41,026 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 13:52:41,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:41,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131456512] [2021-06-05 13:52:41,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131456512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:41,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316140671] [2021-06-05 13:52:41,026 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 13:52:41,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:52:41,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:41,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:52:41,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:41,159 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 13:52:41,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316140671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:41,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:41,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:52:41,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766344311] [2021-06-05 13:52:41,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:52:41,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:41,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:52:41,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:52:41,160 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 13:52:42,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:42,741 INFO L93 Difference]: Finished difference Result 49619 states and 158430 transitions. [2021-06-05 13:52:42,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 13:52:42,741 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 13:52:42,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:42,940 INFO L225 Difference]: With dead ends: 49619 [2021-06-05 13:52:42,940 INFO L226 Difference]: Without dead ends: 49619 [2021-06-05 13:52:42,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3332 ImplicationChecksByTransitivity, 1159.9ms TimeCoverageRelationStatistics Valid=3733, Invalid=7397, Unknown=0, NotChecked=0, Total=11130 [2021-06-05 13:52:42,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49619 states. [2021-06-05 13:52:43,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49619 to 45591. [2021-06-05 13:52:43,691 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 13:52:43,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45591 states to 45591 states and 147471 transitions. [2021-06-05 13:52:43,793 INFO L78 Accepts]: Start accepts. Automaton has 45591 states and 147471 transitions. Word has length 26 [2021-06-05 13:52:43,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:43,793 INFO L482 AbstractCegarLoop]: Abstraction has 45591 states and 147471 transitions. [2021-06-05 13:52:43,793 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 13:52:43,793 INFO L276 IsEmpty]: Start isEmpty. Operand 45591 states and 147471 transitions. [2021-06-05 13:52:43,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:52:43,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:43,853 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:44,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1003 [2021-06-05 13:52:44,053 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:44,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:44,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1948421161, now seen corresponding path program 559 times [2021-06-05 13:52:44,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:44,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574025115] [2021-06-05 13:52:44,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:44,127 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 13:52:44,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:44,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574025115] [2021-06-05 13:52:44,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574025115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:44,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110572436] [2021-06-05 13:52:44,128 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 13:52:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:44,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:52:44,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:44,401 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 13:52:44,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110572436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:44,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:44,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:52:44,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539924901] [2021-06-05 13:52:44,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:52:44,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:44,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:52:44,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:52:44,402 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 13:52:45,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:45,821 INFO L93 Difference]: Finished difference Result 50206 states and 160535 transitions. [2021-06-05 13:52:45,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 13:52:45,822 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 13:52:45,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:45,917 INFO L225 Difference]: With dead ends: 50206 [2021-06-05 13:52:45,917 INFO L226 Difference]: Without dead ends: 50206 [2021-06-05 13:52:45,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2827 ImplicationChecksByTransitivity, 1054.6ms TimeCoverageRelationStatistics Valid=3559, Invalid=6541, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 13:52:45,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50206 states. [2021-06-05 13:52:46,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50206 to 45971. [2021-06-05 13:52:46,806 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 13:52:47,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45971 states to 45971 states and 148892 transitions. [2021-06-05 13:52:47,091 INFO L78 Accepts]: Start accepts. Automaton has 45971 states and 148892 transitions. Word has length 26 [2021-06-05 13:52:47,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:47,091 INFO L482 AbstractCegarLoop]: Abstraction has 45971 states and 148892 transitions. [2021-06-05 13:52:47,091 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 13:52:47,091 INFO L276 IsEmpty]: Start isEmpty. Operand 45971 states and 148892 transitions. [2021-06-05 13:52:47,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:52:47,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:47,143 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:47,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1004 [2021-06-05 13:52:47,344 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:47,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:47,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1376966355, now seen corresponding path program 560 times [2021-06-05 13:52:47,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:47,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812036358] [2021-06-05 13:52:47,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:47,417 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 13:52:47,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:47,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812036358] [2021-06-05 13:52:47,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812036358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:47,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771555106] [2021-06-05 13:52:47,417 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 13:52:47,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:52:47,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:47,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:52:47,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:47,554 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 13:52:47,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771555106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:47,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:47,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:52:47,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714219927] [2021-06-05 13:52:47,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:52:47,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:47,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:52:47,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:52:47,555 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 13:52:48,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:48,888 INFO L93 Difference]: Finished difference Result 48233 states and 154779 transitions. [2021-06-05 13:52:48,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 13:52:48,888 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 13:52:48,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:48,967 INFO L225 Difference]: With dead ends: 48233 [2021-06-05 13:52:48,968 INFO L226 Difference]: Without dead ends: 48227 [2021-06-05 13:52:48,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3421 ImplicationChecksByTransitivity, 1058.0ms TimeCoverageRelationStatistics Valid=4219, Invalid=7991, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 13:52:49,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48227 states. [2021-06-05 13:52:49,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48227 to 43625. [2021-06-05 13:52:49,842 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 13:52:49,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43625 states to 43625 states and 141210 transitions. [2021-06-05 13:52:49,967 INFO L78 Accepts]: Start accepts. Automaton has 43625 states and 141210 transitions. Word has length 26 [2021-06-05 13:52:49,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:49,967 INFO L482 AbstractCegarLoop]: Abstraction has 43625 states and 141210 transitions. [2021-06-05 13:52:49,967 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 13:52:49,968 INFO L276 IsEmpty]: Start isEmpty. Operand 43625 states and 141210 transitions. [2021-06-05 13:52:50,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:52:50,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:50,162 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:50,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1005 [2021-06-05 13:52:50,362 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:50,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:50,362 INFO L82 PathProgramCache]: Analyzing trace with hash 986429395, now seen corresponding path program 561 times [2021-06-05 13:52:50,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:50,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856112864] [2021-06-05 13:52:50,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:50,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:50,437 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 13:52:50,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:50,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856112864] [2021-06-05 13:52:50,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856112864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:50,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306106541] [2021-06-05 13:52:50,437 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 13:52:50,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:52:50,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:50,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:52:50,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:50,586 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 13:52:50,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306106541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:50,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:50,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:52:50,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007340230] [2021-06-05 13:52:50,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:52:50,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:50,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:52:50,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:52:50,587 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 13:52:51,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:51,797 INFO L93 Difference]: Finished difference Result 54116 states and 173271 transitions. [2021-06-05 13:52:51,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 13:52:51,798 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 13:52:51,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:51,911 INFO L225 Difference]: With dead ends: 54116 [2021-06-05 13:52:51,912 INFO L226 Difference]: Without dead ends: 54098 [2021-06-05 13:52:51,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 922.3ms TimeCoverageRelationStatistics Valid=2504, Invalid=5506, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 13:52:51,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54098 states. [2021-06-05 13:52:52,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54098 to 49816. [2021-06-05 13:52:52,813 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 13:52:52,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49816 states to 49816 states and 161526 transitions. [2021-06-05 13:52:52,942 INFO L78 Accepts]: Start accepts. Automaton has 49816 states and 161526 transitions. Word has length 26 [2021-06-05 13:52:52,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:52,942 INFO L482 AbstractCegarLoop]: Abstraction has 49816 states and 161526 transitions. [2021-06-05 13:52:52,942 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 13:52:52,942 INFO L276 IsEmpty]: Start isEmpty. Operand 49816 states and 161526 transitions. [2021-06-05 13:52:53,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:52:53,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:53,000 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:53,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1006,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:53,200 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:53,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:53,200 INFO L82 PathProgramCache]: Analyzing trace with hash 521838291, now seen corresponding path program 562 times [2021-06-05 13:52:53,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:53,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362540449] [2021-06-05 13:52:53,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:53,272 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 13:52:53,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:53,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362540449] [2021-06-05 13:52:53,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362540449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:53,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401270549] [2021-06-05 13:52:53,273 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 13:52:53,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:52:53,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:53,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:52:53,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:53,467 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 13:52:53,569 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 13:52:53,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401270549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:53,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:53,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:52:53,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230910921] [2021-06-05 13:52:53,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:52:53,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:53,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:52:53,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:52:53,570 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 13:52:54,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:54,775 INFO L93 Difference]: Finished difference Result 53503 states and 171241 transitions. [2021-06-05 13:52:54,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 13:52:54,777 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 13:52:54,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:54,895 INFO L225 Difference]: With dead ends: 53503 [2021-06-05 13:52:54,895 INFO L226 Difference]: Without dead ends: 53499 [2021-06-05 13:52:54,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 926.8ms TimeCoverageRelationStatistics Valid=2139, Invalid=6791, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 13:52:54,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53499 states. [2021-06-05 13:52:55,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53499 to 47771. [2021-06-05 13:52:55,760 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 13:52:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47771 states to 47771 states and 154333 transitions. [2021-06-05 13:52:55,876 INFO L78 Accepts]: Start accepts. Automaton has 47771 states and 154333 transitions. Word has length 26 [2021-06-05 13:52:55,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:55,876 INFO L482 AbstractCegarLoop]: Abstraction has 47771 states and 154333 transitions. [2021-06-05 13:52:55,876 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 13:52:55,876 INFO L276 IsEmpty]: Start isEmpty. Operand 47771 states and 154333 transitions. [2021-06-05 13:52:55,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:52:55,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:55,940 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:56,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1007 [2021-06-05 13:52:56,141 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:56,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:56,141 INFO L82 PathProgramCache]: Analyzing trace with hash 488239063, now seen corresponding path program 563 times [2021-06-05 13:52:56,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:56,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834303681] [2021-06-05 13:52:56,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:56,213 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 13:52:56,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:56,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834303681] [2021-06-05 13:52:56,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834303681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:56,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975845388] [2021-06-05 13:52:56,213 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 13:52:56,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:52:56,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:56,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:52:56,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:56,358 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 13:52:56,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975845388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:56,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:56,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:52:56,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739680147] [2021-06-05 13:52:56,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:52:56,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:56,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:52:56,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:52:56,358 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 13:52:57,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:57,575 INFO L93 Difference]: Finished difference Result 52379 states and 167071 transitions. [2021-06-05 13:52:57,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 13:52:57,576 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 13:52:57,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:57,694 INFO L225 Difference]: With dead ends: 52379 [2021-06-05 13:52:57,694 INFO L226 Difference]: Without dead ends: 52371 [2021-06-05 13:52:57,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2557 ImplicationChecksByTransitivity, 908.4ms TimeCoverageRelationStatistics Valid=1836, Invalid=6174, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 13:52:57,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52371 states. [2021-06-05 13:52:58,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52371 to 48376. [2021-06-05 13:52:58,680 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 13:52:58,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48376 states to 48376 states and 156228 transitions. [2021-06-05 13:52:58,802 INFO L78 Accepts]: Start accepts. Automaton has 48376 states and 156228 transitions. Word has length 26 [2021-06-05 13:52:58,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:58,802 INFO L482 AbstractCegarLoop]: Abstraction has 48376 states and 156228 transitions. [2021-06-05 13:52:58,802 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 13:52:58,802 INFO L276 IsEmpty]: Start isEmpty. Operand 48376 states and 156228 transitions. [2021-06-05 13:52:58,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:52:58,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:58,871 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:59,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1008,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:59,071 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:59,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:59,072 INFO L82 PathProgramCache]: Analyzing trace with hash -553337005, now seen corresponding path program 564 times [2021-06-05 13:52:59,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:59,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799250982] [2021-06-05 13:52:59,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:59,143 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 13:52:59,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:59,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799250982] [2021-06-05 13:52:59,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799250982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:59,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764200400] [2021-06-05 13:52:59,144 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 13:52:59,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:52:59,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:59,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:52:59,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:59,287 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 13:52:59,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764200400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:59,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:59,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:52:59,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741263719] [2021-06-05 13:52:59,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:52:59,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:59,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:52:59,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:52:59,288 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 13:53:00,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:00,415 INFO L93 Difference]: Finished difference Result 53683 states and 171385 transitions. [2021-06-05 13:53:00,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 13:53:00,415 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 13:53:00,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:00,539 INFO L225 Difference]: With dead ends: 53683 [2021-06-05 13:53:00,539 INFO L226 Difference]: Without dead ends: 53671 [2021-06-05 13:53:00,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2272 ImplicationChecksByTransitivity, 811.6ms TimeCoverageRelationStatistics Valid=1573, Invalid=5567, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 13:53:00,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53671 states. [2021-06-05 13:53:01,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53671 to 49064. [2021-06-05 13:53:01,483 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 13:53:01,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49064 states to 49064 states and 158385 transitions. [2021-06-05 13:53:01,607 INFO L78 Accepts]: Start accepts. Automaton has 49064 states and 158385 transitions. Word has length 26 [2021-06-05 13:53:01,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:01,607 INFO L482 AbstractCegarLoop]: Abstraction has 49064 states and 158385 transitions. [2021-06-05 13:53:01,607 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 13:53:01,608 INFO L276 IsEmpty]: Start isEmpty. Operand 49064 states and 158385 transitions. [2021-06-05 13:53:01,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:53:01,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:01,677 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:01,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 568 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1009 [2021-06-05 13:53:01,878 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:01,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:01,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1517543255, now seen corresponding path program 565 times [2021-06-05 13:53:01,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:01,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457294127] [2021-06-05 13:53:01,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:02,070 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 13:53:02,122 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 13:53:02,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:02,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457294127] [2021-06-05 13:53:02,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457294127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:02,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627008227] [2021-06-05 13:53:02,123 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 13:53:02,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:02,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:53:02,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:02,264 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 13:53:02,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627008227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:02,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:02,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:53:02,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230120774] [2021-06-05 13:53:02,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:53:02,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:02,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:53:02,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:53:02,265 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 13:53:03,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:03,152 INFO L93 Difference]: Finished difference Result 55800 states and 178543 transitions. [2021-06-05 13:53:03,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 13:53:03,152 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 13:53:03,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:03,270 INFO L225 Difference]: With dead ends: 55800 [2021-06-05 13:53:03,270 INFO L226 Difference]: Without dead ends: 55784 [2021-06-05 13:53:03,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 796.0ms TimeCoverageRelationStatistics Valid=1351, Invalid=4969, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 13:53:03,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55784 states. [2021-06-05 13:53:04,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55784 to 49583. [2021-06-05 13:53:04,272 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 13:53:04,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49583 states to 49583 states and 159923 transitions. [2021-06-05 13:53:04,422 INFO L78 Accepts]: Start accepts. Automaton has 49583 states and 159923 transitions. Word has length 26 [2021-06-05 13:53:04,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:04,422 INFO L482 AbstractCegarLoop]: Abstraction has 49583 states and 159923 transitions. [2021-06-05 13:53:04,422 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 13:53:04,422 INFO L276 IsEmpty]: Start isEmpty. Operand 49583 states and 159923 transitions. [2021-06-05 13:53:04,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:53:04,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:04,500 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:04,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1010,569 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:04,701 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:04,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:04,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1290321875, now seen corresponding path program 566 times [2021-06-05 13:53:04,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:04,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484689079] [2021-06-05 13:53:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:04,779 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 13:53:04,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:04,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484689079] [2021-06-05 13:53:04,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484689079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:04,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935737207] [2021-06-05 13:53:04,779 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 13:53:04,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:53:04,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:04,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:53:04,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:04,934 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 13:53:04,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935737207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:04,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:04,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:53:04,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634428264] [2021-06-05 13:53:04,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:53:04,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:04,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:53:04,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:53:04,935 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 13:53:05,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:05,993 INFO L93 Difference]: Finished difference Result 57818 states and 185104 transitions. [2021-06-05 13:53:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 13:53:05,993 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 13:53:05,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:06,123 INFO L225 Difference]: With dead ends: 57818 [2021-06-05 13:53:06,123 INFO L226 Difference]: Without dead ends: 57798 [2021-06-05 13:53:06,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 633.2ms TimeCoverageRelationStatistics Valid=1171, Invalid=4379, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 13:53:06,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57798 states. [2021-06-05 13:53:07,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57798 to 49898. [2021-06-05 13:53:07,139 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 13:53:07,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49898 states to 49898 states and 160816 transitions. [2021-06-05 13:53:07,271 INFO L78 Accepts]: Start accepts. Automaton has 49898 states and 160816 transitions. Word has length 26 [2021-06-05 13:53:07,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:07,271 INFO L482 AbstractCegarLoop]: Abstraction has 49898 states and 160816 transitions. [2021-06-05 13:53:07,271 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 13:53:07,271 INFO L276 IsEmpty]: Start isEmpty. Operand 49898 states and 160816 transitions. [2021-06-05 13:53:07,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:53:07,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:07,343 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:07,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 570 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1011 [2021-06-05 13:53:07,543 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:07,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:07,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1458573609, now seen corresponding path program 567 times [2021-06-05 13:53:07,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:07,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823453308] [2021-06-05 13:53:07,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:07,615 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 13:53:07,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:07,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823453308] [2021-06-05 13:53:07,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823453308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:07,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277670] [2021-06-05 13:53:07,616 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 13:53:07,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:53:07,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:07,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:53:07,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:07,814 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-05 13:53:07,941 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 13:53:07,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:07,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:07,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:53:07,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996981381] [2021-06-05 13:53:07,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:53:07,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:07,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:53:07,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:53:07,942 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 13:53:08,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:08,715 INFO L93 Difference]: Finished difference Result 58044 states and 185269 transitions. [2021-06-05 13:53:08,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 13:53:08,715 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 13:53:08,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:08,843 INFO L225 Difference]: With dead ends: 58044 [2021-06-05 13:53:08,844 INFO L226 Difference]: Without dead ends: 58020 [2021-06-05 13:53:08,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 550.6ms TimeCoverageRelationStatistics Valid=1034, Invalid=3796, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 13:53:08,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58020 states. [2021-06-05 13:53:09,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58020 to 49955. [2021-06-05 13:53:09,922 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 13:53:10,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49955 states to 49955 states and 160964 transitions. [2021-06-05 13:53:10,068 INFO L78 Accepts]: Start accepts. Automaton has 49955 states and 160964 transitions. Word has length 26 [2021-06-05 13:53:10,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:10,068 INFO L482 AbstractCegarLoop]: Abstraction has 49955 states and 160964 transitions. [2021-06-05 13:53:10,069 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 13:53:10,069 INFO L276 IsEmpty]: Start isEmpty. Operand 49955 states and 160964 transitions. [2021-06-05 13:53:10,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:53:10,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:10,144 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:10,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1012 [2021-06-05 13:53:10,344 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:10,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:10,345 INFO L82 PathProgramCache]: Analyzing trace with hash -774987693, now seen corresponding path program 568 times [2021-06-05 13:53:10,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:10,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224972594] [2021-06-05 13:53:10,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:10,430 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 13:53:10,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:10,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224972594] [2021-06-05 13:53:10,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224972594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:10,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428842303] [2021-06-05 13:53:10,430 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 13:53:10,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:53:10,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:10,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:53:10,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:10,591 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 13:53:10,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428842303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:10,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:10,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 13:53:10,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293257194] [2021-06-05 13:53:10,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:53:10,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:10,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:53:10,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:53:10,592 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 13:53:11,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:11,246 INFO L93 Difference]: Finished difference Result 53108 states and 169486 transitions. [2021-06-05 13:53:11,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 13:53:11,246 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 13:53:11,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:11,374 INFO L225 Difference]: With dead ends: 53108 [2021-06-05 13:53:11,374 INFO L226 Difference]: Without dead ends: 53094 [2021-06-05 13:53:11,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 476.5ms TimeCoverageRelationStatistics Valid=776, Invalid=2646, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 13:53:11,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53094 states. [2021-06-05 13:53:12,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53094 to 49955. [2021-06-05 13:53:12,401 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 13:53:12,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49955 states to 49955 states and 160957 transitions. [2021-06-05 13:53:12,537 INFO L78 Accepts]: Start accepts. Automaton has 49955 states and 160957 transitions. Word has length 26 [2021-06-05 13:53:12,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:12,537 INFO L482 AbstractCegarLoop]: Abstraction has 49955 states and 160957 transitions. [2021-06-05 13:53:12,537 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 13:53:12,537 INFO L276 IsEmpty]: Start isEmpty. Operand 49955 states and 160957 transitions. [2021-06-05 13:53:12,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:53:12,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:12,607 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:12,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1013 [2021-06-05 13:53:12,808 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:12,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:12,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1068611881, now seen corresponding path program 569 times [2021-06-05 13:53:12,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:12,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729271480] [2021-06-05 13:53:12,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:12,882 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 13:53:12,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:12,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729271480] [2021-06-05 13:53:12,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729271480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:12,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753175294] [2021-06-05 13:53:12,882 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 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 13:53:12,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:53:12,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:12,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:53:12,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:13,016 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 13:53:13,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753175294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:13,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:13,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-06-05 13:53:13,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845716763] [2021-06-05 13:53:13,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:53:13,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:13,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:53:13,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:53:13,017 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 13:53:13,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:13,352 INFO L93 Difference]: Finished difference Result 52810 states and 168954 transitions. [2021-06-05 13:53:13,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:53:13,352 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 13:53:13,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:13,475 INFO L225 Difference]: With dead ends: 52810 [2021-06-05 13:53:13,475 INFO L226 Difference]: Without dead ends: 52794 [2021-06-05 13:53:13,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 228.4ms TimeCoverageRelationStatistics Valid=372, Invalid=1110, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 13:53:13,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52794 states. [2021-06-05 13:53:14,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52794 to 49955. [2021-06-05 13:53:14,679 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 13:53:14,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49955 states to 49955 states and 160956 transitions. [2021-06-05 13:53:14,836 INFO L78 Accepts]: Start accepts. Automaton has 49955 states and 160956 transitions. Word has length 26 [2021-06-05 13:53:14,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:14,836 INFO L482 AbstractCegarLoop]: Abstraction has 49955 states and 160956 transitions. [2021-06-05 13:53:14,836 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 13:53:14,836 INFO L276 IsEmpty]: Start isEmpty. Operand 49955 states and 160956 transitions. [2021-06-05 13:53:14,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:53:14,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:14,916 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:15,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1014,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:15,117 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:15,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:15,117 INFO L82 PathProgramCache]: Analyzing trace with hash 128540683, now seen corresponding path program 570 times [2021-06-05 13:53:15,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:15,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684983640] [2021-06-05 13:53:15,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:15,197 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 13:53:15,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:15,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684983640] [2021-06-05 13:53:15,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684983640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:15,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800793687] [2021-06-05 13:53:15,197 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 13:53:15,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:53:15,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:15,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:53:15,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:15,353 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 13:53:15,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800793687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:15,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:15,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2021-06-05 13:53:15,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527727738] [2021-06-05 13:53:15,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:53:15,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:15,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:53:15,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:53:15,354 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 13:53:16,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:16,332 INFO L93 Difference]: Finished difference Result 53881 states and 172251 transitions. [2021-06-05 13:53:16,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 13:53:16,332 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 13:53:16,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:16,620 INFO L225 Difference]: With dead ends: 53881 [2021-06-05 13:53:16,620 INFO L226 Difference]: Without dead ends: 53881 [2021-06-05 13:53:16,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 650.3ms TimeCoverageRelationStatistics Valid=1812, Invalid=3738, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 13:53:16,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53881 states. [2021-06-05 13:53:17,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53881 to 50067. [2021-06-05 13:53:17,470 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 13:53:17,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50067 states to 50067 states and 161292 transitions. [2021-06-05 13:53:17,584 INFO L78 Accepts]: Start accepts. Automaton has 50067 states and 161292 transitions. Word has length 26 [2021-06-05 13:53:17,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:17,584 INFO L482 AbstractCegarLoop]: Abstraction has 50067 states and 161292 transitions. [2021-06-05 13:53:17,584 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 13:53:17,584 INFO L276 IsEmpty]: Start isEmpty. Operand 50067 states and 161292 transitions. [2021-06-05 13:53:17,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:53:17,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:17,641 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:17,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1015 [2021-06-05 13:53:17,841 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:17,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:17,841 INFO L82 PathProgramCache]: Analyzing trace with hash 148442891, now seen corresponding path program 571 times [2021-06-05 13:53:17,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:17,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290779538] [2021-06-05 13:53:17,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:17,907 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 13:53:17,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:17,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290779538] [2021-06-05 13:53:17,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290779538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:17,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036753511] [2021-06-05 13:53:17,908 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 13:53:17,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:17,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:53:17,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:18,045 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 13:53:18,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036753511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:18,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:18,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-06-05 13:53:18,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730276154] [2021-06-05 13:53:18,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:53:18,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:18,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:53:18,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:53:18,046 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 13:53:18,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:18,856 INFO L93 Difference]: Finished difference Result 54829 states and 174767 transitions. [2021-06-05 13:53:18,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 13:53:18,857 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 13:53:18,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:19,170 INFO L225 Difference]: With dead ends: 54829 [2021-06-05 13:53:19,170 INFO L226 Difference]: Without dead ends: 54811 [2021-06-05 13:53:19,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 528.2ms TimeCoverageRelationStatistics Valid=1414, Invalid=3008, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 13:53:19,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54811 states. [2021-06-05 13:53:20,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54811 to 50138. [2021-06-05 13:53:20,102 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 13:53:20,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50138 states to 50138 states and 161501 transitions. [2021-06-05 13:53:20,241 INFO L78 Accepts]: Start accepts. Automaton has 50138 states and 161501 transitions. Word has length 26 [2021-06-05 13:53:20,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:20,242 INFO L482 AbstractCegarLoop]: Abstraction has 50138 states and 161501 transitions. [2021-06-05 13:53:20,242 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 13:53:20,242 INFO L276 IsEmpty]: Start isEmpty. Operand 50138 states and 161501 transitions. [2021-06-05 13:53:20,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:53:20,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:20,317 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:20,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1016,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:20,517 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:20,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:20,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1534558219, now seen corresponding path program 572 times [2021-06-05 13:53:20,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:20,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459847631] [2021-06-05 13:53:20,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:20,591 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 13:53:20,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:20,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459847631] [2021-06-05 13:53:20,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459847631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:20,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299888405] [2021-06-05 13:53:20,591 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 13:53:20,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:53:20,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:20,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:53:20,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:20,752 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 13:53:20,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299888405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:20,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:20,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-06-05 13:53:20,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297849880] [2021-06-05 13:53:20,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:53:20,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:20,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:53:20,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:53:20,753 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 13:53:21,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:21,617 INFO L93 Difference]: Finished difference Result 54497 states and 173635 transitions. [2021-06-05 13:53:21,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 13:53:21,618 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 13:53:21,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:21,749 INFO L225 Difference]: With dead ends: 54497 [2021-06-05 13:53:21,749 INFO L226 Difference]: Without dead ends: 54469 [2021-06-05 13:53:21,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 563.9ms TimeCoverageRelationStatistics Valid=1210, Invalid=2696, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 13:53:21,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54469 states. [2021-06-05 13:53:22,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54469 to 50238. [2021-06-05 13:53:22,813 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 13:53:22,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50238 states to 50238 states and 161791 transitions. [2021-06-05 13:53:22,944 INFO L78 Accepts]: Start accepts. Automaton has 50238 states and 161791 transitions. Word has length 26 [2021-06-05 13:53:22,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:22,944 INFO L482 AbstractCegarLoop]: Abstraction has 50238 states and 161791 transitions. [2021-06-05 13:53:22,944 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 13:53:22,944 INFO L276 IsEmpty]: Start isEmpty. Operand 50238 states and 161791 transitions. [2021-06-05 13:53:23,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:53:23,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:23,014 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:23,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1017 [2021-06-05 13:53:23,215 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:23,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:23,215 INFO L82 PathProgramCache]: Analyzing trace with hash -221843701, now seen corresponding path program 573 times [2021-06-05 13:53:23,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:23,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135096176] [2021-06-05 13:53:23,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:23,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:23,280 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 13:53:23,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:23,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135096176] [2021-06-05 13:53:23,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135096176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:23,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152588754] [2021-06-05 13:53:23,280 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 13:53:23,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:53:23,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:23,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:53:23,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:23,418 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 13:53:23,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152588754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:23,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:23,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-06-05 13:53:23,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055673557] [2021-06-05 13:53:23,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:53:23,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:23,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:53:23,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:53:23,419 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 13:53:24,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:24,629 INFO L93 Difference]: Finished difference Result 54434 states and 173222 transitions. [2021-06-05 13:53:24,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 13:53:24,630 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 13:53:24,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:24,743 INFO L225 Difference]: With dead ends: 54434 [2021-06-05 13:53:24,744 INFO L226 Difference]: Without dead ends: 54416 [2021-06-05 13:53:24,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1876 ImplicationChecksByTransitivity, 737.8ms TimeCoverageRelationStatistics Valid=2147, Invalid=4659, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 13:53:24,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54416 states. [2021-06-05 13:53:25,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54416 to 50458. [2021-06-05 13:53:25,674 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 13:53:25,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50458 states to 50458 states and 162424 transitions. [2021-06-05 13:53:25,826 INFO L78 Accepts]: Start accepts. Automaton has 50458 states and 162424 transitions. Word has length 26 [2021-06-05 13:53:25,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:25,826 INFO L482 AbstractCegarLoop]: Abstraction has 50458 states and 162424 transitions. [2021-06-05 13:53:25,826 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 13:53:25,826 INFO L276 IsEmpty]: Start isEmpty. Operand 50458 states and 162424 transitions. [2021-06-05 13:53:25,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:53:25,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:25,906 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:26,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1018,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:26,106 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:26,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:26,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1941069813, now seen corresponding path program 574 times [2021-06-05 13:53:26,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:26,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111758866] [2021-06-05 13:53:26,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:26,177 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 13:53:26,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:26,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111758866] [2021-06-05 13:53:26,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111758866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:26,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033439944] [2021-06-05 13:53:26,177 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 13:53:26,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:53:26,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:26,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:53:26,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:26,327 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 13:53:26,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033439944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:26,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:26,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-06-05 13:53:26,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153337154] [2021-06-05 13:53:26,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:53:26,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:26,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:53:26,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:53:26,328 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 13:53:27,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:27,854 INFO L93 Difference]: Finished difference Result 54967 states and 174638 transitions. [2021-06-05 13:53:27,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 13:53:27,854 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 13:53:27,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:27,972 INFO L225 Difference]: With dead ends: 54967 [2021-06-05 13:53:27,973 INFO L226 Difference]: Without dead ends: 54957 [2021-06-05 13:53:27,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2646 ImplicationChecksByTransitivity, 1126.2ms TimeCoverageRelationStatistics Valid=2993, Invalid=6319, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 13:53:28,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54957 states. [2021-06-05 13:53:28,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54957 to 50789. [2021-06-05 13:53:28,918 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 13:53:29,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50789 states to 50789 states and 163402 transitions. [2021-06-05 13:53:29,053 INFO L78 Accepts]: Start accepts. Automaton has 50789 states and 163402 transitions. Word has length 26 [2021-06-05 13:53:29,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:29,054 INFO L482 AbstractCegarLoop]: Abstraction has 50789 states and 163402 transitions. [2021-06-05 13:53:29,054 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 13:53:29,054 INFO L276 IsEmpty]: Start isEmpty. Operand 50789 states and 163402 transitions. [2021-06-05 13:53:29,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:53:29,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:29,125 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:29,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 578 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1019 [2021-06-05 13:53:29,326 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:29,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:29,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1051512587, now seen corresponding path program 575 times [2021-06-05 13:53:29,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:29,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341958056] [2021-06-05 13:53:29,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:29,395 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 13:53:29,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:29,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341958056] [2021-06-05 13:53:29,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341958056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:29,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637275821] [2021-06-05 13:53:29,395 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 13:53:29,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:53:29,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:29,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:53:29,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:29,553 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 13:53:29,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637275821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:29,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:29,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-06-05 13:53:29,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428172511] [2021-06-05 13:53:29,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:53:29,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:29,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:53:29,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=437, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:53:29,553 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 13:53:30,599 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2021-06-05 13:53:31,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:31,463 INFO L93 Difference]: Finished difference Result 56559 states and 179353 transitions. [2021-06-05 13:53:31,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 13:53:31,464 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 13:53:31,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:31,593 INFO L225 Difference]: With dead ends: 56559 [2021-06-05 13:53:31,593 INFO L226 Difference]: Without dead ends: 56555 [2021-06-05 13:53:31,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2956 ImplicationChecksByTransitivity, 1420.5ms TimeCoverageRelationStatistics Valid=3487, Invalid=7019, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 13:53:31,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56555 states. [2021-06-05 13:53:32,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56555 to 51049. [2021-06-05 13:53:32,755 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 13:53:32,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51049 states to 51049 states and 164137 transitions. [2021-06-05 13:53:32,888 INFO L78 Accepts]: Start accepts. Automaton has 51049 states and 164137 transitions. Word has length 26 [2021-06-05 13:53:32,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:32,888 INFO L482 AbstractCegarLoop]: Abstraction has 51049 states and 164137 transitions. [2021-06-05 13:53:32,888 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 13:53:32,888 INFO L276 IsEmpty]: Start isEmpty. Operand 51049 states and 164137 transitions. [2021-06-05 13:53:32,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:53:32,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:32,958 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:33,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1020,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:33,159 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:33,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:33,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1009500171, now seen corresponding path program 576 times [2021-06-05 13:53:33,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:33,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957632634] [2021-06-05 13:53:33,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:33,226 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 13:53:33,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:33,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957632634] [2021-06-05 13:53:33,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957632634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:33,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526873409] [2021-06-05 13:53:33,226 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 13:53:33,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:53:33,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:33,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:53:33,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:33,378 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 13:53:33,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526873409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:33,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:33,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-06-05 13:53:33,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697515496] [2021-06-05 13:53:33,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:53:33,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:33,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:53:33,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:53:33,379 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 13:53:33,667 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 13:53:34,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:34,933 INFO L93 Difference]: Finished difference Result 57225 states and 181814 transitions. [2021-06-05 13:53:34,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 13:53:34,934 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 13:53:34,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:35,054 INFO L225 Difference]: With dead ends: 57225 [2021-06-05 13:53:35,054 INFO L226 Difference]: Without dead ends: 57225 [2021-06-05 13:53:35,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2646 ImplicationChecksByTransitivity, 1117.5ms TimeCoverageRelationStatistics Valid=3387, Invalid=6315, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 13:53:35,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57225 states. [2021-06-05 13:53:35,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57225 to 51568. [2021-06-05 13:53:36,038 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 13:53:36,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51568 states to 51568 states and 166156 transitions. [2021-06-05 13:53:36,178 INFO L78 Accepts]: Start accepts. Automaton has 51568 states and 166156 transitions. Word has length 26 [2021-06-05 13:53:36,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:36,178 INFO L482 AbstractCegarLoop]: Abstraction has 51568 states and 166156 transitions. [2021-06-05 13:53:36,178 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 13:53:36,178 INFO L276 IsEmpty]: Start isEmpty. Operand 51568 states and 166156 transitions. [2021-06-05 13:53:36,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:53:36,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:36,432 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:36,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1021,580 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:36,632 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:36,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:36,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1580954977, now seen corresponding path program 577 times [2021-06-05 13:53:36,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:36,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025999394] [2021-06-05 13:53:36,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:36,703 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 13:53:36,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:36,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025999394] [2021-06-05 13:53:36,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025999394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:36,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835691959] [2021-06-05 13:53:36,704 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 13:53:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:36,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:53:36,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:36,846 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 13:53:36,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835691959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:36,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:36,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-06-05 13:53:36,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137496190] [2021-06-05 13:53:36,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:53:36,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:36,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:53:36,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:53:36,847 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 13:53:38,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:38,340 INFO L93 Difference]: Finished difference Result 54451 states and 173513 transitions. [2021-06-05 13:53:38,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 13:53:38,341 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 13:53:38,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:38,455 INFO L225 Difference]: With dead ends: 54451 [2021-06-05 13:53:38,456 INFO L226 Difference]: Without dead ends: 54433 [2021-06-05 13:53:38,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3450 ImplicationChecksByTransitivity, 1101.5ms TimeCoverageRelationStatistics Valid=4100, Invalid=8332, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 13:53:38,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54433 states. [2021-06-05 13:53:39,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54433 to 50138. [2021-06-05 13:53:39,528 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 13:53:39,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50138 states to 50138 states and 161284 transitions. [2021-06-05 13:53:39,652 INFO L78 Accepts]: Start accepts. Automaton has 50138 states and 161284 transitions. Word has length 26 [2021-06-05 13:53:39,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:39,652 INFO L482 AbstractCegarLoop]: Abstraction has 50138 states and 161284 transitions. [2021-06-05 13:53:39,652 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 13:53:39,652 INFO L276 IsEmpty]: Start isEmpty. Operand 50138 states and 161284 transitions. [2021-06-05 13:53:39,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:53:39,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:39,722 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:39,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1022,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:39,923 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:39,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:39,923 INFO L82 PathProgramCache]: Analyzing trace with hash 2116184779, now seen corresponding path program 578 times [2021-06-05 13:53:39,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:39,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666583352] [2021-06-05 13:53:39,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:39,999 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 13:53:39,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:39,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666583352] [2021-06-05 13:53:39,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666583352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:39,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894498029] [2021-06-05 13:53:39,999 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 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 13:53:40,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:53:40,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:40,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:53:40,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:40,147 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 13:53:40,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894498029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:40,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:40,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2021-06-05 13:53:40,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370601485] [2021-06-05 13:53:40,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:53:40,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:40,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:53:40,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:53:40,148 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 13:53:41,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:41,599 INFO L93 Difference]: Finished difference Result 52941 states and 168695 transitions. [2021-06-05 13:53:41,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 13:53:41,599 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 13:53:41,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:41,704 INFO L225 Difference]: With dead ends: 52941 [2021-06-05 13:53:41,704 INFO L226 Difference]: Without dead ends: 52929 [2021-06-05 13:53:41,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3698 ImplicationChecksByTransitivity, 971.9ms TimeCoverageRelationStatistics Valid=4157, Invalid=8499, Unknown=0, NotChecked=0, Total=12656 [2021-06-05 13:53:41,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52929 states. [2021-06-05 13:53:42,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52929 to 50257. [2021-06-05 13:53:42,589 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 13:53:42,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50257 states to 50257 states and 161638 transitions. [2021-06-05 13:53:42,719 INFO L78 Accepts]: Start accepts. Automaton has 50257 states and 161638 transitions. Word has length 26 [2021-06-05 13:53:42,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:42,719 INFO L482 AbstractCegarLoop]: Abstraction has 50257 states and 161638 transitions. [2021-06-05 13:53:42,719 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 13:53:42,720 INFO L276 IsEmpty]: Start isEmpty. Operand 50257 states and 161638 transitions. [2021-06-05 13:53:42,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:53:42,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:42,789 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:42,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1023 [2021-06-05 13:53:42,989 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:42,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:42,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1345931095, now seen corresponding path program 579 times [2021-06-05 13:53:42,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:42,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929111573] [2021-06-05 13:53:42,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:43,064 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 13:53:43,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:43,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929111573] [2021-06-05 13:53:43,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929111573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:43,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844081818] [2021-06-05 13:53:43,064 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 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 13:53:43,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:53:43,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:43,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:53:43,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:43,218 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 13:53:43,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844081818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:43,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:43,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2021-06-05 13:53:43,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304716320] [2021-06-05 13:53:43,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 13:53:43,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:43,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 13:53:43,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:53:43,219 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 13:53:44,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:44,246 INFO L93 Difference]: Finished difference Result 54325 states and 173260 transitions. [2021-06-05 13:53:44,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 13:53:44,246 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 13:53:44,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:44,580 INFO L225 Difference]: With dead ends: 54325 [2021-06-05 13:53:44,580 INFO L226 Difference]: Without dead ends: 54325 [2021-06-05 13:53:44,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2085 ImplicationChecksByTransitivity, 703.0ms TimeCoverageRelationStatistics Valid=2083, Invalid=4559, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 13:53:44,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54325 states. [2021-06-05 13:53:45,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54325 to 50201. [2021-06-05 13:53:45,532 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 13:53:45,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50201 states to 50201 states and 161470 transitions. [2021-06-05 13:53:45,667 INFO L78 Accepts]: Start accepts. Automaton has 50201 states and 161470 transitions. Word has length 26 [2021-06-05 13:53:45,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:45,667 INFO L482 AbstractCegarLoop]: Abstraction has 50201 states and 161470 transitions. [2021-06-05 13:53:45,667 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 13:53:45,667 INFO L276 IsEmpty]: Start isEmpty. Operand 50201 states and 161470 transitions. [2021-06-05 13:53:45,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:53:45,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:45,740 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:45,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1024 [2021-06-05 13:53:45,940 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:45,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:45,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1794574897, now seen corresponding path program 580 times [2021-06-05 13:53:45,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:45,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55966567] [2021-06-05 13:53:45,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:46,006 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 13:53:46,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:46,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55966567] [2021-06-05 13:53:46,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55966567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:46,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041711058] [2021-06-05 13:53:46,007 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 13:53:46,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:53:46,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:46,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:53:46,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:46,156 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 13:53:46,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041711058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:46,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:46,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 26 [2021-06-05 13:53:46,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344205347] [2021-06-05 13:53:46,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:53:46,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:46,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:53:46,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:53:46,157 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 13:53:47,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:47,080 INFO L93 Difference]: Finished difference Result 54878 states and 174672 transitions. [2021-06-05 13:53:47,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 13:53:47,081 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 13:53:47,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:47,201 INFO L225 Difference]: With dead ends: 54878 [2021-06-05 13:53:47,201 INFO L226 Difference]: Without dead ends: 54860 [2021-06-05 13:53:47,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 621.3ms TimeCoverageRelationStatistics Valid=1654, Invalid=3748, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 13:53:47,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54860 states. [2021-06-05 13:53:48,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54860 to 50207. [2021-06-05 13:53:48,213 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 13:53:48,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50207 states to 50207 states and 161482 transitions. [2021-06-05 13:53:48,535 INFO L78 Accepts]: Start accepts. Automaton has 50207 states and 161482 transitions. Word has length 26 [2021-06-05 13:53:48,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:48,535 INFO L482 AbstractCegarLoop]: Abstraction has 50207 states and 161482 transitions. [2021-06-05 13:53:48,535 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 13:53:48,535 INFO L276 IsEmpty]: Start isEmpty. Operand 50207 states and 161482 transitions. [2021-06-05 13:53:48,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:53:48,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:48,598 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:48,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 584 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1025 [2021-06-05 13:53:48,798 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:48,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:48,798 INFO L82 PathProgramCache]: Analyzing trace with hash -926050217, now seen corresponding path program 581 times [2021-06-05 13:53:48,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:48,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895292770] [2021-06-05 13:53:48,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:48,858 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 13:53:48,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:48,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895292770] [2021-06-05 13:53:48,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895292770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:48,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181879341] [2021-06-05 13:53:48,858 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 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 13:53:48,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:53:48,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:48,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:53:48,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:49,008 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 13:53:49,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181879341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:49,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:49,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-06-05 13:53:49,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927421522] [2021-06-05 13:53:49,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:53:49,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:49,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:53:49,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:53:49,009 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 13:53:49,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:49,955 INFO L93 Difference]: Finished difference Result 55305 states and 175642 transitions. [2021-06-05 13:53:49,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 13:53:49,955 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 13:53:49,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:50,073 INFO L225 Difference]: With dead ends: 55305 [2021-06-05 13:53:50,073 INFO L226 Difference]: Without dead ends: 55291 [2021-06-05 13:53:50,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 641.2ms TimeCoverageRelationStatistics Valid=1702, Invalid=3848, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 13:53:50,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55291 states. [2021-06-05 13:53:51,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55291 to 50371. [2021-06-05 13:53:51,108 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 13:53:51,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50371 states to 50371 states and 161966 transitions. [2021-06-05 13:53:51,434 INFO L78 Accepts]: Start accepts. Automaton has 50371 states and 161966 transitions. Word has length 26 [2021-06-05 13:53:51,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:51,434 INFO L482 AbstractCegarLoop]: Abstraction has 50371 states and 161966 transitions. [2021-06-05 13:53:51,434 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 13:53:51,434 INFO L276 IsEmpty]: Start isEmpty. Operand 50371 states and 161966 transitions. [2021-06-05 13:53:51,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:53:51,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:51,503 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:51,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1026 [2021-06-05 13:53:51,703 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:51,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:51,703 INFO L82 PathProgramCache]: Analyzing trace with hash -2144959281, now seen corresponding path program 582 times [2021-06-05 13:53:51,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:51,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197986983] [2021-06-05 13:53:51,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:51,774 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 13:53:51,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:51,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197986983] [2021-06-05 13:53:51,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197986983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:51,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930708383] [2021-06-05 13:53:51,774 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 13:53:51,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:53:51,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:51,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:53:51,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:51,922 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 13:53:51,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930708383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:51,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:51,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-06-05 13:53:51,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803021018] [2021-06-05 13:53:51,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:53:51,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:51,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:53:51,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:53:51,923 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 13:53:52,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:52,895 INFO L93 Difference]: Finished difference Result 53970 states and 171749 transitions. [2021-06-05 13:53:52,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 13:53:52,896 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 13:53:52,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:53,008 INFO L225 Difference]: With dead ends: 53970 [2021-06-05 13:53:53,009 INFO L226 Difference]: Without dead ends: 53952 [2021-06-05 13:53:53,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 680.6ms TimeCoverageRelationStatistics Valid=1778, Invalid=3922, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 13:53:53,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53952 states. [2021-06-05 13:53:53,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53952 to 50515. [2021-06-05 13:53:53,965 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 13:53:54,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50515 states to 50515 states and 162361 transitions. [2021-06-05 13:53:54,092 INFO L78 Accepts]: Start accepts. Automaton has 50515 states and 162361 transitions. Word has length 26 [2021-06-05 13:53:54,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:54,092 INFO L482 AbstractCegarLoop]: Abstraction has 50515 states and 162361 transitions. [2021-06-05 13:53:54,092 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 13:53:54,092 INFO L276 IsEmpty]: Start isEmpty. Operand 50515 states and 162361 transitions. [2021-06-05 13:53:54,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:53:54,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:54,161 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:54,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1027,586 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:54,361 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:54,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:54,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1279404375, now seen corresponding path program 583 times [2021-06-05 13:53:54,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:54,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841110567] [2021-06-05 13:53:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:54,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:54,546 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 13:53:54,564 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 13:53:54,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:54,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841110567] [2021-06-05 13:53:54,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841110567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:54,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681088762] [2021-06-05 13:53:54,564 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 13:53:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:54,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:53:54,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:54,718 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 13:53:54,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681088762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:54,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:54,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-06-05 13:53:54,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770893969] [2021-06-05 13:53:54,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:53:54,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:54,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:53:54,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:53:54,718 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 13:53:55,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:55,977 INFO L93 Difference]: Finished difference Result 56152 states and 177994 transitions. [2021-06-05 13:53:55,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 13:53:55,977 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 13:53:55,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:56,085 INFO L225 Difference]: With dead ends: 56152 [2021-06-05 13:53:56,085 INFO L226 Difference]: Without dead ends: 56142 [2021-06-05 13:53:56,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2161 ImplicationChecksByTransitivity, 1027.0ms TimeCoverageRelationStatistics Valid=2618, Invalid=5572, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 13:53:56,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56142 states. [2021-06-05 13:53:57,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56142 to 51019. [2021-06-05 13:53:57,075 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 13:53:57,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51019 states to 51019 states and 163916 transitions. [2021-06-05 13:53:57,208 INFO L78 Accepts]: Start accepts. Automaton has 51019 states and 163916 transitions. Word has length 26 [2021-06-05 13:53:57,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:57,208 INFO L482 AbstractCegarLoop]: Abstraction has 51019 states and 163916 transitions. [2021-06-05 13:53:57,208 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 13:53:57,208 INFO L276 IsEmpty]: Start isEmpty. Operand 51019 states and 163916 transitions. [2021-06-05 13:53:57,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:53:57,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:57,276 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:57,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 587 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1028 [2021-06-05 13:53:57,477 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:57,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:57,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1666962383, now seen corresponding path program 584 times [2021-06-05 13:53:57,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:57,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816958518] [2021-06-05 13:53:57,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:57,536 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 13:53:57,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:57,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816958518] [2021-06-05 13:53:57,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816958518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:57,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624300426] [2021-06-05 13:53:57,536 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 13:53:57,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:53:57,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:57,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:53:57,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:57,814 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 13:53:57,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624300426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:57,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:57,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-06-05 13:53:57,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890378745] [2021-06-05 13:53:57,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:53:57,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:57,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:53:57,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:53:57,815 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 13:53:59,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:59,232 INFO L93 Difference]: Finished difference Result 57976 states and 183349 transitions. [2021-06-05 13:53:59,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 13:53:59,233 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 13:53:59,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:59,370 INFO L225 Difference]: With dead ends: 57976 [2021-06-05 13:53:59,370 INFO L226 Difference]: Without dead ends: 57972 [2021-06-05 13:53:59,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2639 ImplicationChecksByTransitivity, 971.2ms TimeCoverageRelationStatistics Valid=3212, Invalid=6490, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 13:53:59,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57972 states. [2021-06-05 13:54:00,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57972 to 51503. [2021-06-05 13:54:00,437 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 13:54:00,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51503 states to 51503 states and 165414 transitions. [2021-06-05 13:54:00,766 INFO L78 Accepts]: Start accepts. Automaton has 51503 states and 165414 transitions. Word has length 26 [2021-06-05 13:54:00,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:00,766 INFO L482 AbstractCegarLoop]: Abstraction has 51503 states and 165414 transitions. [2021-06-05 13:54:00,766 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 13:54:00,766 INFO L276 IsEmpty]: Start isEmpty. Operand 51503 states and 165414 transitions. [2021-06-05 13:54:00,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:54:00,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:00,837 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:01,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1029,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:01,037 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:01,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:01,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1784219049, now seen corresponding path program 585 times [2021-06-05 13:54:01,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:01,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638579630] [2021-06-05 13:54:01,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:01,099 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 13:54:01,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:01,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638579630] [2021-06-05 13:54:01,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638579630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:01,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000800201] [2021-06-05 13:54:01,099 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 13:54:01,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 13:54:01,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:01,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:54:01,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:01,249 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 13:54:01,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000800201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:01,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:01,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-06-05 13:54:01,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276398165] [2021-06-05 13:54:01,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:54:01,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:01,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:54:01,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:54:01,250 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 13:54:02,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:02,592 INFO L93 Difference]: Finished difference Result 58507 states and 185313 transitions. [2021-06-05 13:54:02,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 13:54:02,592 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 13:54:02,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:02,720 INFO L225 Difference]: With dead ends: 58507 [2021-06-05 13:54:02,720 INFO L226 Difference]: Without dead ends: 58507 [2021-06-05 13:54:02,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2493 ImplicationChecksByTransitivity, 918.8ms TimeCoverageRelationStatistics Valid=3241, Invalid=6071, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 13:54:02,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58507 states. [2021-06-05 13:54:03,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58507 to 51747. [2021-06-05 13:54:03,766 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 13:54:04,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51747 states to 51747 states and 166498 transitions. [2021-06-05 13:54:04,095 INFO L78 Accepts]: Start accepts. Automaton has 51747 states and 166498 transitions. Word has length 26 [2021-06-05 13:54:04,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:04,095 INFO L482 AbstractCegarLoop]: Abstraction has 51747 states and 166498 transitions. [2021-06-05 13:54:04,095 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 13:54:04,095 INFO L276 IsEmpty]: Start isEmpty. Operand 51747 states and 166498 transitions. [2021-06-05 13:54:04,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:54:04,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:04,167 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:04,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1030,589 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:04,368 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:04,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:04,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1212764243, now seen corresponding path program 586 times [2021-06-05 13:54:04,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:04,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686635623] [2021-06-05 13:54:04,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:04,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:04,429 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 13:54:04,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:04,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686635623] [2021-06-05 13:54:04,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686635623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:04,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785367923] [2021-06-05 13:54:04,429 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 13:54:04,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:04,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:04,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:54:04,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:04,580 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 13:54:04,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785367923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:04,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:04,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-06-05 13:54:04,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986053520] [2021-06-05 13:54:04,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:54:04,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:04,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:54:04,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:54:04,581 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 13:54:06,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:06,080 INFO L93 Difference]: Finished difference Result 55635 states and 176710 transitions. [2021-06-05 13:54:06,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 13:54:06,081 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 13:54:06,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:06,375 INFO L225 Difference]: With dead ends: 55635 [2021-06-05 13:54:06,375 INFO L226 Difference]: Without dead ends: 55620 [2021-06-05 13:54:06,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3718 ImplicationChecksByTransitivity, 1118.0ms TimeCoverageRelationStatistics Valid=4143, Invalid=8967, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 13:54:06,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55620 states. [2021-06-05 13:54:07,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55620 to 50933. [2021-06-05 13:54:07,372 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 13:54:07,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50933 states to 50933 states and 163692 transitions. [2021-06-05 13:54:07,510 INFO L78 Accepts]: Start accepts. Automaton has 50933 states and 163692 transitions. Word has length 26 [2021-06-05 13:54:07,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:07,510 INFO L482 AbstractCegarLoop]: Abstraction has 50933 states and 163692 transitions. [2021-06-05 13:54:07,510 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 13:54:07,510 INFO L276 IsEmpty]: Start isEmpty. Operand 50933 states and 163692 transitions. [2021-06-05 13:54:07,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:54:07,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:07,583 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:07,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1031 [2021-06-05 13:54:07,784 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:07,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:07,784 INFO L82 PathProgramCache]: Analyzing trace with hash -677534441, now seen corresponding path program 587 times [2021-06-05 13:54:07,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:07,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365629344] [2021-06-05 13:54:07,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:07,851 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 13:54:07,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:07,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365629344] [2021-06-05 13:54:07,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365629344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:07,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673823347] [2021-06-05 13:54:07,851 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 13:54:07,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 13:54:07,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:07,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:54:07,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:08,010 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 13:54:08,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673823347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:08,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:08,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 26 [2021-06-05 13:54:08,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303357560] [2021-06-05 13:54:08,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:54:08,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:08,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:54:08,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:54:08,011 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 13:54:09,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:09,641 INFO L93 Difference]: Finished difference Result 55063 states and 174795 transitions. [2021-06-05 13:54:09,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 13:54:09,641 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 13:54:09,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:09,766 INFO L225 Difference]: With dead ends: 55063 [2021-06-05 13:54:09,766 INFO L226 Difference]: Without dead ends: 55033 [2021-06-05 13:54:09,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3799 ImplicationChecksByTransitivity, 1136.9ms TimeCoverageRelationStatistics Valid=4019, Invalid=8863, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 13:54:09,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55033 states. [2021-06-05 13:54:10,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55033 to 50491. [2021-06-05 13:54:10,747 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 13:54:10,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50491 states to 50491 states and 162375 transitions. [2021-06-05 13:54:10,863 INFO L78 Accepts]: Start accepts. Automaton has 50491 states and 162375 transitions. Word has length 26 [2021-06-05 13:54:10,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:10,863 INFO L482 AbstractCegarLoop]: Abstraction has 50491 states and 162375 transitions. [2021-06-05 13:54:10,863 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 13:54:10,863 INFO L276 IsEmpty]: Start isEmpty. Operand 50491 states and 162375 transitions. [2021-06-05 13:54:10,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:54:10,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:10,929 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:11,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1032,591 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:11,130 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:11,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:11,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1265279763, now seen corresponding path program 588 times [2021-06-05 13:54:11,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:11,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366608232] [2021-06-05 13:54:11,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:11,204 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 13:54:11,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:11,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366608232] [2021-06-05 13:54:11,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366608232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:11,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467120321] [2021-06-05 13:54:11,204 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 13:54:11,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 13:54:11,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:11,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:54:11,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:11,365 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 13:54:11,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467120321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:11,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:11,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2021-06-05 13:54:11,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599384044] [2021-06-05 13:54:11,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 13:54:11,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:11,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 13:54:11,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:54:11,366 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 13:54:12,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:12,947 INFO L93 Difference]: Finished difference Result 54247 states and 172494 transitions. [2021-06-05 13:54:12,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-05 13:54:12,947 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 13:54:12,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:13,061 INFO L225 Difference]: With dead ends: 54247 [2021-06-05 13:54:13,061 INFO L226 Difference]: Without dead ends: 54229 [2021-06-05 13:54:13,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3930 ImplicationChecksByTransitivity, 994.1ms TimeCoverageRelationStatistics Valid=4022, Invalid=8860, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 13:54:13,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54229 states. [2021-06-05 13:54:13,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54229 to 50570. [2021-06-05 13:54:14,028 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 13:54:14,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50570 states to 50570 states and 162641 transitions. [2021-06-05 13:54:14,168 INFO L78 Accepts]: Start accepts. Automaton has 50570 states and 162641 transitions. Word has length 26 [2021-06-05 13:54:14,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:14,168 INFO L482 AbstractCegarLoop]: Abstraction has 50570 states and 162641 transitions. [2021-06-05 13:54:14,168 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 13:54:14,168 INFO L276 IsEmpty]: Start isEmpty. Operand 50570 states and 162641 transitions. [2021-06-05 13:54:14,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:54:14,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:14,241 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:14,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 592 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1033 [2021-06-05 13:54:14,442 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:14,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:14,442 INFO L82 PathProgramCache]: Analyzing trace with hash 430328203, now seen corresponding path program 589 times [2021-06-05 13:54:14,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:14,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843798967] [2021-06-05 13:54:14,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:14,518 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 13:54:14,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:14,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843798967] [2021-06-05 13:54:14,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843798967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:14,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597317277] [2021-06-05 13:54:14,518 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 13:54:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:14,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:54:14,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:14,690 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 13:54:14,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597317277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:14,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:14,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-06-05 13:54:14,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681082212] [2021-06-05 13:54:14,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:54:14,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:14,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:54:14,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:54:14,690 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 13:54:15,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:15,845 INFO L93 Difference]: Finished difference Result 54132 states and 172702 transitions. [2021-06-05 13:54:15,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 13:54:15,846 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 13:54:15,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:16,187 INFO L225 Difference]: With dead ends: 54132 [2021-06-05 13:54:16,187 INFO L226 Difference]: Without dead ends: 54132 [2021-06-05 13:54:16,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 814.1ms TimeCoverageRelationStatistics Valid=2323, Invalid=5333, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 13:54:16,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54132 states. [2021-06-05 13:54:17,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54132 to 50382. [2021-06-05 13:54:17,187 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 13:54:17,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50382 states to 50382 states and 162076 transitions. [2021-06-05 13:54:17,339 INFO L78 Accepts]: Start accepts. Automaton has 50382 states and 162076 transitions. Word has length 26 [2021-06-05 13:54:17,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:17,339 INFO L482 AbstractCegarLoop]: Abstraction has 50382 states and 162076 transitions. [2021-06-05 13:54:17,339 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 13:54:17,339 INFO L276 IsEmpty]: Start isEmpty. Operand 50382 states and 162076 transitions. [2021-06-05 13:54:17,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:54:17,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:17,417 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:17,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 593 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1034 [2021-06-05 13:54:17,645 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:17,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:17,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1898584181, now seen corresponding path program 590 times [2021-06-05 13:54:17,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:17,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52490058] [2021-06-05 13:54:17,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:17,718 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 13:54:17,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:17,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52490058] [2021-06-05 13:54:17,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52490058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:17,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773416714] [2021-06-05 13:54:17,718 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 13:54:17,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:17,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:17,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:54:17,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:17,884 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 13:54:17,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773416714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:17,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:17,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 27 [2021-06-05 13:54:17,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611505391] [2021-06-05 13:54:17,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 13:54:17,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:17,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 13:54:17,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:54:17,884 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 13:54:18,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:18,952 INFO L93 Difference]: Finished difference Result 53723 states and 171238 transitions. [2021-06-05 13:54:18,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 13:54:18,953 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 13:54:18,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:19,066 INFO L225 Difference]: With dead ends: 53723 [2021-06-05 13:54:19,067 INFO L226 Difference]: Without dead ends: 53705 [2021-06-05 13:54:19,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1875 ImplicationChecksByTransitivity, 731.8ms TimeCoverageRelationStatistics Valid=1864, Invalid=4456, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 13:54:19,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53705 states. [2021-06-05 13:54:19,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53705 to 50224. [2021-06-05 13:54:20,032 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 13:54:20,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50224 states to 50224 states and 161599 transitions. [2021-06-05 13:54:20,372 INFO L78 Accepts]: Start accepts. Automaton has 50224 states and 161599 transitions. Word has length 26 [2021-06-05 13:54:20,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:20,372 INFO L482 AbstractCegarLoop]: Abstraction has 50224 states and 161599 transitions. [2021-06-05 13:54:20,372 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 13:54:20,372 INFO L276 IsEmpty]: Start isEmpty. Operand 50224 states and 161599 transitions. [2021-06-05 13:54:20,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:54:20,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:20,445 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:20,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 594 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1035 [2021-06-05 13:54:20,664 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:20,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:20,664 INFO L82 PathProgramCache]: Analyzing trace with hash 104499595, now seen corresponding path program 591 times [2021-06-05 13:54:20,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:20,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809721803] [2021-06-05 13:54:20,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:20,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:20,723 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 13:54:20,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:20,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809721803] [2021-06-05 13:54:20,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809721803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:20,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229710129] [2021-06-05 13:54:20,724 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 13:54:20,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:54:20,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:20,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:54:20,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:20,889 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 13:54:20,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229710129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:20,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:20,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 26 [2021-06-05 13:54:20,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151169370] [2021-06-05 13:54:20,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:54:20,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:20,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:54:20,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:54:20,889 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 13:54:21,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:21,997 INFO L93 Difference]: Finished difference Result 54073 states and 172024 transitions. [2021-06-05 13:54:22,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 13:54:22,001 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 13:54:22,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:22,123 INFO L225 Difference]: With dead ends: 54073 [2021-06-05 13:54:22,123 INFO L226 Difference]: Without dead ends: 54059 [2021-06-05 13:54:22,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1904 ImplicationChecksByTransitivity, 766.3ms TimeCoverageRelationStatistics Valid=1950, Invalid=4530, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 13:54:22,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54059 states. [2021-06-05 13:54:23,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54059 to 50167. [2021-06-05 13:54:23,061 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 13:54:23,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50167 states to 50167 states and 161403 transitions. [2021-06-05 13:54:23,191 INFO L78 Accepts]: Start accepts. Automaton has 50167 states and 161403 transitions. Word has length 26 [2021-06-05 13:54:23,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:23,191 INFO L482 AbstractCegarLoop]: Abstraction has 50167 states and 161403 transitions. [2021-06-05 13:54:23,191 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 13:54:23,191 INFO L276 IsEmpty]: Start isEmpty. Operand 50167 states and 161403 transitions. [2021-06-05 13:54:23,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:54:23,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:23,261 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:23,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 595 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1036 [2021-06-05 13:54:23,462 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:23,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:23,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1632000117, now seen corresponding path program 592 times [2021-06-05 13:54:23,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:23,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693307795] [2021-06-05 13:54:23,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:23,514 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 13:54:23,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:23,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693307795] [2021-06-05 13:54:23,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693307795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:23,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936807908] [2021-06-05 13:54:23,515 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 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 13:54:23,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:23,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:23,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:54:23,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:23,671 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 13:54:23,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936807908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:23,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:23,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 25 [2021-06-05 13:54:23,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555777923] [2021-06-05 13:54:23,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:54:23,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:23,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:54:23,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:54:23,672 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 13:54:25,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:25,007 INFO L93 Difference]: Finished difference Result 56139 states and 177968 transitions. [2021-06-05 13:54:25,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 13:54:25,008 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 13:54:25,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:25,137 INFO L225 Difference]: With dead ends: 56139 [2021-06-05 13:54:25,138 INFO L226 Difference]: Without dead ends: 56129 [2021-06-05 13:54:25,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 838.1ms TimeCoverageRelationStatistics Valid=2181, Invalid=4791, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 13:54:25,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56129 states. [2021-06-05 13:54:26,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56129 to 50617. [2021-06-05 13:54:26,105 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 13:54:26,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50617 states to 50617 states and 162764 transitions. [2021-06-05 13:54:26,239 INFO L78 Accepts]: Start accepts. Automaton has 50617 states and 162764 transitions. Word has length 26 [2021-06-05 13:54:26,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:26,239 INFO L482 AbstractCegarLoop]: Abstraction has 50617 states and 162764 transitions. [2021-06-05 13:54:26,239 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 13:54:26,240 INFO L276 IsEmpty]: Start isEmpty. Operand 50617 states and 162764 transitions. [2021-06-05 13:54:26,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:54:26,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:26,311 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:26,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 596 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1037 [2021-06-05 13:54:26,512 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:26,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:26,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1965110901, now seen corresponding path program 593 times [2021-06-05 13:54:26,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:26,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315397020] [2021-06-05 13:54:26,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:26,566 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 13:54:26,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:26,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315397020] [2021-06-05 13:54:26,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315397020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:26,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360060759] [2021-06-05 13:54:26,566 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 13:54:26,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:54:26,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:26,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:54:26,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:26,724 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 13:54:26,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360060759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:26,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:26,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 25 [2021-06-05 13:54:26,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689347792] [2021-06-05 13:54:26,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:54:26,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:26,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:54:26,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:54:26,725 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 13:54:28,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:28,050 INFO L93 Difference]: Finished difference Result 56110 states and 178059 transitions. [2021-06-05 13:54:28,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 13:54:28,051 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 13:54:28,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:28,163 INFO L225 Difference]: With dead ends: 56110 [2021-06-05 13:54:28,163 INFO L226 Difference]: Without dead ends: 56100 [2021-06-05 13:54:28,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 968.0ms TimeCoverageRelationStatistics Valid=2319, Invalid=4821, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 13:54:28,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56100 states. [2021-06-05 13:54:29,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56100 to 51005. [2021-06-05 13:54:29,140 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 13:54:29,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51005 states to 51005 states and 163982 transitions. [2021-06-05 13:54:29,265 INFO L78 Accepts]: Start accepts. Automaton has 51005 states and 163982 transitions. Word has length 26 [2021-06-05 13:54:29,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:29,265 INFO L482 AbstractCegarLoop]: Abstraction has 51005 states and 163982 transitions. [2021-06-05 13:54:29,266 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 13:54:29,266 INFO L276 IsEmpty]: Start isEmpty. Operand 51005 states and 163982 transitions. [2021-06-05 13:54:29,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:54:29,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:29,324 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:29,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1038 [2021-06-05 13:54:29,525 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:29,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:29,525 INFO L82 PathProgramCache]: Analyzing trace with hash -728930421, now seen corresponding path program 594 times [2021-06-05 13:54:29,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:29,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089633945] [2021-06-05 13:54:29,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:29,580 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 13:54:29,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:29,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089633945] [2021-06-05 13:54:29,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089633945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:29,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497712374] [2021-06-05 13:54:29,580 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 13:54:29,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:54:29,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:29,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:54:29,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:29,736 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 13:54:29,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497712374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:29,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:29,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 25 [2021-06-05 13:54:29,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211311376] [2021-06-05 13:54:29,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:54:29,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:29,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:54:29,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:54:29,737 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 13:54:30,653 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2021-06-05 13:54:31,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:31,239 INFO L93 Difference]: Finished difference Result 58128 states and 183935 transitions. [2021-06-05 13:54:31,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 13:54:31,239 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 13:54:31,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:31,365 INFO L225 Difference]: With dead ends: 58128 [2021-06-05 13:54:31,365 INFO L226 Difference]: Without dead ends: 58124 [2021-06-05 13:54:31,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2371 ImplicationChecksByTransitivity, 1080.7ms TimeCoverageRelationStatistics Valid=2966, Invalid=5964, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 13:54:31,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58124 states. [2021-06-05 13:54:32,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58124 to 51428. [2021-06-05 13:54:32,395 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 13:54:32,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51428 states to 51428 states and 165351 transitions. [2021-06-05 13:54:32,526 INFO L78 Accepts]: Start accepts. Automaton has 51428 states and 165351 transitions. Word has length 26 [2021-06-05 13:54:32,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:32,526 INFO L482 AbstractCegarLoop]: Abstraction has 51428 states and 165351 transitions. [2021-06-05 13:54:32,526 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 13:54:32,526 INFO L276 IsEmpty]: Start isEmpty. Operand 51428 states and 165351 transitions. [2021-06-05 13:54:32,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:54:32,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:32,597 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:32,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1039,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:32,797 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:32,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:32,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1804798347, now seen corresponding path program 595 times [2021-06-05 13:54:32,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:32,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014548370] [2021-06-05 13:54:32,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:32,852 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 13:54:32,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:32,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014548370] [2021-06-05 13:54:32,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014548370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:32,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429941581] [2021-06-05 13:54:32,853 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 13:54:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:32,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:54:32,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:33,007 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 13:54:33,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429941581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:33,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:33,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 25 [2021-06-05 13:54:33,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134877013] [2021-06-05 13:54:33,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:54:33,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:33,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:54:33,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:54:33,008 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 13:54:34,005 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2021-06-05 13:54:34,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:34,537 INFO L93 Difference]: Finished difference Result 58986 states and 186645 transitions. [2021-06-05 13:54:34,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 13:54:34,537 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 13:54:34,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:34,648 INFO L225 Difference]: With dead ends: 58986 [2021-06-05 13:54:34,648 INFO L226 Difference]: Without dead ends: 58986 [2021-06-05 13:54:34,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2386 ImplicationChecksByTransitivity, 1102.9ms TimeCoverageRelationStatistics Valid=3114, Invalid=5816, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 13:54:34,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58986 states. [2021-06-05 13:54:35,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58986 to 51291. [2021-06-05 13:54:35,690 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 13:54:35,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51291 states to 51291 states and 165186 transitions. [2021-06-05 13:54:35,824 INFO L78 Accepts]: Start accepts. Automaton has 51291 states and 165186 transitions. Word has length 26 [2021-06-05 13:54:35,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:35,824 INFO L482 AbstractCegarLoop]: Abstraction has 51291 states and 165186 transitions. [2021-06-05 13:54:35,824 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 13:54:35,824 INFO L276 IsEmpty]: Start isEmpty. Operand 51291 states and 165186 transitions. [2021-06-05 13:54:35,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:54:35,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:35,882 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:36,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1040,599 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:36,083 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:36,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:36,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1918714143, now seen corresponding path program 596 times [2021-06-05 13:54:36,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:36,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988450717] [2021-06-05 13:54:36,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:36,138 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 13:54:36,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:36,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988450717] [2021-06-05 13:54:36,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988450717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:36,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12380731] [2021-06-05 13:54:36,139 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 13:54:36,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:36,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:36,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:54:36,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:36,300 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 13:54:36,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12380731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:36,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:36,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 25 [2021-06-05 13:54:36,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58859423] [2021-06-05 13:54:36,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:54:36,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:36,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:54:36,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:54:36,301 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 13:54:37,343 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 9 [2021-06-05 13:54:38,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:38,033 INFO L93 Difference]: Finished difference Result 56236 states and 178388 transitions. [2021-06-05 13:54:38,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-05 13:54:38,034 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 13:54:38,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:38,170 INFO L225 Difference]: With dead ends: 56236 [2021-06-05 13:54:38,170 INFO L226 Difference]: Without dead ends: 56224 [2021-06-05 13:54:38,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 1367.8ms TimeCoverageRelationStatistics Valid=4352, Invalid=9928, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 13:54:38,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56224 states. [2021-06-05 13:54:39,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56224 to 50695. [2021-06-05 13:54:39,154 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 13:54:39,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50695 states to 50695 states and 163157 transitions. [2021-06-05 13:54:39,291 INFO L78 Accepts]: Start accepts. Automaton has 50695 states and 163157 transitions. Word has length 26 [2021-06-05 13:54:39,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:39,291 INFO L482 AbstractCegarLoop]: Abstraction has 50695 states and 163157 transitions. [2021-06-05 13:54:39,291 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 13:54:39,291 INFO L276 IsEmpty]: Start isEmpty. Operand 50695 states and 163157 transitions. [2021-06-05 13:54:39,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:54:39,361 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:39,361 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:39,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1041,600 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:39,562 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:39,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:39,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1383484341, now seen corresponding path program 597 times [2021-06-05 13:54:39,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:39,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955390671] [2021-06-05 13:54:39,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:39,624 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 13:54:39,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:39,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955390671] [2021-06-05 13:54:39,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955390671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:39,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412758952] [2021-06-05 13:54:39,625 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 13:54:39,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:54:39,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:39,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:54:39,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:39,787 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 13:54:39,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412758952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:39,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:39,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 26 [2021-06-05 13:54:39,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237158678] [2021-06-05 13:54:39,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:54:39,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:39,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:54:39,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:54:39,788 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 13:54:41,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:41,467 INFO L93 Difference]: Finished difference Result 55825 states and 177005 transitions. [2021-06-05 13:54:41,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 13:54:41,468 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 13:54:41,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:41,590 INFO L225 Difference]: With dead ends: 55825 [2021-06-05 13:54:41,591 INFO L226 Difference]: Without dead ends: 55807 [2021-06-05 13:54:41,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4107 ImplicationChecksByTransitivity, 1306.6ms TimeCoverageRelationStatistics Valid=4043, Invalid=9529, Unknown=0, NotChecked=0, Total=13572 [2021-06-05 13:54:41,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55807 states. [2021-06-05 13:54:42,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55807 to 50449. [2021-06-05 13:54:42,554 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 13:54:42,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50449 states to 50449 states and 162397 transitions. [2021-06-05 13:54:42,681 INFO L78 Accepts]: Start accepts. Automaton has 50449 states and 162397 transitions. Word has length 26 [2021-06-05 13:54:42,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:42,681 INFO L482 AbstractCegarLoop]: Abstraction has 50449 states and 162397 transitions. [2021-06-05 13:54:42,681 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 13:54:42,681 INFO L276 IsEmpty]: Start isEmpty. Operand 50449 states and 162397 transitions. [2021-06-05 13:54:42,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:54:42,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:42,749 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:42,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,601 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:42,950 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:42,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:42,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1971229663, now seen corresponding path program 598 times [2021-06-05 13:54:42,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:42,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061610644] [2021-06-05 13:54:42,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:43,020 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 13:54:43,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:43,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061610644] [2021-06-05 13:54:43,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061610644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:43,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384216392] [2021-06-05 13:54:43,021 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 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 13:54:43,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:43,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:43,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:54:43,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:43,188 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 13:54:43,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384216392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:43,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:43,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 27 [2021-06-05 13:54:43,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676849946] [2021-06-05 13:54:43,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 13:54:43,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:43,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 13:54:43,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:54:43,189 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 13:54:44,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:44,807 INFO L93 Difference]: Finished difference Result 55794 states and 176942 transitions. [2021-06-05 13:54:44,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 13:54:44,808 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 13:54:44,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:44,930 INFO L225 Difference]: With dead ends: 55794 [2021-06-05 13:54:44,930 INFO L226 Difference]: Without dead ends: 55758 [2021-06-05 13:54:44,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4084 ImplicationChecksByTransitivity, 1123.0ms TimeCoverageRelationStatistics Valid=3869, Invalid=9241, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 13:54:44,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55758 states. [2021-06-05 13:54:45,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55758 to 50138. [2021-06-05 13:54:45,889 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 13:54:46,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50138 states to 50138 states and 161479 transitions. [2021-06-05 13:54:46,021 INFO L78 Accepts]: Start accepts. Automaton has 50138 states and 161479 transitions. Word has length 26 [2021-06-05 13:54:46,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:46,021 INFO L482 AbstractCegarLoop]: Abstraction has 50138 states and 161479 transitions. [2021-06-05 13:54:46,022 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 13:54:46,022 INFO L276 IsEmpty]: Start isEmpty. Operand 50138 states and 161479 transitions. [2021-06-05 13:54:46,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:54:46,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:46,089 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:46,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1043,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:46,289 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:46,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:46,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1283501835, now seen corresponding path program 599 times [2021-06-05 13:54:46,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:46,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182922315] [2021-06-05 13:54:46,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:46,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:46,366 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 13:54:46,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:46,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182922315] [2021-06-05 13:54:46,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182922315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:46,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153261829] [2021-06-05 13:54:46,367 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 13:54:46,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:54:46,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:46,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:54:46,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:46,543 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 13:54:46,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153261829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:46,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:46,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-06-05 13:54:46,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659375841] [2021-06-05 13:54:46,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:54:46,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:46,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:54:46,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:54:46,544 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 13:54:47,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:47,985 INFO L93 Difference]: Finished difference Result 55028 states and 174803 transitions. [2021-06-05 13:54:47,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 13:54:47,985 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 13:54:47,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:48,103 INFO L225 Difference]: With dead ends: 55028 [2021-06-05 13:54:48,103 INFO L226 Difference]: Without dead ends: 55004 [2021-06-05 13:54:48,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4062 ImplicationChecksByTransitivity, 1166.8ms TimeCoverageRelationStatistics Valid=3820, Invalid=9062, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 13:54:48,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55004 states. [2021-06-05 13:54:49,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55004 to 50221. [2021-06-05 13:54:49,064 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 13:54:49,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50221 states to 50221 states and 161768 transitions. [2021-06-05 13:54:49,197 INFO L78 Accepts]: Start accepts. Automaton has 50221 states and 161768 transitions. Word has length 26 [2021-06-05 13:54:49,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:49,197 INFO L482 AbstractCegarLoop]: Abstraction has 50221 states and 161768 transitions. [2021-06-05 13:54:49,197 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 13:54:49,197 INFO L276 IsEmpty]: Start isEmpty. Operand 50221 states and 161768 transitions. [2021-06-05 13:54:49,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:54:49,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:49,264 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:49,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1044 [2021-06-05 13:54:49,465 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:49,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:49,465 INFO L82 PathProgramCache]: Analyzing trace with hash 2111409623, now seen corresponding path program 600 times [2021-06-05 13:54:49,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:49,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962301155] [2021-06-05 13:54:49,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:49,543 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 13:54:49,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:49,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962301155] [2021-06-05 13:54:49,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962301155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:49,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607635192] [2021-06-05 13:54:49,544 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 13:54:49,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:54:49,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:49,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:54:49,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:49,729 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 13:54:49,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607635192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:49,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:49,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-06-05 13:54:49,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724242779] [2021-06-05 13:54:49,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 13:54:49,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:49,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 13:54:49,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:54:49,730 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 13:54:51,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:51,195 INFO L93 Difference]: Finished difference Result 52222 states and 167160 transitions. [2021-06-05 13:54:51,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 13:54:51,195 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 13:54:51,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:51,281 INFO L225 Difference]: With dead ends: 52222 [2021-06-05 13:54:51,281 INFO L226 Difference]: Without dead ends: 52222 [2021-06-05 13:54:51,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2846 ImplicationChecksByTransitivity, 902.2ms TimeCoverageRelationStatistics Valid=2527, Invalid=6029, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 13:54:51,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52222 states. [2021-06-05 13:54:52,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52222 to 49954. [2021-06-05 13:54:52,219 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 13:54:52,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49954 states to 49954 states and 160961 transitions. [2021-06-05 13:54:52,353 INFO L78 Accepts]: Start accepts. Automaton has 49954 states and 160961 transitions. Word has length 26 [2021-06-05 13:54:52,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:52,353 INFO L482 AbstractCegarLoop]: Abstraction has 49954 states and 160961 transitions. [2021-06-05 13:54:52,353 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 13:54:52,353 INFO L276 IsEmpty]: Start isEmpty. Operand 49954 states and 160961 transitions. [2021-06-05 13:54:52,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:54:52,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:52,424 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:52,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1045,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:52,625 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:52,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:52,625 INFO L82 PathProgramCache]: Analyzing trace with hash -827904689, now seen corresponding path program 601 times [2021-06-05 13:54:52,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:52,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976266495] [2021-06-05 13:54:52,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:52,690 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 13:54:52,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:52,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976266495] [2021-06-05 13:54:52,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976266495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:52,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018183261] [2021-06-05 13:54:52,691 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 13:54:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:52,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:54:52,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:52,866 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 13:54:52,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018183261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:52,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:52,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-06-05 13:54:52,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763326215] [2021-06-05 13:54:52,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:54:52,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:52,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:54:52,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:54:52,867 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 13:54:54,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:54,009 INFO L93 Difference]: Finished difference Result 51699 states and 165336 transitions. [2021-06-05 13:54:54,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 13:54:54,009 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 13:54:54,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:54,123 INFO L225 Difference]: With dead ends: 51699 [2021-06-05 13:54:54,124 INFO L226 Difference]: Without dead ends: 51681 [2021-06-05 13:54:54,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2167 ImplicationChecksByTransitivity, 805.4ms TimeCoverageRelationStatistics Valid=2039, Invalid=5101, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 13:54:54,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51681 states. [2021-06-05 13:54:54,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51681 to 49643. [2021-06-05 13:54:55,043 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 13:54:55,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49643 states to 49643 states and 159941 transitions. [2021-06-05 13:54:55,176 INFO L78 Accepts]: Start accepts. Automaton has 49643 states and 159941 transitions. Word has length 26 [2021-06-05 13:54:55,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:55,176 INFO L482 AbstractCegarLoop]: Abstraction has 49643 states and 159941 transitions. [2021-06-05 13:54:55,176 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 13:54:55,176 INFO L276 IsEmpty]: Start isEmpty. Operand 49643 states and 159941 transitions. [2021-06-05 13:54:55,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:54:55,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:55,446 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:55,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 605 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1046 [2021-06-05 13:54:55,653 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:55,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:55,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1986772695, now seen corresponding path program 602 times [2021-06-05 13:54:55,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:55,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010331010] [2021-06-05 13:54:55,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:55,718 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 13:54:55,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:55,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010331010] [2021-06-05 13:54:55,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010331010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:55,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288363940] [2021-06-05 13:54:55,719 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 13:54:55,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:55,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:55,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:54:55,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:55,904 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 13:54:55,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288363940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:55,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:55,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-06-05 13:54:55,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893279957] [2021-06-05 13:54:55,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 13:54:55,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:55,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 13:54:55,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:54:55,905 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 13:54:57,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:57,040 INFO L93 Difference]: Finished difference Result 52977 states and 168722 transitions. [2021-06-05 13:54:57,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 13:54:57,040 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 13:54:57,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:57,163 INFO L225 Difference]: With dead ends: 52977 [2021-06-05 13:54:57,163 INFO L226 Difference]: Without dead ends: 52963 [2021-06-05 13:54:57,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2098 ImplicationChecksByTransitivity, 804.7ms TimeCoverageRelationStatistics Valid=2097, Invalid=5043, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 13:54:57,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52963 states. [2021-06-05 13:54:58,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52963 to 49369. [2021-06-05 13:54:58,131 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 13:54:58,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49369 states to 49369 states and 159049 transitions. [2021-06-05 13:54:58,259 INFO L78 Accepts]: Start accepts. Automaton has 49369 states and 159049 transitions. Word has length 26 [2021-06-05 13:54:58,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:58,259 INFO L482 AbstractCegarLoop]: Abstraction has 49369 states and 159049 transitions. [2021-06-05 13:54:58,259 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 13:54:58,259 INFO L276 IsEmpty]: Start isEmpty. Operand 49369 states and 159049 transitions. [2021-06-05 13:54:58,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:54:58,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:58,318 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:58,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 606 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1047 [2021-06-05 13:54:58,519 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:58,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:58,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1384832079, now seen corresponding path program 603 times [2021-06-05 13:54:58,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:58,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611100054] [2021-06-05 13:54:58,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:58,571 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 13:54:58,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:58,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611100054] [2021-06-05 13:54:58,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611100054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:58,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594847269] [2021-06-05 13:54:58,571 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 13:54:58,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:54:58,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:58,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:54:58,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:58,737 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 13:54:58,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594847269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:58,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:58,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2021-06-05 13:54:58,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426418321] [2021-06-05 13:54:58,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:54:58,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:58,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:54:58,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:54:58,737 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 13:54:59,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:59,995 INFO L93 Difference]: Finished difference Result 54852 states and 174029 transitions. [2021-06-05 13:54:59,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 13:54:59,995 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 13:54:59,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:00,115 INFO L225 Difference]: With dead ends: 54852 [2021-06-05 13:55:00,115 INFO L226 Difference]: Without dead ends: 54842 [2021-06-05 13:55:00,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2097 ImplicationChecksByTransitivity, 901.6ms TimeCoverageRelationStatistics Valid=2236, Invalid=5074, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 13:55:00,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54842 states. [2021-06-05 13:55:00,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54842 to 49154. [2021-06-05 13:55:01,045 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 13:55:01,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49154 states to 49154 states and 158330 transitions. [2021-06-05 13:55:01,158 INFO L78 Accepts]: Start accepts. Automaton has 49154 states and 158330 transitions. Word has length 26 [2021-06-05 13:55:01,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:01,158 INFO L482 AbstractCegarLoop]: Abstraction has 49154 states and 158330 transitions. [2021-06-05 13:55:01,158 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 13:55:01,158 INFO L276 IsEmpty]: Start isEmpty. Operand 49154 states and 158330 transitions. [2021-06-05 13:55:01,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:55:01,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:01,215 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:01,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1048 [2021-06-05 13:55:01,415 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:01,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:01,415 INFO L82 PathProgramCache]: Analyzing trace with hash 534130647, now seen corresponding path program 604 times [2021-06-05 13:55:01,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:01,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758257606] [2021-06-05 13:55:01,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:01,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:01,463 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 13:55:01,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:01,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758257606] [2021-06-05 13:55:01,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758257606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:01,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601043423] [2021-06-05 13:55:01,463 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 13:55:01,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:01,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:01,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:55:01,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:01,622 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 13:55:01,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601043423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:01,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:01,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 25 [2021-06-05 13:55:01,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768621172] [2021-06-05 13:55:01,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:55:01,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:01,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:55:01,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:55:01,623 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 13:55:03,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:03,039 INFO L93 Difference]: Finished difference Result 58722 states and 185803 transitions. [2021-06-05 13:55:03,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 13:55:03,039 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 13:55:03,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:03,149 INFO L225 Difference]: With dead ends: 58722 [2021-06-05 13:55:03,149 INFO L226 Difference]: Without dead ends: 58716 [2021-06-05 13:55:03,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2087 ImplicationChecksByTransitivity, 843.8ms TimeCoverageRelationStatistics Valid=2457, Invalid=5199, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 13:55:03,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58716 states. [2021-06-05 13:55:04,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58716 to 50390. [2021-06-05 13:55:04,158 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 13:55:04,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50390 states to 50390 states and 162255 transitions. [2021-06-05 13:55:04,291 INFO L78 Accepts]: Start accepts. Automaton has 50390 states and 162255 transitions. Word has length 26 [2021-06-05 13:55:04,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:04,291 INFO L482 AbstractCegarLoop]: Abstraction has 50390 states and 162255 transitions. [2021-06-05 13:55:04,291 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 13:55:04,291 INFO L276 IsEmpty]: Start isEmpty. Operand 50390 states and 162255 transitions. [2021-06-05 13:55:04,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:55:04,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:04,360 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:04,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1049,608 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:04,561 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:04,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:04,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1987163313, now seen corresponding path program 605 times [2021-06-05 13:55:04,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:04,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863224671] [2021-06-05 13:55:04,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:04,610 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 13:55:04,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:04,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863224671] [2021-06-05 13:55:04,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863224671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:04,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606357978] [2021-06-05 13:55:04,610 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 13:55:04,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:55:04,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:04,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:55:04,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:04,767 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 13:55:04,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606357978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:04,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:04,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 25 [2021-06-05 13:55:04,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551717651] [2021-06-05 13:55:04,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:55:04,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:04,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:55:04,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:55:04,768 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 13:55:06,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:06,313 INFO L93 Difference]: Finished difference Result 56725 states and 179818 transitions. [2021-06-05 13:55:06,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 13:55:06,314 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 13:55:06,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:06,442 INFO L225 Difference]: With dead ends: 56725 [2021-06-05 13:55:06,442 INFO L226 Difference]: Without dead ends: 56721 [2021-06-05 13:55:06,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2166 ImplicationChecksByTransitivity, 959.1ms TimeCoverageRelationStatistics Valid=2734, Invalid=5456, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 13:55:06,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56721 states. [2021-06-05 13:55:07,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56721 to 50555. [2021-06-05 13:55:07,478 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 13:55:07,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50555 states to 50555 states and 162788 transitions. [2021-06-05 13:55:07,612 INFO L78 Accepts]: Start accepts. Automaton has 50555 states and 162788 transitions. Word has length 26 [2021-06-05 13:55:07,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:07,612 INFO L482 AbstractCegarLoop]: Abstraction has 50555 states and 162788 transitions. [2021-06-05 13:55:07,612 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 13:55:07,612 INFO L276 IsEmpty]: Start isEmpty. Operand 50555 states and 162788 transitions. [2021-06-05 13:55:07,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:55:07,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:07,683 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:07,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1050 [2021-06-05 13:55:07,899 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:07,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:07,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1395187927, now seen corresponding path program 606 times [2021-06-05 13:55:07,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:07,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103190047] [2021-06-05 13:55:07,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:07,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:07,950 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 13:55:07,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:07,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103190047] [2021-06-05 13:55:07,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103190047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:07,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547244786] [2021-06-05 13:55:07,951 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 13:55:07,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:55:07,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:07,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:55:07,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:08,147 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 13:55:08,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547244786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:08,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:08,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 25 [2021-06-05 13:55:08,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129569816] [2021-06-05 13:55:08,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:55:08,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:08,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:55:08,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:55:08,148 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 13:55:09,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:09,632 INFO L93 Difference]: Finished difference Result 58603 states and 185191 transitions. [2021-06-05 13:55:09,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 13:55:09,632 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 13:55:09,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:09,746 INFO L225 Difference]: With dead ends: 58603 [2021-06-05 13:55:09,746 INFO L226 Difference]: Without dead ends: 58603 [2021-06-05 13:55:09,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2324 ImplicationChecksByTransitivity, 881.9ms TimeCoverageRelationStatistics Valid=2988, Invalid=5568, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 13:55:09,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58603 states. [2021-06-05 13:55:10,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58603 to 49525. [2021-06-05 13:55:10,722 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 13:55:10,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49525 states to 49525 states and 159729 transitions. [2021-06-05 13:55:10,857 INFO L78 Accepts]: Start accepts. Automaton has 49525 states and 159729 transitions. Word has length 26 [2021-06-05 13:55:10,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:10,857 INFO L482 AbstractCegarLoop]: Abstraction has 49525 states and 159729 transitions. [2021-06-05 13:55:10,857 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 13:55:10,857 INFO L276 IsEmpty]: Start isEmpty. Operand 49525 states and 159729 transitions. [2021-06-05 13:55:10,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:55:10,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:10,915 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:11,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1051,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:11,119 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:11,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:11,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1966642733, now seen corresponding path program 607 times [2021-06-05 13:55:11,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:11,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442070435] [2021-06-05 13:55:11,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:11,169 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 13:55:11,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:11,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442070435] [2021-06-05 13:55:11,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442070435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:11,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587747977] [2021-06-05 13:55:11,170 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 13:55:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:11,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:55:11,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:11,327 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 13:55:11,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587747977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:11,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:11,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 25 [2021-06-05 13:55:11,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045736248] [2021-06-05 13:55:11,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:55:11,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:11,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:55:11,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:55:11,328 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 13:55:13,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:13,148 INFO L93 Difference]: Finished difference Result 55764 states and 176549 transitions. [2021-06-05 13:55:13,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 13:55:13,148 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 13:55:13,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:13,255 INFO L225 Difference]: With dead ends: 55764 [2021-06-05 13:55:13,255 INFO L226 Difference]: Without dead ends: 55755 [2021-06-05 13:55:13,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5175 ImplicationChecksByTransitivity, 1276.3ms TimeCoverageRelationStatistics Valid=4713, Invalid=11289, Unknown=0, NotChecked=0, Total=16002 [2021-06-05 13:55:13,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55755 states. [2021-06-05 13:55:14,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55755 to 49339. [2021-06-05 13:55:14,208 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 13:55:14,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49339 states to 49339 states and 159074 transitions. [2021-06-05 13:55:14,348 INFO L78 Accepts]: Start accepts. Automaton has 49339 states and 159074 transitions. Word has length 26 [2021-06-05 13:55:14,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:14,348 INFO L482 AbstractCegarLoop]: Abstraction has 49339 states and 159074 transitions. [2021-06-05 13:55:14,348 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 13:55:14,349 INFO L276 IsEmpty]: Start isEmpty. Operand 49339 states and 159074 transitions. [2021-06-05 13:55:14,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:55:14,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:14,424 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:14,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1052,611 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:14,624 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:14,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:14,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1793094761, now seen corresponding path program 608 times [2021-06-05 13:55:14,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:14,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837949940] [2021-06-05 13:55:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:14,688 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 13:55:14,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:14,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837949940] [2021-06-05 13:55:14,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837949940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:14,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460647048] [2021-06-05 13:55:14,689 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 13:55:14,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:14,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:14,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:55:14,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:14,851 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 13:55:14,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460647048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:14,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:14,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2021-06-05 13:55:14,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113270148] [2021-06-05 13:55:14,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:55:14,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:14,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:55:14,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:55:14,852 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 13:55:16,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:16,630 INFO L93 Difference]: Finished difference Result 55693 states and 176306 transitions. [2021-06-05 13:55:16,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-05 13:55:16,630 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 13:55:16,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:16,740 INFO L225 Difference]: With dead ends: 55693 [2021-06-05 13:55:16,740 INFO L226 Difference]: Without dead ends: 55678 [2021-06-05 13:55:16,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4723 ImplicationChecksByTransitivity, 1248.2ms TimeCoverageRelationStatistics Valid=4224, Invalid=10538, Unknown=0, NotChecked=0, Total=14762 [2021-06-05 13:55:16,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55678 states. [2021-06-05 13:55:17,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55678 to 49042. [2021-06-05 13:55:17,712 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 13:55:17,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49042 states to 49042 states and 158098 transitions. [2021-06-05 13:55:17,851 INFO L78 Accepts]: Start accepts. Automaton has 49042 states and 158098 transitions. Word has length 26 [2021-06-05 13:55:17,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:17,851 INFO L482 AbstractCegarLoop]: Abstraction has 49042 states and 158098 transitions. [2021-06-05 13:55:17,851 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 13:55:17,851 INFO L276 IsEmpty]: Start isEmpty. Operand 49042 states and 158098 transitions. [2021-06-05 13:55:17,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:55:17,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:17,912 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:18,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1053 [2021-06-05 13:55:18,113 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:18,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:18,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1914127213, now seen corresponding path program 609 times [2021-06-05 13:55:18,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:18,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389922728] [2021-06-05 13:55:18,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:18,187 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 13:55:18,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:18,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389922728] [2021-06-05 13:55:18,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389922728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:18,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93548502] [2021-06-05 13:55:18,187 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 13:55:18,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:55:18,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:18,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:55:18,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:18,386 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 13:55:18,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93548502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:18,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:18,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-06-05 13:55:18,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169905181] [2021-06-05 13:55:18,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 13:55:18,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:18,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 13:55:18,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:55:18,387 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 13:55:20,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:20,014 INFO L93 Difference]: Finished difference Result 55641 states and 176087 transitions. [2021-06-05 13:55:20,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 13:55:20,015 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 13:55:20,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:20,343 INFO L225 Difference]: With dead ends: 55641 [2021-06-05 13:55:20,343 INFO L226 Difference]: Without dead ends: 55620 [2021-06-05 13:55:20,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4436 ImplicationChecksByTransitivity, 1291.1ms TimeCoverageRelationStatistics Valid=3872, Invalid=9934, Unknown=0, NotChecked=0, Total=13806 [2021-06-05 13:55:20,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55620 states. [2021-06-05 13:55:21,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55620 to 49000. [2021-06-05 13:55:21,058 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 13:55:21,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49000 states to 49000 states and 157937 transitions. [2021-06-05 13:55:21,380 INFO L78 Accepts]: Start accepts. Automaton has 49000 states and 157937 transitions. Word has length 26 [2021-06-05 13:55:21,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:21,380 INFO L482 AbstractCegarLoop]: Abstraction has 49000 states and 157937 transitions. [2021-06-05 13:55:21,380 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 13:55:21,380 INFO L276 IsEmpty]: Start isEmpty. Operand 49000 states and 157937 transitions. [2021-06-05 13:55:21,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:55:21,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:21,443 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:21,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1054,613 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:21,643 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:21,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:21,644 INFO L82 PathProgramCache]: Analyzing trace with hash 873891415, now seen corresponding path program 610 times [2021-06-05 13:55:21,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:21,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369100614] [2021-06-05 13:55:21,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:21,713 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 13:55:21,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:21,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369100614] [2021-06-05 13:55:21,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369100614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:21,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391543117] [2021-06-05 13:55:21,714 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 13:55:21,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:21,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:21,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:55:21,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:21,901 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 13:55:21,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391543117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:21,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:21,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-06-05 13:55:21,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696939214] [2021-06-05 13:55:21,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:55:21,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:21,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:55:21,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:55:21,902 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 13:55:23,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:23,349 INFO L93 Difference]: Finished difference Result 55859 states and 176720 transitions. [2021-06-05 13:55:23,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-05 13:55:23,349 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 13:55:23,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:23,476 INFO L225 Difference]: With dead ends: 55859 [2021-06-05 13:55:23,476 INFO L226 Difference]: Without dead ends: 55823 [2021-06-05 13:55:23,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4273 ImplicationChecksByTransitivity, 1144.4ms TimeCoverageRelationStatistics Valid=3652, Invalid=9458, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 13:55:23,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55823 states. [2021-06-05 13:55:24,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55823 to 48991. [2021-06-05 13:55:24,374 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 13:55:24,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48991 states to 48991 states and 157934 transitions. [2021-06-05 13:55:24,482 INFO L78 Accepts]: Start accepts. Automaton has 48991 states and 157934 transitions. Word has length 26 [2021-06-05 13:55:24,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:24,482 INFO L482 AbstractCegarLoop]: Abstraction has 48991 states and 157934 transitions. [2021-06-05 13:55:24,482 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 13:55:24,482 INFO L276 IsEmpty]: Start isEmpty. Operand 48991 states and 157934 transitions. [2021-06-05 13:55:24,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:55:24,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:24,709 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:24,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 614 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1055 [2021-06-05 13:55:24,925 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:24,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:24,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1308647251, now seen corresponding path program 611 times [2021-06-05 13:55:24,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:24,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835890551] [2021-06-05 13:55:24,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:25,064 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 13:55:25,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:25,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835890551] [2021-06-05 13:55:25,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835890551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:25,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179156033] [2021-06-05 13:55:25,065 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 13:55:25,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:55:25,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:25,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:55:25,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:25,274 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 13:55:25,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179156033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:25,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:25,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-06-05 13:55:25,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046807083] [2021-06-05 13:55:25,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 13:55:25,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:25,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 13:55:25,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:55:25,275 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 13:55:26,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:26,573 INFO L93 Difference]: Finished difference Result 55221 states and 174988 transitions. [2021-06-05 13:55:26,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 13:55:26,573 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 13:55:26,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:26,702 INFO L225 Difference]: With dead ends: 55221 [2021-06-05 13:55:26,702 INFO L226 Difference]: Without dead ends: 55191 [2021-06-05 13:55:26,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4097 ImplicationChecksByTransitivity, 1018.0ms TimeCoverageRelationStatistics Valid=3559, Invalid=9097, Unknown=0, NotChecked=0, Total=12656 [2021-06-05 13:55:26,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55191 states. [2021-06-05 13:55:27,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55191 to 49035. [2021-06-05 13:55:27,639 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 13:55:27,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49035 states to 49035 states and 158085 transitions. [2021-06-05 13:55:27,764 INFO L78 Accepts]: Start accepts. Automaton has 49035 states and 158085 transitions. Word has length 26 [2021-06-05 13:55:27,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:27,764 INFO L482 AbstractCegarLoop]: Abstraction has 49035 states and 158085 transitions. [2021-06-05 13:55:27,764 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 13:55:27,764 INFO L276 IsEmpty]: Start isEmpty. Operand 49035 states and 158085 transitions. [2021-06-05 13:55:27,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:55:27,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:27,834 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:28,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1056 [2021-06-05 13:55:28,035 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:28,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:28,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1609641205, now seen corresponding path program 612 times [2021-06-05 13:55:28,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:28,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97912600] [2021-06-05 13:55:28,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:28,121 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 13:55:28,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:28,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97912600] [2021-06-05 13:55:28,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97912600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:28,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011733354] [2021-06-05 13:55:28,122 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 13:55:28,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:55:28,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:28,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:55:28,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:28,367 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 13:55:28,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011733354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:28,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:28,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-06-05 13:55:28,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789367484] [2021-06-05 13:55:28,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 13:55:28,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:28,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 13:55:28,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:55:28,368 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 13:55:28,602 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 13:55:29,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:29,872 INFO L93 Difference]: Finished difference Result 50135 states and 160799 transitions. [2021-06-05 13:55:29,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 13:55:29,873 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 13:55:29,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:29,987 INFO L225 Difference]: With dead ends: 50135 [2021-06-05 13:55:29,987 INFO L226 Difference]: Without dead ends: 50135 [2021-06-05 13:55:29,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3151 ImplicationChecksByTransitivity, 1270.8ms TimeCoverageRelationStatistics Valid=2688, Invalid=6624, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 13:55:30,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50135 states. [2021-06-05 13:55:30,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50135 to 48740. [2021-06-05 13:55:30,825 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 13:55:30,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48740 states to 48740 states and 157125 transitions. [2021-06-05 13:55:30,948 INFO L78 Accepts]: Start accepts. Automaton has 48740 states and 157125 transitions. Word has length 26 [2021-06-05 13:55:30,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:30,948 INFO L482 AbstractCegarLoop]: Abstraction has 48740 states and 157125 transitions. [2021-06-05 13:55:30,948 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 13:55:30,948 INFO L276 IsEmpty]: Start isEmpty. Operand 48740 states and 157125 transitions. [2021-06-05 13:55:31,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:55:31,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:31,015 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:31,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 616 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1057 [2021-06-05 13:55:31,215 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:31,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:31,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1996578805, now seen corresponding path program 613 times [2021-06-05 13:55:31,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:31,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233295381] [2021-06-05 13:55:31,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:31,282 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 13:55:31,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:31,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233295381] [2021-06-05 13:55:31,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233295381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:31,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294434707] [2021-06-05 13:55:31,283 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 13:55:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:31,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:55:31,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:31,472 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 13:55:31,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294434707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:31,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:31,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-06-05 13:55:31,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049655340] [2021-06-05 13:55:31,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 13:55:31,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:31,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 13:55:31,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:55:31,473 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 13:55:32,273 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-05 13:55:32,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:32,783 INFO L93 Difference]: Finished difference Result 50504 states and 161476 transitions. [2021-06-05 13:55:32,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 13:55:32,783 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 13:55:32,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:32,901 INFO L225 Difference]: With dead ends: 50504 [2021-06-05 13:55:32,901 INFO L226 Difference]: Without dead ends: 50486 [2021-06-05 13:55:32,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2374 ImplicationChecksByTransitivity, 1031.9ms TimeCoverageRelationStatistics Valid=2179, Invalid=5653, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 13:55:32,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50486 states. [2021-06-05 13:55:33,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50486 to 48154. [2021-06-05 13:55:33,790 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 13:55:33,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48154 states to 48154 states and 155270 transitions. [2021-06-05 13:55:33,911 INFO L78 Accepts]: Start accepts. Automaton has 48154 states and 155270 transitions. Word has length 26 [2021-06-05 13:55:33,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:33,912 INFO L482 AbstractCegarLoop]: Abstraction has 48154 states and 155270 transitions. [2021-06-05 13:55:33,912 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 13:55:33,912 INFO L276 IsEmpty]: Start isEmpty. Operand 48154 states and 155270 transitions. [2021-06-05 13:55:33,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:55:33,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:33,979 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:34,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1058 [2021-06-05 13:55:34,179 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:34,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:34,180 INFO L82 PathProgramCache]: Analyzing trace with hash 207696651, now seen corresponding path program 614 times [2021-06-05 13:55:34,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:34,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415166624] [2021-06-05 13:55:34,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:34,237 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 13:55:34,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:34,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415166624] [2021-06-05 13:55:34,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415166624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:34,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453522489] [2021-06-05 13:55:34,237 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 13:55:34,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:34,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:34,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:55:34,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:34,416 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 13:55:34,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453522489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:34,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:34,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-06-05 13:55:34,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683530755] [2021-06-05 13:55:34,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:55:34,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:34,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:55:34,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:55:34,417 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 13:55:35,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:35,651 INFO L93 Difference]: Finished difference Result 51269 states and 163226 transitions. [2021-06-05 13:55:35,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 13:55:35,659 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 13:55:35,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:35,986 INFO L225 Difference]: With dead ends: 51269 [2021-06-05 13:55:35,986 INFO L226 Difference]: Without dead ends: 51255 [2021-06-05 13:55:35,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2255 ImplicationChecksByTransitivity, 864.8ms TimeCoverageRelationStatistics Valid=2127, Invalid=5355, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 13:55:36,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51255 states. [2021-06-05 13:55:36,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51255 to 47385. [2021-06-05 13:55:36,636 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 13:55:36,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47385 states to 47385 states and 152831 transitions. [2021-06-05 13:55:36,758 INFO L78 Accepts]: Start accepts. Automaton has 47385 states and 152831 transitions. Word has length 26 [2021-06-05 13:55:36,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:36,758 INFO L482 AbstractCegarLoop]: Abstraction has 47385 states and 152831 transitions. [2021-06-05 13:55:36,758 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 13:55:36,758 INFO L276 IsEmpty]: Start isEmpty. Operand 47385 states and 152831 transitions. [2021-06-05 13:55:37,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:55:37,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:37,044 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:37,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1059,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:37,245 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:37,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:37,245 INFO L82 PathProgramCache]: Analyzing trace with hash 417349643, now seen corresponding path program 615 times [2021-06-05 13:55:37,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:37,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002953472] [2021-06-05 13:55:37,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:37,298 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 13:55:37,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:37,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002953472] [2021-06-05 13:55:37,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002953472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:37,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836547336] [2021-06-05 13:55:37,298 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 13:55:37,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 13:55:37,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:37,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:55:37,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:37,506 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 13:55:37,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836547336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:37,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:37,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-06-05 13:55:37,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452624140] [2021-06-05 13:55:37,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 13:55:37,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:37,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 13:55:37,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:55:37,507 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 13:55:38,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:38,695 INFO L93 Difference]: Finished difference Result 52305 states and 165969 transitions. [2021-06-05 13:55:38,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 13:55:38,696 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 13:55:38,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:38,787 INFO L225 Difference]: With dead ends: 52305 [2021-06-05 13:55:38,787 INFO L226 Difference]: Without dead ends: 52295 [2021-06-05 13:55:38,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 859.6ms TimeCoverageRelationStatistics Valid=2252, Invalid=5404, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 13:55:38,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52295 states. [2021-06-05 13:55:39,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52295 to 46559. [2021-06-05 13:55:39,642 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 13:55:39,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46559 states to 46559 states and 150148 transitions. [2021-06-05 13:55:39,753 INFO L78 Accepts]: Start accepts. Automaton has 46559 states and 150148 transitions. Word has length 26 [2021-06-05 13:55:39,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:39,753 INFO L482 AbstractCegarLoop]: Abstraction has 46559 states and 150148 transitions. [2021-06-05 13:55:39,754 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 13:55:39,754 INFO L276 IsEmpty]: Start isEmpty. Operand 46559 states and 150148 transitions. [2021-06-05 13:55:39,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:55:39,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:39,810 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:40,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1060 [2021-06-05 13:55:40,010 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:40,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:40,010 INFO L82 PathProgramCache]: Analyzing trace with hash 701207307, now seen corresponding path program 616 times [2021-06-05 13:55:40,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:40,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527337574] [2021-06-05 13:55:40,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:40,061 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 13:55:40,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:40,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527337574] [2021-06-05 13:55:40,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527337574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:40,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718577369] [2021-06-05 13:55:40,062 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 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 13:55:40,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:40,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:40,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:55:40,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:40,238 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 13:55:40,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718577369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:40,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:40,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 26 [2021-06-05 13:55:40,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836001082] [2021-06-05 13:55:40,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:55:40,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:40,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:55:40,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:55:40,239 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 13:55:41,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:41,593 INFO L93 Difference]: Finished difference Result 55404 states and 175292 transitions. [2021-06-05 13:55:41,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 13:55:41,594 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 13:55:41,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:41,718 INFO L225 Difference]: With dead ends: 55404 [2021-06-05 13:55:41,718 INFO L226 Difference]: Without dead ends: 55398 [2021-06-05 13:55:41,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2238 ImplicationChecksByTransitivity, 979.0ms TimeCoverageRelationStatistics Valid=2479, Invalid=5531, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 13:55:41,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55398 states. [2021-06-05 13:55:42,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55398 to 46786. [2021-06-05 13:55:42,586 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 13:55:42,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46786 states to 46786 states and 150883 transitions. [2021-06-05 13:55:42,703 INFO L78 Accepts]: Start accepts. Automaton has 46786 states and 150883 transitions. Word has length 26 [2021-06-05 13:55:42,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:42,703 INFO L482 AbstractCegarLoop]: Abstraction has 46786 states and 150883 transitions. [2021-06-05 13:55:42,703 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 13:55:42,703 INFO L276 IsEmpty]: Start isEmpty. Operand 46786 states and 150883 transitions. [2021-06-05 13:55:42,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:55:42,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:42,767 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:42,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1061,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:42,967 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:42,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:42,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1957289995, now seen corresponding path program 617 times [2021-06-05 13:55:42,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:42,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538736323] [2021-06-05 13:55:42,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:43,010 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 13:55:43,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:43,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538736323] [2021-06-05 13:55:43,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538736323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:43,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529010460] [2021-06-05 13:55:43,010 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 13:55:43,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:55:43,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:43,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:55:43,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:43,168 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 13:55:43,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529010460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:43,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:43,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 25 [2021-06-05 13:55:43,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698722932] [2021-06-05 13:55:43,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:55:43,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:43,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:55:43,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:55:43,168 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 13:55:44,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:44,588 INFO L93 Difference]: Finished difference Result 61492 states and 193983 transitions. [2021-06-05 13:55:44,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 13:55:44,589 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 13:55:44,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:44,729 INFO L225 Difference]: With dead ends: 61492 [2021-06-05 13:55:44,729 INFO L226 Difference]: Without dead ends: 61490 [2021-06-05 13:55:44,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2326 ImplicationChecksByTransitivity, 868.1ms TimeCoverageRelationStatistics Valid=2749, Invalid=5623, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 13:55:44,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61490 states. [2021-06-05 13:55:45,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61490 to 51712. [2021-06-05 13:55:45,873 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 13:55:46,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51712 states to 51712 states and 166337 transitions. [2021-06-05 13:55:46,005 INFO L78 Accepts]: Start accepts. Automaton has 51712 states and 166337 transitions. Word has length 26 [2021-06-05 13:55:46,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:46,005 INFO L482 AbstractCegarLoop]: Abstraction has 51712 states and 166337 transitions. [2021-06-05 13:55:46,005 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 13:55:46,005 INFO L276 IsEmpty]: Start isEmpty. Operand 51712 states and 166337 transitions. [2021-06-05 13:55:46,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:55:46,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:46,075 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:46,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,621 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:46,276 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:46,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:46,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1582166795, now seen corresponding path program 618 times [2021-06-05 13:55:46,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:46,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021537721] [2021-06-05 13:55:46,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:46,322 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 13:55:46,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:46,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021537721] [2021-06-05 13:55:46,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021537721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:46,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562037401] [2021-06-05 13:55:46,322 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 13:55:46,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:55:46,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:46,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:55:46,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:46,490 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 13:55:46,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562037401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:46,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:46,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 25 [2021-06-05 13:55:46,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419682363] [2021-06-05 13:55:46,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:55:46,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:46,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:55:46,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:55:46,491 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 13:55:47,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:47,926 INFO L93 Difference]: Finished difference Result 59948 states and 189010 transitions. [2021-06-05 13:55:47,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 13:55:47,927 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 13:55:47,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:48,057 INFO L225 Difference]: With dead ends: 59948 [2021-06-05 13:55:48,057 INFO L226 Difference]: Without dead ends: 59948 [2021-06-05 13:55:48,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 865.3ms TimeCoverageRelationStatistics Valid=2839, Invalid=5351, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 13:55:48,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59948 states. [2021-06-05 13:55:49,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59948 to 52817. [2021-06-05 13:55:49,130 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 13:55:49,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52817 states to 52817 states and 169998 transitions. [2021-06-05 13:55:49,277 INFO L78 Accepts]: Start accepts. Automaton has 52817 states and 169998 transitions. Word has length 26 [2021-06-05 13:55:49,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:49,277 INFO L482 AbstractCegarLoop]: Abstraction has 52817 states and 169998 transitions. [2021-06-05 13:55:49,277 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 13:55:49,277 INFO L276 IsEmpty]: Start isEmpty. Operand 52817 states and 169998 transitions. [2021-06-05 13:55:49,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:55:49,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:49,353 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:49,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1063,622 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:49,553 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:49,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:49,554 INFO L82 PathProgramCache]: Analyzing trace with hash -2141345695, now seen corresponding path program 619 times [2021-06-05 13:55:49,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:49,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110763080] [2021-06-05 13:55:49,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:49,598 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 13:55:49,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:49,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110763080] [2021-06-05 13:55:49,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110763080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:49,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001398434] [2021-06-05 13:55:49,598 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 13:55:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:49,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:55:49,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:49,756 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 13:55:49,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001398434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:49,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:49,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 25 [2021-06-05 13:55:49,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819468011] [2021-06-05 13:55:49,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:55:49,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:49,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:55:49,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:55:49,757 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 13:55:51,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:51,667 INFO L93 Difference]: Finished difference Result 59665 states and 188362 transitions. [2021-06-05 13:55:51,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-06-05 13:55:51,668 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 13:55:51,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:51,798 INFO L225 Difference]: With dead ends: 59665 [2021-06-05 13:55:51,798 INFO L226 Difference]: Without dead ends: 59656 [2021-06-05 13:55:51,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6476 ImplicationChecksByTransitivity, 1524.5ms TimeCoverageRelationStatistics Valid=5189, Invalid=13171, Unknown=0, NotChecked=0, Total=18360 [2021-06-05 13:55:51,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59656 states. [2021-06-05 13:55:52,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59656 to 52607. [2021-06-05 13:55:52,799 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 13:55:52,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52607 states to 52607 states and 169285 transitions. [2021-06-05 13:55:52,943 INFO L78 Accepts]: Start accepts. Automaton has 52607 states and 169285 transitions. Word has length 26 [2021-06-05 13:55:52,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:52,943 INFO L482 AbstractCegarLoop]: Abstraction has 52607 states and 169285 transitions. [2021-06-05 13:55:52,943 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 13:55:52,943 INFO L276 IsEmpty]: Start isEmpty. Operand 52607 states and 169285 transitions. [2021-06-05 13:55:53,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:55:53,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:53,016 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:53,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1064,623 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:53,217 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:53,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:53,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1606115893, now seen corresponding path program 620 times [2021-06-05 13:55:53,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:53,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361632994] [2021-06-05 13:55:53,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:53,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:53,266 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 13:55:53,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:53,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361632994] [2021-06-05 13:55:53,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361632994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:53,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567751191] [2021-06-05 13:55:53,266 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 13:55:53,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:53,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:53,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:55:53,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:53,428 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 13:55:53,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567751191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:53,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:53,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 26 [2021-06-05 13:55:53,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299460517] [2021-06-05 13:55:53,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:55:53,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:53,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:55:53,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:55:53,428 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 13:55:55,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:55,288 INFO L93 Difference]: Finished difference Result 59565 states and 188121 transitions. [2021-06-05 13:55:55,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 13:55:55,288 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 13:55:55,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:55,415 INFO L225 Difference]: With dead ends: 59565 [2021-06-05 13:55:55,416 INFO L226 Difference]: Without dead ends: 59553 [2021-06-05 13:55:55,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5711 ImplicationChecksByTransitivity, 1447.8ms TimeCoverageRelationStatistics Valid=4538, Invalid=11974, Unknown=0, NotChecked=0, Total=16512 [2021-06-05 13:55:55,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59553 states. [2021-06-05 13:55:56,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59553 to 52430. [2021-06-05 13:55:56,416 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 13:55:56,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52430 states to 52430 states and 168709 transitions. [2021-06-05 13:55:56,554 INFO L78 Accepts]: Start accepts. Automaton has 52430 states and 168709 transitions. Word has length 26 [2021-06-05 13:55:56,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:56,554 INFO L482 AbstractCegarLoop]: Abstraction has 52430 states and 168709 transitions. [2021-06-05 13:55:56,554 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 13:55:56,554 INFO L276 IsEmpty]: Start isEmpty. Operand 52430 states and 168709 transitions. [2021-06-05 13:55:56,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:55:56,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:56,626 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:56,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1065,624 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:56,826 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:56,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:56,826 INFO L82 PathProgramCache]: Analyzing trace with hash 2101106081, now seen corresponding path program 621 times [2021-06-05 13:55:56,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:56,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311495874] [2021-06-05 13:55:56,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:56,880 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 13:55:56,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:56,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311495874] [2021-06-05 13:55:56,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311495874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:56,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138907594] [2021-06-05 13:55:56,880 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 13:55:56,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:55:56,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:56,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:55:56,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:57,047 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 13:55:57,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138907594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:57,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:57,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-06-05 13:55:57,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648005449] [2021-06-05 13:55:57,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 13:55:57,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:57,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 13:55:57,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:55:57,048 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 13:55:58,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:58,771 INFO L93 Difference]: Finished difference Result 59613 states and 188281 transitions. [2021-06-05 13:55:58,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-06-05 13:55:58,772 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 13:55:58,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:58,900 INFO L225 Difference]: With dead ends: 59613 [2021-06-05 13:55:58,901 INFO L226 Difference]: Without dead ends: 59595 [2021-06-05 13:55:58,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5110 ImplicationChecksByTransitivity, 1178.4ms TimeCoverageRelationStatistics Valid=4017, Invalid=10989, Unknown=0, NotChecked=0, Total=15006 [2021-06-05 13:55:58,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59595 states. [2021-06-05 13:55:59,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59595 to 52335. [2021-06-05 13:55:59,902 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 13:56:00,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52335 states to 52335 states and 168401 transitions. [2021-06-05 13:56:00,026 INFO L78 Accepts]: Start accepts. Automaton has 52335 states and 168401 transitions. Word has length 26 [2021-06-05 13:56:00,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:00,027 INFO L482 AbstractCegarLoop]: Abstraction has 52335 states and 168401 transitions. [2021-06-05 13:56:00,027 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 13:56:00,027 INFO L276 IsEmpty]: Start isEmpty. Operand 52335 states and 168401 transitions. [2021-06-05 13:56:00,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:56:00,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:00,094 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:00,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 625 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1066 [2021-06-05 13:56:00,294 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:00,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:00,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1060870283, now seen corresponding path program 622 times [2021-06-05 13:56:00,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:00,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884829555] [2021-06-05 13:56:00,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:00,355 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 13:56:00,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:00,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884829555] [2021-06-05 13:56:00,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884829555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:00,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55144397] [2021-06-05 13:56:00,356 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 13:56:00,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:00,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:00,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:56:00,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:00,529 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 13:56:00,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55144397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:00,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:00,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-06-05 13:56:00,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764163294] [2021-06-05 13:56:00,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:56:00,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:00,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:56:00,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:56:00,530 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 13:56:01,332 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 8 [2021-06-05 13:56:02,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:02,147 INFO L93 Difference]: Finished difference Result 59909 states and 189167 transitions. [2021-06-05 13:56:02,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 13:56:02,147 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 13:56:02,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:02,256 INFO L225 Difference]: With dead ends: 59909 [2021-06-05 13:56:02,256 INFO L226 Difference]: Without dead ends: 59885 [2021-06-05 13:56:02,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4656 ImplicationChecksByTransitivity, 1289.3ms TimeCoverageRelationStatistics Valid=3628, Invalid=10178, Unknown=0, NotChecked=0, Total=13806 [2021-06-05 13:56:02,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59885 states. [2021-06-05 13:56:03,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59885 to 52847. [2021-06-05 13:56:03,258 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 13:56:03,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52847 states to 52847 states and 170018 transitions. [2021-06-05 13:56:03,398 INFO L78 Accepts]: Start accepts. Automaton has 52847 states and 170018 transitions. Word has length 26 [2021-06-05 13:56:03,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:03,398 INFO L482 AbstractCegarLoop]: Abstraction has 52847 states and 170018 transitions. [2021-06-05 13:56:03,398 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 13:56:03,398 INFO L276 IsEmpty]: Start isEmpty. Operand 52847 states and 170018 transitions. [2021-06-05 13:56:03,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:56:03,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:03,471 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:03,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 626 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1067 [2021-06-05 13:56:03,672 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:03,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:03,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1121668383, now seen corresponding path program 623 times [2021-06-05 13:56:03,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:03,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231757292] [2021-06-05 13:56:03,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:03,741 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 13:56:03,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:03,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231757292] [2021-06-05 13:56:03,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231757292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:03,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66905488] [2021-06-05 13:56:03,741 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 13:56:03,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:56:03,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:03,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:56:03,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:03,920 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 13:56:03,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66905488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:03,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:03,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-06-05 13:56:03,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572513783] [2021-06-05 13:56:03,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 13:56:03,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:03,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 13:56:03,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:56:03,921 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 13:56:04,705 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2021-06-05 13:56:05,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:05,501 INFO L93 Difference]: Finished difference Result 60734 states and 191714 transitions. [2021-06-05 13:56:05,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 13:56:05,502 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 13:56:05,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:05,634 INFO L225 Difference]: With dead ends: 60734 [2021-06-05 13:56:05,635 INFO L226 Difference]: Without dead ends: 60704 [2021-06-05 13:56:05,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4342 ImplicationChecksByTransitivity, 1271.0ms TimeCoverageRelationStatistics Valid=3372, Invalid=9510, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 13:56:05,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60704 states. [2021-06-05 13:56:06,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60704 to 53530. [2021-06-05 13:56:06,670 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 13:56:06,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53530 states to 53530 states and 172201 transitions. [2021-06-05 13:56:06,812 INFO L78 Accepts]: Start accepts. Automaton has 53530 states and 172201 transitions. Word has length 26 [2021-06-05 13:56:06,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:06,812 INFO L482 AbstractCegarLoop]: Abstraction has 53530 states and 172201 transitions. [2021-06-05 13:56:06,812 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 13:56:06,812 INFO L276 IsEmpty]: Start isEmpty. Operand 53530 states and 172201 transitions. [2021-06-05 13:56:06,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:56:06,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:06,898 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:07,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 627 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1068 [2021-06-05 13:56:07,099 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:07,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:07,100 INFO L82 PathProgramCache]: Analyzing trace with hash -60890293, now seen corresponding path program 624 times [2021-06-05 13:56:07,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:07,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810602064] [2021-06-05 13:56:07,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:07,177 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 13:56:07,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:07,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810602064] [2021-06-05 13:56:07,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810602064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:07,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334796116] [2021-06-05 13:56:07,177 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 13:56:07,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:56:07,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:07,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:56:07,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:07,367 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 13:56:07,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334796116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:07,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:07,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-06-05 13:56:07,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886742451] [2021-06-05 13:56:07,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 13:56:07,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:07,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 13:56:07,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:56:07,368 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 13:56:08,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:08,777 INFO L93 Difference]: Finished difference Result 60371 states and 190864 transitions. [2021-06-05 13:56:08,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 13:56:08,777 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 13:56:08,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:08,913 INFO L225 Difference]: With dead ends: 60371 [2021-06-05 13:56:08,913 INFO L226 Difference]: Without dead ends: 60335 [2021-06-05 13:56:08,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 1131.7ms TimeCoverageRelationStatistics Valid=3249, Invalid=8961, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 13:56:08,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60335 states. [2021-06-05 13:56:09,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60335 to 53577. [2021-06-05 13:56:09,983 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 13:56:10,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53577 states to 53577 states and 172366 transitions. [2021-06-05 13:56:10,121 INFO L78 Accepts]: Start accepts. Automaton has 53577 states and 172366 transitions. Word has length 26 [2021-06-05 13:56:10,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:10,121 INFO L482 AbstractCegarLoop]: Abstraction has 53577 states and 172366 transitions. [2021-06-05 13:56:10,121 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 13:56:10,121 INFO L276 IsEmpty]: Start isEmpty. Operand 53577 states and 172366 transitions. [2021-06-05 13:56:10,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:56:10,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:10,208 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:10,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 628 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1069 [2021-06-05 13:56:10,408 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:10,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:10,408 INFO L82 PathProgramCache]: Analyzing trace with hash -998099881, now seen corresponding path program 625 times [2021-06-05 13:56:10,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:10,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145199906] [2021-06-05 13:56:10,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:10,487 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 13:56:10,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:10,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145199906] [2021-06-05 13:56:10,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145199906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:10,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933681096] [2021-06-05 13:56:10,487 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 13:56:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:10,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:56:10,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:10,697 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 13:56:10,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933681096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:10,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:10,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-05 13:56:10,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569748737] [2021-06-05 13:56:10,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 13:56:10,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:10,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 13:56:10,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:56:10,698 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 13:56:12,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:12,187 INFO L93 Difference]: Finished difference Result 56189 states and 179477 transitions. [2021-06-05 13:56:12,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 13:56:12,187 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 13:56:12,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:12,285 INFO L225 Difference]: With dead ends: 56189 [2021-06-05 13:56:12,285 INFO L226 Difference]: Without dead ends: 56189 [2021-06-05 13:56:12,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3328 ImplicationChecksByTransitivity, 1009.0ms TimeCoverageRelationStatistics Valid=2804, Invalid=7096, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 13:56:12,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56189 states. [2021-06-05 13:56:13,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56189 to 53739. [2021-06-05 13:56:13,248 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 13:56:13,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53739 states to 53739 states and 172761 transitions. [2021-06-05 13:56:13,392 INFO L78 Accepts]: Start accepts. Automaton has 53739 states and 172761 transitions. Word has length 26 [2021-06-05 13:56:13,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:13,392 INFO L482 AbstractCegarLoop]: Abstraction has 53739 states and 172761 transitions. [2021-06-05 13:56:13,392 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 13:56:13,392 INFO L276 IsEmpty]: Start isEmpty. Operand 53739 states and 172761 transitions. [2021-06-05 13:56:13,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:56:13,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:13,480 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:13,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1070,629 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:13,681 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:13,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:13,681 INFO L82 PathProgramCache]: Analyzing trace with hash 429229263, now seen corresponding path program 626 times [2021-06-05 13:56:13,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:13,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418836022] [2021-06-05 13:56:13,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:13,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:13,753 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 13:56:13,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:13,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418836022] [2021-06-05 13:56:13,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418836022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:13,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076607668] [2021-06-05 13:56:13,753 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 13:56:13,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:13,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:13,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:56:13,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:13,955 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 13:56:13,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076607668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:13,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:13,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-05 13:56:13,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71600370] [2021-06-05 13:56:13,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 13:56:13,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:13,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 13:56:13,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:56:13,956 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 13:56:15,110 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-05 13:56:15,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:15,567 INFO L93 Difference]: Finished difference Result 57980 states and 184584 transitions. [2021-06-05 13:56:15,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 13:56:15,568 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 13:56:15,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:15,686 INFO L225 Difference]: With dead ends: 57980 [2021-06-05 13:56:15,686 INFO L226 Difference]: Without dead ends: 57980 [2021-06-05 13:56:15,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2578 ImplicationChecksByTransitivity, 1253.8ms TimeCoverageRelationStatistics Valid=2226, Invalid=5964, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 13:56:15,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57980 states. [2021-06-05 13:56:16,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57980 to 54223. [2021-06-05 13:56:16,704 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 13:56:16,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54223 states to 54223 states and 174271 transitions. [2021-06-05 13:56:16,845 INFO L78 Accepts]: Start accepts. Automaton has 54223 states and 174271 transitions. Word has length 26 [2021-06-05 13:56:16,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:16,845 INFO L482 AbstractCegarLoop]: Abstraction has 54223 states and 174271 transitions. [2021-06-05 13:56:16,845 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 13:56:16,845 INFO L276 IsEmpty]: Start isEmpty. Operand 54223 states and 174271 transitions. [2021-06-05 13:56:16,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:56:16,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:16,931 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:17,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:17,132 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:17,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:17,132 INFO L82 PathProgramCache]: Analyzing trace with hash 890914135, now seen corresponding path program 627 times [2021-06-05 13:56:17,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:17,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449329811] [2021-06-05 13:56:17,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:17,192 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 13:56:17,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:17,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449329811] [2021-06-05 13:56:17,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449329811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:17,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261532218] [2021-06-05 13:56:17,192 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 13:56:17,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:56:17,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:17,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:56:17,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:17,387 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 13:56:17,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261532218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:17,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:17,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 29 [2021-06-05 13:56:17,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316607022] [2021-06-05 13:56:17,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 13:56:17,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:17,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 13:56:17,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:56:17,388 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 13:56:18,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:18,766 INFO L93 Difference]: Finished difference Result 59778 states and 190004 transitions. [2021-06-05 13:56:18,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 13:56:18,767 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 13:56:18,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:18,887 INFO L225 Difference]: With dead ends: 59778 [2021-06-05 13:56:18,887 INFO L226 Difference]: Without dead ends: 59778 [2021-06-05 13:56:18,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2458 ImplicationChecksByTransitivity, 852.6ms TimeCoverageRelationStatistics Valid=2139, Invalid=5693, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 13:56:18,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59778 states. [2021-06-05 13:56:19,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59778 to 54766. [2021-06-05 13:56:19,916 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 13:56:20,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54766 states to 54766 states and 176041 transitions. [2021-06-05 13:56:20,059 INFO L78 Accepts]: Start accepts. Automaton has 54766 states and 176041 transitions. Word has length 26 [2021-06-05 13:56:20,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:20,059 INFO L482 AbstractCegarLoop]: Abstraction has 54766 states and 176041 transitions. [2021-06-05 13:56:20,059 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 13:56:20,059 INFO L276 IsEmpty]: Start isEmpty. Operand 54766 states and 176041 transitions. [2021-06-05 13:56:20,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:56:20,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:20,146 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:20,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1072 [2021-06-05 13:56:20,346 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:20,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:20,346 INFO L82 PathProgramCache]: Analyzing trace with hash 490165199, now seen corresponding path program 628 times [2021-06-05 13:56:20,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:20,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383792791] [2021-06-05 13:56:20,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:20,404 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 13:56:20,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:20,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383792791] [2021-06-05 13:56:20,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383792791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:20,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017179628] [2021-06-05 13:56:20,404 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 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 13:56:20,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:20,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:20,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:56:20,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:20,599 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 13:56:20,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017179628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:20,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:20,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2021-06-05 13:56:20,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433163277] [2021-06-05 13:56:20,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:56:20,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:20,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:56:20,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:56:20,600 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 13:56:22,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:22,053 INFO L93 Difference]: Finished difference Result 61776 states and 196083 transitions. [2021-06-05 13:56:22,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 13:56:22,053 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 13:56:22,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:22,176 INFO L225 Difference]: With dead ends: 61776 [2021-06-05 13:56:22,176 INFO L226 Difference]: Without dead ends: 61776 [2021-06-05 13:56:22,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2536 ImplicationChecksByTransitivity, 885.5ms TimeCoverageRelationStatistics Valid=2245, Invalid=5765, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 13:56:22,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61776 states. [2021-06-05 13:56:23,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61776 to 55382. [2021-06-05 13:56:23,201 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 13:56:23,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55382 states to 55382 states and 178093 transitions. [2021-06-05 13:56:23,346 INFO L78 Accepts]: Start accepts. Automaton has 55382 states and 178093 transitions. Word has length 26 [2021-06-05 13:56:23,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:23,346 INFO L482 AbstractCegarLoop]: Abstraction has 55382 states and 178093 transitions. [2021-06-05 13:56:23,346 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 13:56:23,346 INFO L276 IsEmpty]: Start isEmpty. Operand 55382 states and 178093 transitions. [2021-06-05 13:56:23,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:56:23,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:23,435 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:23,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1073,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:23,636 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:23,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:23,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1585616471, now seen corresponding path program 629 times [2021-06-05 13:56:23,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:23,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113070996] [2021-06-05 13:56:23,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:23,682 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 13:56:23,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:23,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113070996] [2021-06-05 13:56:23,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113070996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:23,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085593612] [2021-06-05 13:56:23,683 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 13:56:23,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:56:23,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:23,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:56:23,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:23,862 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 13:56:23,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085593612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:23,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:23,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 27 [2021-06-05 13:56:23,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637322194] [2021-06-05 13:56:23,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 13:56:23,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:23,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 13:56:23,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:56:23,862 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 13:56:25,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:25,336 INFO L93 Difference]: Finished difference Result 63917 states and 202424 transitions. [2021-06-05 13:56:25,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 13:56:25,336 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 13:56:25,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:25,463 INFO L225 Difference]: With dead ends: 63917 [2021-06-05 13:56:25,464 INFO L226 Difference]: Without dead ends: 63917 [2021-06-05 13:56:25,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 893.3ms TimeCoverageRelationStatistics Valid=2471, Invalid=5901, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 13:56:25,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63917 states. [2021-06-05 13:56:26,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63917 to 55909. [2021-06-05 13:56:26,508 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 13:56:26,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55909 states to 55909 states and 179847 transitions. [2021-06-05 13:56:26,653 INFO L78 Accepts]: Start accepts. Automaton has 55909 states and 179847 transitions. Word has length 26 [2021-06-05 13:56:26,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:26,653 INFO L482 AbstractCegarLoop]: Abstraction has 55909 states and 179847 transitions. [2021-06-05 13:56:26,654 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 13:56:26,654 INFO L276 IsEmpty]: Start isEmpty. Operand 55909 states and 179847 transitions. [2021-06-05 13:56:26,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:56:26,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:26,739 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:26,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1074,633 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:26,940 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:26,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:26,940 INFO L82 PathProgramCache]: Analyzing trace with hash -318709041, now seen corresponding path program 630 times [2021-06-05 13:56:26,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:26,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718281449] [2021-06-05 13:56:26,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:26,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:26,982 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 13:56:26,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:26,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718281449] [2021-06-05 13:56:26,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718281449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:26,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848195895] [2021-06-05 13:56:26,982 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 13:56:27,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:56:27,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:27,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:56:27,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:27,156 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 13:56:27,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848195895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:27,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:27,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 26 [2021-06-05 13:56:27,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720568555] [2021-06-05 13:56:27,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 13:56:27,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:27,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 13:56:27,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:56:27,157 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 13:56:28,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:28,677 INFO L93 Difference]: Finished difference Result 67726 states and 213649 transitions. [2021-06-05 13:56:28,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 13:56:28,677 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 13:56:28,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:28,794 INFO L225 Difference]: With dead ends: 67726 [2021-06-05 13:56:28,794 INFO L226 Difference]: Without dead ends: 67726 [2021-06-05 13:56:28,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3072 ImplicationChecksByTransitivity, 907.1ms TimeCoverageRelationStatistics Valid=2751, Invalid=5991, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 13:56:28,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67726 states. [2021-06-05 13:56:29,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67726 to 57648. [2021-06-05 13:56:29,874 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 13:56:30,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57648 states to 57648 states and 185417 transitions. [2021-06-05 13:56:30,028 INFO L78 Accepts]: Start accepts. Automaton has 57648 states and 185417 transitions. Word has length 26 [2021-06-05 13:56:30,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:30,028 INFO L482 AbstractCegarLoop]: Abstraction has 57648 states and 185417 transitions. [2021-06-05 13:56:30,028 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 13:56:30,028 INFO L276 IsEmpty]: Start isEmpty. Operand 57648 states and 185417 transitions. [2021-06-05 13:56:30,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:56:30,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:30,117 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:30,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1075,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:30,318 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:30,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:30,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1211422889, now seen corresponding path program 631 times [2021-06-05 13:56:30,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:30,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619092658] [2021-06-05 13:56:30,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:30,358 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 13:56:30,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:30,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619092658] [2021-06-05 13:56:30,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619092658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:30,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094209971] [2021-06-05 13:56:30,358 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 13:56:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:30,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:56:30,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:30,521 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 13:56:30,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094209971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:30,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:30,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 25 [2021-06-05 13:56:30,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165531781] [2021-06-05 13:56:30,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:56:30,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:30,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:56:30,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:56:30,522 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 13:56:32,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:32,009 INFO L93 Difference]: Finished difference Result 81582 states and 257737 transitions. [2021-06-05 13:56:32,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 13:56:32,010 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 13:56:32,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:32,177 INFO L225 Difference]: With dead ends: 81582 [2021-06-05 13:56:32,177 INFO L226 Difference]: Without dead ends: 81582 [2021-06-05 13:56:32,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3004 ImplicationChecksByTransitivity, 828.2ms TimeCoverageRelationStatistics Valid=2766, Invalid=5424, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 13:56:32,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81582 states. [2021-06-05 13:56:33,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81582 to 72472. [2021-06-05 13:56:33,617 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 13:56:33,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72472 states to 72472 states and 232903 transitions. [2021-06-05 13:56:33,806 INFO L78 Accepts]: Start accepts. Automaton has 72472 states and 232903 transitions. Word has length 26 [2021-06-05 13:56:33,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:33,806 INFO L482 AbstractCegarLoop]: Abstraction has 72472 states and 232903 transitions. [2021-06-05 13:56:33,806 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 13:56:33,806 INFO L276 IsEmpty]: Start isEmpty. Operand 72472 states and 232903 transitions. [2021-06-05 13:56:33,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:56:33,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:33,912 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:34,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:34,113 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:34,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:34,113 INFO L82 PathProgramCache]: Analyzing trace with hash -639968083, now seen corresponding path program 632 times [2021-06-05 13:56:34,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:34,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681844675] [2021-06-05 13:56:34,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:34,152 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 13:56:34,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:34,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681844675] [2021-06-05 13:56:34,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681844675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:34,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429383782] [2021-06-05 13:56:34,153 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 13:56:34,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:34,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:34,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:56:34,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:34,313 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 13:56:34,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429383782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:34,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:34,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 25 [2021-06-05 13:56:34,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847013641] [2021-06-05 13:56:34,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 13:56:34,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:34,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 13:56:34,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:56:34,314 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 13:56:36,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:36,561 INFO L93 Difference]: Finished difference Result 78475 states and 248463 transitions. [2021-06-05 13:56:36,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-06-05 13:56:36,562 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 13:56:36,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:36,741 INFO L225 Difference]: With dead ends: 78475 [2021-06-05 13:56:36,741 INFO L226 Difference]: Without dead ends: 78469 [2021-06-05 13:56:36,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9089 ImplicationChecksByTransitivity, 1528.1ms TimeCoverageRelationStatistics Valid=5710, Invalid=15752, Unknown=0, NotChecked=0, Total=21462 [2021-06-05 13:56:36,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78469 states. Received shutdown request... [2021-06-05 13:56:38,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78469 to 72280. [2021-06-05 13:56:38,233 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 13:56:38,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1077 [2021-06-05 13:56:38,434 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 13:56:38,436 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 13:56:38,438 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 13:56:38,438 INFO L202 PluginConnector]: Adding new model fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 01:56:38 BasicIcfg [2021-06-05 13:56:38,438 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 13:56:38,438 INFO L168 Benchmark]: Toolchain (without parser) took 866770.14 ms. Allocated memory was 369.1 MB in the beginning and 15.8 GB in the end (delta: 15.4 GB). Free memory was 349.4 MB in the beginning and 13.4 GB in the end (delta: -13.1 GB). Peak memory consumption was 2.9 GB. Max. memory is 16.0 GB. [2021-06-05 13:56:38,439 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 369.1 MB. Free memory was 350.5 MB in the beginning and 350.4 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 13:56:38,439 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.75 ms. Allocated memory is still 369.1 MB. Free memory was 349.3 MB in the beginning and 347.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 13:56:38,439 INFO L168 Benchmark]: Boogie Preprocessor took 10.74 ms. Allocated memory is still 369.1 MB. Free memory was 347.9 MB in the beginning and 346.9 MB in the end (delta: 918.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 13:56:38,439 INFO L168 Benchmark]: RCFGBuilder took 179.50 ms. Allocated memory is still 369.1 MB. Free memory was 346.9 MB in the beginning and 332.4 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 13:56:38,439 INFO L168 Benchmark]: TraceAbstraction took 866556.90 ms. Allocated memory was 369.1 MB in the beginning and 15.8 GB in the end (delta: 15.4 GB). Free memory was 332.0 MB in the beginning and 13.4 GB in the end (delta: -13.1 GB). Peak memory consumption was 2.9 GB. Max. memory is 16.0 GB. [2021-06-05 13:56:38,439 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 0.11 ms. Allocated memory is still 369.1 MB. Free memory was 350.5 MB in the beginning and 350.4 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.75 ms. Allocated memory is still 369.1 MB. Free memory was 349.3 MB in the beginning and 347.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.74 ms. Allocated memory is still 369.1 MB. Free memory was 347.9 MB in the beginning and 346.9 MB in the end (delta: 918.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 179.50 ms. Allocated memory is still 369.1 MB. Free memory was 346.9 MB in the beginning and 332.4 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 866556.90 ms. Allocated memory was 369.1 MB in the beginning and 15.8 GB in the end (delta: 15.4 GB). Free memory was 332.0 MB in the beginning and 13.4 GB in the end (delta: -13.1 GB). Peak memory consumption was 2.9 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 ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - 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 ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - 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: 866479.7ms, OverallIterations: 646, TraceHistogramMax: 7, EmptinessCheckTime: 13913.0ms, AutomataDifference: 392727.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 40.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 30888 SDtfs, 104820 SDslu, 280555 SDs, 0 SdLazy, 251379 SolverSat, 21942 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 88227.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42949 GetRequests, 10020 SyntacticMatches, 797 SemanticMatches, 32132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697886 ImplicationChecksByTransitivity, 299656.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=72472occurred in iteration=645, InterpolantAutomatonStates: 27444, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 192156.2ms AutomataMinimizationTime, 646 MinimizatonAttempts, 972173 StatesRemovedByMinimization, 643 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2082.0ms SsaConstructionTime, 6817.9ms SatisfiabilityAnalysisTime, 118797.4ms InterpolantComputationTime, 28808 NumberOfCodeBlocks, 28808 NumberOfCodeBlocksAsserted, 2532 NumberOfCheckSat, 27527 ConstructedInterpolants, 0 QuantifiedInterpolants, 183105 SizeOfPredicates, 1702 NumberOfNonLiveVariables, 62831 ConjunctsInSsa, 14416 ConjunctsInUnsatCore, 1281 InterpolantComputations, 11 PerfectInterpolantSequences, 12094/38155 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